Merge branch 'master' into service/fix/aut-traits

.cargo/config.toml

@@ -1,5 +1,6 @@
 [alias]
-lint = "clippy --workspace --all-features --tests --examples --bins -- -Dclippy::todo"
+lint = "clippy --workspace --tests --examples --bins -- -Dclippy::todo"
+lint-all = "clippy --workspace --all-features --tests --examples --bins -- -Dclippy::todo"
 
 ci-doctest = "test --workspace --all-features --doc --no-fail-fast -- --nocapture"
 
@@ -13,7 +14,7 @@ ci-check = "hack --workspace --feature-powerset --exclude-features=io-uring chec
 ci-check-linux = "hack --workspace --feature-powerset check --tests --examples"
 
 # tests avoiding io-uring feature
-ci-test = "hack test --workspace --exclude=actix-rt --exclude=actix-server --all-features --lib --tests --no-fail-fast -- --nocapture"
+ci-test = "       hack --feature-powerset --exclude=actix-rt --exclude=actix-server --exclude-features=io-uring test --workspace --lib --tests --no-fail-fast -- --nocapture"
 ci-test-rt = "    hack --feature-powerset --exclude-features=io-uring test --package=actix-rt     --lib --tests --no-fail-fast -- --nocapture"
 ci-test-server = "hack --feature-powerset --exclude-features=io-uring test --package=actix-server --lib --tests --no-fail-fast -- --nocapture"
 

.github/workflows/ci.yml

@@ -112,9 +112,7 @@ jobs:
       - name: tests
         if: matrix.target.os == 'ubuntu-latest'
         run: |
-          cargo ci-test
-          cargo ci-test-rt-linux
-          cargo ci-test-server-linux
+          sudo bash -c "ulimit -Sl 512 && ulimit -Hl 512 && PATH=$PATH:/usr/share/rust/.cargo/bin && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-rt-linux && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-server-linux"
 
       - name: Clear the cargo caches
         run: |
@@ -141,7 +139,8 @@ jobs:
           args: cargo-hack
 
       - name: tests
-        run: cargo ci-test-lower-msrv
+        run: |
+          sudo bash -c "ulimit -Sl 512 && ulimit -Hl 512 && PATH=$PATH:/usr/share/rust/.cargo/bin && RUSTUP_TOOLCHAIN=1.46 cargo ci-test-lower-msrv"
 
       - name: Clear the cargo caches
         run: |
@@ -197,13 +196,6 @@ jobs:
       - name: Cache Dependencies
         uses: Swatinem/rust-cache@v1.3.0
 
-      - name: Install cargo-hack
-        uses: actions-rs/cargo@v1
-        with:
-          command: install
-          args: cargo-hack
-
-      - name: doc tests
-        uses: actions-rs/cargo@v1
-        timeout-minutes: 40
-        with: { command: ci-doctest }
+      - name: doc tests io-uring
+        run: |
+          sudo bash -c "ulimit -Sl 512 && ulimit -Hl 512 && PATH=$PATH:/usr/share/rust/.cargo/bin && RUSTUP_TOOLCHAIN=nightly cargo ci-doctest"

actix-codec/CHANGES.md

@@ -3,6 +3,14 @@
 ## Unreleased - 2021-xx-xx
 
 
+## 0.4.1 - 2021-11-05
+* Added `LinesCodec.` [#338]
+* `Framed::poll_ready` flushes when the buffer is full. [#409]
+
+[#338]: https://github.com/actix/actix-net/pull/338
+[#409]: https://github.com/actix/actix-net/pull/409
+
+
 ## 0.4.0 - 2021-04-20
 * No significant changes since v0.4.0-beta.1.
 

actix-codec/Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "actix-codec"
-version = "0.4.0"
-authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+version = "0.4.1"
+authors = [
+    "Nikolay Kim <fafhrd91@gmail.com>",
+    "Rob Ede <robjtede@icloud.com>",
+]
 description = "Codec utilities for working with framed protocols"
 keywords = ["network", "framework", "async", "futures"]
 repository = "https://github.com/actix/actix-net"
@@ -19,6 +22,15 @@ bytes = "1"
 futures-core = { version = "0.3.7", default-features = false }
 futures-sink = { version = "0.3.7", default-features = false }
 log = "0.4"
+memchr = "2.3"
 pin-project-lite = "0.2"
 tokio = "1.5.1"
 tokio-util = { version = "0.6", features = ["codec", "io"] }
+
+[dev-dependencies]
+criterion = { version = "0.3", features = ["html_reports"] }
+tokio-test = "0.4.2"
+
+[[bench]]
+name = "lines"
+harness = false

actix-codec/benches/lines.rs

@@ -0,0 +1,57 @@
+use bytes::BytesMut;
+use criterion::{criterion_group, criterion_main, Criterion};
+
+const INPUT: &[u8] = include_bytes!("./lorem.txt");
+
+fn bench_lines_codec(c: &mut Criterion) {
+    let mut decode_group = c.benchmark_group("lines decode");
+
+    decode_group.bench_function("actix", |b| {
+        b.iter(|| {
+            use actix_codec::Decoder as _;
+
+            let mut codec = actix_codec::LinesCodec::default();
+            let mut buf = BytesMut::from(INPUT);
+            while let Ok(Some(_bytes)) = codec.decode_eof(&mut buf) {}
+        });
+    });
+
+    decode_group.bench_function("tokio", |b| {
+        b.iter(|| {
+            use tokio_util::codec::Decoder as _;
+
+            let mut codec = tokio_util::codec::LinesCodec::new();
+            let mut buf = BytesMut::from(INPUT);
+            while let Ok(Some(_bytes)) = codec.decode_eof(&mut buf) {}
+        });
+    });
+
+    decode_group.finish();
+
+    let mut encode_group = c.benchmark_group("lines encode");
+
+    encode_group.bench_function("actix", |b| {
+        b.iter(|| {
+            use actix_codec::Encoder as _;
+
+            let mut codec = actix_codec::LinesCodec::default();
+            let mut buf = BytesMut::new();
+            codec.encode("123", &mut buf).unwrap();
+        });
+    });
+
+    encode_group.bench_function("tokio", |b| {
+        b.iter(|| {
+            use tokio_util::codec::Encoder as _;
+
+            let mut codec = tokio_util::codec::LinesCodec::new();
+            let mut buf = BytesMut::new();
+            codec.encode("123", &mut buf).unwrap();
+        });
+    });
+
+    encode_group.finish();
+}
+
+criterion_group!(benches, bench_lines_codec);
+criterion_main!(benches);

actix-codec/benches/lorem.txt

@@ -0,0 +1,5 @@
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tortor quam, pulvinar sit amet vestibulum eget, tincidunt non urna. Sed eu sem in felis malesuada venenatis. Suspendisse volutpat aliquet nisi, in condimentum nibh convallis id. Quisque gravida felis scelerisque ipsum aliquam consequat. Praesent libero odio, malesuada vitae odio quis, aliquam aliquet enim. In fringilla ut turpis nec pharetra. Duis eu posuere metus. Sed a aliquet massa. Mauris non tempus mi, quis mattis libero. Vivamus ornare ex at semper cursus. Vestibulum sed facilisis erat, aliquet mollis est. In interdum, magna iaculis ultricies elementum, mi ante vestibulum mauris, nec viverra turpis lorem quis ante. Proin in auctor erat. Vivamus dictum congue massa, fermentum bibendum leo pretium quis. Integer dapibus sodales ligula, sit amet imperdiet felis suscipit eu. Phasellus non ornare enim.
+Nam feugiat neque sit amet hendrerit rhoncus. Nunc suscipit molestie vehicula. Aenean vulputate porttitor augue, sit amet molestie dolor volutpat vitae. Nulla vitae condimentum eros. Aliquam tristique purus at metus lacinia egestas. Cras euismod lorem eu orci lobortis, sed tincidunt nisl laoreet. Ut suscipit fermentum mi, et euismod tortor. Pellentesque vitae tempor quam, sed dignissim mi. Suspendisse luctus lacus vitae ligula blandit vehicula. Quisque interdum iaculis tincidunt. Nunc elementum mi vitae tempor placerat. Suspendisse potenti. Donec blandit laoreet ipsum, quis rhoncus velit vulputate sed.
+Aliquam suscipit lectus eros, at maximus dolor efficitur quis. Integer blandit tortor orci, nec mattis nunc eleifend ac. Mauris pharetra vel quam quis lacinia. Duis lobortis condimentum nunc ut facilisis. Praesent arcu nisi, porta sit amet viverra sit amet, pellentesque ut nisi. Nunc gravida tortor eu ligula tempus, in interdum magna pretium. Fusce eu ornare sapien. Nullam pellentesque cursus eros. Nam orci massa, faucibus eget leo eget, elementum vulputate erat. Fusce vehicula augue et dui hendrerit vulputate. Mauris neque lacus, porttitor ut condimentum id, efficitur ac neque. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia curae; Donec accumsan, lectus fermentum elementum tristique, ipsum tortor mollis ante, non lacinia nibh ex quis sapien.
+Donec pharetra, elit eget rutrum luctus, urna ligula facilisis lorem, sit amet rhoncus ante est eu mi. Vestibulum vestibulum ultricies interdum. Nulla tincidunt ante non hendrerit venenatis. Curabitur vestibulum turpis erat, id efficitur quam venenatis eu. Fusce nulla sem, dapibus vel quam feugiat, ornare fermentum ligula. Praesent tempus tincidunt mauris, non pellentesque felis varius in. Aenean eu arcu ligula. Morbi dapibus maximus nulla a pharetra. Fusce leo metus, luctus ut cursus non, sollicitudin non lectus. Integer pellentesque eleifend erat, vel gravida purus tempus a. Mauris id vestibulum quam. Nunc vitae ullamcorper metus, pharetra placerat enim. Fusce in ultrices nisl. Curabitur justo mauris, dignissim in aliquam sit amet, sollicitudin ut risus. Cras tempor rutrum justo, non tincidunt est maximus at.
+Aliquam ac velit tincidunt, ullamcorper velit sit amet, pulvinar nisi. Nullam rhoncus rhoncus egestas. Cras ac luctus nisi. Mauris sit amet risus at magna volutpat ultrices quis ac dui. Aliquam condimentum tellus purus, vel sagittis odio vulputate at. Sed ut finibus tellus. Aliquam tincidunt vehicula diam. 

actix-codec/src/bcodec.rs

@@ -1,11 +1,10 @@
-use bytes::{Buf, Bytes, BytesMut};
 use std::io;
 
+use bytes::{Buf, Bytes, BytesMut};
+
 use super::{Decoder, Encoder};
 
-/// Bytes codec.
-///
-/// Reads/Writes chunks of bytes from a stream.
+/// Bytes codec. Reads/writes chunks of bytes from a stream.
 #[derive(Debug, Copy, Clone)]
 pub struct BytesCodec;
 

actix-codec/src/framed.rs

@@ -300,11 +300,11 @@ where
 {
     type Error = U::Error;
 
-    fn poll_ready(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+    fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         if self.is_write_ready() {
             Poll::Ready(Ok(()))
         } else {
-            Poll::Pending
+            self.flush(cx)
         }
     }
 

actix-codec/src/lib.rs

@@ -14,9 +14,11 @@
 
 mod bcodec;
 mod framed;
+mod lines;
 
 pub use self::bcodec::BytesCodec;
 pub use self::framed::{Framed, FramedParts};
+pub use self::lines::LinesCodec;
 
 pub use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
 pub use tokio_util::codec::{Decoder, Encoder};

actix-codec/src/lines.rs

@@ -0,0 +1,158 @@
+use std::io;
+
+use bytes::{Buf, BufMut, Bytes, BytesMut};
+use memchr::memchr;
+
+use super::{Decoder, Encoder};
+
+/// Lines codec. Reads/writes line delimited strings.
+///
+/// Will split input up by LF or CRLF delimiters. I.e. carriage return characters at the end of
+/// lines are not preserved.
+#[derive(Debug, Copy, Clone, Default)]
+#[non_exhaustive]
+pub struct LinesCodec;
+
+impl<T: AsRef<str>> Encoder<T> for LinesCodec {
+    type Error = io::Error;
+
+    #[inline]
+    fn encode(&mut self, item: T, dst: &mut BytesMut) -> Result<(), Self::Error> {
+        let item = item.as_ref();
+        dst.reserve(item.len() + 1);
+        dst.put_slice(item.as_bytes());
+        dst.put_u8(b'\n');
+        Ok(())
+    }
+}
+
+impl Decoder for LinesCodec {
+    type Item = String;
+    type Error = io::Error;
+
+    fn decode(&mut self, src: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
+        if src.is_empty() {
+            return Ok(None);
+        }
+
+        let len = match memchr(b'\n', src) {
+            Some(n) => n,
+            None => {
+                return Ok(None);
+            }
+        };
+
+        // split up to new line char
+        let mut buf = src.split_to(len);
+        debug_assert_eq!(len, buf.len());
+
+        // remove new line char from source
+        src.advance(1);
+
+        match buf.last() {
+            // remove carriage returns at the end of buf
+            Some(b'\r') => buf.truncate(len - 1),
+
+            // line is empty
+            None => return Ok(Some(String::new())),
+
+            _ => {}
+        }
+
+        try_into_utf8(buf.freeze())
+    }
+
+    fn decode_eof(&mut self, src: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
+        match self.decode(src)? {
+            Some(frame) => Ok(Some(frame)),
+            None if src.is_empty() => Ok(None),
+            None => {
+                let buf = match src.last() {
+                    // if last line ends in a CR then take everything up to it
+                    Some(b'\r') => src.split_to(src.len() - 1),
+
+                    // take all bytes from source
+                    _ => src.split(),
+                };
+
+                if buf.is_empty() {
+                    return Ok(None);
+                }
+
+                try_into_utf8(buf.freeze())
+            }
+        }
+    }
+}
+
+// Attempts to convert bytes into a `String`.
+fn try_into_utf8(buf: Bytes) -> io::Result<Option<String>> {
+    String::from_utf8(buf.to_vec())
+        .map_err(|err| io::Error::new(io::ErrorKind::InvalidData, err))
+        .map(Some)
+}
+
+#[cfg(test)]
+mod tests {
+    use bytes::BufMut as _;
+
+    use super::*;
+
+    #[test]
+    fn lines_decoder() {
+        let mut codec = LinesCodec::default();
+        let mut buf = BytesMut::from("\nline 1\nline 2\r\nline 3\n\r\n\r");
+
+        assert_eq!("", codec.decode(&mut buf).unwrap().unwrap());
+        assert_eq!("line 1", codec.decode(&mut buf).unwrap().unwrap());
+        assert_eq!("line 2", codec.decode(&mut buf).unwrap().unwrap());
+        assert_eq!("line 3", codec.decode(&mut buf).unwrap().unwrap());
+        assert_eq!("", codec.decode(&mut buf).unwrap().unwrap());
+        assert!(codec.decode(&mut buf).unwrap().is_none());
+        assert!(codec.decode_eof(&mut buf).unwrap().is_none());
+
+        buf.put_slice(b"k");
+        assert!(codec.decode(&mut buf).unwrap().is_none());
+        assert_eq!("\rk", codec.decode_eof(&mut buf).unwrap().unwrap());
+
+        assert!(codec.decode(&mut buf).unwrap().is_none());
+        assert!(codec.decode_eof(&mut buf).unwrap().is_none());
+    }
+
+    #[test]
+    fn lines_encoder() {
+        let mut codec = LinesCodec::default();
+
+        let mut buf = BytesMut::new();
+
+        codec.encode("", &mut buf).unwrap();
+        assert_eq!(&buf[..], b"\n");
+
+        codec.encode("test", &mut buf).unwrap();
+        assert_eq!(&buf[..], b"\ntest\n");
+
+        codec.encode("a\nb", &mut buf).unwrap();
+        assert_eq!(&buf[..], b"\ntest\na\nb\n");
+    }
+
+    #[test]
+    fn lines_encoder_no_overflow() {
+        let mut codec = LinesCodec::default();
+
+        let mut buf = BytesMut::new();
+        codec.encode("1234567", &mut buf).unwrap();
+        assert_eq!(&buf[..], b"1234567\n");
+
+        let mut buf = BytesMut::new();
+        codec.encode("12345678", &mut buf).unwrap();
+        assert_eq!(&buf[..], b"12345678\n");
+
+        let mut buf = BytesMut::new();
+        codec.encode("123456789111213", &mut buf).unwrap();
+        assert_eq!(&buf[..], b"123456789111213\n");
+
+        let mut buf = BytesMut::new();
+        codec.encode("1234567891112131", &mut buf).unwrap();
+        assert_eq!(&buf[..], b"1234567891112131\n");
+    }
+}

actix-codec/tests/test_framed_sink.rs

@@ -0,0 +1,221 @@
+use actix_codec::*;
+use bytes::Buf;
+use bytes::{BufMut, BytesMut};
+use futures_sink::Sink;
+use std::collections::VecDeque;
+use std::io::{self, Write};
+use std::pin::Pin;
+use std::task::Poll::{Pending, Ready};
+use std::task::{Context, Poll};
+use tokio_test::{assert_ready, task};
+
+macro_rules! bilateral {
+    ($($x:expr,)*) => {{
+        let mut v = VecDeque::new();
+        v.extend(vec![$($x),*]);
+        Bilateral { calls: v }
+    }};
+}
+
+macro_rules! assert_ready {
+    ($e:expr) => {{
+        use core::task::Poll::*;
+        match $e {
+            Ready(v) => v,
+            Pending => panic!("pending"),
+        }
+    }};
+    ($e:expr, $($msg:tt),+) => {{
+        use core::task::Poll::*;
+        match $e {
+            Ready(v) => v,
+            Pending => {
+                let msg = format_args!($($msg),+);
+                panic!("pending; {}", msg)
+            }
+        }
+    }};
+}
+
+#[derive(Debug)]
+pub struct Bilateral {
+    pub calls: VecDeque<io::Result<Vec<u8>>>,
+}
+
+impl Write for Bilateral {
+    fn write(&mut self, src: &[u8]) -> io::Result<usize> {
+        match self.calls.pop_front() {
+            Some(Ok(data)) => {
+                assert!(src.len() >= data.len());
+                assert_eq!(&data[..], &src[..data.len()]);
+                Ok(data.len())
+            }
+            Some(Err(e)) => Err(e),
+            None => panic!("unexpected write; {:?}", src),
+        }
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        Ok(())
+    }
+}
+
+impl AsyncWrite for Bilateral {
+    fn poll_write(
+        self: Pin<&mut Self>,
+        _cx: &mut Context<'_>,
+        buf: &[u8],
+    ) -> Poll<Result<usize, io::Error>> {
+        match Pin::get_mut(self).write(buf) {
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => Pending,
+            other => Ready(other),
+        }
+    }
+    fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
+        match Pin::get_mut(self).flush() {
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => Pending,
+            other => Ready(other),
+        }
+    }
+    fn poll_shutdown(
+        self: Pin<&mut Self>,
+        _cx: &mut Context<'_>,
+    ) -> Poll<Result<(), io::Error>> {
+        unimplemented!()
+    }
+}
+
+impl AsyncRead for Bilateral {
+    fn poll_read(
+        mut self: Pin<&mut Self>,
+        _: &mut Context<'_>,
+        buf: &mut ReadBuf<'_>,
+    ) -> Poll<Result<(), std::io::Error>> {
+        use io::ErrorKind::WouldBlock;
+
+        match self.calls.pop_front() {
+            Some(Ok(data)) => {
+                debug_assert!(buf.remaining() >= data.len());
+                buf.put_slice(&data);
+                Ready(Ok(()))
+            }
+            Some(Err(ref e)) if e.kind() == WouldBlock => Pending,
+            Some(Err(e)) => Ready(Err(e)),
+            None => Ready(Ok(())),
+        }
+    }
+}
+
+pub struct U32;
+
+impl Encoder<u32> for U32 {
+    type Error = io::Error;
+
+    fn encode(&mut self, item: u32, dst: &mut BytesMut) -> io::Result<()> {
+        // Reserve space
+        dst.reserve(4);
+        dst.put_u32(item);
+        Ok(())
+    }
+}
+
+impl Decoder for U32 {
+    type Item = u32;
+    type Error = io::Error;
+
+    fn decode(&mut self, buf: &mut BytesMut) -> io::Result<Option<u32>> {
+        if buf.len() < 4 {
+            return Ok(None);
+        }
+
+        let n = buf.split_to(4).get_u32();
+        Ok(Some(n))
+    }
+}
+
+#[test]
+fn test_write_hits_highwater_mark() {
+    // see here for what this test is based on:
+    // https://github.com/tokio-rs/tokio/blob/75c07770bfbfea4e5fd914af819c741ed9c3fc36/tokio-util/tests/framed_write.rs#L69
+
+    const ITER: usize = 2 * 1024;
+
+    let mut bi = bilateral! {
+        Err(io::Error::new(io::ErrorKind::WouldBlock, "not ready")),
+        Ok(b"".to_vec()),
+    };
+
+    for i in 0..=ITER {
+        let mut b = BytesMut::with_capacity(4);
+        b.put_u32(i as u32);
+
+        // Append to the end
+        match bi.calls.back_mut().unwrap() {
+            Ok(ref mut data) => {
+                // Write in 2kb chunks
+                if data.len() < ITER {
+                    data.extend_from_slice(&b[..]);
+                    continue;
+                } // else fall through and create a new buffer
+            }
+            _ => unreachable!(),
+        }
+
+        // Push a new new chunk
+        bi.calls.push_back(Ok(b[..].to_vec()));
+    }
+
+    assert_eq!(bi.calls.len(), 6);
+    let mut framed = Framed::new(bi, U32);
+    // Send 8KB. This fills up FramedWrite2 buffer
+    let mut task = task::spawn(());
+    task.enter(|cx, _| {
+        // Send 8KB. This fills up Framed buffer
+        for i in 0..ITER {
+            {
+                #[allow(unused_mut)]
+                let mut framed = Pin::new(&mut framed);
+                assert!(assert_ready!(framed.poll_ready(cx)).is_ok());
+            }
+
+            #[allow(unused_mut)]
+            let mut framed = Pin::new(&mut framed);
+            // write the buffer
+            assert!(framed.start_send(i as u32).is_ok());
+        }
+
+        {
+            #[allow(unused_mut)]
+            let mut framed = Pin::new(&mut framed);
+
+            // Now we poll_ready which forces a flush. The bilateral pops the front message
+            // and decides to block.
+            assert!(framed.poll_ready(cx).is_pending());
+        }
+
+        {
+            #[allow(unused_mut)]
+            let mut framed = Pin::new(&mut framed);
+            // We poll again, forcing another flush, which this time succeeds
+            // The whole 8KB buffer is flushed
+            assert!(assert_ready!(framed.poll_ready(cx)).is_ok());
+        }
+
+        {
+            #[allow(unused_mut)]
+            let mut framed = Pin::new(&mut framed);
+            // Send more data. This matches the final message expected by the bilateral
+            assert!(framed.start_send(ITER as u32).is_ok());
+        }
+
+        {
+            #[allow(unused_mut)]
+            let mut framed = Pin::new(&mut framed);
+            // Flush the rest of the buffer
+            assert!(assert_ready!(framed.poll_flush(cx)).is_ok());
+        }
+
+        // Ensure the mock is empty
+        assert_eq!(0, Pin::new(&framed).get_ref().io_ref().calls.len());
+    });
+}

actix-rt/CHANGES.md

@@ -3,6 +3,20 @@
 ## Unreleased - 2021-xx-xx
 
 
+## 2.5.0 - 2021-11-22
+* Add `System::run_with_code` to allow retrieving the exit code on stop. [#411]
+
+[#411]: https://github.com/actix/actix-net/pull/411
+
+
+## 2.4.0 - 2021-11-05
+* Add `Arbiter::try_current` for situations where thread may or may not have Arbiter context. [#408]
+* Start io-uring with `System::new` when feature is enabled. [#395]
+
+[#395]: https://github.com/actix/actix-net/pull/395
+[#408]: https://github.com/actix/actix-net/pull/408
+
+
 ## 2.3.0 - 2021-10-11
 * The `spawn` method can now resolve with non-unit outputs. [#369]
 * Add experimental (semver-exempt) `io-uring` feature for enabling async file I/O on linux. [#374]
@@ -100,7 +114,7 @@
 [#129]: https://github.com/actix/actix-net/issues/129
 
 
-## 1.1.0 - 2020-04-08 (YANKED)
+## 1.1.0 - 2020-04-08 _(YANKED)_
 * Expose `System::is_set` to check if current system has ben started [#99]
 * Add `Arbiter::is_running` to check if event loop is running [#124]
 * Add `Arbiter::local_join` associated function

actix-rt/Cargo.toml

@@ -1,9 +1,10 @@
 [package]
 name = "actix-rt"
-version = "2.3.0"
+version = "2.5.0"
 authors = [
     "Nikolay Kim <fafhrd91@gmail.com>",
     "Rob Ede <robjtede@icloud.com>",
+    "fakeshadow <24548779@qq.com>",
 ]
 description = "Tokio-based single-threaded async runtime for the Actix ecosystem"
 keywords = ["async", "futures", "io", "runtime"]

actix-rt/README.md

@@ -3,11 +3,11 @@
 > Tokio-based single-threaded async runtime for the Actix ecosystem.
 
 [![crates.io](https://img.shields.io/crates/v/actix-rt?label=latest)](https://crates.io/crates/actix-rt)
-[![Documentation](https://docs.rs/actix-rt/badge.svg?version=2.3.0)](https://docs.rs/actix-rt/2.3.0)
+[![Documentation](https://docs.rs/actix-rt/badge.svg?version=2.5.0)](https://docs.rs/actix-rt/2.5.0)
 [![Version](https://img.shields.io/badge/rustc-1.46+-ab6000.svg)](https://blog.rust-lang.org/2020/03/12/Rust-1.46.html)
 ![MIT or Apache 2.0 licensed](https://img.shields.io/crates/l/actix-rt.svg)
 <br />
-[![dependency status](https://deps.rs/crate/actix-rt/2.3.0/status.svg)](https://deps.rs/crate/actix-rt/2.3.0)
+[![dependency status](https://deps.rs/crate/actix-rt/2.5.0/status.svg)](https://deps.rs/crate/actix-rt/2.5.0)
 ![Download](https://img.shields.io/crates/d/actix-rt.svg)
 [![Chat on Discord](https://img.shields.io/discord/771444961383153695?label=chat&logo=discord)](https://discord.gg/WghFtEH6Hb)
 

actix-rt/src/arbiter.rs

@@ -240,6 +240,15 @@ impl Arbiter {
         })
     }
 
+    /// Try to get current running arbiter handle.
+    ///
+    /// Returns `None` if no Arbiter has been started.
+    ///
+    /// Unlike [`current`](Self::current), this never panics.
+    pub fn try_current() -> Option<ArbiterHandle> {
+        HANDLE.with(|cell| cell.borrow().clone())
+    }
+
     /// Stop Arbiter from continuing it's event loop.
     ///
     /// Returns true if stop message was sent successfully and false if the Arbiter has been dropped.

actix-rt/src/lib.rs

@@ -15,7 +15,7 @@
 //! blocking task thread-pool using [`task::spawn_blocking`].
 //!
 //! # Examples
-//! ```
+//! ```no_run
 //! use std::sync::mpsc;
 //! use actix_rt::{Arbiter, System};
 //!
@@ -36,10 +36,13 @@
 //! # `io-uring` Support
 //! There is experimental support for using io-uring with this crate by enabling the
 //! `io-uring` feature. For now, it is semver exempt.
+//!
+//! Note that there are currently some unimplemented parts of using `actix-rt` with `io-uring`.
+//! In particular, when running a `System`, only `System::block_on` is supported.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![allow(clippy::type_complexity)]
 #![warn(missing_docs)]
+#![allow(clippy::type_complexity)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 

actix-rt/src/system.rs

@@ -11,7 +11,7 @@ use std::{
 use futures_core::ready;
 use tokio::sync::{mpsc, oneshot};
 
-use crate::{arbiter::ArbiterHandle, runtime::default_tokio_runtime, Arbiter, Runtime};
+use crate::{arbiter::ArbiterHandle, Arbiter};
 
 static SYSTEM_COUNT: AtomicUsize = AtomicUsize::new(0);
 
@@ -29,6 +29,7 @@ pub struct System {
     arbiter_handle: ArbiterHandle,
 }
 
+#[cfg(not(feature = "io-uring"))]
 impl System {
     /// Create a new system.
     ///
@@ -37,7 +38,7 @@ impl System {
     #[allow(clippy::new_ret_no_self)]
     pub fn new() -> SystemRunner {
         Self::with_tokio_rt(|| {
-            default_tokio_runtime()
+            crate::runtime::default_tokio_runtime()
                 .expect("Default Actix (Tokio) runtime could not be created.")
         })
     }
@@ -53,7 +54,7 @@ impl System {
         let (stop_tx, stop_rx) = oneshot::channel();
         let (sys_tx, sys_rx) = mpsc::unbounded_channel();
 
-        let rt = Runtime::from(runtime_factory());
+        let rt = crate::runtime::Runtime::from(runtime_factory());
         let sys_arbiter = rt.block_on(async { Arbiter::in_new_system() });
         let system = System::construct(sys_tx, sys_arbiter.clone());
 
@@ -66,13 +67,34 @@ impl System {
         let sys_ctrl = SystemController::new(sys_rx, stop_tx);
         rt.spawn(sys_ctrl);
 
-        SystemRunner {
-            rt,
-            stop_rx,
-            system,
+        SystemRunner { rt, stop_rx }
     }
 }
 
+#[cfg(feature = "io-uring")]
+impl System {
+    /// Create a new system.
+    ///
+    /// # Panics
+    /// Panics if underlying Tokio runtime can not be created.
+    #[allow(clippy::new_ret_no_self)]
+    pub fn new() -> SystemRunner {
+        SystemRunner
+    }
+
+    /// Create a new System using the [Tokio Runtime](tokio-runtime) returned from a closure.
+    ///
+    /// [tokio-runtime]: tokio::runtime::Runtime
+    #[doc(hidden)]
+    pub fn with_tokio_rt<F>(_: F) -> SystemRunner
+    where
+        F: Fn() -> tokio::runtime::Runtime,
+    {
+        unimplemented!("System::with_tokio_rt is not implemented for io-uring feature yet")
+    }
+}
+
+impl System {
     /// Constructs new system and registers it on the current thread.
     pub(crate) fn construct(
         sys_tx: mpsc::UnboundedSender<SystemCommand>,
@@ -104,7 +126,7 @@ impl System {
     ///
     /// Returns `None` if no System has been started.
     ///
-    /// Contrary to `current`, this never panics.
+    /// Unlike [`current`](Self::current), this never panics.
     pub fn try_current() -> Option<System> {
         CURRENT.with(|cell| cell.borrow().clone())
     }
@@ -150,35 +172,36 @@ impl System {
 }
 
 /// Runner that keeps a [System]'s event loop alive until stop message is received.
+#[cfg(not(feature = "io-uring"))]
 #[must_use = "A SystemRunner does nothing unless `run` is called."]
 #[derive(Debug)]
 pub struct SystemRunner {
-    rt: Runtime,
+    rt: crate::runtime::Runtime,
     stop_rx: oneshot::Receiver<i32>,
-    #[allow(dead_code)]
-    system: System,
 }
 
+#[cfg(not(feature = "io-uring"))]
 impl SystemRunner {
     /// Starts event loop and will return once [System] is [stopped](System::stop).
     pub fn run(self) -> io::Result<()> {
+        let exit_code = self.run_with_code()?;
+
+        match exit_code {
+            0 => Ok(()),
+            nonzero => Err(io::Error::new(
+                io::ErrorKind::Other,
+                format!("Non-zero exit code: {}", nonzero),
+            )),
+        }
+    }
+
+    /// Runs the event loop until [stopped](System::stop_with_code), returning the exit code.
+    pub fn run_with_code(self) -> io::Result<i32> {
         let SystemRunner { rt, stop_rx, .. } = self;
 
         // run loop
-        match rt.block_on(stop_rx) {
-            Ok(code) => {
-                if code != 0 {
-                    Err(io::Error::new(
-                        io::ErrorKind::Other,
-                        format!("Non-zero exit code: {}", code),
-                    ))
-                } else {
-                    Ok(())
-                }
-            }
-
-            Err(e) => Err(io::Error::new(io::ErrorKind::Other, e)),
-        }
+        rt.block_on(stop_rx)
+            .map_err(|err| io::Error::new(io::ErrorKind::Other, err))
     }
 
     /// Runs the provided future, blocking the current thread until the future completes.
@@ -188,6 +211,52 @@ impl SystemRunner {
     }
 }
 
+/// Runner that keeps a [System]'s event loop alive until stop message is received.
+#[cfg(feature = "io-uring")]
+#[must_use = "A SystemRunner does nothing unless `run` is called."]
+#[derive(Debug)]
+pub struct SystemRunner;
+
+#[cfg(feature = "io-uring")]
+impl SystemRunner {
+    /// Starts event loop and will return once [System] is [stopped](System::stop).
+    pub fn run(self) -> io::Result<()> {
+        unimplemented!("SystemRunner::run is not implemented for io-uring feature yet");
+    }
+
+    /// Runs the event loop until [stopped](System::stop_with_code), returning the exit code.
+    pub fn run_with_code(self) -> io::Result<i32> {
+        unimplemented!(
+            "SystemRunner::run_with_code is not implemented for io-uring feature yet"
+        );
+    }
+
+    /// Runs the provided future, blocking the current thread until the future completes.
+    #[inline]
+    pub fn block_on<F: Future>(&self, fut: F) -> F::Output {
+        tokio_uring::start(async move {
+            let (stop_tx, stop_rx) = oneshot::channel();
+            let (sys_tx, sys_rx) = mpsc::unbounded_channel();
+
+            let sys_arbiter = Arbiter::in_new_system();
+            let system = System::construct(sys_tx, sys_arbiter.clone());
+
+            system
+                .tx()
+                .send(SystemCommand::RegisterArbiter(usize::MAX, sys_arbiter))
+                .unwrap();
+
+            // init background system arbiter
+            let sys_ctrl = SystemController::new(sys_rx, stop_tx);
+            tokio_uring::spawn(sys_ctrl);
+
+            let res = fut.await;
+            drop(stop_rx);
+            res
+        })
+    }
+}
+
 #[derive(Debug)]
 pub(crate) enum SystemCommand {
     Exit(i32),

actix-rt/tests/tests.rs

@@ -1,12 +1,15 @@
 use std::{
     future::Future,
-    sync::mpsc::channel,
-    thread,
     time::{Duration, Instant},
 };
 
 use actix_rt::{task::JoinError, Arbiter, System};
-use tokio::sync::oneshot;
+
+#[cfg(not(feature = "io-uring"))]
+use {
+    std::{sync::mpsc::channel, thread},
+    tokio::sync::oneshot,
+};
 
 #[test]
 fn await_for_timer() {
@@ -21,6 +24,15 @@ fn await_for_timer() {
     );
 }
 
+#[cfg(not(feature = "io-uring"))]
+#[test]
+fn run_with_code() {
+    let sys = System::new();
+    System::current().stop_with_code(42);
+    let exit_code = sys.run_with_code().expect("system stop should not error");
+    assert_eq!(exit_code, 42);
+}
+
 #[test]
 fn join_another_arbiter() {
     let time = Duration::from_secs(1);
@@ -96,13 +108,17 @@ fn wait_for_spawns() {
 
     let handle = rt.spawn(async {
         println!("running on the runtime");
-        // assertion panic is caught at task boundary
-        assert_eq!(1, 2);
+        // panic is caught at task boundary
+        panic!("intentional test panic");
     });
 
     assert!(rt.block_on(handle).is_err());
 }
 
+// Temporary disabled tests for io-uring feature.
+// They should be enabled when possible.
+
+#[cfg(not(feature = "io-uring"))]
 #[test]
 fn arbiter_spawn_fn_runs() {
     let _ = System::new();
@@ -119,6 +135,7 @@ fn arbiter_spawn_fn_runs() {
     arbiter.join().unwrap();
 }
 
+#[cfg(not(feature = "io-uring"))]
 #[test]
 fn arbiter_handle_spawn_fn_runs() {
     let sys = System::new();
@@ -141,6 +158,7 @@ fn arbiter_handle_spawn_fn_runs() {
     sys.run().unwrap();
 }
 
+#[cfg(not(feature = "io-uring"))]
 #[test]
 fn arbiter_drop_no_panic_fn() {
     let _ = System::new();
@@ -152,6 +170,7 @@ fn arbiter_drop_no_panic_fn() {
     arbiter.join().unwrap();
 }
 
+#[cfg(not(feature = "io-uring"))]
 #[test]
 fn arbiter_drop_no_panic_fut() {
     let _ = System::new();
@@ -163,18 +182,7 @@ fn arbiter_drop_no_panic_fut() {
     arbiter.join().unwrap();
 }
 
-#[test]
-#[should_panic]
-fn no_system_current_panic() {
-    System::current();
-}
-
-#[test]
-#[should_panic]
-fn no_system_arbiter_new_panic() {
-    Arbiter::new();
-}
-
+#[cfg(not(feature = "io-uring"))]
 #[test]
 fn system_arbiter_spawn() {
     let runner = System::new();
@@ -205,6 +213,7 @@ fn system_arbiter_spawn() {
     thread.join().unwrap();
 }
 
+#[cfg(not(feature = "io-uring"))]
 #[test]
 fn system_stop_stops_arbiters() {
     let sys = System::new();
@@ -293,6 +302,18 @@ fn new_arbiter_with_tokio() {
     assert!(!counter.load(Ordering::SeqCst));
 }
 
+#[test]
+#[should_panic]
+fn no_system_current_panic() {
+    System::current();
+}
+
+#[test]
+#[should_panic]
+fn no_system_arbiter_new_panic() {
+    Arbiter::new();
+}
+
 #[test]
 fn try_current_no_system() {
     assert!(System::try_current().is_none())
@@ -330,7 +351,7 @@ fn spawn_local() {
 #[cfg(all(target_os = "linux", feature = "io-uring"))]
 #[test]
 fn tokio_uring_arbiter() {
-    let system = System::new();
+    System::new().block_on(async {
         let (tx, rx) = std::sync::mpsc::channel();
 
         Arbiter::new().spawn(async move {
@@ -352,6 +373,5 @@ fn tokio_uring_arbiter() {
         });
 
         assert!(rx.recv().unwrap());
-
-    drop(system);
+    })
 }

actix-server/CHANGES.md

@@ -1,8 +1,32 @@
 # Changes
 
 ## Unreleased - 2021-xx-xx
+
+
+## 2.0.0-beta.9 - 2021-11-15
+* Restore `Arbiter` support lost in `beta.8`. [#417]
+
+[#417]: https://github.com/actix/actix-net/pull/417
+
+
+## 2.0.0-beta.8 - 2021-11-05 _(YANKED)_
+* Fix non-unix signal handler. [#410]
+
+[#410]: https://github.com/actix/actix-net/pull/410
+
+
+## 2.0.0-beta.7 - 2021-11-05 _(YANKED)_
+* Server can be started in regular Tokio runtime. [#408]
+* Expose new `Server` type whose `Future` impl resolves when server stops. [#408]
+* Rename `Server` to `ServerHandle`. [#407]
+* Add `Server::handle` to obtain handle to server. [#408]
+* Rename `ServerBuilder::{maxconn => max_concurrent_connections}`. [#407]
+* Deprecate crate-level `new` shortcut for server builder. [#408]
 * Minimum supported Rust version (MSRV) is now 1.52.
 
+[#407]: https://github.com/actix/actix-net/pull/407
+[#408]: https://github.com/actix/actix-net/pull/408
+
 
 ## 2.0.0-beta.6 - 2021-10-11
 * Add experimental (semver-exempt) `io-uring` feature for enabling async file I/O on linux. [#374]

actix-server/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "actix-server"
-version = "2.0.0-beta.6"
+version = "2.0.0-beta.9"
 authors = [
     "Nikolay Kim <fafhrd91@gmail.com>",
     "fakeshadow <24548779@qq.com>",
@@ -18,24 +18,29 @@ path = "src/lib.rs"
 
 [features]
 default = []
-io-uring = ["actix-rt/io-uring"]
+io-uring = ["tokio-uring", "actix-rt/io-uring"]
 
 [dependencies]
-actix-rt = { version = "2.0.0", default-features = false }
+actix-rt = { version = "2.4.0", default-features = false }
 actix-service = "2.0.0"
 actix-utils = "3.0.0"
 
 futures-core = { version = "0.3.7", default-features = false, features = ["alloc"] }
+futures-util = { version = "0.3.7", default-features = false, features = ["alloc"] }
 log = "0.4"
-mio = { version = "0.7.6", features = ["os-poll", "net"] }
+mio = { version = "0.8", features = ["os-poll", "net"] }
 num_cpus = "1.13"
+socket2 = "0.4.2"
 tokio = { version = "1.5.1", features = ["sync"] }
 
+# runtime for io-uring feature
+tokio-uring = { version = "0.1", optional = true }
+
 [dev-dependencies]
 actix-codec = "0.4.0"
-actix-rt = "2.0.0"
+actix-rt = "2.4.0"
 
 bytes = "1"
 env_logger = "0.9"
 futures-util = { version = "0.3.7", default-features = false, features = ["sink"] }
-tokio = { version = "1.5.1", features = ["io-util"] }
+tokio = { version = "1.5.1", features = ["io-util", "rt-multi-thread", "macros"] }

actix-server/examples/tcp-echo.rs

@@ -10,7 +10,7 @@
 //! the length of each line it echos and the total size of data sent when the connection is closed.
 
 use std::{
-    env, io,
+    io,
     sync::{
         atomic::{AtomicUsize, Ordering},
         Arc,
@@ -23,12 +23,10 @@ use actix_service::{fn_service, ServiceFactoryExt as _};
 use bytes::BytesMut;
 use futures_util::future::ok;
 use log::{error, info};
-use tokio::io::{AsyncReadExt, AsyncWriteExt};
+use tokio::io::{AsyncReadExt as _, AsyncWriteExt as _};
 
-#[actix_rt::main]
-async fn main() -> io::Result<()> {
-    env::set_var("RUST_LOG", "info");
-    env_logger::init();
+async fn run() -> io::Result<()> {
+    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info")).init();
 
     let count = Arc::new(AtomicUsize::new(0));
 
@@ -88,3 +86,16 @@ async fn main() -> io::Result<()> {
         .run()
         .await
 }
+
+#[tokio::main]
+async fn main() -> io::Result<()> {
+    run().await?;
+    Ok(())
+}
+
+// alternatively:
+// #[actix_rt::main]
+// async fn main() -> io::Result<()> {
+//     run().await?;
+//     Ok(())
+// }

actix-server/src/accept.rs

@@ -1,17 +1,18 @@
-use std::time::Duration;
-use std::{io, thread};
+use std::{io, thread, time::Duration};
 
-use actix_rt::{
-    time::{sleep, Instant},
-    System,
-};
-use log::{error, info};
+use actix_rt::time::Instant;
+use log::{debug, error, info};
 use mio::{Interest, Poll, Token as MioToken};
 
-use crate::server::Server;
-use crate::socket::MioListener;
-use crate::waker_queue::{WakerInterest, WakerQueue, WAKER_TOKEN};
-use crate::worker::{Conn, WorkerHandleAccept};
+use crate::{
+    availability::Availability,
+    socket::MioListener,
+    waker_queue::{WakerInterest, WakerQueue, WAKER_TOKEN},
+    worker::{Conn, ServerWorker, WorkerHandleAccept, WorkerHandleServer},
+    ServerBuilder, ServerHandle,
+};
+
+const TIMEOUT_DURATION_ON_ERROR: Duration = Duration::from_millis(510);
 
 struct ServerSocketInfo {
     token: usize,
@@ -20,203 +21,113 @@ struct ServerSocketInfo {
 
     /// Timeout is used to mark the deadline when this socket's listener should be registered again
     /// after an error.
-    timeout: Option<Instant>,
-}
-
-/// Accept loop would live with `ServerBuilder`.
-///
-/// It's tasked with construct `Poll` instance and `WakerQueue` which would be distributed to
-/// `Accept` and `Worker`.
-///
-/// It would also listen to `ServerCommand` and push interests to `WakerQueue`.
-pub(crate) struct AcceptLoop {
-    srv: Option<Server>,
-    poll: Option<Poll>,
-    waker: WakerQueue,
-}
-
-impl AcceptLoop {
-    pub fn new(srv: Server) -> Self {
-        let poll = Poll::new().unwrap_or_else(|e| panic!("Can not create `mio::Poll`: {}", e));
-        let waker = WakerQueue::new(poll.registry())
-            .unwrap_or_else(|e| panic!("Can not create `mio::Waker`: {}", e));
-
-        Self {
-            srv: Some(srv),
-            poll: Some(poll),
-            waker,
-        }
-    }
-
-    pub(crate) fn waker_owned(&self) -> WakerQueue {
-        self.waker.clone()
-    }
-
-    pub fn wake(&self, i: WakerInterest) {
-        self.waker.wake(i);
-    }
-
-    pub(crate) fn start(
-        &mut self,
-        socks: Vec<(usize, MioListener)>,
-        handles: Vec<WorkerHandleAccept>,
-    ) {
-        let srv = self.srv.take().expect("Can not re-use AcceptInfo");
-        let poll = self.poll.take().unwrap();
-        let waker = self.waker.clone();
-
-        Accept::start(poll, waker, socks, srv, handles);
-    }
+    timeout: Option<actix_rt::time::Instant>,
 }
 
 /// poll instance of the server.
-struct Accept {
+pub(crate) struct Accept {
     poll: Poll,
-    waker: WakerQueue,
+    waker_queue: WakerQueue,
     handles: Vec<WorkerHandleAccept>,
-    srv: Server,
+    srv: ServerHandle,
     next: usize,
     avail: Availability,
+    /// use the smallest duration from sockets timeout.
+    timeout: Option<Duration>,
     paused: bool,
 }
 
-/// Array of u128 with every bit as marker for a worker handle's availability.
-#[derive(Debug, Default)]
-struct Availability([u128; 4]);
-
-impl Availability {
-    /// Check if any worker handle is available
-    #[inline(always)]
-    fn available(&self) -> bool {
-        self.0.iter().any(|a| *a != 0)
-    }
-
-    /// Check if worker handle is available by index
-    #[inline(always)]
-    fn get_available(&self, idx: usize) -> bool {
-        let (offset, idx) = Self::offset(idx);
-
-        self.0[offset] & (1 << idx as u128) != 0
-    }
-
-    /// Set worker handle available state by index.
-    fn set_available(&mut self, idx: usize, avail: bool) {
-        let (offset, idx) = Self::offset(idx);
-
-        let off = 1 << idx as u128;
-        if avail {
-            self.0[offset] |= off;
-        } else {
-            self.0[offset] &= !off
-        }
-    }
-
-    /// Set all worker handle to available state.
-    /// This would result in a re-check on all workers' availability.
-    fn set_available_all(&mut self, handles: &[WorkerHandleAccept]) {
-        handles.iter().for_each(|handle| {
-            self.set_available(handle.idx(), true);
-        })
-    }
-
-    /// Get offset and adjusted index of given worker handle index.
-    fn offset(idx: usize) -> (usize, usize) {
-        if idx < 128 {
-            (0, idx)
-        } else if idx < 128 * 2 {
-            (1, idx - 128)
-        } else if idx < 128 * 3 {
-            (2, idx - 128 * 2)
-        } else if idx < 128 * 4 {
-            (3, idx - 128 * 3)
-        } else {
-            panic!("Max WorkerHandle count is 512")
-        }
-    }
-}
-
-/// This function defines errors that are per-connection. Which basically
-/// means that if we get this error from `accept()` system call it means
-/// next connection might be ready to be accepted.
-///
-/// All other errors will incur a timeout before next `accept()` is performed.
-/// The timeout is useful to handle resource exhaustion errors like ENFILE
-/// and EMFILE. Otherwise, could enter into tight loop.
-fn connection_error(e: &io::Error) -> bool {
-    e.kind() == io::ErrorKind::ConnectionRefused
-        || e.kind() == io::ErrorKind::ConnectionAborted
-        || e.kind() == io::ErrorKind::ConnectionReset
-}
-
 impl Accept {
     pub(crate) fn start(
-        poll: Poll,
-        waker: WakerQueue,
-        socks: Vec<(usize, MioListener)>,
-        srv: Server,
-        handles: Vec<WorkerHandleAccept>,
-    ) {
-        // Accept runs in its own thread and would want to spawn additional futures to current
-        // actix system.
-        let sys = System::current();
-        thread::Builder::new()
-            .name("actix-server accept loop".to_owned())
-            .spawn(move || {
-                System::set_current(sys);
-                let (mut accept, mut sockets) =
-                    Accept::new_with_sockets(poll, waker, socks, handles, srv);
+        sockets: Vec<(usize, MioListener)>,
+        builder: &ServerBuilder,
+    ) -> io::Result<(WakerQueue, Vec<WorkerHandleServer>)> {
+        let handle_server = ServerHandle::new(builder.cmd_tx.clone());
 
-                accept.poll_with(&mut sockets);
+        // construct poll instance and its waker
+        let poll = Poll::new()?;
+        let waker_queue = WakerQueue::new(poll.registry())?;
+
+        // start workers and collect handles
+        let (handles_accept, handles_server) = (0..builder.threads)
+            .map(|idx| {
+                // clone service factories
+                let factories = builder
+                    .factories
+                    .iter()
+                    .map(|f| f.clone_factory())
+                    .collect::<Vec<_>>();
+
+                // start worker using service factories
+                ServerWorker::start(idx, factories, waker_queue.clone(), builder.worker_config)
             })
-            .unwrap();
+            .collect::<io::Result<Vec<_>>>()?
+            .into_iter()
+            .unzip();
+
+        let (mut accept, mut sockets) = Accept::new_with_sockets(
+            poll,
+            waker_queue.clone(),
+            sockets,
+            handles_accept,
+            handle_server,
+        )?;
+
+        thread::Builder::new()
+            .name("actix-server acceptor".to_owned())
+            .spawn(move || accept.poll_with(&mut sockets))
+            .map_err(|err| io::Error::new(io::ErrorKind::Other, err))?;
+
+        Ok((waker_queue, handles_server))
     }
 
     fn new_with_sockets(
         poll: Poll,
-        waker: WakerQueue,
-        socks: Vec<(usize, MioListener)>,
-        handles: Vec<WorkerHandleAccept>,
-        srv: Server,
-    ) -> (Accept, Vec<ServerSocketInfo>) {
-        let sockets = socks
+        waker_queue: WakerQueue,
+        sockets: Vec<(usize, MioListener)>,
+        accept_handles: Vec<WorkerHandleAccept>,
+        server_handle: ServerHandle,
+    ) -> io::Result<(Accept, Box<[ServerSocketInfo]>)> {
+        let sockets = sockets
             .into_iter()
             .map(|(token, mut lst)| {
                 // Start listening for incoming connections
                 poll.registry()
-                    .register(&mut lst, MioToken(token), Interest::READABLE)
-                    .unwrap_or_else(|e| panic!("Can not register io: {}", e));
+                    .register(&mut lst, MioToken(token), Interest::READABLE)?;
 
-                ServerSocketInfo {
+                Ok(ServerSocketInfo {
                     token,
                     lst,
                     timeout: None,
-                }
                 })
-            .collect();
+            })
+            .collect::<io::Result<_>>()?;
 
         let mut avail = Availability::default();
 
         // Assume all handles are avail at construct time.
-        avail.set_available_all(&handles);
+        avail.set_available_all(&accept_handles);
 
         let accept = Accept {
             poll,
-            waker,
-            handles,
-            srv,
+            waker_queue,
+            handles: accept_handles,
+            srv: server_handle,
             next: 0,
             avail,
+            timeout: None,
             paused: false,
         };
 
-        (accept, sockets)
+        Ok((accept, sockets))
     }
 
+    /// blocking wait for readiness events triggered by mio
     fn poll_with(&mut self, sockets: &mut [ServerSocketInfo]) {
-        let mut events = mio::Events::with_capacity(128);
+        let mut events = mio::Events::with_capacity(256);
 
         loop {
-            if let Err(e) = self.poll.poll(&mut events, None) {
+            if let Err(e) = self.poll.poll(&mut events, self.timeout) {
                 match e.kind() {
                     io::ErrorKind::Interrupted => {}
                     _ => panic!("Poll error: {}", e),
@@ -229,7 +140,7 @@ impl Accept {
                     WAKER_TOKEN => {
                         let exit = self.handle_waker(sockets);
                         if exit {
-                            info!("Accept is stopped.");
+                            info!("Accept thread stopped");
                             return;
                         }
                     }
@@ -239,6 +150,9 @@ impl Accept {
                     }
                 }
             }
+
+            // check for timeout and re-register sockets
+            self.process_timeout(sockets);
         }
     }
 
@@ -249,7 +163,7 @@ impl Accept {
         loop {
             // take guard with every iteration so no new interest can be added
             // until the current task is done.
-            let mut guard = self.waker.guard();
+            let mut guard = self.waker_queue.guard();
             match guard.pop_front() {
                 // worker notify it becomes available.
                 Some(WakerInterest::WorkerAvailable(idx)) => {
@@ -261,6 +175,7 @@ impl Accept {
                         self.accept_all(sockets);
                     }
                 }
+
                 // a new worker thread is made and it's handle would be added to Accept
                 Some(WakerInterest::Worker(handle)) => {
                     drop(guard);
@@ -272,12 +187,7 @@ impl Accept {
                         self.accept_all(sockets);
                     }
                 }
-                // got timer interest and it's time to try register socket(s) again
-                Some(WakerInterest::Timer) => {
-                    drop(guard);
 
-                    self.process_timer(sockets)
-                }
                 Some(WakerInterest::Pause) => {
                     drop(guard);
 
@@ -287,6 +197,7 @@ impl Accept {
                         self.deregister_all(sockets);
                     }
                 }
+
                 Some(WakerInterest::Resume) => {
                     drop(guard);
 
@@ -300,6 +211,7 @@ impl Accept {
                         self.accept_all(sockets);
                     }
                 }
+
                 Some(WakerInterest::Stop) => {
                     if !self.paused {
                         self.deregister_all(sockets);
@@ -307,6 +219,7 @@ impl Accept {
 
                     return true;
                 }
+
                 // waker queue is drained
                 None => {
                     // Reset the WakerQueue before break so it does not grow infinitely
@@ -318,8 +231,11 @@ impl Accept {
         }
     }
 
-    fn process_timer(&self, sockets: &mut [ServerSocketInfo]) {
+    fn process_timeout(&mut self, sockets: &mut [ServerSocketInfo]) {
+        // always remove old timeouts
+        if self.timeout.take().is_some() {
             let now = Instant::now();
+
             sockets
                 .iter_mut()
                 // Only sockets that had an associated timeout were deregistered.
@@ -328,8 +244,11 @@ impl Accept {
                     let inst = info.timeout.take().unwrap();
 
                     if now < inst {
+                        // still timed out; try to set new timeout
                         info.timeout = Some(inst);
+                        self.set_timeout(inst - now);
                     } else if !self.paused {
+                        // timeout expired; register socket again
                         self.register_logged(info);
                     }
 
@@ -338,6 +257,19 @@ impl Accept {
                     // a timeout value so this socket register will be delayed till then.
                 });
         }
+    }
+
+    /// Update accept timeout with `duration` if it is shorter than current timeout.
+    fn set_timeout(&mut self, duration: Duration) {
+        match self.timeout {
+            Some(ref mut timeout) => {
+                if *timeout > duration {
+                    *timeout = duration;
+                }
+            }
+            None => self.timeout = Some(duration),
+        }
+    }
 
     #[cfg(not(target_os = "windows"))]
     fn register(&self, info: &mut ServerSocketInfo) -> io::Result<()> {
@@ -365,14 +297,14 @@ impl Accept {
 
     fn register_logged(&self, info: &mut ServerSocketInfo) {
         match self.register(info) {
-            Ok(_) => info!("Resume accepting connections on {}", info.lst.local_addr()),
+            Ok(_) => debug!("Resume accepting connections on {}", info.lst.local_addr()),
             Err(e) => error!("Can not register server socket {}", e),
         }
     }
 
     fn deregister_logged(&self, info: &mut ServerSocketInfo) {
         match self.poll.registry().deregister(&mut info.lst) {
-            Ok(_) => info!("Paused accepting connections on {}", info.lst.local_addr()),
+            Ok(_) => debug!("Paused accepting connections on {}", info.lst.local_addr()),
             Err(e) => {
                 error!("Can not deregister server socket {}", e)
             }
@@ -382,12 +314,12 @@ impl Accept {
     fn deregister_all(&self, sockets: &mut [ServerSocketInfo]) {
         // This is a best effort implementation with following limitation:
         //
-        // Every ServerSocketInfo with associate timeout will be skipped and it's timeout
-        // is removed in the process.
+        // Every ServerSocketInfo with associated timeout will be skipped and it's timeout is
+        // removed in the process.
         //
-        // Therefore WakerInterest::Pause followed by WakerInterest::Resume in a very short
-        // gap (less than 500ms) would cause all timing out ServerSocketInfos be reregistered
-        // before expected timing.
+        // Therefore WakerInterest::Pause followed by WakerInterest::Resume in a very short gap
+        // (less than 500ms) would cause all timing out ServerSocketInfos be re-registered before
+        // expected timing.
         sockets
             .iter_mut()
             // Take all timeout.
@@ -476,13 +408,7 @@ impl Accept {
                     // the poll would need it mark which socket and when it's
                     // listener should be registered
                     info.timeout = Some(Instant::now() + Duration::from_millis(500));
-
-                    // after the sleep a Timer interest is sent to Accept Poll
-                    let waker = self.waker.clone();
-                    System::current().arbiter().spawn(async move {
-                        sleep(Duration::from_millis(510)).await;
-                        waker.wake(WakerInterest::Timer);
-                    });
+                    self.set_timeout(TIMEOUT_DURATION_ON_ERROR);
 
                     return;
                 }
@@ -521,67 +447,14 @@ impl Accept {
     }
 }
 
-#[cfg(test)]
-mod test {
-    use super::Availability;
-
-    fn single(aval: &mut Availability, idx: usize) {
-        aval.set_available(idx, true);
-        assert!(aval.available());
-
-        aval.set_available(idx, true);
-
-        aval.set_available(idx, false);
-        assert!(!aval.available());
-
-        aval.set_available(idx, false);
-        assert!(!aval.available());
-    }
-
-    fn multi(aval: &mut Availability, mut idx: Vec<usize>) {
-        idx.iter().for_each(|idx| aval.set_available(*idx, true));
-
-        assert!(aval.available());
-
-        while let Some(idx) = idx.pop() {
-            assert!(aval.available());
-            aval.set_available(idx, false);
-        }
-
-        assert!(!aval.available());
-    }
-
-    #[test]
-    fn availability() {
-        let mut aval = Availability::default();
-
-        single(&mut aval, 1);
-        single(&mut aval, 128);
-        single(&mut aval, 256);
-        single(&mut aval, 511);
-
-        let idx = (0..511).filter(|i| i % 3 == 0 && i % 5 == 0).collect();
-
-        multi(&mut aval, idx);
-
-        multi(&mut aval, (0..511).collect())
-    }
-
-    #[test]
-    #[should_panic]
-    fn overflow() {
-        let mut aval = Availability::default();
-        single(&mut aval, 512);
-    }
-
-    #[test]
-    fn pin_point() {
-        let mut aval = Availability::default();
-
-        aval.set_available(438, true);
-
-        aval.set_available(479, true);
-
-        assert_eq!(aval.0[3], 1 << (438 - 384) | 1 << (479 - 384));
-    }
+/// This function defines errors that are per-connection; if we get this error from the `accept()`
+/// system call it means the next connection might be ready to be accepted.
+///
+/// All other errors will incur a timeout before next `accept()` call is attempted. The timeout is
+/// useful to handle resource exhaustion errors like `ENFILE` and `EMFILE`. Otherwise, it could
+/// enter into a temporary spin loop.
+fn connection_error(e: &io::Error) -> bool {
+    e.kind() == io::ErrorKind::ConnectionRefused
+        || e.kind() == io::ErrorKind::ConnectionAborted
+        || e.kind() == io::ErrorKind::ConnectionReset
 }

actix-server/src/availability.rs

@@ -0,0 +1,121 @@
+use crate::worker::WorkerHandleAccept;
+
+/// Array of u128 with every bit as marker for a worker handle's availability.
+#[derive(Debug, Default)]
+pub(crate) struct Availability([u128; 4]);
+
+impl Availability {
+    /// Check if any worker handle is available
+    #[inline(always)]
+    pub(crate) fn available(&self) -> bool {
+        self.0.iter().any(|a| *a != 0)
+    }
+
+    /// Check if worker handle is available by index
+    #[inline(always)]
+    pub(crate) fn get_available(&self, idx: usize) -> bool {
+        let (offset, idx) = Self::offset(idx);
+
+        self.0[offset] & (1 << idx as u128) != 0
+    }
+
+    /// Set worker handle available state by index.
+    pub(crate) fn set_available(&mut self, idx: usize, avail: bool) {
+        let (offset, idx) = Self::offset(idx);
+
+        let off = 1 << idx as u128;
+        if avail {
+            self.0[offset] |= off;
+        } else {
+            self.0[offset] &= !off
+        }
+    }
+
+    /// Set all worker handle to available state.
+    /// This would result in a re-check on all workers' availability.
+    pub(crate) fn set_available_all(&mut self, handles: &[WorkerHandleAccept]) {
+        handles.iter().for_each(|handle| {
+            self.set_available(handle.idx(), true);
+        })
+    }
+
+    /// Get offset and adjusted index of given worker handle index.
+    pub(crate) fn offset(idx: usize) -> (usize, usize) {
+        if idx < 128 {
+            (0, idx)
+        } else if idx < 128 * 2 {
+            (1, idx - 128)
+        } else if idx < 128 * 3 {
+            (2, idx - 128 * 2)
+        } else if idx < 128 * 4 {
+            (3, idx - 128 * 3)
+        } else {
+            panic!("Max WorkerHandle count is 512")
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn single(aval: &mut Availability, idx: usize) {
+        aval.set_available(idx, true);
+        assert!(aval.available());
+
+        aval.set_available(idx, true);
+
+        aval.set_available(idx, false);
+        assert!(!aval.available());
+
+        aval.set_available(idx, false);
+        assert!(!aval.available());
+    }
+
+    fn multi(aval: &mut Availability, mut idx: Vec<usize>) {
+        idx.iter().for_each(|idx| aval.set_available(*idx, true));
+
+        assert!(aval.available());
+
+        while let Some(idx) = idx.pop() {
+            assert!(aval.available());
+            aval.set_available(idx, false);
+        }
+
+        assert!(!aval.available());
+    }
+
+    #[test]
+    fn availability() {
+        let mut aval = Availability::default();
+
+        single(&mut aval, 1);
+        single(&mut aval, 128);
+        single(&mut aval, 256);
+        single(&mut aval, 511);
+
+        let idx = (0..511).filter(|i| i % 3 == 0 && i % 5 == 0).collect();
+
+        multi(&mut aval, idx);
+
+        multi(&mut aval, (0..511).collect())
+    }
+
+    #[test]
+    #[should_panic]
+    fn overflow() {
+        let mut aval = Availability::default();
+        single(&mut aval, 512);
+    }
+
+    #[test]
+    fn pin_point() {
+        let mut aval = Availability::default();
+
+        aval.set_available(438, true);
+
+        aval.set_available(479, true);
+
+        assert_eq!(aval.0[3], 1 << (438 - 384) | 1 << (479 - 384));
+    }
+}

actix-server/src/builder.rs

@@ -1,43 +1,31 @@
-use std::{
-    future::Future,
-    io, mem,
-    pin::Pin,
-    task::{Context, Poll},
-    time::Duration,
+use std::{io, time::Duration};
+
+use actix_rt::net::TcpStream;
+use log::{info, trace};
+use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender};
+
+use crate::{
+    server::ServerCommand,
+    service::{InternalServiceFactory, ServiceFactory, StreamNewService},
+    socket::{
+        create_mio_tcp_listener, MioListener, MioTcpListener, StdTcpListener, ToSocketAddrs,
+    },
+    worker::ServerWorkerConfig,
+    Server,
 };
 
-use actix_rt::{self as rt, net::TcpStream, time::sleep, System};
-use log::{error, info};
-use tokio::sync::{
-    mpsc::{unbounded_channel, UnboundedReceiver},
-    oneshot,
-};
-
-use crate::accept::AcceptLoop;
-use crate::join_all;
-use crate::server::{Server, ServerCommand};
-use crate::service::{InternalServiceFactory, ServiceFactory, StreamNewService};
-use crate::signals::{Signal, Signals};
-use crate::socket::{MioListener, StdSocketAddr, StdTcpListener, ToSocketAddrs};
-use crate::socket::{MioTcpListener, MioTcpSocket};
-use crate::waker_queue::{WakerInterest, WakerQueue};
-use crate::worker::{ServerWorker, ServerWorkerConfig, WorkerHandleAccept, WorkerHandleServer};
-
-/// Server builder
+/// [Server] builder.
 pub struct ServerBuilder {
-    threads: usize,
-    token: usize,
-    backlog: u32,
-    handles: Vec<(usize, WorkerHandleServer)>,
-    services: Vec<Box<dyn InternalServiceFactory>>,
-    sockets: Vec<(usize, String, MioListener)>,
-    accept: AcceptLoop,
-    exit: bool,
-    no_signals: bool,
-    cmd: UnboundedReceiver<ServerCommand>,
-    server: Server,
-    notify: Vec<oneshot::Sender<()>>,
-    worker_config: ServerWorkerConfig,
+    pub(crate) threads: usize,
+    pub(crate) token: usize,
+    pub(crate) backlog: u32,
+    pub(crate) factories: Vec<Box<dyn InternalServiceFactory>>,
+    pub(crate) sockets: Vec<(usize, String, MioListener)>,
+    pub(crate) exit: bool,
+    pub(crate) listen_os_signals: bool,
+    pub(crate) cmd_tx: UnboundedSender<ServerCommand>,
+    pub(crate) cmd_rx: UnboundedReceiver<ServerCommand>,
+    pub(crate) worker_config: ServerWorkerConfig,
 }
 
 impl Default for ServerBuilder {
@@ -49,30 +37,26 @@ impl Default for ServerBuilder {
 impl ServerBuilder {
     /// Create new Server builder instance
     pub fn new() -> ServerBuilder {
-        let (tx, rx) = unbounded_channel();
-        let server = Server::new(tx);
+        let (cmd_tx, cmd_rx) = unbounded_channel();
 
         ServerBuilder {
             threads: num_cpus::get(),
             token: 0,
-            handles: Vec::new(),
-            services: Vec::new(),
+            factories: Vec::new(),
             sockets: Vec::new(),
-            accept: AcceptLoop::new(server.clone()),
             backlog: 2048,
             exit: false,
-            no_signals: false,
-            cmd: rx,
-            notify: Vec::new(),
-            server,
+            listen_os_signals: true,
+            cmd_tx,
+            cmd_rx,
             worker_config: ServerWorkerConfig::default(),
         }
     }
 
     /// Set number of workers to start.
     ///
-    /// By default server uses number of available logical cpu as workers
-    /// count. Workers must be greater than 0.
+    /// By default server uses number of available logical CPU as workers count. Workers must be
+    /// greater than 0.
     pub fn workers(mut self, num: usize) -> Self {
         assert_ne!(num, 0, "workers must be greater than 0");
         self.threads = num;
@@ -99,10 +83,9 @@ impl ServerBuilder {
 
     /// Set the maximum number of pending connections.
     ///
-    /// This refers to the number of clients that can be waiting to be served.
-    /// Exceeding this number results in the client getting an error when
-    /// attempting to connect. It should only affect servers under significant
-    /// load.
+    /// This refers to the number of clients that can be waiting to be served. Exceeding this number
+    /// results in the client getting an error when attempting to connect. It should only affect
+    /// servers under significant load.
     ///
     /// Generally set in the 64-2048 range. Default value is 2048.
     ///
@@ -114,24 +97,30 @@ impl ServerBuilder {
 
     /// Sets the maximum per-worker number of concurrent connections.
     ///
-    /// All socket listeners will stop accepting connections when this limit is
-    /// reached for each worker.
+    /// All socket listeners will stop accepting connections when this limit is reached for
+    /// each worker.
     ///
     /// By default max connections is set to a 25k per worker.
-    pub fn maxconn(mut self, num: usize) -> Self {
+    pub fn max_concurrent_connections(mut self, num: usize) -> Self {
         self.worker_config.max_concurrent_connections(num);
         self
     }
 
-    /// Stop Actix system.
+    #[doc(hidden)]
+    #[deprecated(since = "2.0.0", note = "Renamed to `max_concurrent_connections`.")]
+    pub fn maxconn(self, num: usize) -> Self {
+        self.max_concurrent_connections(num)
+    }
+
+    /// Stop Actix `System` after server shutdown.
     pub fn system_exit(mut self) -> Self {
         self.exit = true;
         self
     }
 
-    /// Disable signal handling.
+    /// Disable OS signal handling.
     pub fn disable_signals(mut self) -> Self {
-        self.no_signals = true;
+        self.listen_os_signals = false;
         self
     }
 
@@ -155,9 +144,11 @@ impl ServerBuilder {
     {
         let sockets = bind_addr(addr, self.backlog)?;
 
+        trace!("binding server to: {:?}", &sockets);
+
         for lst in sockets {
             let token = self.next_token();
-            self.services.push(StreamNewService::create(
+            self.factories.push(StreamNewService::create(
                 name.as_ref().to_string(),
                 token,
                 factory.clone(),
@@ -166,11 +157,57 @@ impl ServerBuilder {
             self.sockets
                 .push((token, name.as_ref().to_string(), MioListener::Tcp(lst)));
         }
+
         Ok(self)
     }
 
-    /// Add new unix domain service to the server.
+    /// Add new service to the server.
+    pub fn listen<F, N: AsRef<str>>(
+        mut self,
+        name: N,
+        lst: StdTcpListener,
+        factory: F,
+    ) -> io::Result<Self>
+    where
+        F: ServiceFactory<TcpStream>,
+    {
+        lst.set_nonblocking(true)?;
+        let addr = lst.local_addr()?;
+
+        let token = self.next_token();
+        self.factories.push(StreamNewService::create(
+            name.as_ref().to_string(),
+            token,
+            factory,
+            addr,
+        ));
+
+        self.sockets
+            .push((token, name.as_ref().to_string(), MioListener::from(lst)));
+
+        Ok(self)
+    }
+
+    /// Starts processing incoming connections and return server controller.
+    pub fn run(self) -> Server {
+        if self.sockets.is_empty() {
+            panic!("Server should have at least one bound socket");
+        } else {
+            info!("Starting {} workers", self.threads);
+            Server::new(self)
+        }
+    }
+
+    fn next_token(&mut self) -> usize {
+        let token = self.token;
+        self.token += 1;
+        token
+    }
+}
+
 #[cfg(unix)]
+impl ServerBuilder {
+    /// Add new unix domain service to the server.
     pub fn bind_uds<F, U, N>(self, name: N, addr: U, factory: F) -> io::Result<Self>
     where
         F: ServiceFactory<actix_rt::net::UnixStream>,
@@ -191,9 +228,8 @@ impl ServerBuilder {
     }
 
     /// Add new unix domain service to the server.
-    /// Useful when running as a systemd service and
-    /// a socket FD can be acquired using the systemd crate.
-    #[cfg(unix)]
+    ///
+    /// Useful when running as a systemd service and a socket FD is acquired externally.
     pub fn listen_uds<F, N: AsRef<str>>(
         mut self,
         name: N,
@@ -206,8 +242,9 @@ impl ServerBuilder {
         use std::net::{IpAddr, Ipv4Addr};
         lst.set_nonblocking(true)?;
         let token = self.next_token();
-        let addr = StdSocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
-        self.services.push(StreamNewService::create(
+        let addr =
+            crate::socket::StdSocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
+        self.factories.push(StreamNewService::create(
             name.as_ref().to_string(),
             token,
             factory,
@@ -217,219 +254,6 @@ impl ServerBuilder {
             .push((token, name.as_ref().to_string(), MioListener::from(lst)));
         Ok(self)
     }
-
-    /// Add new service to the server.
-    pub fn listen<F, N: AsRef<str>>(
-        mut self,
-        name: N,
-        lst: StdTcpListener,
-        factory: F,
-    ) -> io::Result<Self>
-    where
-        F: ServiceFactory<TcpStream>,
-    {
-        lst.set_nonblocking(true)?;
-        let addr = lst.local_addr()?;
-
-        let token = self.next_token();
-        self.services.push(StreamNewService::create(
-            name.as_ref().to_string(),
-            token,
-            factory,
-            addr,
-        ));
-
-        self.sockets
-            .push((token, name.as_ref().to_string(), MioListener::from(lst)));
-
-        Ok(self)
-    }
-
-    /// Starts processing incoming connections and return server controller.
-    pub fn run(mut self) -> Server {
-        if self.sockets.is_empty() {
-            panic!("Server should have at least one bound socket");
-        } else {
-            info!("Starting {} workers", self.threads);
-
-            // start workers
-            let handles = (0..self.threads)
-                .map(|idx| {
-                    let (handle_accept, handle_server) =
-                        self.start_worker(idx, self.accept.waker_owned());
-                    self.handles.push((idx, handle_server));
-
-                    handle_accept
-                })
-                .collect();
-
-            // start accept thread
-            for sock in &self.sockets {
-                info!("Starting \"{}\" service on {}", sock.1, sock.2);
-            }
-            self.accept.start(
-                mem::take(&mut self.sockets)
-                    .into_iter()
-                    .map(|t| (t.0, t.2))
-                    .collect(),
-                handles,
-            );
-
-            // handle signals
-            if !self.no_signals {
-                Signals::start(self.server.clone());
-            }
-
-            // start http server actor
-            let server = self.server.clone();
-            rt::spawn(self);
-            server
-        }
-    }
-
-    fn start_worker(
-        &self,
-        idx: usize,
-        waker_queue: WakerQueue,
-    ) -> (WorkerHandleAccept, WorkerHandleServer) {
-        let services = self.services.iter().map(|v| v.clone_factory()).collect();
-
-        ServerWorker::start(idx, services, waker_queue, self.worker_config)
-    }
-
-    fn handle_cmd(&mut self, item: ServerCommand) {
-        match item {
-            ServerCommand::Pause(tx) => {
-                self.accept.wake(WakerInterest::Pause);
-                let _ = tx.send(());
-            }
-            ServerCommand::Resume(tx) => {
-                self.accept.wake(WakerInterest::Resume);
-                let _ = tx.send(());
-            }
-            ServerCommand::Signal(sig) => {
-                // Signals support
-                // Handle `SIGINT`, `SIGTERM`, `SIGQUIT` signals and stop actix system
-                match sig {
-                    Signal::Int => {
-                        info!("SIGINT received, starting forced shutdown");
-                        self.exit = true;
-                        self.handle_cmd(ServerCommand::Stop {
-                            graceful: false,
-                            completion: None,
-                        })
-                    }
-
-                    Signal::Term => {
-                        info!("SIGTERM received, starting graceful shutdown");
-                        self.exit = true;
-                        self.handle_cmd(ServerCommand::Stop {
-                            graceful: true,
-                            completion: None,
-                        })
-                    }
-
-                    Signal::Quit => {
-                        info!("SIGQUIT received, starting forced shutdown");
-                        self.exit = true;
-                        self.handle_cmd(ServerCommand::Stop {
-                            graceful: false,
-                            completion: None,
-                        })
-                    }
-                }
-            }
-            ServerCommand::Notify(tx) => {
-                self.notify.push(tx);
-            }
-            ServerCommand::Stop {
-                graceful,
-                completion,
-            } => {
-                let exit = self.exit;
-
-                // stop accept thread
-                self.accept.wake(WakerInterest::Stop);
-                let notify = std::mem::take(&mut self.notify);
-
-                // stop workers
-                let stop = self
-                    .handles
-                    .iter()
-                    .map(move |worker| worker.1.stop(graceful))
-                    .collect();
-
-                rt::spawn(async move {
-                    if graceful {
-                        // wait for all workers to shut down
-                        let _ = join_all(stop).await;
-                    }
-
-                    if let Some(tx) = completion {
-                        let _ = tx.send(());
-                    }
-
-                    for tx in notify {
-                        let _ = tx.send(());
-                    }
-
-                    if exit {
-                        sleep(Duration::from_millis(300)).await;
-                        System::current().stop();
-                    }
-                });
-            }
-            ServerCommand::WorkerFaulted(idx) => {
-                let mut found = false;
-                for i in 0..self.handles.len() {
-                    if self.handles[i].0 == idx {
-                        self.handles.swap_remove(i);
-                        found = true;
-                        break;
-                    }
-                }
-
-                if found {
-                    error!("Worker has died {:?}, restarting", idx);
-
-                    let mut new_idx = self.handles.len();
-                    'found: loop {
-                        for i in 0..self.handles.len() {
-                            if self.handles[i].0 == new_idx {
-                                new_idx += 1;
-                                continue 'found;
-                            }
-                        }
-                        break;
-                    }
-
-                    let (handle_accept, handle_server) =
-                        self.start_worker(new_idx, self.accept.waker_owned());
-                    self.handles.push((new_idx, handle_server));
-                    self.accept.wake(WakerInterest::Worker(handle_accept));
-                }
-            }
-        }
-    }
-
-    fn next_token(&mut self) -> usize {
-        let token = self.token;
-        self.token += 1;
-        token
-    }
-}
-
-impl Future for ServerBuilder {
-    type Output = ();
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        loop {
-            match Pin::new(&mut self.cmd).poll_recv(cx) {
-                Poll::Ready(Some(it)) => self.as_mut().get_mut().handle_cmd(it),
-                _ => return Poll::Pending,
-            }
-        }
-    }
 }
 
 pub(super) fn bind_addr<S: ToSocketAddrs>(
@@ -437,39 +261,26 @@ pub(super) fn bind_addr<S: ToSocketAddrs>(
     backlog: u32,
 ) -> io::Result<Vec<MioTcpListener>> {
     let mut err = None;
-    let mut succ = false;
+    let mut success = false;
     let mut sockets = Vec::new();
     for addr in addr.to_socket_addrs()? {
-        match create_tcp_listener(addr, backlog) {
+        match create_mio_tcp_listener(addr, backlog) {
             Ok(lst) => {
-                succ = true;
+                success = true;
                 sockets.push(lst);
             }
             Err(e) => err = Some(e),
         }
     }
 
-    if !succ {
-        if let Some(e) = err.take() {
-            Err(e)
+    if success {
+        Ok(sockets)
+    } else if let Some(err) = err.take() {
+        Err(err)
     } else {
         Err(io::Error::new(
             io::ErrorKind::Other,
             "Can not bind to address.",
         ))
     }
-    } else {
-        Ok(sockets)
-    }
-}
-
-fn create_tcp_listener(addr: StdSocketAddr, backlog: u32) -> io::Result<MioTcpListener> {
-    let socket = match addr {
-        StdSocketAddr::V4(_) => MioTcpSocket::new_v4()?,
-        StdSocketAddr::V6(_) => MioTcpSocket::new_v6()?,
-    };
-
-    socket.set_reuseaddr(true)?;
-    socket.bind(addr)?;
-    socket.listen(backlog)
 }

actix-server/src/handle.rs

@@ -0,0 +1,55 @@
+use std::future::Future;
+
+use tokio::sync::{mpsc::UnboundedSender, oneshot};
+
+use crate::server::ServerCommand;
+
+/// Server handle.
+#[derive(Debug, Clone)]
+pub struct ServerHandle {
+    cmd_tx: UnboundedSender<ServerCommand>,
+}
+
+impl ServerHandle {
+    pub(crate) fn new(cmd_tx: UnboundedSender<ServerCommand>) -> Self {
+        ServerHandle { cmd_tx }
+    }
+
+    pub(crate) fn worker_faulted(&self, idx: usize) {
+        let _ = self.cmd_tx.send(ServerCommand::WorkerFaulted(idx));
+    }
+
+    /// Pause accepting incoming connections.
+    ///
+    /// May drop socket pending connection. All open connections remain active.
+    pub fn pause(&self) -> impl Future<Output = ()> {
+        let (tx, rx) = oneshot::channel();
+        let _ = self.cmd_tx.send(ServerCommand::Pause(tx));
+        async {
+            let _ = rx.await;
+        }
+    }
+
+    /// Resume accepting incoming connections.
+    pub fn resume(&self) -> impl Future<Output = ()> {
+        let (tx, rx) = oneshot::channel();
+        let _ = self.cmd_tx.send(ServerCommand::Resume(tx));
+        async {
+            let _ = rx.await;
+        }
+    }
+
+    /// Stop incoming connection processing, stop all workers and exit.
+    pub fn stop(&self, graceful: bool) -> impl Future<Output = ()> {
+        let (tx, rx) = oneshot::channel();
+
+        let _ = self.cmd_tx.send(ServerCommand::Stop {
+            graceful,
+            completion: Some(tx),
+        });
+
+        async {
+            let _ = rx.await;
+        }
+    }
+}

actix-server/src/join_all.rs

@@ -0,0 +1,78 @@
+use std::{
+    future::Future,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use futures_core::future::BoxFuture;
+
+// a poor man's join future. joined future is only used when starting/stopping the server.
+// pin_project and pinned futures are overkill for this task.
+pub(crate) struct JoinAll<T> {
+    fut: Vec<JoinFuture<T>>,
+}
+
+pub(crate) fn join_all<T>(fut: Vec<impl Future<Output = T> + Send + 'static>) -> JoinAll<T> {
+    let fut = fut
+        .into_iter()
+        .map(|f| JoinFuture::Future(Box::pin(f)))
+        .collect();
+
+    JoinAll { fut }
+}
+
+enum JoinFuture<T> {
+    Future(BoxFuture<'static, T>),
+    Result(Option<T>),
+}
+
+impl<T> Unpin for JoinAll<T> {}
+
+impl<T> Future for JoinAll<T> {
+    type Output = Vec<T>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let mut ready = true;
+
+        let this = self.get_mut();
+        for fut in this.fut.iter_mut() {
+            if let JoinFuture::Future(f) = fut {
+                match f.as_mut().poll(cx) {
+                    Poll::Ready(t) => {
+                        *fut = JoinFuture::Result(Some(t));
+                    }
+                    Poll::Pending => ready = false,
+                }
+            }
+        }
+
+        if ready {
+            let mut res = Vec::new();
+            for fut in this.fut.iter_mut() {
+                if let JoinFuture::Result(f) = fut {
+                    res.push(f.take().unwrap());
+                }
+            }
+
+            Poll::Ready(res)
+        } else {
+            Poll::Pending
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    use actix_utils::future::ready;
+
+    #[actix_rt::test]
+    async fn test_join_all() {
+        let futs = vec![ready(Ok(1)), ready(Err(3)), ready(Ok(9))];
+        let mut res = join_all(futs).await.into_iter();
+        assert_eq!(Ok(1), res.next().unwrap());
+        assert_eq!(Err(3), res.next().unwrap());
+        assert_eq!(Ok(9), res.next().unwrap());
+    }
+}

actix-server/src/lib.rs

@@ -5,7 +5,10 @@
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
 mod accept;
+mod availability;
 mod builder;
+mod handle;
+mod join_all;
 mod server;
 mod service;
 mod signals;
@@ -15,6 +18,7 @@ mod waker_queue;
 mod worker;
 
 pub use self::builder::ServerBuilder;
+pub use self::handle::ServerHandle;
 pub use self::server::Server;
 pub use self::service::ServiceFactory;
 pub use self::test_server::TestServer;
@@ -22,82 +26,9 @@ pub use self::test_server::TestServer;
 #[doc(hidden)]
 pub use self::socket::FromStream;
 
-use std::future::Future;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-
 /// Start server building process
+#[doc(hidden)]
+#[deprecated(since = "2.0.0", note = "Use `Server::build()`.")]
 pub fn new() -> ServerBuilder {
     ServerBuilder::default()
 }
-
-// a poor man's join future. joined future is only used when starting/stopping the server.
-// pin_project and pinned futures are overkill for this task.
-pub(crate) struct JoinAll<T> {
-    fut: Vec<JoinFuture<T>>,
-}
-
-pub(crate) fn join_all<T>(fut: Vec<impl Future<Output = T> + 'static>) -> JoinAll<T> {
-    let fut = fut
-        .into_iter()
-        .map(|f| JoinFuture::Future(Box::pin(f)))
-        .collect();
-
-    JoinAll { fut }
-}
-
-enum JoinFuture<T> {
-    Future(Pin<Box<dyn Future<Output = T>>>),
-    Result(Option<T>),
-}
-
-impl<T> Unpin for JoinAll<T> {}
-
-impl<T> Future for JoinAll<T> {
-    type Output = Vec<T>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let mut ready = true;
-
-        let this = self.get_mut();
-        for fut in this.fut.iter_mut() {
-            if let JoinFuture::Future(f) = fut {
-                match f.as_mut().poll(cx) {
-                    Poll::Ready(t) => {
-                        *fut = JoinFuture::Result(Some(t));
-                    }
-                    Poll::Pending => ready = false,
-                }
-            }
-        }
-
-        if ready {
-            let mut res = Vec::new();
-            for fut in this.fut.iter_mut() {
-                if let JoinFuture::Result(f) = fut {
-                    res.push(f.take().unwrap());
-                }
-            }
-
-            Poll::Ready(res)
-        } else {
-            Poll::Pending
-        }
-    }
-}
-
-#[cfg(test)]
-mod test {
-    use super::*;
-
-    use actix_utils::future::ready;
-
-    #[actix_rt::test]
-    async fn test_join_all() {
-        let futs = vec![ready(Ok(1)), ready(Err(3)), ready(Ok(9))];
-        let mut res = join_all(futs).await.into_iter();
-        assert_eq!(Ok(1), res.next().unwrap());
-        assert_eq!(Err(3), res.next().unwrap());
-        assert_eq!(Ok(9), res.next().unwrap());
-    }
-}

actix-server/src/server.rs

@@ -1,119 +1,363 @@
-use std::future::Future;
-use std::io;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use std::{
+    future::Future,
+    io, mem,
+    pin::Pin,
+    task::{Context, Poll},
+    time::Duration,
+};
 
-use tokio::sync::mpsc::UnboundedSender;
-use tokio::sync::oneshot;
+use actix_rt::{time::sleep, System};
+use futures_core::future::BoxFuture;
+use log::{error, info};
+use tokio::sync::{
+    mpsc::{UnboundedReceiver, UnboundedSender},
+    oneshot,
+};
 
-use crate::builder::ServerBuilder;
-use crate::signals::Signal;
+use crate::{
+    accept::Accept,
+    builder::ServerBuilder,
+    join_all::join_all,
+    service::InternalServiceFactory,
+    signals::{SignalKind, Signals},
+    waker_queue::{WakerInterest, WakerQueue},
+    worker::{ServerWorker, ServerWorkerConfig, WorkerHandleServer},
+    ServerHandle,
+};
 
 #[derive(Debug)]
 pub(crate) enum ServerCommand {
+    /// Worker failed to accept connection, indicating a probable panic.
+    ///
+    /// Contains index of faulted worker.
     WorkerFaulted(usize),
+
+    /// Pause accepting connections.
+    ///
+    /// Contains return channel to notify caller of successful state change.
     Pause(oneshot::Sender<()>),
+
+    /// Resume accepting connections.
+    ///
+    /// Contains return channel to notify caller of successful state change.
     Resume(oneshot::Sender<()>),
-    Signal(Signal),
+
+    /// Stop accepting connections and begin shutdown procedure.
     Stop {
         /// True if shut down should be graceful.
         graceful: bool,
+
+        /// Return channel to notify caller that shutdown is complete.
         completion: Option<oneshot::Sender<()>>,
     },
-    /// Notify of server stop
-    Notify(oneshot::Sender<()>),
 }
 
-/// Server handle.
+/// General purpose TCP server that runs services receiving Tokio `TcpStream`s.
+///
+/// Handles creating worker threads, restarting faulted workers, connection accepting, and
+/// back-pressure logic.
+///
+/// Creates a worker per CPU core (or the number specified in [`ServerBuilder::workers`]) and
+/// distributes connections with a round-robin strategy.
+///
+/// The [Server] must be awaited to process stop commands and listen for OS signals. It will resolve
+/// when the server has fully shut down.
 ///
 /// # Shutdown Signals
 /// On UNIX systems, `SIGQUIT` will start a graceful shutdown and `SIGTERM` or `SIGINT` will start a
-/// forced shutdown. On Windows, a CTRL-C signal will start a forced shutdown.
+/// forced shutdown. On Windows, a Ctrl-C signal will start a forced shutdown.
 ///
 /// A graceful shutdown will wait for all workers to stop first.
-#[derive(Debug)]
-pub struct Server(
-    UnboundedSender<ServerCommand>,
-    Option<oneshot::Receiver<()>>,
-);
-
-impl Server {
-    pub(crate) fn new(tx: UnboundedSender<ServerCommand>) -> Self {
-        Server(tx, None)
+///
+/// # Examples
+/// The following is a TCP echo server. Test using `telnet 127.0.0.1 8080`.
+///
+/// ```no_run
+/// use std::io;
+///
+/// use actix_rt::net::TcpStream;
+/// use actix_server::Server;
+/// use actix_service::{fn_service, ServiceFactoryExt as _};
+/// use bytes::BytesMut;
+/// use tokio::io::{AsyncReadExt as _, AsyncWriteExt as _};
+///
+/// #[actix_rt::main]
+/// async fn main() -> io::Result<()> {
+///     let bind_addr = ("127.0.0.1", 8080);
+///
+///     Server::build()
+///         .bind("echo", bind_addr, move || {
+///             fn_service(move |mut stream: TcpStream| {
+///                 async move {
+///                     let mut size = 0;
+///                     let mut buf = BytesMut::new();
+///
+///                     loop {
+///                         match stream.read_buf(&mut buf).await {
+///                             // end of stream; bail from loop
+///                             Ok(0) => break,
+///
+///                             // write bytes back to stream
+///                             Ok(bytes_read) => {
+///                                 stream.write_all(&buf[size..]).await.unwrap();
+///                                 size += bytes_read;
+///                             }
+///
+///                             Err(err) => {
+///                                 eprintln!("Stream Error: {:?}", err);
+///                                 return Err(());
+///                             }
+///                         }
+///                     }
+///
+///                     Ok(())
+///                 }
+///             })
+///             .map_err(|err| eprintln!("Service Error: {:?}", err))
+///         })?
+///         .run()
+///         .await
+/// }
+/// ```
+#[must_use = "futures do nothing unless you `.await` or poll them"]
+pub enum Server {
+    Server(ServerInner),
+    Error(Option<io::Error>),
 }
 
-    /// Start server building process
+impl Server {
+    /// Create server build.
     pub fn build() -> ServerBuilder {
         ServerBuilder::default()
     }
 
-    pub(crate) fn signal(&self, sig: Signal) {
-        let _ = self.0.send(ServerCommand::Signal(sig));
+    pub(crate) fn new(mut builder: ServerBuilder) -> Self {
+        let sockets = mem::take(&mut builder.sockets)
+            .into_iter()
+            .map(|t| (t.0, t.2))
+            .collect();
+
+        // Give log information on what runtime will be used.
+        let is_actix = actix_rt::System::try_current().is_some();
+        let is_tokio = tokio::runtime::Handle::try_current().is_ok();
+
+        match (is_actix, is_tokio) {
+            (true, _) => info!("Actix runtime found; starting in Actix runtime"),
+            (_, true) => info!("Tokio runtime found; starting in existing Tokio runtime"),
+            (_, false) => panic!("Actix or Tokio runtime not found; halting"),
         }
 
-    pub(crate) fn worker_faulted(&self, idx: usize) {
-        let _ = self.0.send(ServerCommand::WorkerFaulted(idx));
+        for (_, name, lst) in &builder.sockets {
+            info!(
+                r#"Starting service: "{}", workers: {}, listening on: {}"#,
+                name,
+                builder.threads,
+                lst.local_addr()
+            );
         }
 
-    /// Pause accepting incoming connections
+        match Accept::start(sockets, &builder) {
+            Ok((waker_queue, worker_handles)) => {
+                // construct OS signals listener future
+                let signals = (builder.listen_os_signals).then(Signals::new);
+
+                Self::Server(ServerInner {
+                    cmd_tx: builder.cmd_tx.clone(),
+                    cmd_rx: builder.cmd_rx,
+                    signals,
+                    waker_queue,
+                    worker_handles,
+                    worker_config: builder.worker_config,
+                    services: builder.factories,
+                    exit: builder.exit,
+                    stop_task: None,
+                })
+            }
+
+            Err(err) => Self::Error(Some(err)),
+        }
+    }
+
+    /// Get a handle for ServerFuture that can be used to change state of actix server.
     ///
-    /// If socket contains some pending connection, they might be dropped.
-    /// All opened connection remains active.
-    pub fn pause(&self) -> impl Future<Output = ()> {
-        let (tx, rx) = oneshot::channel();
-        let _ = self.0.send(ServerCommand::Pause(tx));
-        async {
-            let _ = rx.await;
+    /// See [ServerHandle](ServerHandle) for usage.
+    pub fn handle(&self) -> ServerHandle {
+        match self {
+            Server::Server(inner) => ServerHandle::new(inner.cmd_tx.clone()),
+            Server::Error(err) => {
+                // TODO: i don't think this is the best way to handle server startup fail
+                panic!(
+                    "server handle can not be obtained because server failed to start up: {}",
+                    err.as_ref().unwrap()
+                );
             }
         }
-
-    /// Resume accepting incoming connections
-    pub fn resume(&self) -> impl Future<Output = ()> {
-        let (tx, rx) = oneshot::channel();
-        let _ = self.0.send(ServerCommand::Resume(tx));
-        async {
-            let _ = rx.await;
-        }
-    }
-
-    /// Stop incoming connection processing, stop all workers and exit.
-    ///
-    /// If server starts with `spawn()` method, then spawned thread get terminated.
-    pub fn stop(&self, graceful: bool) -> impl Future<Output = ()> {
-        let (tx, rx) = oneshot::channel();
-        let _ = self.0.send(ServerCommand::Stop {
-            graceful,
-            completion: Some(tx),
-        });
-        async {
-            let _ = rx.await;
-        }
-    }
-}
-
-impl Clone for Server {
-    fn clone(&self) -> Self {
-        Self(self.0.clone(), None)
     }
 }
 
 impl Future for Server {
     type Output = io::Result<()>;
 
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.get_mut();
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        match self.as_mut().get_mut() {
+            Self::Error(err) => Poll::Ready(Err(err
+                .take()
+                .expect("Server future cannot be polled after error"))),
 
-        if this.1.is_none() {
-            let (tx, rx) = oneshot::channel();
-            if this.0.send(ServerCommand::Notify(tx)).is_err() {
-                return Poll::Ready(Ok(()));
+            Self::Server(inner) => {
+                // poll Signals
+                if let Some(ref mut signals) = inner.signals {
+                    if let Poll::Ready(signal) = Pin::new(signals).poll(cx) {
+                        inner.stop_task = inner.handle_signal(signal);
+                        // drop signals listener
+                        inner.signals = None;
                     }
-            this.1 = Some(rx);
                 }
 
-        match Pin::new(this.1.as_mut().unwrap()).poll(cx) {
-            Poll::Pending => Poll::Pending,
-            Poll::Ready(_) => Poll::Ready(Ok(())),
+                // handle stop tasks and eager drain command channel
+                loop {
+                    if let Some(ref mut fut) = inner.stop_task {
+                        // only resolve stop task and exit
+                        return fut.as_mut().poll(cx).map(|_| Ok(()));
+                    }
+
+                    match Pin::new(&mut inner.cmd_rx).poll_recv(cx) {
+                        Poll::Ready(Some(cmd)) => {
+                            // if stop task is required, set it and loop
+                            inner.stop_task = inner.handle_cmd(cmd);
+                        }
+                        _ => return Poll::Pending,
+                    }
+                }
+            }
+        }
+    }
+}
+
+pub struct ServerInner {
+    worker_handles: Vec<WorkerHandleServer>,
+    worker_config: ServerWorkerConfig,
+    services: Vec<Box<dyn InternalServiceFactory>>,
+    exit: bool,
+    cmd_tx: UnboundedSender<ServerCommand>,
+    cmd_rx: UnboundedReceiver<ServerCommand>,
+    signals: Option<Signals>,
+    waker_queue: WakerQueue,
+    stop_task: Option<BoxFuture<'static, ()>>,
+}
+
+impl ServerInner {
+    fn handle_cmd(&mut self, item: ServerCommand) -> Option<BoxFuture<'static, ()>> {
+        match item {
+            ServerCommand::Pause(tx) => {
+                self.waker_queue.wake(WakerInterest::Pause);
+                let _ = tx.send(());
+                None
+            }
+
+            ServerCommand::Resume(tx) => {
+                self.waker_queue.wake(WakerInterest::Resume);
+                let _ = tx.send(());
+                None
+            }
+
+            ServerCommand::Stop {
+                graceful,
+                completion,
+            } => {
+                let exit = self.exit;
+
+                // stop accept thread
+                self.waker_queue.wake(WakerInterest::Stop);
+
+                // stop workers
+                let workers_stop = self
+                    .worker_handles
+                    .iter()
+                    .map(|worker| worker.stop(graceful))
+                    .collect::<Vec<_>>();
+
+                Some(Box::pin(async move {
+                    if graceful {
+                        // wait for all workers to shut down
+                        let _ = join_all(workers_stop).await;
+                    }
+
+                    if let Some(tx) = completion {
+                        let _ = tx.send(());
+                    }
+
+                    if exit {
+                        sleep(Duration::from_millis(300)).await;
+                        System::try_current().as_ref().map(System::stop);
+                    }
+                }))
+            }
+
+            ServerCommand::WorkerFaulted(idx) => {
+                // TODO: maybe just return with warning log if not found ?
+                assert!(self.worker_handles.iter().any(|wrk| wrk.idx == idx));
+
+                error!("Worker {} has died; restarting", idx);
+
+                let factories = self
+                    .services
+                    .iter()
+                    .map(|service| service.clone_factory())
+                    .collect();
+
+                match ServerWorker::start(
+                    idx,
+                    factories,
+                    self.waker_queue.clone(),
+                    self.worker_config,
+                ) {
+                    Ok((handle_accept, handle_server)) => {
+                        *self
+                            .worker_handles
+                            .iter_mut()
+                            .find(|wrk| wrk.idx == idx)
+                            .unwrap() = handle_server;
+
+                        self.waker_queue.wake(WakerInterest::Worker(handle_accept));
+                    }
+
+                    Err(err) => error!("can not restart worker {}: {}", idx, err),
+                };
+
+                None
+            }
+        }
+    }
+
+    fn handle_signal(&mut self, signal: SignalKind) -> Option<BoxFuture<'static, ()>> {
+        match signal {
+            SignalKind::Int => {
+                info!("SIGINT received; starting forced shutdown");
+                self.exit = true;
+                self.handle_cmd(ServerCommand::Stop {
+                    graceful: false,
+                    completion: None,
+                })
+            }
+
+            SignalKind::Term => {
+                info!("SIGTERM received; starting graceful shutdown");
+                self.exit = true;
+                self.handle_cmd(ServerCommand::Stop {
+                    graceful: true,
+                    completion: None,
+                })
+            }
+
+            SignalKind::Quit => {
+                info!("SIGQUIT received; starting forced shutdown");
+                self.exit = true;
+                self.handle_cmd(ServerCommand::Stop {
+                    graceful: false,
+                    completion: None,
+                })
+            }
         }
     }
 }

actix-server/src/signals.rs

@@ -1,13 +1,17 @@
-use std::future::Future;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use std::{
+    fmt,
+    future::Future,
+    pin::Pin,
+    task::{Context, Poll},
+};
 
-use crate::server::Server;
+use log::trace;
 
 /// Types of process signals.
-#[allow(dead_code)]
-#[derive(PartialEq, Clone, Copy, Debug)]
-pub(crate) enum Signal {
+// #[allow(dead_code)]
+#[derive(Debug, Clone, Copy, PartialEq)]
+#[allow(dead_code)] // variants are never constructed on non-unix
+pub(crate) enum SignalKind {
     /// `SIGINT`
     Int,
 
@@ -18,26 +22,35 @@ pub(crate) enum Signal {
     Quit,
 }
 
+impl fmt::Display for SignalKind {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(match self {
+            SignalKind::Int => "SIGINT",
+            SignalKind::Term => "SIGTERM",
+            SignalKind::Quit => "SIGQUIT",
+        })
+    }
+}
+
 /// Process signal listener.
 pub(crate) struct Signals {
-    srv: Server,
-
     #[cfg(not(unix))]
-    signals: futures_core::future::LocalBoxFuture<'static, std::io::Result<()>>,
+    signals: futures_core::future::BoxFuture<'static, std::io::Result<()>>,
 
     #[cfg(unix)]
-    signals: Vec<(Signal, actix_rt::signal::unix::Signal)>,
+    signals: Vec<(SignalKind, actix_rt::signal::unix::Signal)>,
 }
 
 impl Signals {
-    /// Spawns a signal listening future that is able to send commands to the `Server`.
-    pub(crate) fn start(srv: Server) {
+    /// Constructs an OS signal listening future.
+    pub(crate) fn new() -> Self {
+        trace!("setting up OS signal listener");
+
         #[cfg(not(unix))]
         {
-            actix_rt::spawn(Signals {
-                srv,
+            Signals {
                 signals: Box::pin(actix_rt::signal::ctrl_c()),
-            });
+            }
         }
 
         #[cfg(unix)]
@@ -45,9 +58,9 @@ impl Signals {
             use actix_rt::signal::unix;
 
             let sig_map = [
-                (unix::SignalKind::interrupt(), Signal::Int),
-                (unix::SignalKind::terminate(), Signal::Term),
-                (unix::SignalKind::quit(), Signal::Quit),
+                (unix::SignalKind::interrupt(), SignalKind::Int),
+                (unix::SignalKind::terminate(), SignalKind::Term),
+                (unix::SignalKind::quit(), SignalKind::Quit),
             ];
 
             let signals = sig_map
@@ -66,33 +79,29 @@ impl Signals {
                 })
                 .collect::<Vec<_>>();
 
-            actix_rt::spawn(Signals { srv, signals });
+            Signals { signals }
         }
     }
 }
 
 impl Future for Signals {
-    type Output = ();
+    type Output = SignalKind;
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         #[cfg(not(unix))]
-        match self.signals.as_mut().poll(cx) {
-            Poll::Ready(_) => {
-                self.srv.signal(Signal::Int);
-                Poll::Ready(())
-            }
-            Poll::Pending => Poll::Pending,
+        {
+            self.signals.as_mut().poll(cx).map(|_| SignalKind::Int)
         }
 
         #[cfg(unix)]
         {
             for (sig, fut) in self.signals.iter_mut() {
                 if Pin::new(fut).poll_recv(cx).is_ready() {
-                    let sig = *sig;
-                    self.srv.signal(sig);
-                    return Poll::Ready(());
+                    trace!("{} received", sig);
+                    return Poll::Ready(*sig);
                 }
             }
+
             Poll::Pending
         }
     }

actix-server/src/socket.rs

@@ -2,7 +2,7 @@ pub(crate) use std::net::{
     SocketAddr as StdSocketAddr, TcpListener as StdTcpListener, ToSocketAddrs,
 };
 
-pub(crate) use mio::net::{TcpListener as MioTcpListener, TcpSocket as MioTcpSocket};
+pub(crate) use mio::net::TcpListener as MioTcpListener;
 #[cfg(unix)]
 pub(crate) use {
     mio::net::UnixListener as MioUnixListener,
@@ -159,24 +159,24 @@ pub enum MioStream {
     Uds(mio::net::UnixStream),
 }
 
-/// helper trait for converting mio stream to tokio stream.
+/// Helper trait for converting a Mio stream into a Tokio stream.
 pub trait FromStream: Sized {
     fn from_mio(sock: MioStream) -> io::Result<Self>;
 }
 
 #[cfg(windows)]
 mod win_impl {
-    use super::*;
-
     use std::os::windows::io::{FromRawSocket, IntoRawSocket};
 
-    // FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
+    use super::*;
+
+    // TODO: This is a workaround and we need an efficient way to convert between Mio and Tokio stream
     impl FromStream for TcpStream {
         fn from_mio(sock: MioStream) -> io::Result<Self> {
             match sock {
                 MioStream::Tcp(mio) => {
                     let raw = IntoRawSocket::into_raw_socket(mio);
-                    // SAFETY: This is a in place conversion from mio stream to tokio stream.
+                    // SAFETY: This is an in-place conversion from Mio stream to Tokio stream.
                     TcpStream::from_std(unsafe { FromRawSocket::from_raw_socket(raw) })
                 }
             }
@@ -186,19 +186,19 @@ mod win_impl {
 
 #[cfg(unix)]
 mod unix_impl {
-    use super::*;
-
     use std::os::unix::io::{FromRawFd, IntoRawFd};
 
     use actix_rt::net::UnixStream;
 
-    // FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
+    use super::*;
+
+    // HACK: This is a workaround and we need an efficient way to convert between Mio and Tokio stream
     impl FromStream for TcpStream {
         fn from_mio(sock: MioStream) -> io::Result<Self> {
             match sock {
                 MioStream::Tcp(mio) => {
                     let raw = IntoRawFd::into_raw_fd(mio);
-                    // SAFETY: This is a in place conversion from mio stream to tokio stream.
+                    // SAFETY: This is an in-place conversion from Mio stream to Tokio stream.
                     TcpStream::from_std(unsafe { FromRawFd::from_raw_fd(raw) })
                 }
                 MioStream::Uds(_) => {
@@ -208,14 +208,14 @@ mod unix_impl {
         }
     }
 
-    // FIXME: This is a workaround and we need an efficient way to convert between mio and tokio stream
+    // HACK: This is a workaround and we need an efficient way to convert between Mio and Tokio stream
     impl FromStream for UnixStream {
         fn from_mio(sock: MioStream) -> io::Result<Self> {
             match sock {
                 MioStream::Tcp(_) => panic!("Should not happen, bug in server impl"),
                 MioStream::Uds(mio) => {
                     let raw = IntoRawFd::into_raw_fd(mio);
-                    // SAFETY: This is a in place conversion from mio stream to tokio stream.
+                    // SAFETY: This is an in-place conversion from Mio stream to Tokio stream.
                     UnixStream::from_std(unsafe { FromRawFd::from_raw_fd(raw) })
                 }
             }
@@ -223,6 +223,22 @@ mod unix_impl {
     }
 }
 
+pub(crate) fn create_mio_tcp_listener(
+    addr: StdSocketAddr,
+    backlog: u32,
+) -> io::Result<MioTcpListener> {
+    use socket2::{Domain, Protocol, Socket, Type};
+
+    let socket = Socket::new(Domain::for_address(addr), Type::STREAM, Some(Protocol::TCP))?;
+
+    socket.set_reuse_address(true)?;
+    socket.set_nonblocking(true)?;
+    socket.bind(&addr.into())?;
+    socket.listen(backlog as i32)?;
+
+    Ok(MioTcpListener::from_std(StdTcpListener::from(socket)))
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -234,11 +250,8 @@ mod tests {
         assert_eq!(format!("{}", addr), "127.0.0.1:8080");
 
         let addr: StdSocketAddr = "127.0.0.1:0".parse().unwrap();
-        let socket = MioTcpSocket::new_v4().unwrap();
-        socket.set_reuseaddr(true).unwrap();
-        socket.bind(addr).unwrap();
-        let tcp = socket.listen(128).unwrap();
-        let lst = MioListener::Tcp(tcp);
+        let lst = create_mio_tcp_listener(addr, 128).unwrap();
+        let lst = MioListener::Tcp(lst);
         assert!(format!("{:?}", lst).contains("TcpListener"));
         assert!(format!("{}", lst).contains("127.0.0.1"));
     }

actix-server/src/test_server.rs

@@ -1,9 +1,8 @@
-use std::sync::mpsc;
-use std::{net, thread};
+use std::{io, net, sync::mpsc, thread};
 
 use actix_rt::{net::TcpStream, System};
 
-use crate::{Server, ServerBuilder, ServiceFactory};
+use crate::{Server, ServerBuilder, ServerHandle, ServiceFactory};
 
 /// A testing server.
 ///
@@ -34,7 +33,8 @@ pub struct TestServerRuntime {
     addr: net::SocketAddr,
     host: String,
     port: u16,
-    system: System,
+    server_handle: ServerHandle,
+    thread_handle: Option<thread::JoinHandle<io::Result<()>>>,
 }
 
 impl TestServer {
@@ -46,20 +46,22 @@ impl TestServer {
         let (tx, rx) = mpsc::channel();
 
         // run server in separate thread
-        thread::spawn(move || {
-            let sys = System::new();
-            factory(Server::build()).workers(1).disable_signals().run();
-
-            tx.send(System::current()).unwrap();
-            sys.run()
+        let thread_handle = thread::spawn(move || {
+            System::new().block_on(async {
+                let server = factory(Server::build()).workers(1).disable_signals().run();
+                tx.send(server.handle()).unwrap();
+                server.await
+            })
         });
-        let system = rx.recv().unwrap();
+
+        let server_handle = rx.recv().unwrap();
 
         TestServerRuntime {
-            system,
             addr: "127.0.0.1:0".parse().unwrap(),
             host: "127.0.0.1".to_string(),
             port: 0,
+            server_handle,
+            thread_handle: Some(thread_handle),
         }
     }
 
@@ -68,24 +70,25 @@ impl TestServer {
         let (tx, rx) = mpsc::channel();
 
         // run server in separate thread
-        thread::spawn(move || {
+        let thread_handle = thread::spawn(move || {
             let sys = System::new();
             let tcp = net::TcpListener::bind("127.0.0.1:0").unwrap();
             let local_addr = tcp.local_addr().unwrap();
 
             sys.block_on(async {
-                Server::build()
+                let server = Server::build()
                     .listen("test", tcp, factory)
                     .unwrap()
                     .workers(1)
                     .disable_signals()
                     .run();
-                tx.send((System::current(), local_addr)).unwrap();
-            });
-            sys.run()
+
+                tx.send((server.handle(), local_addr)).unwrap();
+                server.await
+            })
         });
 
-        let (system, addr) = rx.recv().unwrap();
+        let (server_handle, addr) = rx.recv().unwrap();
 
         let host = format!("{}", addr.ip());
         let port = addr.port();
@@ -94,18 +97,23 @@ impl TestServer {
             addr,
             host,
             port,
-            system,
+            server_handle,
+            thread_handle: Some(thread_handle),
         }
     }
 
     /// Get first available unused local address.
     pub fn unused_addr() -> net::SocketAddr {
+        use socket2::{Domain, Protocol, Socket, Type};
+
         let addr: net::SocketAddr = "127.0.0.1:0".parse().unwrap();
-        let socket = mio::net::TcpSocket::new_v4().unwrap();
-        socket.bind(addr).unwrap();
-        socket.set_reuseaddr(true).unwrap();
-        let tcp = socket.listen(1024).unwrap();
-        tcp.local_addr().unwrap()
+        let socket =
+            Socket::new(Domain::for_address(addr), Type::STREAM, Some(Protocol::TCP)).unwrap();
+        socket.set_reuse_address(true).unwrap();
+        socket.set_nonblocking(true).unwrap();
+        socket.bind(&addr.into()).unwrap();
+        socket.listen(1024).unwrap();
+        net::TcpListener::from(socket).local_addr().unwrap()
     }
 }
 
@@ -127,7 +135,8 @@ impl TestServerRuntime {
 
     /// Stop server.
     fn stop(&mut self) {
-        self.system.stop();
+        let _ = self.server_handle.stop(false);
+        self.thread_handle.take().unwrap().join().unwrap().unwrap();
     }
 
     /// Connect to server, returning a Tokio `TcpStream`.
@@ -141,3 +150,16 @@ impl Drop for TestServerRuntime {
         self.stop()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use actix_service::fn_service;
+
+    use super::*;
+
+    #[tokio::test]
+    async fn plain_tokio_runtime() {
+        let srv = TestServer::with(|| fn_service(|_sock| async move { Ok::<_, ()>(()) }));
+        assert!(srv.connect().is_ok());
+    }
+}

actix-server/src/waker_queue.rs

@@ -78,12 +78,7 @@ pub(crate) enum WakerInterest {
     Pause,
     Resume,
     Stop,
-    /// `Timer` is an interest sent as a delayed future. When an error happens on accepting
-    /// connection `Accept` would deregister socket listener temporary and wake up the poll and
-    /// register them again after the delayed future resolve.
-    Timer,
-    /// `Worker` is an interest happen after a worker runs into faulted state(This is determined
-    /// by if work can be sent to it successfully).`Accept` would be waked up and add the new
-    /// `WorkerHandleAccept`.
+    /// `Worker` is an interest that is triggered after a worker faults. This is determined by
+    /// trying to send work to it. `Accept` would be waked up and add the new `WorkerHandleAccept`.
     Worker(WorkerHandleAccept),
 }

actix-server/src/worker.rs

@@ -1,6 +1,6 @@
 use std::{
     future::Future,
-    mem,
+    io, mem,
     pin::Pin,
     rc::Rc,
     sync::{
@@ -14,7 +14,7 @@ use std::{
 use actix_rt::{
     spawn,
     time::{sleep, Instant, Sleep},
-    Arbiter,
+    Arbiter, ArbiterHandle, System,
 };
 use futures_core::{future::LocalBoxFuture, ready};
 use log::{error, info, trace};
@@ -23,12 +23,13 @@ use tokio::sync::{
     oneshot,
 };
 
-use crate::join_all;
-use crate::service::{BoxedServerService, InternalServiceFactory};
-use crate::socket::MioStream;
-use crate::waker_queue::{WakerInterest, WakerQueue};
+use crate::{
+    service::{BoxedServerService, InternalServiceFactory},
+    socket::MioStream,
+    waker_queue::{WakerInterest, WakerQueue},
+};
 
-/// Stop worker message. Returns `true` on successful graceful shutdown.
+/// Stop worker message. Returns `true` on successful graceful shutdown
 /// and `false` if some connections still alive when shutdown execute.
 pub(crate) struct Stop {
     graceful: bool,
@@ -41,19 +42,20 @@ pub(crate) struct Conn {
     pub token: usize,
 }
 
+/// Create accept and server worker handles.
 fn handle_pair(
     idx: usize,
-    tx1: UnboundedSender<Conn>,
-    tx2: UnboundedSender<Stop>,
+    conn_tx: UnboundedSender<Conn>,
+    stop_tx: UnboundedSender<Stop>,
     counter: Counter,
 ) -> (WorkerHandleAccept, WorkerHandleServer) {
     let accept = WorkerHandleAccept {
         idx,
-        tx: tx1,
+        conn_tx,
         counter,
     };
 
-    let server = WorkerHandleServer { idx, tx: tx2 };
+    let server = WorkerHandleServer { idx, stop_tx };
 
     (accept, server)
 }
@@ -149,13 +151,13 @@ impl Drop for WorkerCounterGuard {
     }
 }
 
-/// Handle to worker that can send connection message to worker and share the
-/// availability of worker to other thread.
+/// Handle to worker that can send connection message to worker and share the availability of worker
+/// to other threads.
 ///
 /// Held by [Accept](crate::accept::Accept).
 pub(crate) struct WorkerHandleAccept {
     idx: usize,
-    tx: UnboundedSender<Conn>,
+    conn_tx: UnboundedSender<Conn>,
     counter: Counter,
 }
 
@@ -166,8 +168,8 @@ impl WorkerHandleAccept {
     }
 
     #[inline(always)]
-    pub(crate) fn send(&self, msg: Conn) -> Result<(), Conn> {
-        self.tx.send(msg).map_err(|msg| msg.0)
+    pub(crate) fn send(&self, conn: Conn) -> Result<(), Conn> {
+        self.conn_tx.send(conn).map_err(|msg| msg.0)
     }
 
     #[inline(always)]
@@ -181,15 +183,14 @@ impl WorkerHandleAccept {
 /// Held by [ServerBuilder](crate::builder::ServerBuilder).
 #[derive(Debug)]
 pub(crate) struct WorkerHandleServer {
-    #[allow(dead_code)]
-    idx: usize,
-    tx: UnboundedSender<Stop>,
+    pub(crate) idx: usize,
+    stop_tx: UnboundedSender<Stop>,
 }
 
 impl WorkerHandleServer {
     pub(crate) fn stop(&self, graceful: bool) -> oneshot::Receiver<bool> {
         let (tx, rx) = oneshot::channel();
-        let _ = self.tx.send(Stop { graceful, tx });
+        let _ = self.stop_tx.send(Stop { graceful, tx });
         rx
     }
 }
@@ -200,8 +201,8 @@ impl WorkerHandleServer {
 pub(crate) struct ServerWorker {
     // UnboundedReceiver<Conn> should always be the first field.
     // It must be dropped as soon as ServerWorker dropping.
-    rx: UnboundedReceiver<Conn>,
-    rx2: UnboundedReceiver<Stop>,
+    conn_rx: UnboundedReceiver<Conn>,
+    stop_rx: UnboundedReceiver<Stop>,
     counter: WorkerCounter,
     services: Box<[WorkerService]>,
     factories: Box<[Box<dyn InternalServiceFactory>]>,
@@ -210,7 +211,7 @@ pub(crate) struct ServerWorker {
 }
 
 struct WorkerService {
-    factory: usize,
+    factory_idx: usize,
     status: WorkerServiceStatus,
     service: BoxedServerService,
 }
@@ -222,7 +223,7 @@ impl WorkerService {
     }
 }
 
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 enum WorkerServiceStatus {
     Available,
     Unavailable,
@@ -232,8 +233,14 @@ enum WorkerServiceStatus {
     Stopped,
 }
 
+impl Default for WorkerServiceStatus {
+    fn default() -> Self {
+        Self::Unavailable
+    }
+}
+
 /// Config for worker behavior passed down from server builder.
-#[derive(Copy, Clone)]
+#[derive(Debug, Clone, Copy)]
 pub(crate) struct ServerWorkerConfig {
     shutdown_timeout: Duration,
     max_blocking_threads: usize,
@@ -272,15 +279,134 @@ impl ServerWorker {
         factories: Vec<Box<dyn InternalServiceFactory>>,
         waker_queue: WakerQueue,
         config: ServerWorkerConfig,
-    ) -> (WorkerHandleAccept, WorkerHandleServer) {
-        let (tx1, rx) = unbounded_channel();
-        let (tx2, rx2) = unbounded_channel();
+    ) -> io::Result<(WorkerHandleAccept, WorkerHandleServer)> {
+        trace!("starting server worker {}", idx);
+
+        let (tx1, conn_rx) = unbounded_channel();
+        let (tx2, stop_rx) = unbounded_channel();
 
         let counter = Counter::new(config.max_concurrent_connections);
+        let pair = handle_pair(idx, tx1, tx2, counter.clone());
 
-        let counter_clone = counter.clone();
-        // every worker runs in it's own arbiter.
+        // get actix system context if it is set
+        let actix_system = System::try_current();
+
+        // get tokio runtime handle if it is set
+        let tokio_handle = tokio::runtime::Handle::try_current().ok();
+
+        // service factories initialization channel
+        let (factory_tx, factory_rx) = std::sync::mpsc::sync_channel::<io::Result<()>>(1);
+
+        // outline of following code:
+        //
+        // if system exists
+        //   if uring enabled
+        //     start arbiter using uring method
+        //   else
+        //     start arbiter with regular tokio
+        // else
+        //   if uring enabled
+        //     start uring in spawned thread
+        //   else
+        //     start regular tokio in spawned thread
+
+        // every worker runs in it's own thread and tokio runtime.
         // use a custom tokio runtime builder to change the settings of runtime.
+
+        match (actix_system, tokio_handle) {
+            (None, None) => {
+                panic!("No runtime detected. Start a Tokio (or Actix) runtime.");
+            }
+
+            // no actix system
+            (None, Some(rt_handle)) => {
+                std::thread::Builder::new()
+                    .name(format!("actix-server worker {}", idx))
+                    .spawn(move || {
+                        let (worker_stopped_tx, worker_stopped_rx) = oneshot::channel();
+
+                        // local set for running service init futures and worker services
+                        let ls = tokio::task::LocalSet::new();
+
+                        // init services using existing Tokio runtime (so probably on main thread)
+                        let services = rt_handle.block_on(ls.run_until(async {
+                            let mut services = Vec::new();
+
+                            for (idx, factory) in factories.iter().enumerate() {
+                                match factory.create().await {
+                                    Ok((token, svc)) => services.push((idx, token, svc)),
+
+                                    Err(err) => {
+                                        error!("Can not start worker: {:?}", err);
+                                        return Err(io::Error::new(
+                                            io::ErrorKind::Other,
+                                            format!("can not start server service {}", idx),
+                                        ));
+                                    }
+                                }
+                            }
+
+                            Ok(services)
+                        }));
+
+                        let services = match services {
+                            Ok(services) => {
+                                factory_tx.send(Ok(())).unwrap();
+                                services
+                            }
+                            Err(err) => {
+                                factory_tx.send(Err(err)).unwrap();
+                                return;
+                            }
+                        };
+
+                        let worker_services = wrap_worker_services(services);
+
+                        let worker_fut = async move {
+                            // spawn to make sure ServerWorker runs as non boxed future.
+                            spawn(async move {
+                                ServerWorker {
+                                    conn_rx,
+                                    stop_rx,
+                                    services: worker_services.into_boxed_slice(),
+                                    counter: WorkerCounter::new(idx, waker_queue, counter),
+                                    factories: factories.into_boxed_slice(),
+                                    state: WorkerState::default(),
+                                    shutdown_timeout: config.shutdown_timeout,
+                                }
+                                .await;
+
+                                // wake up outermost task waiting for shutdown
+                                worker_stopped_tx.send(()).unwrap();
+                            });
+
+                            worker_stopped_rx.await.unwrap();
+                        };
+
+                        #[cfg(all(target_os = "linux", feature = "io-uring"))]
+                        {
+                            // TODO: pass max blocking thread config when tokio-uring enable configuration
+                            // on building runtime.
+                            let _ = config.max_blocking_threads;
+                            tokio_uring::start(worker_fut);
+                        }
+
+                        #[cfg(not(all(target_os = "linux", feature = "io-uring")))]
+                        {
+                            let rt = tokio::runtime::Builder::new_current_thread()
+                                .enable_all()
+                                .max_blocking_threads(config.max_blocking_threads)
+                                .build()
+                                .unwrap();
+
+                            rt.block_on(ls.run_until(worker_fut));
+                        }
+                    })
+                    .expect("cannot spawn server worker thread");
+            }
+
+            // with actix system
+            (Some(_sys), _) => {
                 #[cfg(all(target_os = "linux", feature = "io-uring"))]
                 let arbiter = {
                     // TODO: pass max blocking thread config when tokio-uring enable configuration
@@ -290,64 +416,62 @@ impl ServerWorker {
                 };
 
                 #[cfg(not(all(target_os = "linux", feature = "io-uring")))]
-        let arbiter = Arbiter::with_tokio_rt(move || {
+                let arbiter = {
+                    Arbiter::with_tokio_rt(move || {
                         tokio::runtime::Builder::new_current_thread()
                             .enable_all()
                             .max_blocking_threads(config.max_blocking_threads)
                             .build()
                             .unwrap()
-        });
-
-        arbiter.spawn(async move {
-            let fut = factories
-                .iter()
-                .enumerate()
-                .map(|(idx, factory)| {
-                    let fut = factory.create();
-                    async move { fut.await.map(|(t, s)| (idx, t, s)) }
                     })
-                .collect::<Vec<_>>();
-
-            // a second spawn to run !Send future tasks.
-            spawn(async move {
-                let res = join_all(fut)
-                    .await
-                    .into_iter()
-                    .collect::<Result<Vec<_>, _>>();
-                let services = match res {
-                    Ok(res) => res
-                        .into_iter()
-                        .fold(Vec::new(), |mut services, (factory, token, service)| {
-                            assert_eq!(token, services.len());
-                            services.push(WorkerService {
-                                factory,
-                                service,
-                                status: WorkerServiceStatus::Unavailable,
-                            });
-                            services
-                        })
-                        .into_boxed_slice(),
-                    Err(e) => {
-                        error!("Can not start worker: {:?}", e);
-                        Arbiter::current().stop();
-                        return;
-                    }
                 };
 
-                // a third spawn to make sure ServerWorker runs as non boxed future.
+                arbiter.spawn(async move {
+                    // spawn_local to run !Send future tasks.
+                    spawn(async move {
+                        let mut services = Vec::new();
+
+                        for (idx, factory) in factories.iter().enumerate() {
+                            match factory.create().await {
+                                Ok((token, svc)) => services.push((idx, token, svc)),
+
+                                Err(err) => {
+                                    error!("Can not start worker: {:?}", err);
+                                    Arbiter::current().stop();
+                                    factory_tx
+                                        .send(Err(io::Error::new(
+                                            io::ErrorKind::Other,
+                                            format!("can not start server service {}", idx),
+                                        )))
+                                        .unwrap();
+                                    return;
+                                }
+                            }
+                        }
+
+                        factory_tx.send(Ok(())).unwrap();
+
+                        let worker_services = wrap_worker_services(services);
+
+                        // spawn to make sure ServerWorker runs as non boxed future.
                         spawn(ServerWorker {
-                    rx,
-                    rx2,
-                    services,
-                    counter: WorkerCounter::new(idx, waker_queue, counter_clone),
+                            conn_rx,
+                            stop_rx,
+                            services: worker_services.into_boxed_slice(),
+                            counter: WorkerCounter::new(idx, waker_queue, counter),
                             factories: factories.into_boxed_slice(),
                             state: Default::default(),
                             shutdown_timeout: config.shutdown_timeout,
                         });
                     });
                 });
+            }
+        };
 
-        handle_pair(idx, tx1, tx2, counter)
+        // wait for service factories initialization
+        factory_rx.recv().unwrap()?;
+
+        Ok(pair)
     }
 
     fn restart_service(&mut self, idx: usize, factory_id: usize) {
@@ -385,7 +509,7 @@ impl ServerWorker {
                         if srv.status == WorkerServiceStatus::Unavailable {
                             trace!(
                                 "Service {:?} is available",
-                                self.factories[srv.factory].name(idx)
+                                self.factories[srv.factory_idx].name(idx)
                             );
                             srv.status = WorkerServiceStatus::Available;
                         }
@@ -396,7 +520,7 @@ impl ServerWorker {
                         if srv.status == WorkerServiceStatus::Available {
                             trace!(
                                 "Service {:?} is unavailable",
-                                self.factories[srv.factory].name(idx)
+                                self.factories[srv.factory_idx].name(idx)
                             );
                             srv.status = WorkerServiceStatus::Unavailable;
                         }
@@ -404,10 +528,10 @@ impl ServerWorker {
                     Poll::Ready(Err(_)) => {
                         error!(
                             "Service {:?} readiness check returned error, restarting",
-                            self.factories[srv.factory].name(idx)
+                            self.factories[srv.factory_idx].name(idx)
                         );
                         srv.status = WorkerServiceStatus::Failed;
-                        return Err((idx, srv.factory));
+                        return Err((idx, srv.factory_idx));
                     }
                 }
             }
@@ -438,7 +562,7 @@ struct Shutdown {
     /// Start time of shutdown.
     start_from: Instant,
 
-    /// Notify of the shutdown outcome (force/grace) to stop caller.
+    /// Notify caller of the shutdown outcome (graceful/force).
     tx: oneshot::Sender<bool>,
 }
 
@@ -450,8 +574,7 @@ impl Default for WorkerState {
 
 impl Drop for ServerWorker {
     fn drop(&mut self) {
-        // Stop the Arbiter ServerWorker runs on on drop.
-        Arbiter::current().stop();
+        Arbiter::try_current().as_ref().map(ArbiterHandle::stop);
     }
 }
 
@@ -462,15 +585,16 @@ impl Future for ServerWorker {
         let this = self.as_mut().get_mut();
 
         // `StopWorker` message handler
-        if let Poll::Ready(Some(Stop { graceful, tx })) = Pin::new(&mut this.rx2).poll_recv(cx)
+        if let Poll::Ready(Some(Stop { graceful, tx })) =
+            Pin::new(&mut this.stop_rx).poll_recv(cx)
         {
             let num = this.counter.total();
             if num == 0 {
-                info!("Shutting down worker, 0 connections");
+                info!("Shutting down idle worker");
                 let _ = tx.send(true);
                 return Poll::Ready(());
             } else if graceful {
-                info!("Graceful worker shutdown, {} connections", num);
+                info!("Graceful worker shutdown; finishing {} connections", num);
                 this.shutdown(false);
 
                 this.state = WorkerState::Shutdown(Shutdown {
@@ -479,7 +603,7 @@ impl Future for ServerWorker {
                     tx,
                 });
             } else {
-                info!("Force shutdown worker, {} connections", num);
+                info!("Force shutdown worker, closing {} connections", num);
                 this.shutdown(true);
 
                 let _ = tx.send(false);
@@ -524,6 +648,14 @@ impl Future for ServerWorker {
                 self.poll(cx)
             }
             WorkerState::Shutdown(ref mut shutdown) => {
+                // drop all pending connections in rx channel.
+                while let Poll::Ready(Some(conn)) = Pin::new(&mut this.conn_rx).poll_recv(cx) {
+                    // WorkerCounterGuard is needed as Accept thread has incremented counter.
+                    // It's guard's job to decrement the counter together with drop of Conn.
+                    let guard = this.counter.guard();
+                    drop((conn, guard));
+                }
+
                 // wait for 1 second
                 ready!(shutdown.timer.as_mut().poll(cx));
 
@@ -564,7 +696,7 @@ impl Future for ServerWorker {
                 }
 
                 // handle incoming io stream
-                match ready!(Pin::new(&mut this.rx).poll_recv(cx)) {
+                match ready!(Pin::new(&mut this.conn_rx).poll_recv(cx)) {
                     Some(msg) => {
                         let guard = this.counter.guard();
                         let _ = this.services[msg.token].service.call((guard, msg.io));
@@ -575,3 +707,19 @@ impl Future for ServerWorker {
         }
     }
 }
+
+fn wrap_worker_services(
+    services: Vec<(usize, usize, BoxedServerService)>,
+) -> Vec<WorkerService> {
+    services
+        .into_iter()
+        .fold(Vec::new(), |mut services, (idx, token, service)| {
+            assert_eq!(token, services.len());
+            services.push(WorkerService {
+                factory_idx: idx,
+                service,
+                status: WorkerServiceStatus::Unavailable,
+            });
+            services
+        })
+}

actix-server/tests/test_server.rs

@@ -1,20 +1,19 @@
-use std::sync::atomic::{AtomicUsize, Ordering};
-use std::sync::{mpsc, Arc};
-use std::{net, thread, time::Duration};
+use std::{
+    net,
+    sync::{
+        atomic::{AtomicUsize, Ordering},
+        mpsc, Arc,
+    },
+    thread,
+    time::Duration,
+};
 
 use actix_rt::{net::TcpStream, time::sleep};
-use actix_server::Server;
+use actix_server::{Server, TestServer};
 use actix_service::fn_service;
-use actix_utils::future::ok;
-use futures_util::future::lazy;
 
 fn unused_addr() -> net::SocketAddr {
-    let addr: net::SocketAddr = "127.0.0.1:0".parse().unwrap();
-    let socket = mio::net::TcpSocket::new_v4().unwrap();
-    socket.bind(addr).unwrap();
-    socket.set_reuseaddr(true).unwrap();
-    let tcp = socket.listen(32).unwrap();
-    tcp.local_addr().unwrap()
+    TestServer::unused_addr()
 }
 
 #[test]
@@ -23,52 +22,94 @@ fn test_bind() {
     let (tx, rx) = mpsc::channel();
 
     let h = thread::spawn(move || {
-        let sys = actix_rt::System::new();
-        let srv = sys.block_on(lazy(|_| {
-            Server::build()
+        actix_rt::System::new().block_on(async {
+            let srv = Server::build()
                 .workers(1)
                 .disable_signals()
-                .bind("test", addr, move || fn_service(|_| ok::<_, ()>(())))
-                .unwrap()
-                .run()
-        }));
+                .bind("test", addr, move || {
+                    fn_service(|_| async { Ok::<_, ()>(()) })
+                })?
+                .run();
 
-        let _ = tx.send((srv, actix_rt::System::current()));
-        let _ = sys.run();
+            let _ = tx.send(srv.handle());
+
+            srv.await
+        })
     });
-    let (_, sys) = rx.recv().unwrap();
+    let srv = rx.recv().unwrap();
 
     thread::sleep(Duration::from_millis(500));
     assert!(net::TcpStream::connect(addr).is_ok());
-    sys.stop();
-    let _ = h.join();
+
+    let _ = srv.stop(true);
+    h.join().unwrap().unwrap();
+}
+
+#[test]
+fn plain_tokio_runtime() {
+    let addr = unused_addr();
+    let (tx, rx) = mpsc::channel();
+
+    let h = thread::spawn(move || {
+        let rt = tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+            .unwrap();
+
+        rt.block_on(async {
+            let srv = Server::build()
+                .workers(1)
+                .disable_signals()
+                .bind("test", addr, move || {
+                    fn_service(|_| async { Ok::<_, ()>(()) })
+                })?
+                .run();
+
+            tx.send(srv.handle()).unwrap();
+
+            srv.await
+        })
+    });
+
+    let srv = rx.recv().unwrap();
+
+    thread::sleep(Duration::from_millis(500));
+    assert!(net::TcpStream::connect(addr).is_ok());
+
+    let _ = srv.stop(true);
+    h.join().unwrap().unwrap();
 }
 
 #[test]
 fn test_listen() {
     let addr = unused_addr();
+    let lst = net::TcpListener::bind(addr).unwrap();
+
     let (tx, rx) = mpsc::channel();
 
     let h = thread::spawn(move || {
-        let sys = actix_rt::System::new();
-        let lst = net::TcpListener::bind(addr).unwrap();
-        sys.block_on(async {
-            Server::build()
+        actix_rt::System::new().block_on(async {
+            let srv = Server::build()
                 .disable_signals()
                 .workers(1)
-                .listen("test", lst, move || fn_service(|_| ok::<_, ()>(())))
-                .unwrap()
+                .listen("test", lst, move || {
+                    fn_service(|_| async { Ok::<_, ()>(()) })
+                })?
                 .run();
-            let _ = tx.send(actix_rt::System::current());
+
+            let _ = tx.send(srv.handle());
+
+            srv.await
+        })
     });
-        let _ = sys.run();
-    });
-    let sys = rx.recv().unwrap();
+
+    let srv = rx.recv().unwrap();
 
     thread::sleep(Duration::from_millis(500));
     assert!(net::TcpStream::connect(addr).is_ok());
-    sys.stop();
-    let _ = h.join();
+
+    let _ = srv.stop(true);
+    h.join().unwrap().unwrap();
 }
 
 #[test]
@@ -84,9 +125,8 @@ fn test_start() {
     let (tx, rx) = mpsc::channel();
 
     let h = thread::spawn(move || {
-        let sys = actix_rt::System::new();
-        let srv = sys.block_on(lazy(|_| {
-            Server::build()
+        actix_rt::System::new().block_on(async {
+            let srv = Server::build()
                 .backlog(100)
                 .disable_signals()
                 .bind("test", addr, move || {
@@ -95,13 +135,13 @@ fn test_start() {
                         f.send(Bytes::from_static(b"test")).await.unwrap();
                         Ok::<_, ()>(())
                     })
-                })
-                .unwrap()
-                .run()
-        }));
+                })?
+                .run();
 
-        let _ = tx.send((srv, actix_rt::System::current()));
-        let _ = sys.run();
+            let _ = tx.send((srv.handle(), actix_rt::System::current()));
+
+            srv.await
+        })
     });
 
     let (srv, sys) = rx.recv().unwrap();
@@ -134,12 +174,11 @@ fn test_start() {
 
     // stop
     let _ = srv.stop(false);
-    thread::sleep(Duration::from_millis(100));
-    assert!(net::TcpStream::connect(addr).is_err());
-
-    thread::sleep(Duration::from_millis(100));
     sys.stop();
-    let _ = h.join();
+    h.join().unwrap().unwrap();
+
+    thread::sleep(Duration::from_secs(1));
+    assert!(net::TcpStream::connect(addr).is_err());
 }
 
 #[actix_rt::test]
@@ -162,11 +201,11 @@ async fn test_max_concurrent_connections() {
 
     let h = thread::spawn(move || {
         actix_rt::System::new().block_on(async {
-            let server = Server::build()
+            let srv = Server::build()
                 // Set a relative higher backlog.
                 .backlog(12)
                 // max connection for a worker is 3.
-                .maxconn(max_conn)
+                .max_concurrent_connections(max_conn)
                 .workers(1)
                 .disable_signals()
                 .bind("test", addr, move || {
@@ -183,9 +222,9 @@ async fn test_max_concurrent_connections() {
                 })?
                 .run();
 
-            let _ = tx.send((server.clone(), actix_rt::System::current()));
+            let _ = tx.send((srv.handle(), actix_rt::System::current()));
 
-            server.await
+            srv.await
         })
     });
 
@@ -209,9 +248,8 @@ async fn test_max_concurrent_connections() {
     }
 
     srv.stop(false).await;
-
     sys.stop();
-    let _ = h.join().unwrap();
+    h.join().unwrap().unwrap();
 }
 
 #[actix_rt::test]
@@ -257,7 +295,7 @@ async fn test_service_restart() {
     let h = thread::spawn(move || {
         let num = num.clone();
         actix_rt::System::new().block_on(async {
-            let server = Server::build()
+            let srv = Server::build()
                 .backlog(1)
                 .disable_signals()
                 .bind("addr1", addr1, move || {
@@ -266,25 +304,23 @@ async fn test_service_restart() {
                         let num = num.clone();
                         async move { Ok::<_, ()>(TestService(num)) }
                     })
-                })
-                .unwrap()
+                })?
                 .bind("addr2", addr2, move || {
                     let num2 = num2.clone();
                     fn_factory(move || {
                         let num2 = num2.clone();
                         async move { Ok::<_, ()>(TestService(num2)) }
                     })
-                })
-                .unwrap()
+                })?
                 .workers(1)
                 .run();
 
-            let _ = tx.send((server.clone(), actix_rt::System::current()));
-            server.await
+            let _ = tx.send(srv.handle());
+            srv.await
         })
     });
 
-    let (server, sys) = rx.recv().unwrap();
+    let srv = rx.recv().unwrap();
 
     for _ in 0..5 {
         TcpStream::connect(addr1)
@@ -306,12 +342,11 @@ async fn test_service_restart() {
     assert!(num_clone.load(Ordering::SeqCst) > 5);
     assert!(num2_clone.load(Ordering::SeqCst) > 5);
 
-    sys.stop();
-    let _ = server.stop(false);
-    let _ = h.join().unwrap();
+    let _ = srv.stop(false);
+    h.join().unwrap().unwrap();
 }
 
-#[ignore]
+#[ignore] // non-deterministic on CI
 #[actix_rt::test]
 async fn worker_restart() {
     use actix_service::{Service, ServiceFactory};
@@ -378,19 +413,19 @@ async fn worker_restart() {
     let h = thread::spawn(move || {
         let counter = counter.clone();
         actix_rt::System::new().block_on(async {
-            let server = Server::build()
+            let srv = Server::build()
                 .disable_signals()
-                .bind("addr", addr, move || TestServiceFactory(counter.clone()))
-                .unwrap()
+                .bind("addr", addr, move || TestServiceFactory(counter.clone()))?
                 .workers(2)
                 .run();
 
-            let _ = tx.send((server.clone(), actix_rt::System::current()));
-            server.await
+            let _ = tx.send(srv.handle());
+
+            srv.await
         })
     });
 
-    let (server, sys) = rx.recv().unwrap();
+    let srv = rx.recv().unwrap();
 
     sleep(Duration::from_secs(3)).await;
 
@@ -447,7 +482,32 @@ async fn worker_restart() {
     assert_eq!("3", id);
     stream.shutdown().await.unwrap();
 
-    sys.stop();
-    let _ = server.stop(false);
-    let _ = h.join().unwrap();
+    let _ = srv.stop(false);
+    h.join().unwrap().unwrap();
+}
+
+#[test]
+#[should_panic]
+fn no_runtime() {
+    // test set up in a way that would prevent time out if support for runtime-less init was added
+
+    let addr = unused_addr();
+
+    let srv = Server::build()
+        .workers(1)
+        .disable_signals()
+        .bind("test", addr, move || {
+            fn_service(|_| async { Ok::<_, ()>(()) })
+        })
+        .unwrap()
+        .run();
+
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .enable_all()
+        .build()
+        .unwrap();
+
+    let _ = srv.handle().stop(true);
+
+    rt.block_on(async { srv.await }).unwrap();
 }

actix-service/CHANGES.md

@@ -59,221 +59,124 @@
 
 
 ## 1.0.6 - 2020-08-09
-
-### Fixed
-
 * Removed unsound custom Cell implementation that allowed obtaining several mutable references to
   the same data, which is undefined behavior in Rust and could lead to violations of memory safety. External code could obtain several mutable references to the same data through
   service combinators. Attempts to acquire several mutable references to the same data will instead
   result in a panic.
 
-## [1.0.5] - 2020-01-16
 
-### Fixed
+## 1.0.5 - 2020-01-16
+* Fixed unsoundness in .and_then()/.then() service combinators.
 
-* Fixed unsoundness in .and_then()/.then() service combinators
-
-## [1.0.4] - 2020-01-15
-
-### Fixed
 
+## 1.0.4 - 2020-01-15
 * Revert 1.0.3 change
 
-## [1.0.3] - 2020-01-15
 
-### Fixed
-
-* Fixed unsoundness in `AndThenService` impl
-
-## [1.0.2] - 2020-01-08
-
-### Added
-
-* Add `into_service` helper function
+## 1.0.3 - 2020-01-15
+* Fixed unsoundness in `AndThenService` impl.
 
 
-## [1.0.1] - 2019-12-22
-
-### Changed
-
-* `map_config()` and `unit_config()` accepts `IntoServiceFactory` type
+## 1.0.2 - 2020-01-08
+* Add `into_service` helper function.
 
 
-## [1.0.0] - 2019-12-11
+## 1.0.1 - 2019-12-22
+* `map_config()` and `unit_config()` now accept `IntoServiceFactory` type.
 
-### Added
 
+## 1.0.0 - 2019-12-11
 * Add Clone impl for Apply service
 
 
-## [1.0.0-alpha.4] - 2019-12-08
-
-### Changed
-
+## 1.0.0-alpha.4 - 2019-12-08
 * Renamed `service_fn` to `fn_service`
-
 * Renamed `factory_fn` to `fn_factory`
-
 * Renamed `factory_fn_cfg` to `fn_factory_with_config`
 
 
-## [1.0.0-alpha.3] - 2019-12-06
-
-### Changed
-
+## 1.0.0-alpha.3 - 2019-12-06
 * Add missing Clone impls
-
 * Restore `Transform::map_init_err()` combinator
-
 * Restore `Service/Factory::apply_fn()` in form of `Pipeline/Factory::and_then_apply_fn()`
-
 * Optimize service combinators and futures memory layout
 
 
-## [1.0.0-alpha.2] - 2019-12-02
-
-### Changed
-
+## 1.0.0-alpha.2 - 2019-12-02
 * Use owned config value for service factory
-
 * Renamed BoxedNewService/BoxedService to BoxServiceFactory/BoxService
 
 
-## [1.0.0-alpha.1] - 2019-11-25
-
-### Changed
-
-* Migraded to `std::future`
-
+## 1.0.0-alpha.1 - 2019-11-25
+* Migrated to `std::future`
 * `NewService` renamed to `ServiceFactory`
-
 * Added `pipeline` and `pipeline_factory` function
 
 
-## [0.4.2] - 2019-08-27
-
-### Fixed
-
+## 0.4.2 - 2019-08-27
 * Check service readiness for `new_apply_cfg` combinator
 
 
-## [0.4.1] - 2019-06-06
-
-### Added
-
+## 0.4.1 - 2019-06-06
 * Add `new_apply_cfg` function
 
-## [0.4.0] - 2019-05-12
 
-### Changed
-
-* Use associated type for `NewService` config
-
-* Change `apply_cfg` function
-
-* Renamed helper functions
-
-### Added
-
-* Add `NewService::map_config` and `NewService::unit_config` combinators
+## 0.4.0 - 2019-05-12
+* Add `NewService::map_config` and `NewService::unit_config` combinators.
+* Use associated type for `NewService` config.
+* Change `apply_cfg` function.
+* Renamed helper functions.
 
 
-## [0.3.6] - 2019-04-07
-
-### Changed
-
+## 0.3.6 - 2019-04-07
 * Poll boxed service call result immediately
 
 
-## [0.3.5] - 2019-03-29
-
-### Added
-
-* Add `impl<S: Service> Service for Rc<RefCell<S>>`
+## 0.3.5 - 2019-03-29
+* Add `impl<S: Service> Service for Rc<RefCell<S>>`.
 
 
-## [0.3.4] - 2019-03-12
-
-### Added
-
+## 0.3.4 - 2019-03-12
 * Add `Transform::from_err()` combinator
-
 * Add `apply_fn` helper
-
 * Add `apply_fn_factory` helper
-
 * Add `apply_transform` helper
-
 * Add `apply_cfg` helper
 
 
-## [0.3.3] - 2019-03-09
-
-### Added
-
+## 0.3.3 - 2019-03-09
 * Add `ApplyTransform` new service for transform and new service.
-
-* Add `NewService::apply_cfg()` combinator, allows to use
-  nested `NewService` with different config parameter.
-
-### Changed
-
+* Add `NewService::apply_cfg()` combinator, allows to use nested `NewService` with different config parameter.
 * Revert IntoFuture change
 
 
-## [0.3.2] - 2019-03-04
-
-### Changed
-
+## 0.3.2 - 2019-03-04
 * Change `NewService::Future` and `Transform::Future` to the `IntoFuture` trait.
-
 * Export `AndThenTransform` type
 
 
-## [0.3.1] - 2019-03-04
-
-### Changed
-
+## 0.3.1 - 2019-03-04
 * Simplify Transform trait
 
 
-## [0.3.0] - 2019-03-02
-
-## Added
-
+## 0.3.0 - 2019-03-02
 * Added boxed NewService and Service.
-
-## Changed
-
 * Added `Config` parameter to `NewService` trait.
-
 * Added `Config` parameter to `NewTransform` trait.
 
 
-## [0.2.2] - 2019-02-19
-
-### Added
-
+## 0.2.2 - 2019-02-19
 * Added `NewService` impl for `Rc<S> where S: NewService`
-
 * Added `NewService` impl for `Arc<S> where S: NewService`
 
 
-## [0.2.1] - 2019-02-03
-
-### Changed
-
+## 0.2.1 - 2019-02-03
 * Generalize `.apply` combinator with Transform trait
 
 
-## [0.2.0] - 2019-02-01
-
-### Changed
-
+## 0.2.0 - 2019-02-01
 * Use associated type instead of generic for Service definition.
-
   * Before:
-
     ```rust
     impl Service<Request> for Client {
         type Response = Response;
@@ -281,7 +184,6 @@
     }
     ```
   * After:
-
     ```rust
     impl Service for Client {
         type Request = Request;
@@ -291,50 +193,30 @@
     ```
 
 
-## [0.1.6] - 2019-01-24
-
-### Changed
-
+## 0.1.6 - 2019-01-24
 * Use `FnMut` instead of `Fn` for .apply() and .map() combinators and `FnService` type
-
 * Change `.apply()` error semantic, new service's error is `From<Self::Error>`
 
 
-## [0.1.5] - 2019-01-13
-
-### Changed
-
-* Make `Out::Error` convertable from `T::Error` for apply combinator
+## 0.1.5 - 2019-01-13
+* Make `Out::Error` convertible from `T::Error` for apply combinator
 
 
-## [0.1.4] - 2019-01-11
-
-### Changed
-
+## 0.1.4 - 2019-01-11
 * Use `FnMut` instead of `Fn` for `FnService`
 
 
-## [0.1.3] - 2018-12-12
-
-### Changed
-
+## 0.1.3 - 2018-12-12
 * Split service combinators to separate trait
 
 
-## [0.1.2] - 2018-12-12
-
-### Fixed
-
+## 0.1.2 - 2018-12-12
 * Release future early for `.and_then()` and `.then()` combinators
 
 
-## [0.1.1] - 2018-12-09
-
-### Added
-
-* Added Service impl for Box<S: Service>
+## 0.1.1 - 2018-12-09
+* Added Service impl for `Box<S: Service>`
 
 
-## [0.1.0] - 2018-12-09
-
+## 0.1.0 - 2018-12-09
 * Initial import

actix-service/src/macros.rs

@@ -1,7 +1,7 @@
 /// An implementation of [`poll_ready`]() that always signals readiness.
 ///
 /// This should only be used for basic leaf services that have no concept of un-readiness.
-/// For wrapper or other serivice types, use [`forward_ready!`] for simple cases or write a bespoke
+/// For wrapper or other service types, use [`forward_ready!`] for simple cases or write a bespoke
 /// `poll_ready` implementation.
 ///
 /// [`poll_ready`]: crate::Service::poll_ready

actix-service/src/map_err.rs

@@ -9,26 +9,25 @@ use pin_project_lite::pin_project;
 
 use super::{Service, ServiceFactory};
 
-/// Service for the `map_err` combinator, changing the type of a service's
-/// error.
+/// Service for the `map_err` combinator, changing the type of a service's error.
 ///
 /// This is created by the `ServiceExt::map_err` method.
 pub struct MapErr<S, Req, F, E> {
     service: S,
-    f: F,
+    mapper: F,
     _t: PhantomData<fn(Req) -> E>,
 }
 
 impl<S, Req, F, E> MapErr<S, Req, F, E> {
     /// Create new `MapErr` combinator
-    pub(crate) fn new(service: S, f: F) -> Self
+    pub(crate) fn new(service: S, mapper: F) -> Self
     where
         S: Service<Req>,
         F: Fn(S::Error) -> E,
     {
         Self {
             service,
-            f,
+            mapper,
             _t: PhantomData,
         }
     }
@@ -42,7 +41,7 @@ where
     fn clone(&self) -> Self {
         MapErr {
             service: self.service.clone(),
-            f: self.f.clone(),
+            mapper: self.mapper.clone(),
             _t: PhantomData,
         }
     }
@@ -58,11 +57,11 @@ where
     type Future = MapErrFuture<A, Req, F, E>;
 
     fn poll_ready(&self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.service.poll_ready(ctx).map_err(&self.f)
+        self.service.poll_ready(ctx).map_err(&self.mapper)
     }
 
     fn call(&self, req: Req) -> Self::Future {
-        MapErrFuture::new(self.service.call(req), self.f.clone())
+        MapErrFuture::new(self.service.call(req), self.mapper.clone())
     }
 }
 
@@ -105,23 +104,23 @@ where
 /// service's error.
 ///
 /// This is created by the `NewServiceExt::map_err` method.
-pub struct MapErrServiceFactory<A, Req, F, E>
+pub struct MapErrServiceFactory<SF, Req, F, E>
 where
-    A: ServiceFactory<Req>,
-    F: Fn(A::Error) -> E + Clone,
+    SF: ServiceFactory<Req>,
+    F: Fn(SF::Error) -> E + Clone,
 {
-    a: A,
+    a: SF,
     f: F,
     e: PhantomData<fn(Req) -> E>,
 }
 
-impl<A, Req, F, E> MapErrServiceFactory<A, Req, F, E>
+impl<SF, Req, F, E> MapErrServiceFactory<SF, Req, F, E>
 where
-    A: ServiceFactory<Req>,
-    F: Fn(A::Error) -> E + Clone,
+    SF: ServiceFactory<Req>,
+    F: Fn(SF::Error) -> E + Clone,
 {
     /// Create new `MapErr` new service instance
-    pub(crate) fn new(a: A, f: F) -> Self {
+    pub(crate) fn new(a: SF, f: F) -> Self {
         Self {
             a,
             f,
@@ -130,10 +129,10 @@ where
     }
 }
 
-impl<A, Req, F, E> Clone for MapErrServiceFactory<A, Req, F, E>
+impl<SF, Req, F, E> Clone for MapErrServiceFactory<SF, Req, F, E>
 where
-    A: ServiceFactory<Req> + Clone,
-    F: Fn(A::Error) -> E + Clone,
+    SF: ServiceFactory<Req> + Clone,
+    F: Fn(SF::Error) -> E + Clone,
 {
     fn clone(&self) -> Self {
         Self {
@@ -144,57 +143,57 @@ where
     }
 }
 
-impl<A, Req, F, E> ServiceFactory<Req> for MapErrServiceFactory<A, Req, F, E>
+impl<SF, Req, F, E> ServiceFactory<Req> for MapErrServiceFactory<SF, Req, F, E>
 where
-    A: ServiceFactory<Req>,
-    F: Fn(A::Error) -> E + Clone,
+    SF: ServiceFactory<Req>,
+    F: Fn(SF::Error) -> E + Clone,
 {
-    type Response = A::Response;
+    type Response = SF::Response;
     type Error = E;
 
-    type Config = A::Config;
-    type Service = MapErr<A::Service, Req, F, E>;
-    type InitError = A::InitError;
-    type Future = MapErrServiceFuture<A, Req, F, E>;
+    type Config = SF::Config;
+    type Service = MapErr<SF::Service, Req, F, E>;
+    type InitError = SF::InitError;
+    type Future = MapErrServiceFuture<SF, Req, F, E>;
 
-    fn new_service(&self, cfg: A::Config) -> Self::Future {
+    fn new_service(&self, cfg: SF::Config) -> Self::Future {
         MapErrServiceFuture::new(self.a.new_service(cfg), self.f.clone())
     }
 }
 
 pin_project! {
-    pub struct MapErrServiceFuture<A, Req, F, E>
+    pub struct MapErrServiceFuture<SF, Req, F, E>
     where
-        A: ServiceFactory<Req>,
-        F: Fn(A::Error) -> E,
+        SF: ServiceFactory<Req>,
+        F: Fn(SF::Error) -> E,
     {
         #[pin]
-        fut: A::Future,
-        f: F,
+        fut: SF::Future,
+        mapper: F,
     }
 }
 
-impl<A, Req, F, E> MapErrServiceFuture<A, Req, F, E>
+impl<SF, Req, F, E> MapErrServiceFuture<SF, Req, F, E>
 where
-    A: ServiceFactory<Req>,
-    F: Fn(A::Error) -> E,
+    SF: ServiceFactory<Req>,
+    F: Fn(SF::Error) -> E,
 {
-    fn new(fut: A::Future, f: F) -> Self {
-        MapErrServiceFuture { fut, f }
+    fn new(fut: SF::Future, mapper: F) -> Self {
+        MapErrServiceFuture { fut, mapper }
     }
 }
 
-impl<A, Req, F, E> Future for MapErrServiceFuture<A, Req, F, E>
+impl<SF, Req, F, E> Future for MapErrServiceFuture<SF, Req, F, E>
 where
-    A: ServiceFactory<Req>,
-    F: Fn(A::Error) -> E + Clone,
+    SF: ServiceFactory<Req>,
+    F: Fn(SF::Error) -> E + Clone,
 {
-    type Output = Result<MapErr<A::Service, Req, F, E>, A::InitError>;
+    type Output = Result<MapErr<SF::Service, Req, F, E>, SF::InitError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         let this = self.project();
         if let Poll::Ready(svc) = this.fut.poll(cx)? {
-            Poll::Ready(Ok(MapErr::new(svc, this.f.clone())))
+            Poll::Ready(Ok(MapErr::new(svc, this.mapper.clone())))
         } else {
             Poll::Pending
         }

actix-tls/CHANGES.md

@@ -3,6 +3,94 @@
 ## Unreleased - 2021-xx-xx
 
 
+## 3.0.0-rc.1 - 2021-11-29
+### Added
+* Derive `Debug` for `connect::Connection`. [#422]
+* Implement `Display` for `accept::TlsError`. [#422]
+* Implement `Error` for `accept::TlsError` where both types also implement `Error`. [#422]
+* Implement `Default` for `connect::Resolver`. [#422]
+* Implement `Error` for `connect::ConnectError`. [#422]
+* Implement `Default` for `connect::tcp::{TcpConnector, TcpConnectorService}`. [#423]
+* Implement `Default` for `connect::ConnectorService`. [#423]
+
+### Changed
+* The crate's default features flags no longer include `uri`. [#422]
+* Useful re-exports from underlying TLS crates are exposed in a `reexports` modules in all acceptors and connectors.
+* Convert `connect::ResolverService` from enum to struct. [#422]
+* Make `ConnectAddrsIter` private. [#422]
+* Mark `tcp::{TcpConnector, TcpConnectorService}` structs `#[non_exhaustive]`. [#423]
+* Rename `accept::native_tls::{NativeTlsAcceptorService => AcceptorService}`. [#422]
+* Rename `connect::{Address => Host}` trait. [#422]
+* Rename method `connect::Connection::{host => hostname}`. [#422]
+* Rename struct `connect::{Connect => ConnectInfo}`. [#422]
+* Rename struct `connect::{ConnectService => ConnectorService}`. [#422]
+* Rename struct `connect::{ConnectServiceFactory => Connector}`. [#422]
+* Rename TLS acceptor service future types and hide from docs. [#422]
+* Unbox some service futures types. [#422]
+* Inline modules in `connect::tls` to `connect` module. [#422]
+
+### Removed
+* Remove `connect::{new_connector, new_connector_factory, default_connector, default_connector_factory}` methods. [#422]
+* Remove `connect::native_tls::Connector::service` method. [#422]
+* Remove redundant `connect::Connection::from_parts` method. [#422]
+
+[#422]: https://github.com/actix/actix-net/pull/422
+[#423]: https://github.com/actix/actix-net/pull/423
+
+
+### Added
+* Derive `Debug` for `connect::Connection`. [#422]
+* Implement `Display` for `accept::TlsError`. [#422]
+* Implement `Error` for `accept::TlsError` where both types also implement `Error`. [#422]
+* Implement `Default` for `connect::Resolver`. [#422]
+* Implement `Error` for `connect::ConnectError`. [#422]
+
+### Changed
+* The crate's default features flags no longer include `uri`. [#422]
+* Useful re-exports from underlying TLS crates are exposed in a `reexports` modules in all acceptors and connectors.
+* Convert `connect::ResolverService` from enum to struct. [#422]
+* Make `ConnectAddrsIter` private. [#422]
+* Rename `accept::native_tls::{NativeTlsAcceptorService => AcceptorService}`. [#422]
+* Rename `connect::{Address => Host}` trait. [#422]
+* Rename method `connect::Connection::{host => hostname}`. [#422]
+* Rename struct `connect::{Connect => ConnectInfo}`. [#422]
+* Rename struct `connect::{ConnectService => ConnectorService}`. [#422]
+* Rename struct `connect::{ConnectServiceFactory => Connector}`. [#422]
+* Rename TLS acceptor service future types and hide from docs. [#422]
+* Unbox some service futures types. [#422]
+* Inline modules in `connect::tls` to `connect` module. [#422]
+
+### Removed
+* Remove `connect::{new_connector, new_connector_factory, default_connector, default_connector_factory}` methods. [#422]
+* Remove `connect::native_tls::Connector::service` method. [#422]
+* Remove redundant `connect::Connection::from_parts` method. [#422]
+
+[#422]: https://github.com/actix/actix-net/pull/422
+
+
+## 3.0.0-beta.9 - 2021-11-22
+* Add configurable timeout for accepting TLS connection. [#393]
+* Added `TlsError::Timeout` variant. [#393]
+* All TLS acceptor services now use `TlsError` for their error types. [#393]
+* Added `TlsError::into_service_error`. [#420]
+
+[#393]: https://github.com/actix/actix-net/pull/393
+[#420]: https://github.com/actix/actix-net/pull/420
+
+
+## 3.0.0-beta.8 - 2021-11-15
+* Add `Connect::request` for getting a reference to the connection request. [#415]
+
+[#415]: https://github.com/actix/actix-net/pull/415
+
+
+## 3.0.0-beta.7 - 2021-10-20
+* Add `webpki_roots_cert_store()` to get rustls compatible webpki roots cert store. [#401]
+* Alias `connect::ssl` to `connect::tls`. [#401]
+
+[#401]: https://github.com/actix/actix-net/pull/401
+
+
 ## 3.0.0-beta.6 - 2021-10-19
 * Update `tokio-rustls` to `0.23` which uses `rustls` `0.20`. [#396]
 * Removed a re-export of `Session` from `rustls` as it no longer exist. [#396]
@@ -18,8 +106,7 @@
 * Remove `connect::ssl::openssl::OpensslConnectService`. [#297]
 * Add `connect::ssl::native_tls` module for native tls support. [#295]
 * Rename `accept::{nativetls => native_tls}`. [#295]
-* Remove `connect::TcpConnectService` type. service caller expect a `TcpStream` should use
-  `connect::ConnectService` instead and call `Connection<T, TcpStream>::into_parts`. [#299]
+* Remove `connect::TcpConnectService` type. Service caller expecting a `TcpStream` should use `connect::ConnectService` instead and call `Connection<T, TcpStream>::into_parts`. [#299]
 
 [#295]: https://github.com/actix/actix-net/pull/295
 [#296]: https://github.com/actix/actix-net/pull/296

actix-tls/Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "actix-tls"
-version = "3.0.0-beta.6"
-authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+version = "3.0.0-rc.1"
+authors = [
+    "Nikolay Kim <fafhrd91@gmail.com>",
+    "Rob Ede <robjtede@icloud.com>",
+]
 description = "TLS acceptor and connector services for Actix ecosystem"
 keywords = ["network", "tls", "ssl", "async", "transport"]
 repository = "https://github.com/actix/actix-net.git"
@@ -10,14 +13,15 @@ license = "MIT OR Apache-2.0"
 edition = "2018"
 
 [package.metadata.docs.rs]
-features = ["openssl", "rustls", "native-tls", "accept", "connect", "uri"]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
 
 [lib]
 name = "actix_tls"
 path = "src/lib.rs"
 
 [features]
-default = ["accept", "connect", "uri"]
+default = ["accept", "connect"]
 
 # enable acceptor services
 accept = []
@@ -45,31 +49,36 @@ actix-utils = "3.0.0"
 
 derive_more = "0.99.5"
 futures-core = { version = "0.3.7", default-features = false, features = ["alloc"] }
-http = { version = "0.2.3", optional = true }
 log = "0.4"
+pin-project-lite = "0.2.7"
 tokio-util = { version = "0.6.3", default-features = false }
 
+# uri
+http = { version = "0.2.3", optional = true }
+
 # openssl
 tls-openssl = { package = "openssl", version = "0.10.9", optional = true }
 tokio-openssl = { version = "0.6", optional = true }
 
 # rustls
 tokio-rustls = { version = "0.23", optional = true }
-webpki-roots = { version = "0.21", optional = true }
+webpki-roots = { version = "0.22", optional = true }
 
 # native-tls
 tokio-native-tls = { version = "0.3", optional = true }
 
 [dev-dependencies]
 actix-rt = "2.2.0"
-actix-server = "2.0.0-beta.6"
+actix-server = "2.0.0-beta.9"
 bytes = "1"
-env_logger = "0.8"
+env_logger = "0.9"
 futures-util = { version = "0.3.7", default-features = false, features = ["sink"] }
 log = "0.4"
+rcgen = "0.8"
 rustls-pemfile = "0.2.1"
+tokio-rustls = { version = "0.23", features = ["dangerous_configuration"] }
 trust-dns-resolver = "0.20.0"
 
 [[example]]
-name = "tcp-rustls"
+name = "accept-rustls"
 required-features = ["accept", "rustls"]

actix-tls/examples/accept-rustls.rs

@@ -1,4 +1,4 @@
-//! TLS Acceptor Server
+//! No-Op TLS Acceptor Server
 //!
 //! Using either HTTPie (`http`) or cURL:
 //!

actix-tls/src/accept/mod.rs

@@ -1,25 +1,31 @@
-//! TLS acceptor services for Actix ecosystem.
-//!
-//! ## Crate Features
-//! * `openssl` - TLS acceptor using the `openssl` crate.
-//! * `rustls` - TLS acceptor using the `rustls` crate.
-//! * `native-tls` - TLS acceptor using the `native-tls` crate.
+//! TLS connection acceptor services.
 
-use std::sync::atomic::{AtomicUsize, Ordering};
+use std::{
+    convert::Infallible,
+    sync::atomic::{AtomicUsize, Ordering},
+};
 
 use actix_utils::counter::Counter;
+use derive_more::{Display, Error};
 
 #[cfg(feature = "openssl")]
+#[cfg_attr(docsrs, doc(cfg(feature = "openssl")))]
 pub mod openssl;
 
 #[cfg(feature = "rustls")]
+#[cfg_attr(docsrs, doc(cfg(feature = "rustls")))]
 pub mod rustls;
 
 #[cfg(feature = "native-tls")]
+#[cfg_attr(docsrs, doc(cfg(feature = "native-tls")))]
 pub mod native_tls;
 
 pub(crate) static MAX_CONN: AtomicUsize = AtomicUsize::new(256);
 
+#[cfg(any(feature = "openssl", feature = "rustls", feature = "native-tls"))]
+pub(crate) const DEFAULT_TLS_HANDSHAKE_TIMEOUT: std::time::Duration =
+    std::time::Duration::from_secs(3);
+
 thread_local! {
     static MAX_CONN_COUNTER: Counter = Counter::new(MAX_CONN.load(Ordering::Relaxed));
 }
@@ -34,9 +40,52 @@ pub fn max_concurrent_tls_connect(num: usize) {
     MAX_CONN.store(num, Ordering::Relaxed);
 }
 
-/// TLS error combined with service error.
-#[derive(Debug)]
-pub enum TlsError<E1, E2> {
-    Tls(E1),
-    Service(E2),
+/// TLS handshake error, TLS timeout, or inner service error.
+///
+/// All TLS acceptors from this crate will return the `SvcErr` type parameter as [`Infallible`],
+/// which can be cast to your own service type, inferred or otherwise,
+/// using [`into_service_error`](Self::into_service_error).
+#[derive(Debug, Display, Error)]
+pub enum TlsError<TlsErr, SvcErr> {
+    /// TLS handshake has timed-out.
+    #[display(fmt = "TLS handshake has timed-out")]
+    Timeout,
+
+    /// Wraps TLS service errors.
+    #[display(fmt = "TLS handshake error")]
+    Tls(TlsErr),
+
+    /// Wraps service errors.
+    #[display(fmt = "Service error")]
+    Service(SvcErr),
+}
+
+impl<TlsErr> TlsError<TlsErr, Infallible> {
+    /// Casts the infallible service error type returned from acceptors into caller's type.
+    ///
+    /// # Examples
+    /// ```
+    /// # use std::convert::Infallible;
+    /// # use actix_tls::accept::TlsError;
+    /// let a: TlsError<u32, Infallible> = TlsError::Tls(42);
+    /// let _b: TlsError<u32, u64> = a.into_service_error();
+    /// ```
+    pub fn into_service_error<SvcErr>(self) -> TlsError<TlsErr, SvcErr> {
+        match self {
+            Self::Timeout => TlsError::Timeout,
+            Self::Tls(err) => TlsError::Tls(err),
+            Self::Service(err) => match err {},
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn tls_service_error_inference() {
+        let a: TlsError<u32, Infallible> = TlsError::Tls(42);
+        let _b: TlsError<u32, u64> = a.into_service_error();
+    }
 }

actix-tls/src/accept/native_tls.rs

@@ -1,45 +1,42 @@
+//! `native-tls` based TLS connection acceptor service.
+//!
+//! See [`Acceptor`] for main service factory docs.
+
 use std::{
+    convert::Infallible,
     io::{self, IoSlice},
-    ops::{Deref, DerefMut},
     pin::Pin,
     task::{Context, Poll},
+    time::Duration,
 };
 
 use actix_codec::{AsyncRead, AsyncWrite, ReadBuf};
-use actix_rt::net::{ActixStream, Ready};
+use actix_rt::{
+    net::{ActixStream, Ready},
+    time::timeout,
+};
 use actix_service::{Service, ServiceFactory};
-use actix_utils::counter::Counter;
+use actix_utils::{
+    counter::Counter,
+    future::{ready, Ready as FutReady},
+};
+use derive_more::{Deref, DerefMut, From};
 use futures_core::future::LocalBoxFuture;
+use tokio_native_tls::{native_tls::Error, TlsAcceptor};
 
-pub use tokio_native_tls::native_tls::Error;
-pub use tokio_native_tls::TlsAcceptor;
+use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
 
-use super::MAX_CONN_COUNTER;
+pub mod reexports {
+    //! Re-exports from `native-tls` that are useful for acceptors.
 
-/// Wrapper type for `tokio_native_tls::TlsStream` in order to impl `ActixStream` trait.
-pub struct TlsStream<T>(tokio_native_tls::TlsStream<T>);
-
-impl<T> From<tokio_native_tls::TlsStream<T>> for TlsStream<T> {
-    fn from(stream: tokio_native_tls::TlsStream<T>) -> Self {
-        Self(stream)
-    }
+    pub use tokio_native_tls::{native_tls::Error, TlsAcceptor};
 }
 
-impl<T: ActixStream> Deref for TlsStream<T> {
-    type Target = tokio_native_tls::TlsStream<T>;
+/// Wraps a `native-tls` based async TLS stream in order to implement [`ActixStream`].
+#[derive(Deref, DerefMut, From)]
+pub struct TlsStream<IO>(tokio_native_tls::TlsStream<IO>);
 
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl<T: ActixStream> DerefMut for TlsStream<T> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
-
-impl<T: ActixStream> AsyncRead for TlsStream<T> {
+impl<IO: ActixStream> AsyncRead for TlsStream<IO> {
     fn poll_read(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
@@ -49,7 +46,7 @@ impl<T: ActixStream> AsyncRead for TlsStream<T> {
     }
 }
 
-impl<T: ActixStream> AsyncWrite for TlsStream<T> {
+impl<IO: ActixStream> AsyncWrite for TlsStream<IO> {
     fn poll_write(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
@@ -79,28 +76,37 @@ impl<T: ActixStream> AsyncWrite for TlsStream<T> {
     }
 }
 
-impl<T: ActixStream> ActixStream for TlsStream<T> {
+impl<IO: ActixStream> ActixStream for TlsStream<IO> {
     fn poll_read_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
-        T::poll_read_ready((&**self).get_ref().get_ref().get_ref(), cx)
+        IO::poll_read_ready((&**self).get_ref().get_ref().get_ref(), cx)
     }
 
     fn poll_write_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
-        T::poll_write_ready((&**self).get_ref().get_ref().get_ref(), cx)
+        IO::poll_write_ready((&**self).get_ref().get_ref().get_ref(), cx)
     }
 }
 
-/// Accept TLS connections via `native-tls` package.
-///
-/// `native-tls` feature enables this `Acceptor` type.
+/// Accept TLS connections via the `native-tls` crate.
 pub struct Acceptor {
     acceptor: TlsAcceptor,
+    handshake_timeout: Duration,
 }
 
 impl Acceptor {
-    /// Create `native-tls` based `Acceptor` service factory.
-    #[inline]
+    /// Constructs `native-tls` based acceptor service factory.
     pub fn new(acceptor: TlsAcceptor) -> Self {
-        Acceptor { acceptor }
+        Acceptor {
+            acceptor,
+            handshake_timeout: DEFAULT_TLS_HANDSHAKE_TIMEOUT,
+        }
+    }
+
+    /// Limit the amount of time that the acceptor will wait for a TLS handshake to complete.
+    ///
+    /// Default timeout is 3 seconds.
+    pub fn set_handshake_timeout(&mut self, handshake_timeout: Duration) -> &mut Self {
+        self.handshake_timeout = handshake_timeout;
+        self
     }
 }
 
@@ -109,39 +115,43 @@ impl Clone for Acceptor {
     fn clone(&self) -> Self {
         Self {
             acceptor: self.acceptor.clone(),
+            handshake_timeout: self.handshake_timeout,
         }
     }
 }
 
-impl<T: ActixStream + 'static> ServiceFactory<T> for Acceptor {
-    type Response = TlsStream<T>;
-    type Error = Error;
+impl<IO: ActixStream + 'static> ServiceFactory<IO> for Acceptor {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<Error, Infallible>;
     type Config = ();
-
-    type Service = NativeTlsAcceptorService;
+    type Service = AcceptorService;
     type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
+    type Future = FutReady<Result<Self::Service, Self::InitError>>;
 
     fn new_service(&self, _: ()) -> Self::Future {
         let res = MAX_CONN_COUNTER.with(|conns| {
-            Ok(NativeTlsAcceptorService {
+            Ok(AcceptorService {
                 acceptor: self.acceptor.clone(),
                 conns: conns.clone(),
+                handshake_timeout: self.handshake_timeout,
             })
         });
-        Box::pin(async { res })
+
+        ready(res)
     }
 }
 
-pub struct NativeTlsAcceptorService {
+/// Native-TLS based acceptor service.
+pub struct AcceptorService {
     acceptor: TlsAcceptor,
     conns: Counter,
+    handshake_timeout: Duration,
 }
 
-impl<T: ActixStream + 'static> Service<T> for NativeTlsAcceptorService {
-    type Response = TlsStream<T>;
-    type Error = Error;
-    type Future = LocalBoxFuture<'static, Result<TlsStream<T>, Error>>;
+impl<IO: ActixStream + 'static> Service<IO> for AcceptorService {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<Error, Infallible>;
+    type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
 
     fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         if self.conns.available(cx) {
@@ -151,13 +161,21 @@ impl<T: ActixStream + 'static> Service<T> for NativeTlsAcceptorService {
         }
     }
 
-    fn call(&self, io: T) -> Self::Future {
+    fn call(&self, io: IO) -> Self::Future {
         let guard = self.conns.get();
         let acceptor = self.acceptor.clone();
+
+        let dur = self.handshake_timeout;
+
         Box::pin(async move {
-            let io = acceptor.accept(io).await;
+            match timeout(dur, acceptor.accept(io)).await {
+                Ok(Ok(io)) => {
                     drop(guard);
-            io.map(Into::into)
+                    Ok(TlsStream(io))
+                }
+                Ok(Err(err)) => Err(TlsError::Tls(err)),
+                Err(_timeout) => Err(TlsError::Timeout),
+            }
         })
     }
 }

actix-tls/src/accept/openssl.rs

@@ -1,47 +1,45 @@
+//! `openssl` based TLS acceptor service.
+//!
+//! See [`Acceptor`] for main service factory docs.
+
 use std::{
+    convert::Infallible,
     future::Future,
     io::{self, IoSlice},
-    ops::{Deref, DerefMut},
     pin::Pin,
     task::{Context, Poll},
+    time::Duration,
 };
 
 use actix_codec::{AsyncRead, AsyncWrite, ReadBuf};
-use actix_rt::net::{ActixStream, Ready};
+use actix_rt::{
+    net::{ActixStream, Ready},
+    time::{sleep, Sleep},
+};
 use actix_service::{Service, ServiceFactory};
-use actix_utils::counter::{Counter, CounterGuard};
-use futures_core::{future::LocalBoxFuture, ready};
+use actix_utils::{
+    counter::{Counter, CounterGuard},
+    future::{ready, Ready as FutReady},
+};
+use derive_more::{Deref, DerefMut, From};
+use openssl::ssl::{Error, Ssl, SslAcceptor};
+use pin_project_lite::pin_project;
+
+use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
+
+pub mod reexports {
+    //! Re-exports from `openssl` that are useful for acceptors.
 
     pub use openssl::ssl::{
-    AlpnError, Error as SslError, HandshakeError, Ssl, SslAcceptor, SslAcceptorBuilder,
+        AlpnError, Error, HandshakeError, Ssl, SslAcceptor, SslAcceptorBuilder,
     };
-
-use super::MAX_CONN_COUNTER;
-
-/// Wrapper type for `tokio_openssl::SslStream` in order to impl `ActixStream` trait.
-pub struct TlsStream<T>(tokio_openssl::SslStream<T>);
-
-impl<T> From<tokio_openssl::SslStream<T>> for TlsStream<T> {
-    fn from(stream: tokio_openssl::SslStream<T>) -> Self {
-        Self(stream)
-    }
 }
 
-impl<T> Deref for TlsStream<T> {
-    type Target = tokio_openssl::SslStream<T>;
+/// Wraps an `openssl` based async TLS stream in order to implement [`ActixStream`].
+#[derive(Deref, DerefMut, From)]
+pub struct TlsStream<IO>(tokio_openssl::SslStream<IO>);
 
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl<T> DerefMut for TlsStream<T> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
-
-impl<T: ActixStream> AsyncRead for TlsStream<T> {
+impl<IO: ActixStream> AsyncRead for TlsStream<IO> {
     fn poll_read(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
@@ -51,7 +49,7 @@ impl<T: ActixStream> AsyncRead for TlsStream<T> {
     }
 }
 
-impl<T: ActixStream> AsyncWrite for TlsStream<T> {
+impl<IO: ActixStream> AsyncWrite for TlsStream<IO> {
     fn poll_write(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
@@ -81,28 +79,38 @@ impl<T: ActixStream> AsyncWrite for TlsStream<T> {
     }
 }
 
-impl<T: ActixStream> ActixStream for TlsStream<T> {
+impl<IO: ActixStream> ActixStream for TlsStream<IO> {
     fn poll_read_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
-        T::poll_read_ready((&**self).get_ref(), cx)
+        IO::poll_read_ready((&**self).get_ref(), cx)
     }
 
     fn poll_write_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
-        T::poll_write_ready((&**self).get_ref(), cx)
+        IO::poll_write_ready((&**self).get_ref(), cx)
     }
 }
 
-/// Accept TLS connections via `openssl` package.
-///
-/// `openssl` feature enables this `Acceptor` type.
+/// Accept TLS connections via the `openssl` crate.
 pub struct Acceptor {
     acceptor: SslAcceptor,
+    handshake_timeout: Duration,
 }
 
 impl Acceptor {
-    /// Create OpenSSL based `Acceptor` service factory.
+    /// Create `openssl` based acceptor service factory.
     #[inline]
     pub fn new(acceptor: SslAcceptor) -> Self {
-        Acceptor { acceptor }
+        Acceptor {
+            acceptor,
+            handshake_timeout: DEFAULT_TLS_HANDSHAKE_TIMEOUT,
+        }
+    }
+
+    /// Limit the amount of time that the acceptor will wait for a TLS handshake to complete.
+    ///
+    /// Default timeout is 3 seconds.
+    pub fn set_handshake_timeout(&mut self, handshake_timeout: Duration) -> &mut Self {
+        self.handshake_timeout = handshake_timeout;
+        self
     }
 }
 
@@ -111,38 +119,43 @@ impl Clone for Acceptor {
     fn clone(&self) -> Self {
         Self {
             acceptor: self.acceptor.clone(),
+            handshake_timeout: self.handshake_timeout,
         }
     }
 }
 
-impl<T: ActixStream> ServiceFactory<T> for Acceptor {
-    type Response = TlsStream<T>;
-    type Error = SslError;
+impl<IO: ActixStream> ServiceFactory<IO> for Acceptor {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<Error, Infallible>;
     type Config = ();
     type Service = AcceptorService;
     type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
+    type Future = FutReady<Result<Self::Service, Self::InitError>>;
 
     fn new_service(&self, _: ()) -> Self::Future {
         let res = MAX_CONN_COUNTER.with(|conns| {
             Ok(AcceptorService {
                 acceptor: self.acceptor.clone(),
                 conns: conns.clone(),
+                handshake_timeout: self.handshake_timeout,
             })
         });
-        Box::pin(async { res })
+
+        ready(res)
     }
 }
 
+/// OpenSSL based acceptor service.
 pub struct AcceptorService {
     acceptor: SslAcceptor,
     conns: Counter,
+    handshake_timeout: Duration,
 }
 
-impl<T: ActixStream> Service<T> for AcceptorService {
-    type Response = TlsStream<T>;
-    type Error = SslError;
-    type Future = AcceptorServiceResponse<T>;
+impl<IO: ActixStream> Service<IO> for AcceptorService {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<Error, Infallible>;
+    type Future = AcceptFut<IO>;
 
     fn poll_ready(&self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         if self.conns.available(ctx) {
@@ -152,30 +165,43 @@ impl<T: ActixStream> Service<T> for AcceptorService {
         }
     }
 
-    fn call(&self, io: T) -> Self::Future {
+    fn call(&self, io: IO) -> Self::Future {
         let ssl_ctx = self.acceptor.context();
         let ssl = Ssl::new(ssl_ctx).expect("Provided SSL acceptor was invalid.");
-        AcceptorServiceResponse {
+
+        AcceptFut {
             _guard: self.conns.get(),
+            timeout: sleep(self.handshake_timeout),
             stream: Some(tokio_openssl::SslStream::new(ssl, io).unwrap()),
         }
     }
 }
 
-pub struct AcceptorServiceResponse<T: ActixStream> {
-    stream: Option<tokio_openssl::SslStream<T>>,
+pin_project! {
+    /// Accept future for OpenSSL service.
+    #[doc(hidden)]
+    pub struct AcceptFut<IO: ActixStream> {
+        stream: Option<tokio_openssl::SslStream<IO>>,
+        #[pin]
+        timeout: Sleep,
         _guard: CounterGuard,
     }
+}
 
-impl<T: ActixStream> Future for AcceptorServiceResponse<T> {
-    type Output = Result<TlsStream<T>, SslError>;
+impl<IO: ActixStream> Future for AcceptFut<IO> {
+    type Output = Result<TlsStream<IO>, TlsError<Error, Infallible>>;
 
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        ready!(Pin::new(self.stream.as_mut().unwrap()).poll_accept(cx))?;
-        Poll::Ready(Ok(self
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let this = self.project();
+
+        match Pin::new(this.stream.as_mut().unwrap()).poll_accept(cx) {
+            Poll::Ready(Ok(())) => Poll::Ready(Ok(this
                 .stream
                 .take()
-            .expect("SSL connect has resolved.")
-            .into()))
+                .expect("Acceptor should not be polled after it has completed.")
+                .into())),
+            Poll::Ready(Err(err)) => Poll::Ready(Err(TlsError::Tls(err))),
+            Poll::Pending => this.timeout.poll(cx).map(|_| Err(TlsError::Timeout)),
+        }
     }
 }

actix-tls/src/accept/rustls.rs

@@ -1,47 +1,45 @@
+//! `rustls` based TLS connection acceptor service.
+//!
+//! See [`Acceptor`] for main service factory docs.
+
 use std::{
+    convert::Infallible,
     future::Future,
     io::{self, IoSlice},
-    ops::{Deref, DerefMut},
     pin::Pin,
     sync::Arc,
     task::{Context, Poll},
+    time::Duration,
 };
 
 use actix_codec::{AsyncRead, AsyncWrite, ReadBuf};
-use actix_rt::net::{ActixStream, Ready};
+use actix_rt::{
+    net::{ActixStream, Ready},
+    time::{sleep, Sleep},
+};
 use actix_service::{Service, ServiceFactory};
-use actix_utils::counter::{Counter, CounterGuard};
-use futures_core::future::LocalBoxFuture;
+use actix_utils::{
+    counter::{Counter, CounterGuard},
+    future::{ready, Ready as FutReady},
+};
+use derive_more::{Deref, DerefMut, From};
+use pin_project_lite::pin_project;
+use tokio_rustls::rustls::ServerConfig;
 use tokio_rustls::{Accept, TlsAcceptor};
 
+use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
+
+pub mod reexports {
+    //! Re-exports from `rustls` that are useful for acceptors.
+
     pub use tokio_rustls::rustls::ServerConfig;
-
-use super::MAX_CONN_COUNTER;
-
-/// Wrapper type for `tokio_openssl::SslStream` in order to impl `ActixStream` trait.
-pub struct TlsStream<T>(tokio_rustls::server::TlsStream<T>);
-
-impl<T> From<tokio_rustls::server::TlsStream<T>> for TlsStream<T> {
-    fn from(stream: tokio_rustls::server::TlsStream<T>) -> Self {
-        Self(stream)
-    }
 }
 
-impl<T> Deref for TlsStream<T> {
-    type Target = tokio_rustls::server::TlsStream<T>;
+/// Wraps a `rustls` based async TLS stream in order to implement [`ActixStream`].
+#[derive(Deref, DerefMut, From)]
+pub struct TlsStream<IO>(tokio_rustls::server::TlsStream<IO>);
 
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl<T> DerefMut for TlsStream<T> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
-
-impl<T: ActixStream> AsyncRead for TlsStream<T> {
+impl<IO: ActixStream> AsyncRead for TlsStream<IO> {
     fn poll_read(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
@@ -51,7 +49,7 @@ impl<T: ActixStream> AsyncRead for TlsStream<T> {
     }
 }
 
-impl<T: ActixStream> AsyncWrite for TlsStream<T> {
+impl<IO: ActixStream> AsyncWrite for TlsStream<IO> {
     fn poll_write(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
@@ -81,72 +79,81 @@ impl<T: ActixStream> AsyncWrite for TlsStream<T> {
     }
 }
 
-impl<T: ActixStream> ActixStream for TlsStream<T> {
+impl<IO: ActixStream> ActixStream for TlsStream<IO> {
     fn poll_read_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
-        T::poll_read_ready((&**self).get_ref().0, cx)
+        IO::poll_read_ready((&**self).get_ref().0, cx)
     }
 
     fn poll_write_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
-        T::poll_write_ready((&**self).get_ref().0, cx)
+        IO::poll_write_ready((&**self).get_ref().0, cx)
     }
 }
 
-/// Accept TLS connections via `rustls` package.
-///
-/// `rustls` feature enables this `Acceptor` type.
+/// Accept TLS connections via the `rustls` crate.
 pub struct Acceptor {
     config: Arc<ServerConfig>,
+    handshake_timeout: Duration,
 }
 
 impl Acceptor {
-    /// Create Rustls based `Acceptor` service factory.
-    #[inline]
+    /// Constructs `rustls` based acceptor service factory.
     pub fn new(config: ServerConfig) -> Self {
         Acceptor {
             config: Arc::new(config),
+            handshake_timeout: DEFAULT_TLS_HANDSHAKE_TIMEOUT,
         }
     }
+
+    /// Limit the amount of time that the acceptor will wait for a TLS handshake to complete.
+    ///
+    /// Default timeout is 3 seconds.
+    pub fn set_handshake_timeout(&mut self, handshake_timeout: Duration) -> &mut Self {
+        self.handshake_timeout = handshake_timeout;
+        self
+    }
 }
 
 impl Clone for Acceptor {
-    #[inline]
     fn clone(&self) -> Self {
         Self {
             config: self.config.clone(),
+            handshake_timeout: self.handshake_timeout,
         }
     }
 }
 
-impl<T: ActixStream> ServiceFactory<T> for Acceptor {
-    type Response = TlsStream<T>;
-    type Error = io::Error;
+impl<IO: ActixStream> ServiceFactory<IO> for Acceptor {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<io::Error, Infallible>;
     type Config = ();
-
     type Service = AcceptorService;
     type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
+    type Future = FutReady<Result<Self::Service, Self::InitError>>;
 
     fn new_service(&self, _: ()) -> Self::Future {
         let res = MAX_CONN_COUNTER.with(|conns| {
             Ok(AcceptorService {
                 acceptor: self.config.clone().into(),
                 conns: conns.clone(),
+                handshake_timeout: self.handshake_timeout,
             })
         });
-        Box::pin(async { res })
+
+        ready(res)
     }
 }
 
-/// Rustls based `Acceptor` service
+/// Rustls based acceptor service.
 pub struct AcceptorService {
     acceptor: TlsAcceptor,
     conns: Counter,
+    handshake_timeout: Duration,
 }
 
-impl<T: ActixStream> Service<T> for AcceptorService {
-    type Response = TlsStream<T>;
-    type Error = io::Error;
-    type Future = AcceptorServiceFut<T>;
+impl<IO: ActixStream> Service<IO> for AcceptorService {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<io::Error, Infallible>;
+    type Future = AcceptFut<IO>;
 
     fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         if self.conns.available(cx) {
@@ -156,24 +163,35 @@ impl<T: ActixStream> Service<T> for AcceptorService {
         }
     }
 
-    fn call(&self, req: T) -> Self::Future {
-        AcceptorServiceFut {
-            _guard: self.conns.get(),
+    fn call(&self, req: IO) -> Self::Future {
+        AcceptFut {
             fut: self.acceptor.accept(req),
+            timeout: sleep(self.handshake_timeout),
+            _guard: self.conns.get(),
         }
     }
 }
 
-pub struct AcceptorServiceFut<T: ActixStream> {
-    fut: Accept<T>,
+pin_project! {
+    /// Accept future for Rustls service.
+    #[doc(hidden)]
+    pub struct AcceptFut<IO: ActixStream> {
+        fut: Accept<IO>,
+        #[pin]
+        timeout: Sleep,
         _guard: CounterGuard,
     }
+}
 
-impl<T: ActixStream> Future for AcceptorServiceFut<T> {
-    type Output = Result<TlsStream<T>, io::Error>;
+impl<IO: ActixStream> Future for AcceptFut<IO> {
+    type Output = Result<TlsStream<IO>, TlsError<io::Error, Infallible>>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.get_mut();
-        Pin::new(&mut this.fut).poll(cx).map_ok(TlsStream)
+        let mut this = self.project();
+        match Pin::new(&mut this.fut).poll(cx) {
+            Poll::Ready(Ok(stream)) => Poll::Ready(Ok(TlsStream(stream))),
+            Poll::Ready(Err(err)) => Poll::Ready(Err(TlsError::Tls(err))),
+            Poll::Pending => this.timeout.poll(cx).map(|_| Err(TlsError::Timeout)),
+        }
     }
 }

actix-tls/src/connect/connect.rs

@@ -1,350 +0,0 @@
-use std::{
-    collections::{vec_deque, VecDeque},
-    fmt,
-    iter::{self, FromIterator as _},
-    mem,
-    net::{IpAddr, SocketAddr},
-};
-
-/// Parse a host into parts (hostname and port).
-pub trait Address: Unpin + 'static {
-    /// Get hostname part.
-    fn hostname(&self) -> &str;
-
-    /// Get optional port part.
-    fn port(&self) -> Option<u16> {
-        None
-    }
-}
-
-impl Address for String {
-    fn hostname(&self) -> &str {
-        self
-    }
-}
-
-impl Address for &'static str {
-    fn hostname(&self) -> &str {
-        self
-    }
-}
-
-#[derive(Debug, Eq, PartialEq, Hash)]
-pub(crate) enum ConnectAddrs {
-    None,
-    One(SocketAddr),
-    Multi(VecDeque<SocketAddr>),
-}
-
-impl ConnectAddrs {
-    pub(crate) fn is_none(&self) -> bool {
-        matches!(self, Self::None)
-    }
-
-    pub(crate) fn is_some(&self) -> bool {
-        !self.is_none()
-    }
-}
-
-impl Default for ConnectAddrs {
-    fn default() -> Self {
-        Self::None
-    }
-}
-
-impl From<Option<SocketAddr>> for ConnectAddrs {
-    fn from(addr: Option<SocketAddr>) -> Self {
-        match addr {
-            Some(addr) => ConnectAddrs::One(addr),
-            None => ConnectAddrs::None,
-        }
-    }
-}
-
-/// Connection info.
-#[derive(Debug, PartialEq, Eq, Hash)]
-pub struct Connect<T> {
-    pub(crate) req: T,
-    pub(crate) port: u16,
-    pub(crate) addr: ConnectAddrs,
-    pub(crate) local_addr: Option<IpAddr>,
-}
-
-impl<T: Address> Connect<T> {
-    /// Create `Connect` instance by splitting the string by ':' and convert the second part to u16
-    pub fn new(req: T) -> Connect<T> {
-        let (_, port) = parse_host(req.hostname());
-
-        Connect {
-            req,
-            port: port.unwrap_or(0),
-            addr: ConnectAddrs::None,
-            local_addr: None,
-        }
-    }
-
-    /// Create new `Connect` instance from host and address. Connector skips name resolution stage
-    /// for such connect messages.
-    pub fn with_addr(req: T, addr: SocketAddr) -> Connect<T> {
-        Connect {
-            req,
-            port: 0,
-            addr: ConnectAddrs::One(addr),
-            local_addr: None,
-        }
-    }
-
-    /// Use port if address does not provide one.
-    ///
-    /// Default value is 0.
-    pub fn set_port(mut self, port: u16) -> Self {
-        self.port = port;
-        self
-    }
-
-    /// Set address.
-    pub fn set_addr(mut self, addr: Option<SocketAddr>) -> Self {
-        self.addr = ConnectAddrs::from(addr);
-        self
-    }
-
-    /// Set list of addresses.
-    pub fn set_addrs<I>(mut self, addrs: I) -> Self
-    where
-        I: IntoIterator<Item = SocketAddr>,
-    {
-        let mut addrs = VecDeque::from_iter(addrs);
-        self.addr = if addrs.len() < 2 {
-            ConnectAddrs::from(addrs.pop_front())
-        } else {
-            ConnectAddrs::Multi(addrs)
-        };
-        self
-    }
-
-    /// Set local_addr of connect.
-    pub fn set_local_addr(mut self, addr: impl Into<IpAddr>) -> Self {
-        self.local_addr = Some(addr.into());
-        self
-    }
-
-    /// Get hostname.
-    pub fn hostname(&self) -> &str {
-        self.req.hostname()
-    }
-
-    /// Get request port.
-    pub fn port(&self) -> u16 {
-        self.req.port().unwrap_or(self.port)
-    }
-
-    /// Get resolved request addresses.
-    pub fn addrs(&self) -> ConnectAddrsIter<'_> {
-        match self.addr {
-            ConnectAddrs::None => ConnectAddrsIter::None,
-            ConnectAddrs::One(addr) => ConnectAddrsIter::One(addr),
-            ConnectAddrs::Multi(ref addrs) => ConnectAddrsIter::Multi(addrs.iter()),
-        }
-    }
-
-    /// Take resolved request addresses.
-    pub fn take_addrs(&mut self) -> ConnectAddrsIter<'static> {
-        match mem::take(&mut self.addr) {
-            ConnectAddrs::None => ConnectAddrsIter::None,
-            ConnectAddrs::One(addr) => ConnectAddrsIter::One(addr),
-            ConnectAddrs::Multi(addrs) => ConnectAddrsIter::MultiOwned(addrs.into_iter()),
-        }
-    }
-}
-
-impl<T: Address> From<T> for Connect<T> {
-    fn from(addr: T) -> Self {
-        Connect::new(addr)
-    }
-}
-
-impl<T: Address> fmt::Display for Connect<T> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}:{}", self.hostname(), self.port())
-    }
-}
-
-/// Iterator over addresses in a [`Connect`] request.
-#[derive(Clone)]
-pub enum ConnectAddrsIter<'a> {
-    None,
-    One(SocketAddr),
-    Multi(vec_deque::Iter<'a, SocketAddr>),
-    MultiOwned(vec_deque::IntoIter<SocketAddr>),
-}
-
-impl Iterator for ConnectAddrsIter<'_> {
-    type Item = SocketAddr;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        match *self {
-            Self::None => None,
-            Self::One(addr) => {
-                *self = Self::None;
-                Some(addr)
-            }
-            Self::Multi(ref mut iter) => iter.next().copied(),
-            Self::MultiOwned(ref mut iter) => iter.next(),
-        }
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        match *self {
-            Self::None => (0, Some(0)),
-            Self::One(_) => (1, Some(1)),
-            Self::Multi(ref iter) => iter.size_hint(),
-            Self::MultiOwned(ref iter) => iter.size_hint(),
-        }
-    }
-}
-
-impl fmt::Debug for ConnectAddrsIter<'_> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_list().entries(self.clone()).finish()
-    }
-}
-
-impl iter::ExactSizeIterator for ConnectAddrsIter<'_> {}
-
-impl iter::FusedIterator for ConnectAddrsIter<'_> {}
-
-pub struct Connection<T, U> {
-    io: U,
-    req: T,
-}
-
-impl<T, U> Connection<T, U> {
-    pub fn new(io: U, req: T) -> Self {
-        Self { io, req }
-    }
-}
-
-impl<T, U> Connection<T, U> {
-    /// Reconstruct from a parts.
-    pub fn from_parts(io: U, req: T) -> Self {
-        Self { io, req }
-    }
-
-    /// Deconstruct into a parts.
-    pub fn into_parts(self) -> (U, T) {
-        (self.io, self.req)
-    }
-
-    /// Replace inclosed object, return new Stream and old object
-    pub fn replace_io<Y>(self, io: Y) -> (U, Connection<T, Y>) {
-        (self.io, Connection { io, req: self.req })
-    }
-
-    /// Returns a shared reference to the underlying stream.
-    pub fn io_ref(&self) -> &U {
-        &self.io
-    }
-
-    /// Returns a mutable reference to the underlying stream.
-    pub fn io_mut(&mut self) -> &mut U {
-        &mut self.io
-    }
-}
-
-impl<T: Address, U> Connection<T, U> {
-    /// Get hostname.
-    pub fn host(&self) -> &str {
-        self.req.hostname()
-    }
-}
-
-impl<T, U> std::ops::Deref for Connection<T, U> {
-    type Target = U;
-
-    fn deref(&self) -> &U {
-        &self.io
-    }
-}
-
-impl<T, U> std::ops::DerefMut for Connection<T, U> {
-    fn deref_mut(&mut self) -> &mut U {
-        &mut self.io
-    }
-}
-
-impl<T, U: fmt::Debug> fmt::Debug for Connection<T, U> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "Stream {{{:?}}}", self.io)
-    }
-}
-
-fn parse_host(host: &str) -> (&str, Option<u16>) {
-    let mut parts_iter = host.splitn(2, ':');
-
-    match parts_iter.next() {
-        Some(hostname) => {
-            let port_str = parts_iter.next().unwrap_or("");
-            let port = port_str.parse::<u16>().ok();
-            (hostname, port)
-        }
-
-        None => (host, None),
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use std::net::Ipv4Addr;
-
-    use super::*;
-
-    #[test]
-    fn test_host_parser() {
-        assert_eq!(parse_host("example.com"), ("example.com", None));
-        assert_eq!(parse_host("example.com:8080"), ("example.com", Some(8080)));
-        assert_eq!(parse_host("example:8080"), ("example", Some(8080)));
-        assert_eq!(parse_host("example.com:false"), ("example.com", None));
-        assert_eq!(parse_host("example.com:false:false"), ("example.com", None));
-    }
-
-    #[test]
-    fn test_addr_iter_multi() {
-        let localhost = SocketAddr::from((IpAddr::from(Ipv4Addr::LOCALHOST), 8080));
-        let unspecified = SocketAddr::from((IpAddr::from(Ipv4Addr::UNSPECIFIED), 8080));
-
-        let mut addrs = VecDeque::new();
-        addrs.push_back(localhost);
-        addrs.push_back(unspecified);
-
-        let mut iter = ConnectAddrsIter::Multi(addrs.iter());
-        assert_eq!(iter.next(), Some(localhost));
-        assert_eq!(iter.next(), Some(unspecified));
-        assert_eq!(iter.next(), None);
-
-        let mut iter = ConnectAddrsIter::MultiOwned(addrs.into_iter());
-        assert_eq!(iter.next(), Some(localhost));
-        assert_eq!(iter.next(), Some(unspecified));
-        assert_eq!(iter.next(), None);
-    }
-
-    #[test]
-    fn test_addr_iter_single() {
-        let localhost = SocketAddr::from((IpAddr::from(Ipv4Addr::LOCALHOST), 8080));
-
-        let mut iter = ConnectAddrsIter::One(localhost);
-        assert_eq!(iter.next(), Some(localhost));
-        assert_eq!(iter.next(), None);
-
-        let mut iter = ConnectAddrsIter::None;
-        assert_eq!(iter.next(), None);
-    }
-
-    #[test]
-    fn test_local_addr() {
-        let conn = Connect::new("hello").set_local_addr([127, 0, 0, 1]);
-        assert_eq!(
-            conn.local_addr.unwrap(),
-            IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1))
-        )
-    }
-}

actix-tls/src/connect/connect_addrs.rs

@@ -0,0 +1,82 @@
+use std::{
+    collections::{vec_deque, VecDeque},
+    fmt, iter,
+    net::SocketAddr,
+};
+
+#[derive(Debug, Clone, Eq, PartialEq, Hash)]
+pub(crate) enum ConnectAddrs {
+    None,
+    One(SocketAddr),
+    // TODO: consider using smallvec
+    Multi(VecDeque<SocketAddr>),
+}
+
+impl ConnectAddrs {
+    pub(crate) fn is_unresolved(&self) -> bool {
+        matches!(self, Self::None)
+    }
+
+    pub(crate) fn is_resolved(&self) -> bool {
+        !self.is_unresolved()
+    }
+}
+
+impl Default for ConnectAddrs {
+    fn default() -> Self {
+        Self::None
+    }
+}
+
+impl From<Option<SocketAddr>> for ConnectAddrs {
+    fn from(addr: Option<SocketAddr>) -> Self {
+        match addr {
+            Some(addr) => ConnectAddrs::One(addr),
+            None => ConnectAddrs::None,
+        }
+    }
+}
+
+/// Iterator over addresses in a [`Connect`] request.
+#[derive(Clone)]
+pub(crate) enum ConnectAddrsIter<'a> {
+    None,
+    One(SocketAddr),
+    Multi(vec_deque::Iter<'a, SocketAddr>),
+    MultiOwned(vec_deque::IntoIter<SocketAddr>),
+}
+
+impl Iterator for ConnectAddrsIter<'_> {
+    type Item = SocketAddr;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        match *self {
+            Self::None => None,
+            Self::One(addr) => {
+                *self = Self::None;
+                Some(addr)
+            }
+            Self::Multi(ref mut iter) => iter.next().copied(),
+            Self::MultiOwned(ref mut iter) => iter.next(),
+        }
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        match *self {
+            Self::None => (0, Some(0)),
+            Self::One(_) => (1, Some(1)),
+            Self::Multi(ref iter) => iter.size_hint(),
+            Self::MultiOwned(ref iter) => iter.size_hint(),
+        }
+    }
+}
+
+impl fmt::Debug for ConnectAddrsIter<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_list().entries(self.clone()).finish()
+    }
+}
+
+impl iter::ExactSizeIterator for ConnectAddrsIter<'_> {}
+
+impl iter::FusedIterator for ConnectAddrsIter<'_> {}

actix-tls/src/connect/connection.rs

@@ -0,0 +1,54 @@
+use derive_more::{Deref, DerefMut};
+
+use super::Host;
+
+/// Wraps underlying I/O and the connection request that initiated it.
+#[derive(Debug, Deref, DerefMut)]
+pub struct Connection<R, IO> {
+    pub(crate) req: R,
+
+    #[deref]
+    #[deref_mut]
+    pub(crate) io: IO,
+}
+
+impl<R, IO> Connection<R, IO> {
+    /// Construct new `Connection` from request and IO parts.
+    pub(crate) fn new(req: R, io: IO) -> Self {
+        Self { req, io }
+    }
+}
+
+impl<R, IO> Connection<R, IO> {
+    /// Deconstructs into IO and request parts.
+    pub fn into_parts(self) -> (IO, R) {
+        (self.io, self.req)
+    }
+
+    /// Replaces underlying IO, returning old IO and new `Connection`.
+    pub fn replace_io<IO2>(self, io: IO2) -> (IO, Connection<R, IO2>) {
+        (self.io, Connection { io, req: self.req })
+    }
+
+    /// Returns a shared reference to the underlying IO.
+    pub fn io_ref(&self) -> &IO {
+        &self.io
+    }
+
+    /// Returns a mutable reference to the underlying IO.
+    pub fn io_mut(&mut self) -> &mut IO {
+        &mut self.io
+    }
+
+    /// Returns a reference to the connection request.
+    pub fn request(&self) -> &R {
+        &self.req
+    }
+}
+
+impl<R: Host, IO> Connection<R, IO> {
+    /// Returns hostname.
+    pub fn hostname(&self) -> &str {
+        self.req.hostname()
+    }
+}

actix-tls/src/connect/connector.rs

@@ -1,194 +1,128 @@
 use std::{
-    collections::VecDeque,
     future::Future,
-    io,
-    net::{IpAddr, SocketAddr, SocketAddrV4, SocketAddrV6},
     pin::Pin,
     task::{Context, Poll},
 };
 
-use actix_rt::net::{TcpSocket, TcpStream};
+use actix_rt::net::TcpStream;
 use actix_service::{Service, ServiceFactory};
-use futures_core::{future::LocalBoxFuture, ready};
-use log::{error, trace};
-use tokio_util::sync::ReusableBoxFuture;
+use actix_utils::future::{ok, Ready};
+use futures_core::ready;
 
-use super::connect::{Address, Connect, ConnectAddrs, Connection};
-use super::error::ConnectError;
+use super::{
+    error::ConnectError,
+    resolver::{Resolver, ResolverService},
+    tcp::{TcpConnector, TcpConnectorService},
+    ConnectInfo, Connection, Host,
+};
 
-/// TCP connector service factory
-#[derive(Debug, Copy, Clone)]
-pub struct TcpConnectorFactory;
+/// Combined resolver and TCP connector service factory.
+///
+/// Used to create [`ConnectorService`]s which receive connection information, resolve DNS if
+/// required, and return a TCP stream.
+#[derive(Clone, Default)]
+pub struct Connector {
+    resolver: Resolver,
+}
 
-impl TcpConnectorFactory {
-    /// Create TCP connector service
-    pub fn service(&self) -> TcpConnector {
-        TcpConnector
+impl Connector {
+    /// Constructs new connector factory with the given resolver.
+    pub fn new(resolver: Resolver) -> Self {
+        Connector { resolver }
+    }
+
+    /// Build connector service.
+    pub fn service(&self) -> ConnectorService {
+        ConnectorService {
+            tcp: TcpConnector::default().service(),
+            resolver: self.resolver.service(),
+        }
     }
 }
 
-impl<T: Address> ServiceFactory<Connect<T>> for TcpConnectorFactory {
-    type Response = Connection<T, TcpStream>;
+impl<R: Host> ServiceFactory<ConnectInfo<R>> for Connector {
+    type Response = Connection<R, TcpStream>;
     type Error = ConnectError;
     type Config = ();
-    type Service = TcpConnector;
+    type Service = ConnectorService;
     type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
+    type Future = Ready<Result<Self::Service, Self::InitError>>;
 
     fn new_service(&self, _: ()) -> Self::Future {
-        let service = self.service();
-        Box::pin(async move { Ok(service) })
+        ok(self.service())
     }
 }
 
-/// TCP connector service
-#[derive(Debug, Copy, Clone)]
-pub struct TcpConnector;
+/// Combined resolver and TCP connector service.
+///
+/// Service implementation receives connection information, resolves DNS if required, and returns
+/// a TCP stream.
+#[derive(Clone, Default)]
+pub struct ConnectorService {
+    tcp: TcpConnectorService,
+    resolver: ResolverService,
+}
 
-impl<T: Address> Service<Connect<T>> for TcpConnector {
-    type Response = Connection<T, TcpStream>;
+impl<R: Host> Service<ConnectInfo<R>> for ConnectorService {
+    type Response = Connection<R, TcpStream>;
     type Error = ConnectError;
-    type Future = TcpConnectorResponse<T>;
+    type Future = ConnectServiceResponse<R>;
 
     actix_service::always_ready!();
 
-    fn call(&self, req: Connect<T>) -> Self::Future {
-        let port = req.port();
-        let Connect {
-            req,
-            addr,
-            local_addr,
-            ..
-        } = req;
-
-        TcpConnectorResponse::new(req, port, local_addr, addr)
+    fn call(&self, req: ConnectInfo<R>) -> Self::Future {
+        ConnectServiceResponse {
+            fut: ConnectFut::Resolve(self.resolver.call(req)),
+            tcp: self.tcp,
+        }
     }
 }
 
-/// TCP stream connector response future
-pub enum TcpConnectorResponse<T> {
-    Response {
-        req: Option<T>,
-        port: u16,
-        local_addr: Option<IpAddr>,
-        addrs: Option<VecDeque<SocketAddr>>,
-        stream: ReusableBoxFuture<Result<TcpStream, io::Error>>,
-    },
-    Error(Option<ConnectError>),
+/// Chains futures of resolve and connect steps.
+pub(crate) enum ConnectFut<R: Host> {
+    Resolve(<ResolverService as Service<ConnectInfo<R>>>::Future),
+    Connect(<TcpConnectorService as Service<ConnectInfo<R>>>::Future),
 }
 
-impl<T: Address> TcpConnectorResponse<T> {
-    pub(crate) fn new(
-        req: T,
-        port: u16,
-        local_addr: Option<IpAddr>,
-        addr: ConnectAddrs,
-    ) -> TcpConnectorResponse<T> {
-        if addr.is_none() {
-            error!("TCP connector: unresolved connection address");
-            return TcpConnectorResponse::Error(Some(ConnectError::Unresolved));
+/// Container for the intermediate states of [`ConnectFut`].
+pub(crate) enum ConnectFutState<R: Host> {
+    Resolved(ConnectInfo<R>),
+    Connected(Connection<R, TcpStream>),
 }
 
-        trace!(
-            "TCP connector: connecting to {} on port {}",
-            req.hostname(),
-            port
-        );
-
-        match addr {
-            ConnectAddrs::None => unreachable!("none variant already checked"),
-
-            ConnectAddrs::One(addr) => TcpConnectorResponse::Response {
-                req: Some(req),
-                port,
-                local_addr,
-                addrs: None,
-                stream: ReusableBoxFuture::new(connect(addr, local_addr)),
-            },
-
-            // when resolver returns multiple socket addr for request they would be popped from
-            // front end of queue and returns with the first successful tcp connection.
-            ConnectAddrs::Multi(mut addrs) => {
-                let addr = addrs.pop_front().unwrap();
-
-                TcpConnectorResponse::Response {
-                    req: Some(req),
-                    port,
-                    local_addr,
-                    addrs: Some(addrs),
-                    stream: ReusableBoxFuture::new(connect(addr, local_addr)),
+impl<R: Host> ConnectFut<R> {
+    fn poll_connect(
+        &mut self,
+        cx: &mut Context<'_>,
+    ) -> Poll<Result<ConnectFutState<R>, ConnectError>> {
+        match self {
+            ConnectFut::Resolve(ref mut fut) => {
+                Pin::new(fut).poll(cx).map_ok(ConnectFutState::Resolved)
             }
+
+            ConnectFut::Connect(ref mut fut) => {
+                Pin::new(fut).poll(cx).map_ok(ConnectFutState::Connected)
             }
         }
     }
 }
 
-impl<T: Address> Future for TcpConnectorResponse<T> {
-    type Output = Result<Connection<T, TcpStream>, ConnectError>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        match self.get_mut() {
-            TcpConnectorResponse::Error(err) => Poll::Ready(Err(err.take().unwrap())),
-
-            TcpConnectorResponse::Response {
-                req,
-                port,
-                local_addr,
-                addrs,
-                stream,
-            } => loop {
-                match ready!(stream.poll(cx)) {
-                    Ok(sock) => {
-                        let req = req.take().unwrap();
-                        trace!(
-                            "TCP connector: successfully connected to {:?} - {:?}",
-                            req.hostname(),
-                            sock.peer_addr()
-                        );
-                        return Poll::Ready(Ok(Connection::new(sock, req)));
+pub struct ConnectServiceResponse<R: Host> {
+    fut: ConnectFut<R>,
+    tcp: TcpConnectorService,
 }
 
-                    Err(err) => {
-                        trace!(
-                            "TCP connector: failed to connect to {:?} port: {}",
-                            req.as_ref().unwrap().hostname(),
-                            port,
-                        );
+impl<R: Host> Future for ConnectServiceResponse<R> {
+    type Output = Result<Connection<R, TcpStream>, ConnectError>;
 
-                        if let Some(addr) = addrs.as_mut().and_then(|addrs| addrs.pop_front()) {
-                            stream.set(connect(addr, *local_addr));
-                        } else {
-                            return Poll::Ready(Err(ConnectError::Io(err)));
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        loop {
+            match ready!(self.fut.poll_connect(cx))? {
+                ConnectFutState::Resolved(res) => {
+                    self.fut = ConnectFut::Connect(self.tcp.call(res));
+                }
+                ConnectFutState::Connected(res) => return Poll::Ready(Ok(res)),
             }
         }
     }
-            },
-        }
-    }
-}
-
-async fn connect(addr: SocketAddr, local_addr: Option<IpAddr>) -> io::Result<TcpStream> {
-    // use local addr if connect asks for it.
-    match local_addr {
-        Some(ip_addr) => {
-            let socket = match ip_addr {
-                IpAddr::V4(ip_addr) => {
-                    let socket = TcpSocket::new_v4()?;
-                    let addr = SocketAddr::V4(SocketAddrV4::new(ip_addr, 0));
-                    socket.bind(addr)?;
-                    socket
-                }
-                IpAddr::V6(ip_addr) => {
-                    let socket = TcpSocket::new_v6()?;
-                    let addr = SocketAddr::V6(SocketAddrV6::new(ip_addr, 0, 0, 0));
-                    socket.bind(addr)?;
-                    socket
-                }
-            };
-
-            socket.connect(addr).await
-        }
-
-        None => TcpStream::connect(addr).await,
-    }
 }

actix-tls/src/connect/error.rs

@@ -1,15 +1,16 @@
-use std::io;
+use std::{error::Error, io};
 
 use derive_more::Display;
 
+/// Errors that can result from using a connector service.
 #[derive(Debug, Display)]
 pub enum ConnectError {
     /// Failed to resolve the hostname
-    #[display(fmt = "Failed resolving hostname: {}", _0)]
+    #[display(fmt = "Failed resolving hostname")]
     Resolver(Box<dyn std::error::Error>),
 
-    /// No dns records
-    #[display(fmt = "No dns records found for the input")]
+    /// No DNS records
+    #[display(fmt = "No DNS records found for the input")]
     NoRecords,
 
     /// Invalid input
@@ -23,3 +24,13 @@ pub enum ConnectError {
     #[display(fmt = "{}", _0)]
     Io(io::Error),
 }
+
+impl Error for ConnectError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self {
+            Self::Resolver(err) => Some(&**err),
+            Self::Io(err) => Some(err),
+            Self::NoRecords | Self::InvalidInput | Self::Unresolved => None,
+        }
+    }
+}

actix-tls/src/connect/host.rs

@@ -0,0 +1,71 @@
+//! The [`Host`] trait.
+
+/// An interface for types where host parts (hostname and port) can be derived.
+///
+/// The [WHATWG URL Standard] defines the terminology used for this trait and its methods.
+///
+/// ```plain
+/// +------------------------+
+/// |          host          |
+/// +-----------------+------+
+/// |    hostname     | port |
+/// |                 |      |
+/// | sub.example.com : 8080 |
+/// +-----------------+------+
+/// ```
+///
+/// [WHATWG URL Standard]: https://url.spec.whatwg.org/
+pub trait Host: Unpin + 'static {
+    /// Extract hostname.
+    fn hostname(&self) -> &str;
+
+    /// Extract optional port.
+    fn port(&self) -> Option<u16> {
+        None
+    }
+}
+
+impl Host for String {
+    fn hostname(&self) -> &str {
+        self.split_once(':')
+            .map(|(hostname, _)| hostname)
+            .unwrap_or(self)
+    }
+
+    fn port(&self) -> Option<u16> {
+        self.split_once(':').and_then(|(_, port)| port.parse().ok())
+    }
+}
+
+impl Host for &'static str {
+    fn hostname(&self) -> &str {
+        self.split_once(':')
+            .map(|(hostname, _)| hostname)
+            .unwrap_or(self)
+    }
+
+    fn port(&self) -> Option<u16> {
+        self.split_once(':').and_then(|(_, port)| port.parse().ok())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    macro_rules! assert_connection_info_eq {
+        ($req:expr, $hostname:expr, $port:expr) => {{
+            assert_eq!($req.hostname(), $hostname);
+            assert_eq!($req.port(), $port);
+        }};
+    }
+
+    #[test]
+    fn host_parsing() {
+        assert_connection_info_eq!("example.com", "example.com", None);
+        assert_connection_info_eq!("example.com:8080", "example.com", Some(8080));
+        assert_connection_info_eq!("example:8080", "example", Some(8080));
+        assert_connection_info_eq!("example.com:false", "example.com", None);
+        assert_connection_info_eq!("example.com:false:false", "example.com", None);
+    }
+}

actix-tls/src/connect/info.rs

@@ -0,0 +1,249 @@
+//! Connection info struct.
+
+use std::{
+    collections::VecDeque,
+    fmt,
+    iter::{self, FromIterator as _},
+    mem,
+    net::{IpAddr, SocketAddr},
+};
+
+use super::{
+    connect_addrs::{ConnectAddrs, ConnectAddrsIter},
+    Host,
+};
+
+/// Connection request information.
+///
+/// May contain known/pre-resolved socket address(es) or a host that needs resolving with DNS.
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub struct ConnectInfo<R> {
+    pub(crate) request: R,
+    pub(crate) port: u16,
+    pub(crate) addr: ConnectAddrs,
+    pub(crate) local_addr: Option<IpAddr>,
+}
+
+impl<R: Host> ConnectInfo<R> {
+    /// Constructs new connection info using a request.
+    pub fn new(request: R) -> ConnectInfo<R> {
+        let port = request.port();
+
+        ConnectInfo {
+            request,
+            port: port.unwrap_or(0),
+            addr: ConnectAddrs::None,
+            local_addr: None,
+        }
+    }
+
+    /// Constructs new connection info from request and known socket address.
+    ///
+    /// Since socket address is known, [`Connector`](super::Connector) will skip the DNS
+    /// resolution step.
+    pub fn with_addr(request: R, addr: SocketAddr) -> ConnectInfo<R> {
+        ConnectInfo {
+            request,
+            port: 0,
+            addr: ConnectAddrs::One(addr),
+            local_addr: None,
+        }
+    }
+
+    /// Set connection port.
+    ///
+    /// If request provided a port, this will override it.
+    pub fn set_port(mut self, port: u16) -> Self {
+        self.port = port;
+        self
+    }
+
+    /// Set connection socket address.
+    pub fn set_addr(mut self, addr: impl Into<Option<SocketAddr>>) -> Self {
+        self.addr = ConnectAddrs::from(addr.into());
+        self
+    }
+
+    /// Set list of addresses.
+    pub fn set_addrs<I>(mut self, addrs: I) -> Self
+    where
+        I: IntoIterator<Item = SocketAddr>,
+    {
+        let mut addrs = VecDeque::from_iter(addrs);
+        self.addr = if addrs.len() < 2 {
+            ConnectAddrs::from(addrs.pop_front())
+        } else {
+            ConnectAddrs::Multi(addrs)
+        };
+        self
+    }
+
+    /// Set local address to connection with.
+    ///
+    /// Useful in situations where the IP address bound to a particular network interface is known.
+    /// This would make sure the socket is opened through that interface.
+    pub fn set_local_addr(mut self, addr: impl Into<IpAddr>) -> Self {
+        self.local_addr = Some(addr.into());
+        self
+    }
+
+    /// Returns a reference to the connection request.
+    pub fn request(&self) -> &R {
+        &self.request
+    }
+
+    /// Returns request hostname.
+    pub fn hostname(&self) -> &str {
+        self.request.hostname()
+    }
+
+    /// Returns request port.
+    pub fn port(&self) -> u16 {
+        self.request.port().unwrap_or(self.port)
+    }
+
+    /// Get borrowed iterator of resolved request addresses.
+    ///
+    /// # Examples
+    /// ```
+    /// # use std::net::SocketAddr;
+    /// # use actix_tls::connect::ConnectInfo;
+    /// let addr = SocketAddr::from(([127, 0, 0, 1], 4242));
+    ///
+    /// let conn = ConnectInfo::new("localhost");
+    /// let mut addrs = conn.addrs();
+    /// assert!(addrs.next().is_none());
+    ///
+    /// let conn = ConnectInfo::with_addr("localhost", addr);
+    /// let mut addrs = conn.addrs();
+    /// assert_eq!(addrs.next().unwrap(), addr);
+    /// ```
+    pub fn addrs(
+        &self,
+    ) -> impl Iterator<Item = SocketAddr>
+           + ExactSizeIterator
+           + iter::FusedIterator
+           + Clone
+           + fmt::Debug
+           + '_ {
+        match self.addr {
+            ConnectAddrs::None => ConnectAddrsIter::None,
+            ConnectAddrs::One(addr) => ConnectAddrsIter::One(addr),
+            ConnectAddrs::Multi(ref addrs) => ConnectAddrsIter::Multi(addrs.iter()),
+        }
+    }
+
+    /// Take owned iterator resolved request addresses.
+    ///
+    /// # Examples
+    /// ```
+    /// # use std::net::SocketAddr;
+    /// # use actix_tls::connect::ConnectInfo;
+    /// let addr = SocketAddr::from(([127, 0, 0, 1], 4242));
+    ///
+    /// let mut conn = ConnectInfo::new("localhost");
+    /// let mut addrs = conn.take_addrs();
+    /// assert!(addrs.next().is_none());
+    ///
+    /// let mut conn = ConnectInfo::with_addr("localhost", addr);
+    /// let mut addrs = conn.take_addrs();
+    /// assert_eq!(addrs.next().unwrap(), addr);
+    /// ```
+    pub fn take_addrs(
+        &mut self,
+    ) -> impl Iterator<Item = SocketAddr>
+           + ExactSizeIterator
+           + iter::FusedIterator
+           + Clone
+           + fmt::Debug
+           + 'static {
+        match mem::take(&mut self.addr) {
+            ConnectAddrs::None => ConnectAddrsIter::None,
+            ConnectAddrs::One(addr) => ConnectAddrsIter::One(addr),
+            ConnectAddrs::Multi(addrs) => ConnectAddrsIter::MultiOwned(addrs.into_iter()),
+        }
+    }
+}
+
+impl<R: Host> From<R> for ConnectInfo<R> {
+    fn from(addr: R) -> Self {
+        ConnectInfo::new(addr)
+    }
+}
+
+impl<R: Host> fmt::Display for ConnectInfo<R> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}:{}", self.hostname(), self.port())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::net::Ipv4Addr;
+
+    use super::*;
+
+    #[test]
+    fn test_addr_iter_multi() {
+        let localhost = SocketAddr::from((IpAddr::from(Ipv4Addr::LOCALHOST), 8080));
+        let unspecified = SocketAddr::from((IpAddr::from(Ipv4Addr::UNSPECIFIED), 8080));
+
+        let mut addrs = VecDeque::new();
+        addrs.push_back(localhost);
+        addrs.push_back(unspecified);
+
+        let mut iter = ConnectAddrsIter::Multi(addrs.iter());
+        assert_eq!(iter.next(), Some(localhost));
+        assert_eq!(iter.next(), Some(unspecified));
+        assert_eq!(iter.next(), None);
+
+        let mut iter = ConnectAddrsIter::MultiOwned(addrs.into_iter());
+        assert_eq!(iter.next(), Some(localhost));
+        assert_eq!(iter.next(), Some(unspecified));
+        assert_eq!(iter.next(), None);
+    }
+
+    #[test]
+    fn test_addr_iter_single() {
+        let localhost = SocketAddr::from((IpAddr::from(Ipv4Addr::LOCALHOST), 8080));
+
+        let mut iter = ConnectAddrsIter::One(localhost);
+        assert_eq!(iter.next(), Some(localhost));
+        assert_eq!(iter.next(), None);
+
+        let mut iter = ConnectAddrsIter::None;
+        assert_eq!(iter.next(), None);
+    }
+
+    #[test]
+    fn test_local_addr() {
+        let conn = ConnectInfo::new("hello").set_local_addr([127, 0, 0, 1]);
+        assert_eq!(
+            conn.local_addr.unwrap(),
+            IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1))
+        )
+    }
+
+    #[test]
+    fn request_ref() {
+        let conn = ConnectInfo::new("hello");
+        assert_eq!(conn.request(), &"hello")
+    }
+
+    #[test]
+    fn set_connect_addr_into_option() {
+        let addr = SocketAddr::from(([127, 0, 0, 1], 4242));
+
+        let conn = ConnectInfo::new("hello").set_addr(None);
+        let mut addrs = conn.addrs();
+        assert!(addrs.next().is_none());
+
+        let conn = ConnectInfo::new("hello").set_addr(addr);
+        let mut addrs = conn.addrs();
+        assert_eq!(addrs.next().unwrap(), addr);
+
+        let conn = ConnectInfo::new("hello").set_addr(Some(addr));
+        let mut addrs = conn.addrs();
+        assert_eq!(addrs.next().unwrap(), addr);
+    }
+}

actix-tls/src/connect/mod.rs

@@ -1,74 +1,46 @@
-//! TCP connector services for Actix ecosystem.
+//! TCP and TLS connector services.
 //!
 //! # Stages of the TCP connector service:
-//! - Resolve [`Address`] with given [`Resolver`] and collect list of socket addresses.
-//! - Establish TCP connection and return [`TcpStream`].
+//! 1. Resolve [`Host`] (if needed) with given [`Resolver`] and collect list of socket addresses.
+//! 1. Establish TCP connection and return [`TcpStream`].
 //!
 //! # Stages of TLS connector services:
-//! - Establish [`TcpStream`] with connector service.
-//! - Wrap the stream and perform connect handshake with remote peer.
-//! - Return certain stream type that impls `AsyncRead` and `AsyncWrite`.
-//!
-//! # Package feature
-//! * `openssl` - enables TLS support via `openssl` crate
-//! * `rustls` - enables TLS support via `rustls` crate
+//! 1. Resolve DNS and establish a [`TcpStream`] with the TCP connector service.
+//! 1. Wrap the stream and perform connect handshake with remote peer.
+//! 1. Return wrapped stream type that implements `AsyncRead` and `AsyncWrite`.
 //!
 //! [`TcpStream`]: actix_rt::net::TcpStream
 
-#[allow(clippy::module_inception)]
-mod connect;
+mod connect_addrs;
+mod connection;
 mod connector;
 mod error;
+mod host;
+mod info;
 mod resolve;
-mod service;
-pub mod ssl;
+mod resolver;
+pub mod tcp;
+
 #[cfg(feature = "uri")]
+#[cfg_attr(docsrs, doc(cfg(feature = "uri")))]
 mod uri;
 
-use actix_rt::net::TcpStream;
-use actix_service::{Service, ServiceFactory};
+#[cfg(feature = "openssl")]
+#[cfg_attr(docsrs, doc(cfg(feature = "openssl")))]
+pub mod openssl;
 
-pub use self::connect::{Address, Connect, Connection};
-pub use self::connector::{TcpConnector, TcpConnectorFactory};
+#[cfg(feature = "rustls")]
+#[cfg_attr(docsrs, doc(cfg(feature = "rustls")))]
+pub mod rustls;
+
+#[cfg(feature = "native-tls")]
+#[cfg_attr(docsrs, doc(cfg(feature = "native-tls")))]
+pub mod native_tls;
+
+pub use self::connection::Connection;
+pub use self::connector::{Connector, ConnectorService};
 pub use self::error::ConnectError;
-pub use self::resolve::{Resolve, Resolver, ResolverFactory};
-pub use self::service::{ConnectService, ConnectServiceFactory};
-
-/// Create TCP connector service.
-pub fn new_connector<T: Address + 'static>(
-    resolver: Resolver,
-) -> impl Service<Connect<T>, Response = Connection<T, TcpStream>, Error = ConnectError> + Clone
-{
-    ConnectServiceFactory::new(resolver).service()
-}
-
-/// Create TCP connector service factory.
-pub fn new_connector_factory<T: Address + 'static>(
-    resolver: Resolver,
-) -> impl ServiceFactory<
-    Connect<T>,
-    Config = (),
-    Response = Connection<T, TcpStream>,
-    Error = ConnectError,
-    InitError = (),
-> + Clone {
-    ConnectServiceFactory::new(resolver)
-}
-
-/// Create connector service with default parameters.
-pub fn default_connector<T: Address + 'static>(
-) -> impl Service<Connect<T>, Response = Connection<T, TcpStream>, Error = ConnectError> + Clone
-{
-    new_connector(Resolver::Default)
-}
-
-/// Create connector service factory with default parameters.
-pub fn default_connector_factory<T: Address + 'static>() -> impl ServiceFactory<
-    Connect<T>,
-    Config = (),
-    Response = Connection<T, TcpStream>,
-    Error = ConnectError,
-    InitError = (),
-> + Clone {
-    new_connector_factory(Resolver::Default)
-}
+pub use self::host::Host;
+pub use self::info::ConnectInfo;
+pub use self::resolve::Resolve;
+pub use self::resolver::{Resolver, ResolverService};

actix-tls/src/connect/native_tls.rs

@@ -0,0 +1,92 @@
+//! Native-TLS based connector service.
+//!
+//! See [`TlsConnector`] for main connector service factory docs.
+
+use std::io;
+
+use actix_rt::net::ActixStream;
+use actix_service::{Service, ServiceFactory};
+use actix_utils::future::{ok, Ready};
+use futures_core::future::LocalBoxFuture;
+use log::trace;
+use tokio_native_tls::{
+    native_tls::TlsConnector as NativeTlsConnector, TlsConnector as AsyncNativeTlsConnector,
+    TlsStream as AsyncTlsStream,
+};
+
+use crate::connect::{Connection, Host};
+
+pub mod reexports {
+    //! Re-exports from `native-tls` and `tokio-native-tls` that are useful for connectors.
+
+    pub use tokio_native_tls::native_tls::TlsConnector;
+
+    pub use tokio_native_tls::TlsStream as AsyncTlsStream;
+}
+
+/// Connector service and factory using `native-tls`.
+#[derive(Clone)]
+pub struct TlsConnector {
+    connector: AsyncNativeTlsConnector,
+}
+
+impl TlsConnector {
+    /// Constructs new connector service from a `native-tls` connector.
+    ///
+    /// This type is it's own service factory, so it can be used in that setting, too.
+    pub fn new(connector: NativeTlsConnector) -> Self {
+        Self {
+            connector: AsyncNativeTlsConnector::from(connector),
+        }
+    }
+}
+
+impl<R: Host, IO> ServiceFactory<Connection<R, IO>> for TlsConnector
+where
+    IO: ActixStream + 'static,
+{
+    type Response = Connection<R, AsyncTlsStream<IO>>;
+    type Error = io::Error;
+    type Config = ();
+    type Service = Self;
+    type InitError = ();
+    type Future = Ready<Result<Self::Service, Self::InitError>>;
+
+    fn new_service(&self, _: ()) -> Self::Future {
+        ok(self.clone())
+    }
+}
+
+/// The `native-tls` connector is both it's ServiceFactory and Service impl type.
+/// As the factory and service share the same type and state.
+impl<R, IO> Service<Connection<R, IO>> for TlsConnector
+where
+    R: Host,
+    IO: ActixStream + 'static,
+{
+    type Response = Connection<R, AsyncTlsStream<IO>>;
+    type Error = io::Error;
+    type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
+
+    actix_service::always_ready!();
+
+    fn call(&self, stream: Connection<R, IO>) -> Self::Future {
+        let (io, stream) = stream.replace_io(());
+        let connector = self.connector.clone();
+
+        Box::pin(async move {
+            trace!("SSL Handshake start for: {:?}", stream.hostname());
+            connector
+                .connect(stream.hostname(), io)
+                .await
+                .map(|res| {
+                    trace!("SSL Handshake success: {:?}", stream.hostname());
+                    stream.replace_io(res).1
+                })
+                .map_err(|e| {
+                    trace!("SSL Handshake error: {:?}", e);
+                    io::Error::new(io::ErrorKind::Other, format!("{}", e))
+                })
+        })
+    }
+}

actix-tls/src/connect/openssl.rs

@@ -0,0 +1,148 @@
+//! OpenSSL based connector service.
+//!
+//! See [`TlsConnector`] for main connector service factory docs.
+
+use std::{
+    future::Future,
+    io,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use actix_rt::net::ActixStream;
+use actix_service::{Service, ServiceFactory};
+use actix_utils::future::{ok, Ready};
+use futures_core::ready;
+use log::trace;
+use openssl::ssl::SslConnector;
+use tokio_openssl::SslStream as AsyncSslStream;
+
+use crate::connect::{Connection, Host};
+
+pub mod reexports {
+    //! Re-exports from `openssl` and `tokio-openssl` that are useful for connectors.
+
+    pub use openssl::ssl::{Error, HandshakeError, SslConnector, SslMethod};
+
+    pub use tokio_openssl::SslStream as AsyncSslStream;
+}
+
+/// Connector service factory using `openssl`.
+pub struct TlsConnector {
+    connector: SslConnector,
+}
+
+impl TlsConnector {
+    /// Constructs new connector service factory from an `openssl` connector.
+    pub fn new(connector: SslConnector) -> Self {
+        TlsConnector { connector }
+    }
+
+    /// Constructs new connector service from an `openssl` connector.
+    pub fn service(connector: SslConnector) -> TlsConnectorService {
+        TlsConnectorService { connector }
+    }
+}
+
+impl Clone for TlsConnector {
+    fn clone(&self) -> Self {
+        Self {
+            connector: self.connector.clone(),
+        }
+    }
+}
+
+impl<R, IO> ServiceFactory<Connection<R, IO>> for TlsConnector
+where
+    R: Host,
+    IO: ActixStream + 'static,
+{
+    type Response = Connection<R, AsyncSslStream<IO>>;
+    type Error = io::Error;
+    type Config = ();
+    type Service = TlsConnectorService;
+    type InitError = ();
+    type Future = Ready<Result<Self::Service, Self::InitError>>;
+
+    fn new_service(&self, _: ()) -> Self::Future {
+        ok(TlsConnectorService {
+            connector: self.connector.clone(),
+        })
+    }
+}
+
+/// Connector service using `openssl`.
+pub struct TlsConnectorService {
+    connector: SslConnector,
+}
+
+impl Clone for TlsConnectorService {
+    fn clone(&self) -> Self {
+        Self {
+            connector: self.connector.clone(),
+        }
+    }
+}
+
+impl<R, IO> Service<Connection<R, IO>> for TlsConnectorService
+where
+    R: Host,
+    IO: ActixStream,
+{
+    type Response = Connection<R, AsyncSslStream<IO>>;
+    type Error = io::Error;
+    type Future = ConnectFut<R, IO>;
+
+    actix_service::always_ready!();
+
+    fn call(&self, stream: Connection<R, IO>) -> Self::Future {
+        trace!("SSL Handshake start for: {:?}", stream.hostname());
+        let (io, stream) = stream.replace_io(());
+        let host = stream.hostname();
+
+        let config = self
+            .connector
+            .configure()
+            .expect("SSL connect configuration was invalid.");
+
+        let ssl = config
+            .into_ssl(host)
+            .expect("SSL connect configuration was invalid.");
+
+        ConnectFut {
+            io: Some(AsyncSslStream::new(ssl, io).unwrap()),
+            stream: Some(stream),
+        }
+    }
+}
+
+/// Connect future for OpenSSL service.
+#[doc(hidden)]
+pub struct ConnectFut<R, IO> {
+    io: Option<AsyncSslStream<IO>>,
+    stream: Option<Connection<R, ()>>,
+}
+
+impl<R: Host, IO> Future for ConnectFut<R, IO>
+where
+    R: Host,
+    IO: ActixStream,
+{
+    type Output = Result<Connection<R, AsyncSslStream<IO>>, io::Error>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let this = self.get_mut();
+
+        match ready!(Pin::new(this.io.as_mut().unwrap()).poll_connect(cx)) {
+            Ok(_) => {
+                let stream = this.stream.take().unwrap();
+                trace!("SSL Handshake success: {:?}", stream.hostname());
+                Poll::Ready(Ok(stream.replace_io(this.io.take().unwrap()).1))
+            }
+            Err(e) => {
+                trace!("SSL Handshake error: {:?}", e);
+                Poll::Ready(Err(io::Error::new(io::ErrorKind::Other, format!("{}", e))))
+            }
+        }
+    }
+}

actix-tls/src/connect/resolve.rs

@@ -1,61 +1,12 @@
-use std::{
-    future::Future,
-    io,
-    net::SocketAddr,
-    pin::Pin,
-    rc::Rc,
-    task::{Context, Poll},
-    vec::IntoIter,
-};
+//! The [`Resolve`] trait.
 
-use actix_rt::task::{spawn_blocking, JoinHandle};
-use actix_service::{Service, ServiceFactory};
-use futures_core::{future::LocalBoxFuture, ready};
-use log::trace;
+use std::{error::Error as StdError, net::SocketAddr};
 
-use super::connect::{Address, Connect};
-use super::error::ConnectError;
+use futures_core::future::LocalBoxFuture;
 
-/// DNS Resolver Service Factory
-#[derive(Clone)]
-pub struct ResolverFactory {
-    resolver: Resolver,
-}
-
-impl ResolverFactory {
-    pub fn new(resolver: Resolver) -> Self {
-        Self { resolver }
-    }
-
-    pub fn service(&self) -> Resolver {
-        self.resolver.clone()
-    }
-}
-
-impl<T: Address> ServiceFactory<Connect<T>> for ResolverFactory {
-    type Response = Connect<T>;
-    type Error = ConnectError;
-    type Config = ();
-    type Service = Resolver;
-    type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
-
-    fn new_service(&self, _: ()) -> Self::Future {
-        let service = self.resolver.clone();
-        Box::pin(async { Ok(service) })
-    }
-}
-
-/// DNS Resolver Service
-#[derive(Clone)]
-pub enum Resolver {
-    Default,
-    Custom(Rc<dyn Resolve>),
-}
-
-/// An interface for custom async DNS resolvers.
+/// Custom async DNS resolvers.
 ///
-/// # Usage
+/// # Examples
 /// ```
 /// use std::net::SocketAddr;
 ///
@@ -89,155 +40,23 @@ pub enum Resolver {
 ///     }
 /// }
 ///
-/// let resolver = MyResolver {
+/// let my_resolver = MyResolver {
 ///     trust_dns: TokioAsyncResolver::tokio_from_system_conf().unwrap(),
 /// };
 ///
-/// // construct custom resolver
-/// let resolver = Resolver::new_custom(resolver);
-///
-/// // pass custom resolver to connector builder.
-/// // connector would then be usable as a service or awc's connector.
-/// let connector = actix_tls::connect::new_connector::<&str>(resolver.clone());
+/// // wrap custom resolver
+/// let resolver = Resolver::custom(my_resolver);
 ///
 /// // resolver can be passed to connector factory where returned service factory
-/// // can be used to construct new connector services.
-/// let factory = actix_tls::connect::new_connector_factory::<&str>(resolver);
+/// // can be used to construct new connector services for use in clients
+/// let factory = actix_tls::connect::Connector::new(resolver);
+/// let connector = factory.service();
 /// ```
 pub trait Resolve {
+    /// Given DNS lookup information, returns a future that completes with socket information.
     fn lookup<'a>(
         &'a self,
         host: &'a str,
         port: u16,
-    ) -> LocalBoxFuture<'a, Result<Vec<SocketAddr>, Box<dyn std::error::Error>>>;
-}
-
-impl Resolver {
-    /// Constructor for custom Resolve trait object and use it as resolver.
-    pub fn new_custom(resolver: impl Resolve + 'static) -> Self {
-        Self::Custom(Rc::new(resolver))
-    }
-
-    // look up with default resolver variant.
-    fn look_up<T: Address>(req: &Connect<T>) -> JoinHandle<io::Result<IntoIter<SocketAddr>>> {
-        let host = req.hostname();
-        // TODO: Connect should always return host with port if possible.
-        let host = if req
-            .hostname()
-            .splitn(2, ':')
-            .last()
-            .and_then(|p| p.parse::<u16>().ok())
-            .map(|p| p == req.port())
-            .unwrap_or(false)
-        {
-            host.to_string()
-        } else {
-            format!("{}:{}", host, req.port())
-        };
-
-        // run blocking DNS lookup in thread pool
-        spawn_blocking(move || std::net::ToSocketAddrs::to_socket_addrs(&host))
-    }
-}
-
-impl<T: Address> Service<Connect<T>> for Resolver {
-    type Response = Connect<T>;
-    type Error = ConnectError;
-    type Future = ResolverFuture<T>;
-
-    actix_service::always_ready!();
-
-    fn call(&self, req: Connect<T>) -> Self::Future {
-        if req.addr.is_some() {
-            ResolverFuture::Connected(Some(req))
-        } else if let Ok(ip) = req.hostname().parse() {
-            let addr = SocketAddr::new(ip, req.port());
-            let req = req.set_addr(Some(addr));
-            ResolverFuture::Connected(Some(req))
-        } else {
-            trace!("DNS resolver: resolving host {:?}", req.hostname());
-
-            match self {
-                Self::Default => {
-                    let fut = Self::look_up(&req);
-                    ResolverFuture::LookUp(fut, Some(req))
-                }
-
-                Self::Custom(resolver) => {
-                    let resolver = Rc::clone(resolver);
-                    ResolverFuture::LookupCustom(Box::pin(async move {
-                        let addrs = resolver
-                            .lookup(req.hostname(), req.port())
-                            .await
-                            .map_err(ConnectError::Resolver)?;
-
-                        let req = req.set_addrs(addrs);
-
-                        if req.addr.is_none() {
-                            Err(ConnectError::NoRecords)
-                        } else {
-                            Ok(req)
-                        }
-                    }))
-                }
-            }
-        }
-    }
-}
-
-pub enum ResolverFuture<T: Address> {
-    Connected(Option<Connect<T>>),
-    LookUp(
-        JoinHandle<io::Result<IntoIter<SocketAddr>>>,
-        Option<Connect<T>>,
-    ),
-    LookupCustom(LocalBoxFuture<'static, Result<Connect<T>, ConnectError>>),
-}
-
-impl<T: Address> Future for ResolverFuture<T> {
-    type Output = Result<Connect<T>, ConnectError>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        match self.get_mut() {
-            Self::Connected(conn) => Poll::Ready(Ok(conn
-                .take()
-                .expect("ResolverFuture polled after finished"))),
-
-            Self::LookUp(fut, req) => {
-                let res = match ready!(Pin::new(fut).poll(cx)) {
-                    Ok(Ok(res)) => Ok(res),
-                    Ok(Err(e)) => Err(ConnectError::Resolver(Box::new(e))),
-                    Err(e) => Err(ConnectError::Io(e.into())),
-                };
-
-                let req = req.take().unwrap();
-
-                let addrs = res.map_err(|err| {
-                    trace!(
-                        "DNS resolver: failed to resolve host {:?} err: {:?}",
-                        req.hostname(),
-                        err
-                    );
-
-                    err
-                })?;
-
-                let req = req.set_addrs(addrs);
-
-                trace!(
-                    "DNS resolver: host {:?} resolved to {:?}",
-                    req.hostname(),
-                    req.addrs()
-                );
-
-                if req.addr.is_none() {
-                    Poll::Ready(Err(ConnectError::NoRecords))
-                } else {
-                    Poll::Ready(Ok(req))
-                }
-            }
-
-            Self::LookupCustom(fut) => fut.as_mut().poll(cx),
-        }
-    }
+    ) -> LocalBoxFuture<'a, Result<Vec<SocketAddr>, Box<dyn StdError>>>;
 }

actix-tls/src/connect/resolver.rs

@@ -0,0 +1,201 @@
+use std::{
+    future::Future,
+    io,
+    net::SocketAddr,
+    pin::Pin,
+    rc::Rc,
+    task::{Context, Poll},
+    vec::IntoIter,
+};
+
+use actix_rt::task::{spawn_blocking, JoinHandle};
+use actix_service::{Service, ServiceFactory};
+use actix_utils::future::{ok, Ready};
+use futures_core::{future::LocalBoxFuture, ready};
+use log::trace;
+
+use super::{ConnectError, ConnectInfo, Host, Resolve};
+
+/// DNS resolver service factory.
+#[derive(Clone, Default)]
+pub struct Resolver {
+    resolver: ResolverService,
+}
+
+impl Resolver {
+    /// Constructs a new resolver factory with a custom resolver.
+    pub fn custom(resolver: impl Resolve + 'static) -> Self {
+        Self {
+            resolver: ResolverService::custom(resolver),
+        }
+    }
+
+    /// Returns a new resolver service.
+    pub fn service(&self) -> ResolverService {
+        self.resolver.clone()
+    }
+}
+
+impl<R: Host> ServiceFactory<ConnectInfo<R>> for Resolver {
+    type Response = ConnectInfo<R>;
+    type Error = ConnectError;
+    type Config = ();
+    type Service = ResolverService;
+    type InitError = ();
+    type Future = Ready<Result<Self::Service, Self::InitError>>;
+
+    fn new_service(&self, _: ()) -> Self::Future {
+        ok(self.resolver.clone())
+    }
+}
+
+#[derive(Clone)]
+enum ResolverKind {
+    /// Built-in DNS resolver.
+    ///
+    /// See [`std::net::ToSocketAddrs`] trait.
+    Default,
+
+    /// Custom, user-provided DNS resolver.
+    Custom(Rc<dyn Resolve>),
+}
+
+impl Default for ResolverKind {
+    fn default() -> Self {
+        Self::Default
+    }
+}
+
+/// DNS resolver service.
+#[derive(Clone, Default)]
+pub struct ResolverService {
+    kind: ResolverKind,
+}
+
+impl ResolverService {
+    /// Constructor for custom Resolve trait object and use it as resolver.
+    pub fn custom(resolver: impl Resolve + 'static) -> Self {
+        Self {
+            kind: ResolverKind::Custom(Rc::new(resolver)),
+        }
+    }
+
+    /// Resolve DNS with default resolver.
+    fn default_lookup<R: Host>(
+        req: &ConnectInfo<R>,
+    ) -> JoinHandle<io::Result<IntoIter<SocketAddr>>> {
+        // reconstruct host; concatenate hostname and port together
+        let host = format!("{}:{}", req.hostname(), req.port());
+
+        // run blocking DNS lookup in thread pool since DNS lookups can take upwards of seconds on
+        // some platforms if conditions are poor and OS-level cache is not populated
+        spawn_blocking(move || std::net::ToSocketAddrs::to_socket_addrs(&host))
+    }
+}
+
+impl<R: Host> Service<ConnectInfo<R>> for ResolverService {
+    type Response = ConnectInfo<R>;
+    type Error = ConnectError;
+    type Future = ResolverFut<R>;
+
+    actix_service::always_ready!();
+
+    fn call(&self, req: ConnectInfo<R>) -> Self::Future {
+        if req.addr.is_resolved() {
+            // socket address(es) already resolved; return existing connection request
+            ResolverFut::Resolved(Some(req))
+        } else if let Ok(ip) = req.hostname().parse() {
+            // request hostname is valid ip address; add address to request and return
+            let addr = SocketAddr::new(ip, req.port());
+            let req = req.set_addr(Some(addr));
+            ResolverFut::Resolved(Some(req))
+        } else {
+            trace!("DNS resolver: resolving host {:?}", req.hostname());
+
+            match &self.kind {
+                ResolverKind::Default => {
+                    let fut = Self::default_lookup(&req);
+                    ResolverFut::LookUp(fut, Some(req))
+                }
+
+                ResolverKind::Custom(resolver) => {
+                    let resolver = Rc::clone(resolver);
+
+                    ResolverFut::LookupCustom(Box::pin(async move {
+                        let addrs = resolver
+                            .lookup(req.hostname(), req.port())
+                            .await
+                            .map_err(ConnectError::Resolver)?;
+
+                        let req = req.set_addrs(addrs);
+
+                        if req.addr.is_unresolved() {
+                            Err(ConnectError::NoRecords)
+                        } else {
+                            Ok(req)
+                        }
+                    }))
+                }
+            }
+        }
+    }
+}
+
+/// Future for resolver service.
+#[doc(hidden)]
+pub enum ResolverFut<R: Host> {
+    Resolved(Option<ConnectInfo<R>>),
+    LookUp(
+        JoinHandle<io::Result<IntoIter<SocketAddr>>>,
+        Option<ConnectInfo<R>>,
+    ),
+    LookupCustom(LocalBoxFuture<'static, Result<ConnectInfo<R>, ConnectError>>),
+}
+
+impl<R: Host> Future for ResolverFut<R> {
+    type Output = Result<ConnectInfo<R>, ConnectError>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        match self.get_mut() {
+            Self::Resolved(conn) => Poll::Ready(Ok(conn
+                .take()
+                .expect("ResolverFuture polled after finished"))),
+
+            Self::LookUp(fut, req) => {
+                let res = match ready!(Pin::new(fut).poll(cx)) {
+                    Ok(Ok(res)) => Ok(res),
+                    Ok(Err(e)) => Err(ConnectError::Resolver(Box::new(e))),
+                    Err(e) => Err(ConnectError::Io(e.into())),
+                };
+
+                let req = req.take().unwrap();
+
+                let addrs = res.map_err(|err| {
+                    trace!(
+                        "DNS resolver: failed to resolve host {:?} err: {:?}",
+                        req.hostname(),
+                        err
+                    );
+
+                    err
+                })?;
+
+                let req = req.set_addrs(addrs);
+
+                trace!(
+                    "DNS resolver: host {:?} resolved to {:?}",
+                    req.hostname(),
+                    req.addrs()
+                );
+
+                if req.addr.is_unresolved() {
+                    Poll::Ready(Err(ConnectError::NoRecords))
+                } else {
+                    Poll::Ready(Ok(req))
+                }
+            }
+
+            Self::LookupCustom(fut) => fut.as_mut().poll(cx),
+        }
+    }
+}

actix-tls/src/connect/rustls.rs

@@ -0,0 +1,150 @@
+//! Rustls based connector service.
+//!
+//! See [`TlsConnector`] for main connector service factory docs.
+
+use std::{
+    convert::TryFrom,
+    future::Future,
+    io,
+    pin::Pin,
+    sync::Arc,
+    task::{Context, Poll},
+};
+
+use actix_rt::net::ActixStream;
+use actix_service::{Service, ServiceFactory};
+use actix_utils::future::{ok, Ready};
+use futures_core::ready;
+use log::trace;
+use tokio_rustls::rustls::{client::ServerName, OwnedTrustAnchor, RootCertStore};
+use tokio_rustls::{client::TlsStream as AsyncTlsStream, rustls::ClientConfig};
+use tokio_rustls::{Connect as RustlsConnect, TlsConnector as RustlsTlsConnector};
+use webpki_roots::TLS_SERVER_ROOTS;
+
+use crate::connect::{Connection, Host};
+
+pub mod reexports {
+    //! Re-exports from `rustls` and `webpki_roots` that are useful for connectors.
+
+    pub use tokio_rustls::rustls::ClientConfig;
+
+    pub use tokio_rustls::client::TlsStream as AsyncTlsStream;
+
+    pub use webpki_roots::TLS_SERVER_ROOTS;
+}
+
+/// Returns standard root certificates from `webpki-roots` crate as a rustls certificate store.
+pub fn webpki_roots_cert_store() -> RootCertStore {
+    let mut root_certs = RootCertStore::empty();
+    for cert in TLS_SERVER_ROOTS.0 {
+        let cert = OwnedTrustAnchor::from_subject_spki_name_constraints(
+            cert.subject,
+            cert.spki,
+            cert.name_constraints,
+        );
+        let certs = vec![cert].into_iter();
+        root_certs.add_server_trust_anchors(certs);
+    }
+    root_certs
+}
+
+/// Connector service factory using `rustls`.
+#[derive(Clone)]
+pub struct TlsConnector {
+    connector: Arc<ClientConfig>,
+}
+
+impl TlsConnector {
+    /// Constructs new connector service factory from a `rustls` client configuration.
+    pub fn new(connector: Arc<ClientConfig>) -> Self {
+        TlsConnector { connector }
+    }
+
+    /// Constructs new connector service from a `rustls` client configuration.
+    pub fn service(connector: Arc<ClientConfig>) -> TlsConnectorService {
+        TlsConnectorService { connector }
+    }
+}
+
+impl<R, IO> ServiceFactory<Connection<R, IO>> for TlsConnector
+where
+    R: Host,
+    IO: ActixStream + 'static,
+{
+    type Response = Connection<R, AsyncTlsStream<IO>>;
+    type Error = io::Error;
+    type Config = ();
+    type Service = TlsConnectorService;
+    type InitError = ();
+    type Future = Ready<Result<Self::Service, Self::InitError>>;
+
+    fn new_service(&self, _: ()) -> Self::Future {
+        ok(TlsConnectorService {
+            connector: self.connector.clone(),
+        })
+    }
+}
+
+/// Connector service using `rustls`.
+#[derive(Clone)]
+pub struct TlsConnectorService {
+    connector: Arc<ClientConfig>,
+}
+
+impl<R, IO> Service<Connection<R, IO>> for TlsConnectorService
+where
+    R: Host,
+    IO: ActixStream,
+{
+    type Response = Connection<R, AsyncTlsStream<IO>>;
+    type Error = io::Error;
+    type Future = ConnectFut<R, IO>;
+
+    actix_service::always_ready!();
+
+    fn call(&self, connection: Connection<R, IO>) -> Self::Future {
+        trace!("SSL Handshake start for: {:?}", connection.hostname());
+        let (stream, connection) = connection.replace_io(());
+
+        match ServerName::try_from(connection.hostname()) {
+            Ok(host) => ConnectFut::Future {
+                connect: RustlsTlsConnector::from(self.connector.clone()).connect(host, stream),
+                connection: Some(connection),
+            },
+            Err(_) => ConnectFut::InvalidDns,
+        }
+    }
+}
+
+/// Connect future for Rustls service.
+#[doc(hidden)]
+pub enum ConnectFut<R, IO> {
+    /// See issue <https://github.com/briansmith/webpki/issues/54>
+    InvalidDns,
+    Future {
+        connect: RustlsConnect<IO>,
+        connection: Option<Connection<R, ()>>,
+    },
+}
+
+impl<R, IO> Future for ConnectFut<R, IO>
+where
+    R: Host,
+    IO: ActixStream,
+{
+    type Output = Result<Connection<R, AsyncTlsStream<IO>>, io::Error>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        match self.get_mut() {
+            Self::InvalidDns => Poll::Ready(Err(
+                io::Error::new(io::ErrorKind::Other, "rustls currently only handles hostname-based connections. See https://github.com/briansmith/webpki/issues/54")
+            )),
+            Self::Future { connect, connection } => {
+                let stream = ready!(Pin::new(connect).poll(cx))?;
+                let connection = connection.take().unwrap();
+                trace!("SSL Handshake success: {:?}", connection.hostname());
+                Poll::Ready(Ok(connection.replace_io(stream).1))
+            }
+        }
+    }
+}

actix-tls/src/connect/service.rs

@@ -1,129 +0,0 @@
-use std::{
-    future::Future,
-    pin::Pin,
-    task::{Context, Poll},
-};
-
-use actix_rt::net::TcpStream;
-use actix_service::{Service, ServiceFactory};
-use futures_core::{future::LocalBoxFuture, ready};
-
-use super::connect::{Address, Connect, Connection};
-use super::connector::{TcpConnector, TcpConnectorFactory};
-use super::error::ConnectError;
-use super::resolve::{Resolver, ResolverFactory};
-
-pub struct ConnectServiceFactory {
-    tcp: TcpConnectorFactory,
-    resolver: ResolverFactory,
-}
-
-impl ConnectServiceFactory {
-    /// Construct new ConnectService factory
-    pub fn new(resolver: Resolver) -> Self {
-        ConnectServiceFactory {
-            tcp: TcpConnectorFactory,
-            resolver: ResolverFactory::new(resolver),
-        }
-    }
-
-    /// Construct new service
-    pub fn service(&self) -> ConnectService {
-        ConnectService {
-            tcp: self.tcp.service(),
-            resolver: self.resolver.service(),
-        }
-    }
-}
-
-impl Clone for ConnectServiceFactory {
-    fn clone(&self) -> Self {
-        ConnectServiceFactory {
-            tcp: self.tcp,
-            resolver: self.resolver.clone(),
-        }
-    }
-}
-
-impl<T: Address> ServiceFactory<Connect<T>> for ConnectServiceFactory {
-    type Response = Connection<T, TcpStream>;
-    type Error = ConnectError;
-    type Config = ();
-    type Service = ConnectService;
-    type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
-
-    fn new_service(&self, _: ()) -> Self::Future {
-        let service = self.service();
-        Box::pin(async { Ok(service) })
-    }
-}
-
-#[derive(Clone)]
-pub struct ConnectService {
-    tcp: TcpConnector,
-    resolver: Resolver,
-}
-
-impl<T: Address> Service<Connect<T>> for ConnectService {
-    type Response = Connection<T, TcpStream>;
-    type Error = ConnectError;
-    type Future = ConnectServiceResponse<T>;
-
-    actix_service::always_ready!();
-
-    fn call(&self, req: Connect<T>) -> Self::Future {
-        ConnectServiceResponse {
-            fut: ConnectFuture::Resolve(self.resolver.call(req)),
-            tcp: self.tcp,
-        }
-    }
-}
-
-// helper enum to generic over futures of resolve and connect phase.
-pub(crate) enum ConnectFuture<T: Address> {
-    Resolve(<Resolver as Service<Connect<T>>>::Future),
-    Connect(<TcpConnector as Service<Connect<T>>>::Future),
-}
-
-// helper enum to contain the future output of ConnectFuture
-pub(crate) enum ConnectOutput<T: Address> {
-    Resolved(Connect<T>),
-    Connected(Connection<T, TcpStream>),
-}
-
-impl<T: Address> ConnectFuture<T> {
-    fn poll_connect(
-        &mut self,
-        cx: &mut Context<'_>,
-    ) -> Poll<Result<ConnectOutput<T>, ConnectError>> {
-        match self {
-            ConnectFuture::Resolve(ref mut fut) => {
-                Pin::new(fut).poll(cx).map_ok(ConnectOutput::Resolved)
-            }
-            ConnectFuture::Connect(ref mut fut) => {
-                Pin::new(fut).poll(cx).map_ok(ConnectOutput::Connected)
-            }
-        }
-    }
-}
-
-pub struct ConnectServiceResponse<T: Address> {
-    fut: ConnectFuture<T>,
-    tcp: TcpConnector,
-}
-
-impl<T: Address> Future for ConnectServiceResponse<T> {
-    type Output = Result<Connection<T, TcpStream>, ConnectError>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        loop {
-            match ready!(self.fut.poll_connect(cx))? {
-                ConnectOutput::Resolved(res) => {
-                    self.fut = ConnectFuture::Connect(self.tcp.call(res));
-                }
-                ConnectOutput::Connected(res) => return Poll::Ready(Ok(res)),
-            }
-        }
-    }
-}

actix-tls/src/connect/ssl/mod.rs

@@ -1,10 +0,0 @@
-//! SSL Services
-
-#[cfg(feature = "openssl")]
-pub mod openssl;
-
-#[cfg(feature = "rustls")]
-pub mod rustls;
-
-#[cfg(feature = "native-tls")]
-pub mod native_tls;

actix-tls/src/connect/ssl/native_tls.rs

@@ -1,88 +0,0 @@
-use std::io;
-
-use actix_rt::net::ActixStream;
-use actix_service::{Service, ServiceFactory};
-use futures_core::future::LocalBoxFuture;
-use log::trace;
-use tokio_native_tls::{TlsConnector as TokioNativetlsConnector, TlsStream};
-
-pub use tokio_native_tls::native_tls::TlsConnector;
-
-use crate::connect::{Address, Connection};
-
-/// Native-tls connector factory and service
-pub struct NativetlsConnector {
-    connector: TokioNativetlsConnector,
-}
-
-impl NativetlsConnector {
-    pub fn new(connector: TlsConnector) -> Self {
-        Self {
-            connector: TokioNativetlsConnector::from(connector),
-        }
-    }
-}
-
-impl NativetlsConnector {
-    pub fn service(connector: TlsConnector) -> Self {
-        Self::new(connector)
-    }
-}
-
-impl Clone for NativetlsConnector {
-    fn clone(&self) -> Self {
-        Self {
-            connector: self.connector.clone(),
-        }
-    }
-}
-
-impl<T: Address, U> ServiceFactory<Connection<T, U>> for NativetlsConnector
-where
-    U: ActixStream + 'static,
-{
-    type Response = Connection<T, TlsStream<U>>;
-    type Error = io::Error;
-    type Config = ();
-    type Service = Self;
-    type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
-
-    fn new_service(&self, _: ()) -> Self::Future {
-        let connector = self.clone();
-        Box::pin(async { Ok(connector) })
-    }
-}
-
-// NativetlsConnector is both it's ServiceFactory and Service impl type.
-// As the factory and service share the same type and state.
-impl<T, U> Service<Connection<T, U>> for NativetlsConnector
-where
-    T: Address,
-    U: ActixStream + 'static,
-{
-    type Response = Connection<T, TlsStream<U>>;
-    type Error = io::Error;
-    type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
-
-    actix_service::always_ready!();
-
-    fn call(&self, stream: Connection<T, U>) -> Self::Future {
-        let (io, stream) = stream.replace_io(());
-        let connector = self.connector.clone();
-        Box::pin(async move {
-            trace!("SSL Handshake start for: {:?}", stream.host());
-            connector
-                .connect(stream.host(), io)
-                .await
-                .map(|res| {
-                    trace!("SSL Handshake success: {:?}", stream.host());
-                    stream.replace_io(res).1
-                })
-                .map_err(|e| {
-                    trace!("SSL Handshake error: {:?}", e);
-                    io::Error::new(io::ErrorKind::Other, format!("{}", e))
-                })
-        })
-    }
-}

actix-tls/src/connect/ssl/openssl.rs

@@ -1,130 +0,0 @@
-use std::{
-    future::Future,
-    io,
-    pin::Pin,
-    task::{Context, Poll},
-};
-
-use actix_rt::net::ActixStream;
-use actix_service::{Service, ServiceFactory};
-use futures_core::{future::LocalBoxFuture, ready};
-use log::trace;
-
-pub use openssl::ssl::{Error as SslError, HandshakeError, SslConnector, SslMethod};
-pub use tokio_openssl::SslStream;
-
-use crate::connect::{Address, Connection};
-
-/// OpenSSL connector factory
-pub struct OpensslConnector {
-    connector: SslConnector,
-}
-
-impl OpensslConnector {
-    pub fn new(connector: SslConnector) -> Self {
-        OpensslConnector { connector }
-    }
-
-    pub fn service(connector: SslConnector) -> OpensslConnectorService {
-        OpensslConnectorService { connector }
-    }
-}
-
-impl Clone for OpensslConnector {
-    fn clone(&self) -> Self {
-        Self {
-            connector: self.connector.clone(),
-        }
-    }
-}
-
-impl<T, U> ServiceFactory<Connection<T, U>> for OpensslConnector
-where
-    T: Address,
-    U: ActixStream + 'static,
-{
-    type Response = Connection<T, SslStream<U>>;
-    type Error = io::Error;
-    type Config = ();
-    type Service = OpensslConnectorService;
-    type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
-
-    fn new_service(&self, _: ()) -> Self::Future {
-        let connector = self.connector.clone();
-        Box::pin(async { Ok(OpensslConnectorService { connector }) })
-    }
-}
-
-pub struct OpensslConnectorService {
-    connector: SslConnector,
-}
-
-impl Clone for OpensslConnectorService {
-    fn clone(&self) -> Self {
-        Self {
-            connector: self.connector.clone(),
-        }
-    }
-}
-
-impl<T, U> Service<Connection<T, U>> for OpensslConnectorService
-where
-    T: Address,
-    U: ActixStream,
-{
-    type Response = Connection<T, SslStream<U>>;
-    type Error = io::Error;
-    type Future = ConnectAsyncExt<T, U>;
-
-    actix_service::always_ready!();
-
-    fn call(&self, stream: Connection<T, U>) -> Self::Future {
-        trace!("SSL Handshake start for: {:?}", stream.host());
-        let (io, stream) = stream.replace_io(());
-        let host = stream.host();
-
-        let config = self
-            .connector
-            .configure()
-            .expect("SSL connect configuration was invalid.");
-
-        let ssl = config
-            .into_ssl(host)
-            .expect("SSL connect configuration was invalid.");
-
-        ConnectAsyncExt {
-            io: Some(SslStream::new(ssl, io).unwrap()),
-            stream: Some(stream),
-        }
-    }
-}
-
-pub struct ConnectAsyncExt<T, U> {
-    io: Option<SslStream<U>>,
-    stream: Option<Connection<T, ()>>,
-}
-
-impl<T: Address, U> Future for ConnectAsyncExt<T, U>
-where
-    T: Address,
-    U: ActixStream,
-{
-    type Output = Result<Connection<T, SslStream<U>>, io::Error>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let this = self.get_mut();
-
-        match ready!(Pin::new(this.io.as_mut().unwrap()).poll_connect(cx)) {
-            Ok(_) => {
-                let stream = this.stream.take().unwrap();
-                trace!("SSL Handshake success: {:?}", stream.host());
-                Poll::Ready(Ok(stream.replace_io(this.io.take().unwrap()).1))
-            }
-            Err(e) => {
-                trace!("SSL Handshake error: {:?}", e);
-                Poll::Ready(Err(io::Error::new(io::ErrorKind::Other, format!("{}", e))))
-            }
-        }
-    }
-}

actix-tls/src/connect/ssl/rustls.rs

@@ -1,131 +0,0 @@
-use std::{
-    convert::TryFrom,
-    future::Future,
-    io,
-    pin::Pin,
-    sync::Arc,
-    task::{Context, Poll},
-};
-
-pub use tokio_rustls::{client::TlsStream, rustls::ClientConfig};
-pub use webpki_roots::TLS_SERVER_ROOTS;
-
-use actix_rt::net::ActixStream;
-use actix_service::{Service, ServiceFactory};
-use futures_core::{future::LocalBoxFuture, ready};
-use log::trace;
-use tokio_rustls::rustls::client::ServerName;
-use tokio_rustls::{Connect, TlsConnector};
-
-use crate::connect::{Address, Connection};
-
-/// Rustls connector factory
-pub struct RustlsConnector {
-    connector: Arc<ClientConfig>,
-}
-
-impl RustlsConnector {
-    pub fn new(connector: Arc<ClientConfig>) -> Self {
-        RustlsConnector { connector }
-    }
-}
-
-impl RustlsConnector {
-    pub fn service(connector: Arc<ClientConfig>) -> RustlsConnectorService {
-        RustlsConnectorService { connector }
-    }
-}
-
-impl Clone for RustlsConnector {
-    fn clone(&self) -> Self {
-        Self {
-            connector: self.connector.clone(),
-        }
-    }
-}
-
-impl<T, U> ServiceFactory<Connection<T, U>> for RustlsConnector
-where
-    T: Address,
-    U: ActixStream + 'static,
-{
-    type Response = Connection<T, TlsStream<U>>;
-    type Error = io::Error;
-    type Config = ();
-    type Service = RustlsConnectorService;
-    type InitError = ();
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
-
-    fn new_service(&self, _: ()) -> Self::Future {
-        let connector = self.connector.clone();
-        Box::pin(async { Ok(RustlsConnectorService { connector }) })
-    }
-}
-
-pub struct RustlsConnectorService {
-    connector: Arc<ClientConfig>,
-}
-
-impl Clone for RustlsConnectorService {
-    fn clone(&self) -> Self {
-        Self {
-            connector: self.connector.clone(),
-        }
-    }
-}
-
-impl<T, U> Service<Connection<T, U>> for RustlsConnectorService
-where
-    T: Address,
-    U: ActixStream,
-{
-    type Response = Connection<T, TlsStream<U>>;
-    type Error = io::Error;
-    type Future = RustlsConnectorServiceFuture<T, U>;
-
-    actix_service::always_ready!();
-
-    fn call(&self, connection: Connection<T, U>) -> Self::Future {
-        trace!("SSL Handshake start for: {:?}", connection.host());
-        let (stream, connection) = connection.replace_io(());
-
-        match ServerName::try_from(connection.host()) {
-            Ok(host) => RustlsConnectorServiceFuture::Future {
-                connect: TlsConnector::from(self.connector.clone()).connect(host, stream),
-                connection: Some(connection),
-            },
-            Err(_) => RustlsConnectorServiceFuture::InvalidDns,
-        }
-    }
-}
-
-pub enum RustlsConnectorServiceFuture<T, U> {
-    /// See issue https://github.com/briansmith/webpki/issues/54
-    InvalidDns,
-    Future {
-        connect: Connect<U>,
-        connection: Option<Connection<T, ()>>,
-    },
-}
-
-impl<T, U> Future for RustlsConnectorServiceFuture<T, U>
-where
-    T: Address,
-    U: ActixStream,
-{
-    type Output = Result<Connection<T, TlsStream<U>>, io::Error>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        match self.get_mut() {
-            Self::InvalidDns => Poll::Ready(Err(
-                io::Error::new(io::ErrorKind::Other, "rustls currently only handles hostname-based connections. See https://github.com/briansmith/webpki/issues/54")
-            )),
-            Self::Future { connect, connection } => {
-                let stream = ready!(Pin::new(connect).poll(cx))?;
-                let connection = connection.take().unwrap();
-                trace!("SSL Handshake success: {:?}", connection.host());
-                Poll::Ready(Ok(connection.replace_io(stream).1))
-            }
-        }
-    }
-}

actix-tls/src/connect/tcp.rs

@@ -0,0 +1,204 @@
+//! TCP connector service.
+//!
+//! See [`TcpConnector`] for main connector service factory docs.
+
+use std::{
+    collections::VecDeque,
+    future::Future,
+    io,
+    net::{IpAddr, SocketAddr, SocketAddrV4, SocketAddrV6},
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use actix_rt::net::{TcpSocket, TcpStream};
+use actix_service::{Service, ServiceFactory};
+use actix_utils::future::{ok, Ready};
+use futures_core::ready;
+use log::{error, trace};
+use tokio_util::sync::ReusableBoxFuture;
+
+use super::{connect_addrs::ConnectAddrs, error::ConnectError, ConnectInfo, Connection, Host};
+
+/// TCP connector service factory.
+#[derive(Debug, Clone, Copy, Default)]
+#[non_exhaustive]
+pub struct TcpConnector;
+
+impl TcpConnector {
+    /// Returns a new TCP connector service.
+    pub fn service(&self) -> TcpConnectorService {
+        TcpConnectorService::default()
+    }
+}
+
+impl<R: Host> ServiceFactory<ConnectInfo<R>> for TcpConnector {
+    type Response = Connection<R, TcpStream>;
+    type Error = ConnectError;
+    type Config = ();
+    type Service = TcpConnectorService;
+    type InitError = ();
+    type Future = Ready<Result<Self::Service, Self::InitError>>;
+
+    fn new_service(&self, _: ()) -> Self::Future {
+        ok(self.service())
+    }
+}
+
+/// TCP connector service.
+#[derive(Debug, Copy, Clone, Default)]
+#[non_exhaustive]
+pub struct TcpConnectorService;
+
+impl<R: Host> Service<ConnectInfo<R>> for TcpConnectorService {
+    type Response = Connection<R, TcpStream>;
+    type Error = ConnectError;
+    type Future = TcpConnectorFut<R>;
+
+    actix_service::always_ready!();
+
+    fn call(&self, req: ConnectInfo<R>) -> Self::Future {
+        let port = req.port();
+
+        let ConnectInfo {
+            request: req,
+            addr,
+            local_addr,
+            ..
+        } = req;
+
+        TcpConnectorFut::new(req, port, local_addr, addr)
+    }
+}
+
+/// Connect future for TCP service.
+#[doc(hidden)]
+pub enum TcpConnectorFut<R> {
+    Response {
+        req: Option<R>,
+        port: u16,
+        local_addr: Option<IpAddr>,
+        addrs: Option<VecDeque<SocketAddr>>,
+        stream: ReusableBoxFuture<Result<TcpStream, io::Error>>,
+    },
+
+    Error(Option<ConnectError>),
+}
+
+impl<R: Host> TcpConnectorFut<R> {
+    pub(crate) fn new(
+        req: R,
+        port: u16,
+        local_addr: Option<IpAddr>,
+        addr: ConnectAddrs,
+    ) -> TcpConnectorFut<R> {
+        if addr.is_unresolved() {
+            error!("TCP connector: unresolved connection address");
+            return TcpConnectorFut::Error(Some(ConnectError::Unresolved));
+        }
+
+        trace!(
+            "TCP connector: connecting to {} on port {}",
+            req.hostname(),
+            port
+        );
+
+        match addr {
+            ConnectAddrs::None => unreachable!("none variant already checked"),
+
+            ConnectAddrs::One(addr) => TcpConnectorFut::Response {
+                req: Some(req),
+                port,
+                local_addr,
+                addrs: None,
+                stream: ReusableBoxFuture::new(connect(addr, local_addr)),
+            },
+
+            // when resolver returns multiple socket addr for request they would be popped from
+            // front end of queue and returns with the first successful tcp connection.
+            ConnectAddrs::Multi(mut addrs) => {
+                let addr = addrs.pop_front().unwrap();
+
+                TcpConnectorFut::Response {
+                    req: Some(req),
+                    port,
+                    local_addr,
+                    addrs: Some(addrs),
+                    stream: ReusableBoxFuture::new(connect(addr, local_addr)),
+                }
+            }
+        }
+    }
+}
+
+impl<R: Host> Future for TcpConnectorFut<R> {
+    type Output = Result<Connection<R, TcpStream>, ConnectError>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        match self.get_mut() {
+            TcpConnectorFut::Error(err) => Poll::Ready(Err(err.take().unwrap())),
+
+            TcpConnectorFut::Response {
+                req,
+                port,
+                local_addr,
+                addrs,
+                stream,
+            } => loop {
+                match ready!(stream.poll(cx)) {
+                    Ok(sock) => {
+                        let req = req.take().unwrap();
+
+                        trace!(
+                            "TCP connector: successfully connected to {:?} - {:?}",
+                            req.hostname(),
+                            sock.peer_addr()
+                        );
+
+                        return Poll::Ready(Ok(Connection::new(req, sock)));
+                    }
+
+                    Err(err) => {
+                        trace!(
+                            "TCP connector: failed to connect to {:?} port: {}",
+                            req.as_ref().unwrap().hostname(),
+                            port,
+                        );
+
+                        if let Some(addr) = addrs.as_mut().and_then(|addrs| addrs.pop_front()) {
+                            stream.set(connect(addr, *local_addr));
+                        } else {
+                            return Poll::Ready(Err(ConnectError::Io(err)));
+                        }
+                    }
+                }
+            },
+        }
+    }
+}
+
+async fn connect(addr: SocketAddr, local_addr: Option<IpAddr>) -> io::Result<TcpStream> {
+    // use local addr if connect asks for it
+    match local_addr {
+        Some(ip_addr) => {
+            let socket = match ip_addr {
+                IpAddr::V4(ip_addr) => {
+                    let socket = TcpSocket::new_v4()?;
+                    let addr = SocketAddr::V4(SocketAddrV4::new(ip_addr, 0));
+                    socket.bind(addr)?;
+                    socket
+                }
+                IpAddr::V6(ip_addr) => {
+                    let socket = TcpSocket::new_v6()?;
+                    let addr = SocketAddr::V6(SocketAddrV6::new(ip_addr, 0, 0, 0));
+                    socket.bind(addr)?;
+                    socket
+                }
+            };
+
+            socket.connect(addr).await
+        }
+
+        None => TcpStream::connect(addr).await,
+    }
+}

actix-tls/src/connect/uri.rs

@@ -1,8 +1,8 @@
 use http::Uri;
 
-use super::Address;
+use super::Host;
 
-impl Address for Uri {
+impl Host for Uri {
     fn hostname(&self) -> &str {
         self.host().unwrap_or("")
     }
@@ -35,9 +35,18 @@ fn scheme_to_port(scheme: Option<&str>) -> Option<u16> {
         Some("mqtts") => Some(8883),
 
         // File Transfer Protocol (FTP)
-        Some("ftp") => Some(1883),
+        Some("ftp") => Some(21),
         Some("ftps") => Some(990),
 
+        // Redis
+        Some("redis") => Some(6379),
+
+        // MySQL
+        Some("mysql") => Some(3306),
+
+        // PostgreSQL
+        Some("postgres") => Some(5432),
+
         _ => None,
     }
 }

actix-tls/src/lib.rs

@@ -1,14 +1,19 @@
-//! TLS acceptor and connector services for Actix ecosystem
+//! TLS acceptor and connector services for the Actix ecosystem.
 
 #![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(missing_docs)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 
 #[cfg(feature = "openssl")]
 #[allow(unused_extern_crates)]
 extern crate tls_openssl as openssl;
 
 #[cfg(feature = "accept")]
+#[cfg_attr(docsrs, doc(cfg(feature = "accept")))]
 pub mod accept;
+
 #[cfg(feature = "connect")]
+#[cfg_attr(docsrs, doc(cfg(feature = "connect")))]
 pub mod connect;

actix-tls/tests/accept-openssl.rs

@@ -0,0 +1,130 @@
+//! Use Rustls connector to test OpenSSL acceptor.
+
+#![cfg(all(
+    feature = "accept",
+    feature = "connect",
+    feature = "rustls",
+    feature = "openssl"
+))]
+
+use std::{convert::TryFrom, io::Write, sync::Arc};
+
+use actix_rt::net::TcpStream;
+use actix_server::TestServer;
+use actix_service::ServiceFactoryExt as _;
+use actix_tls::accept::openssl::{Acceptor, TlsStream};
+use actix_utils::future::ok;
+use tokio_rustls::rustls::{Certificate, ClientConfig, RootCertStore, ServerName};
+
+fn new_cert_and_key() -> (String, String) {
+    let cert = rcgen::generate_simple_self_signed(vec![
+        "127.0.0.1".to_owned(),
+        "localhost".to_owned(),
+    ])
+    .unwrap();
+
+    let key = cert.serialize_private_key_pem();
+    let cert = cert.serialize_pem().unwrap();
+
+    (cert, key)
+}
+
+fn openssl_acceptor(cert: String, key: String) -> tls_openssl::ssl::SslAcceptor {
+    use tls_openssl::{
+        pkey::PKey,
+        ssl::{SslAcceptor, SslMethod},
+        x509::X509,
+    };
+
+    let cert = X509::from_pem(cert.as_bytes()).unwrap();
+    let key = PKey::private_key_from_pem(key.as_bytes()).unwrap();
+
+    let mut builder = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
+    builder.set_certificate(&cert).unwrap();
+    builder.set_private_key(&key).unwrap();
+    builder.set_alpn_select_callback(|_, _protocols| Ok(b"http/1.1"));
+    builder.set_alpn_protos(b"\x08http/1.1").unwrap();
+    builder.build()
+}
+
+#[allow(dead_code)]
+mod danger {
+    use std::time::SystemTime;
+
+    use super::*;
+
+    use tokio_rustls::rustls::{
+        self,
+        client::{ServerCertVerified, ServerCertVerifier},
+    };
+
+    pub struct NoCertificateVerification;
+
+    impl ServerCertVerifier for NoCertificateVerification {
+        fn verify_server_cert(
+            &self,
+            _end_entity: &Certificate,
+            _intermediates: &[Certificate],
+            _server_name: &ServerName,
+            _scts: &mut dyn Iterator<Item = &[u8]>,
+            _ocsp_response: &[u8],
+            _now: SystemTime,
+        ) -> Result<ServerCertVerified, rustls::Error> {
+            Ok(ServerCertVerified::assertion())
+        }
+    }
+}
+
+#[allow(dead_code)]
+fn rustls_connector(_cert: String, _key: String) -> ClientConfig {
+    let mut config = ClientConfig::builder()
+        .with_safe_defaults()
+        .with_root_certificates(RootCertStore::empty())
+        .with_no_client_auth();
+
+    config
+        .dangerous()
+        .set_certificate_verifier(Arc::new(danger::NoCertificateVerification));
+
+    config.alpn_protocols = vec![b"http/1.1".to_vec()];
+    config
+}
+
+#[actix_rt::test]
+async fn accepts_connections() {
+    let (cert, key) = new_cert_and_key();
+
+    let srv = TestServer::with({
+        let cert = cert.clone();
+        let key = key.clone();
+
+        move || {
+            let openssl_acceptor = openssl_acceptor(cert.clone(), key.clone());
+            let tls_acceptor = Acceptor::new(openssl_acceptor);
+
+            tls_acceptor
+                .map_err(|err| println!("OpenSSL error: {:?}", err))
+                .and_then(move |_stream: TlsStream<TcpStream>| ok(()))
+        }
+    });
+
+    let mut sock = srv
+        .connect()
+        .expect("cannot connect to test server")
+        .into_std()
+        .unwrap();
+    sock.set_nonblocking(false).unwrap();
+
+    let config = rustls_connector(cert, key);
+    let config = Arc::new(config);
+
+    let mut conn = tokio_rustls::rustls::ClientConnection::new(
+        config,
+        ServerName::try_from("localhost").unwrap(),
+    )
+    .unwrap();
+
+    let mut stream = tokio_rustls::rustls::Stream::new(&mut conn, &mut sock);
+
+    stream.flush().expect("TLS handshake failed");
+}

actix-tls/tests/accept-rustls.rs

@@ -0,0 +1,106 @@
+//! Use OpenSSL connector to test Rustls acceptor.
+
+#![cfg(all(
+    feature = "accept",
+    feature = "connect",
+    feature = "rustls",
+    feature = "openssl"
+))]
+
+extern crate tls_openssl as openssl;
+
+use std::io::{BufReader, Write};
+
+use actix_rt::net::TcpStream;
+use actix_server::TestServer;
+use actix_service::ServiceFactoryExt as _;
+use actix_tls::accept::rustls::{Acceptor, TlsStream};
+use actix_tls::connect::openssl::reexports::SslConnector;
+use actix_utils::future::ok;
+use rustls_pemfile::{certs, pkcs8_private_keys};
+use tls_openssl::ssl::SslVerifyMode;
+use tokio_rustls::rustls::{self, Certificate, PrivateKey, ServerConfig};
+
+fn new_cert_and_key() -> (String, String) {
+    let cert = rcgen::generate_simple_self_signed(vec![
+        "127.0.0.1".to_owned(),
+        "localhost".to_owned(),
+    ])
+    .unwrap();
+
+    let key = cert.serialize_private_key_pem();
+    let cert = cert.serialize_pem().unwrap();
+
+    (cert, key)
+}
+
+fn rustls_server_config(cert: String, key: String) -> rustls::ServerConfig {
+    // Load TLS key and cert files
+
+    let cert = &mut BufReader::new(cert.as_bytes());
+    let key = &mut BufReader::new(key.as_bytes());
+
+    let cert_chain = certs(cert).unwrap().into_iter().map(Certificate).collect();
+    let mut keys = pkcs8_private_keys(key).unwrap();
+
+    let mut config = ServerConfig::builder()
+        .with_safe_defaults()
+        .with_no_client_auth()
+        .with_single_cert(cert_chain, PrivateKey(keys.remove(0)))
+        .unwrap();
+
+    config.alpn_protocols = vec![b"http/1.1".to_vec()];
+
+    config
+}
+
+fn openssl_connector(cert: String, key: String) -> SslConnector {
+    use actix_tls::connect::openssl::reexports::SslMethod;
+    use openssl::{pkey::PKey, x509::X509};
+
+    let cert = X509::from_pem(cert.as_bytes()).unwrap();
+    let key = PKey::private_key_from_pem(key.as_bytes()).unwrap();
+
+    let mut ssl = SslConnector::builder(SslMethod::tls()).unwrap();
+    ssl.set_verify(SslVerifyMode::NONE);
+    ssl.set_certificate(&cert).unwrap();
+    ssl.set_private_key(&key).unwrap();
+    ssl.set_alpn_protos(b"\x08http/1.1").unwrap();
+
+    ssl.build()
+}
+
+#[actix_rt::test]
+async fn accepts_connections() {
+    let (cert, key) = new_cert_and_key();
+
+    let srv = TestServer::with({
+        let cert = cert.clone();
+        let key = key.clone();
+
+        move || {
+            let tls_acceptor = Acceptor::new(rustls_server_config(cert.clone(), key.clone()));
+
+            tls_acceptor
+                .map_err(|err| println!("Rustls error: {:?}", err))
+                .and_then(move |_stream: TlsStream<TcpStream>| ok(()))
+        }
+    });
+
+    let sock = srv
+        .connect()
+        .expect("cannot connect to test server")
+        .into_std()
+        .unwrap();
+    sock.set_nonblocking(false).unwrap();
+
+    let connector = openssl_connector(cert, key);
+
+    let mut stream = connector
+        .connect("localhost", sock)
+        .expect("TLS handshake failed");
+
+    stream.do_handshake().expect("TLS handshake failed");
+
+    stream.flush().expect("TLS handshake failed");
+}

actix-tls/tests/test_connect.rs

@@ -12,7 +12,7 @@ use actix_service::{fn_service, Service, ServiceFactory};
 use bytes::Bytes;
 use futures_util::sink::SinkExt;
 
-use actix_tls::connect::{self as actix_connect, Connect};
+use actix_tls::connect::{ConnectError, ConnectInfo, Connection, Connector, Host};
 
 #[cfg(feature = "openssl")]
 #[actix_rt::test]
@@ -25,9 +25,9 @@ async fn test_string() {
         })
     });
 
-    let conn = actix_connect::default_connector();
+    let connector = Connector::default().service();
     let addr = format!("localhost:{}", srv.port());
-    let con = conn.call(addr.into()).await.unwrap();
+    let con = connector.call(addr.into()).await.unwrap();
     assert_eq!(con.peer_addr().unwrap(), srv.addr());
 }
 
@@ -42,7 +42,7 @@ async fn test_rustls_string() {
         })
     });
 
-    let conn = actix_connect::default_connector();
+    let conn = Connector::default().service();
     let addr = format!("localhost:{}", srv.port());
     let con = conn.call(addr.into()).await.unwrap();
     assert_eq!(con.peer_addr().unwrap(), srv.addr());
@@ -58,23 +58,29 @@ async fn test_static_str() {
         })
     });
 
-    let conn = actix_connect::default_connector();
+    let info = ConnectInfo::with_addr("10", srv.addr());
+    let connector = Connector::default().service();
+    let conn = connector.call(info).await.unwrap();
+    assert_eq!(conn.peer_addr().unwrap(), srv.addr());
 
-    let con = conn
-        .call(Connect::with_addr("10", srv.addr()))
-        .await
-        .unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
-
-    let connect = Connect::new(srv.host().to_owned());
-
-    let conn = actix_connect::default_connector();
-    let con = conn.call(connect).await;
-    assert!(con.is_err());
+    let info = ConnectInfo::new(srv.host().to_owned());
+    let connector = Connector::default().service();
+    let conn = connector.call(info).await;
+    assert!(conn.is_err());
 }
 
 #[actix_rt::test]
-async fn test_new_service() {
+async fn service_factory() {
+    pub fn default_connector_factory<T: Host + 'static>() -> impl ServiceFactory<
+        ConnectInfo<T>,
+        Config = (),
+        Response = Connection<T, TcpStream>,
+        Error = ConnectError,
+        InitError = (),
+    > {
+        Connector::default()
+    }
+
     let srv = TestServer::with(|| {
         fn_service(|io: TcpStream| async {
             let mut framed = Framed::new(io, BytesCodec);
@@ -83,14 +89,11 @@ async fn test_new_service() {
         })
     });
 
-    let factory = actix_connect::default_connector_factory();
-
-    let conn = factory.new_service(()).await.unwrap();
-    let con = conn
-        .call(Connect::with_addr("10", srv.addr()))
-        .await
-        .unwrap();
-    assert_eq!(con.peer_addr().unwrap(), srv.addr());
+    let info = ConnectInfo::with_addr("10", srv.addr());
+    let factory = default_connector_factory();
+    let connector = factory.new_service(()).await.unwrap();
+    let con = connector.call(info).await;
+    assert_eq!(con.unwrap().peer_addr().unwrap(), srv.addr());
 }
 
 #[cfg(all(feature = "openssl", feature = "uri"))]
@@ -106,9 +109,9 @@ async fn test_openssl_uri() {
         })
     });
 
-    let conn = actix_connect::default_connector();
+    let connector = Connector::default().service();
     let addr = http::Uri::try_from(format!("https://localhost:{}", srv.port())).unwrap();
-    let con = conn.call(addr.into()).await.unwrap();
+    let con = connector.call(addr.into()).await.unwrap();
     assert_eq!(con.peer_addr().unwrap(), srv.addr());
 }
 
@@ -125,7 +128,7 @@ async fn test_rustls_uri() {
         })
     });
 
-    let conn = actix_connect::default_connector();
+    let conn = Connector::default().service();
     let addr = http::Uri::try_from(format!("https://localhost:{}", srv.port())).unwrap();
     let con = conn.call(addr.into()).await.unwrap();
     assert_eq!(con.peer_addr().unwrap(), srv.addr());
@@ -141,11 +144,11 @@ async fn test_local_addr() {
         })
     });
 
-    let conn = actix_connect::default_connector();
+    let conn = Connector::default().service();
     let local = IpAddr::V4(Ipv4Addr::new(127, 0, 0, 3));
 
     let (con, _) = conn
-        .call(Connect::with_addr("10", srv.addr()).set_local_addr(local))
+        .call(ConnectInfo::with_addr("10", srv.addr()).set_local_addr(local))
         .await
         .unwrap()
         .into_parts();

actix-tls/tests/test_resolvers.rs

@@ -10,7 +10,9 @@ use actix_server::TestServer;
 use actix_service::{fn_service, Service, ServiceFactory};
 use futures_core::future::LocalBoxFuture;
 
-use actix_tls::connect::{new_connector_factory, Connect, Resolve, Resolver};
+use actix_tls::connect::{
+    ConnectError, ConnectInfo, Connection, Connector, Host, Resolve, Resolver,
+};
 
 #[actix_rt::test]
 async fn custom_resolver() {
@@ -36,6 +38,18 @@ async fn custom_resolver() {
 
 #[actix_rt::test]
 async fn custom_resolver_connect() {
+    pub fn connector_factory<T: Host + 'static>(
+        resolver: Resolver,
+    ) -> impl ServiceFactory<
+        ConnectInfo<T>,
+        Config = (),
+        Response = Connection<T, TcpStream>,
+        Error = ConnectError,
+        InitError = (),
+    > {
+        Connector::new(resolver)
+    }
+
     use trust_dns_resolver::TokioAsyncResolver;
 
     let srv =
@@ -68,12 +82,11 @@ async fn custom_resolver_connect() {
         trust_dns: TokioAsyncResolver::tokio_from_system_conf().unwrap(),
     };
 
-    let resolver = Resolver::new_custom(resolver);
-    let factory = new_connector_factory(resolver);
+    let factory = connector_factory(Resolver::custom(resolver));
 
     let conn = factory.new_service(()).await.unwrap();
     let con = conn
-        .call(Connect::with_addr("example.com", srv.addr()))
+        .call(ConnectInfo::with_addr("example.com", srv.addr()))
         .await
         .unwrap();
     assert_eq!(con.peer_addr().unwrap(), srv.addr());

actix-utils/Cargo.toml

@@ -23,3 +23,4 @@ local-waker = "0.1"
 [dev-dependencies]
 actix-rt = "2.0.0"
 futures-util = { version = "0.3.7", default-features = false }
+static_assertions = "1.1"

actix-utils/src/counter.rs

@@ -26,7 +26,7 @@ impl Counter {
         CounterGuard::new(self.0.clone())
     }
 
-    /// Notify current task and return true if counter is at capacity.
+    /// Returns true if counter is below capacity. Otherwise, register to wake task when it is.
     pub fn available(&self, cx: &mut task::Context<'_>) -> bool {
         self.0.available(cx)
     }

actix-utils/src/future/ready.rs

@@ -103,10 +103,16 @@ pub fn err<T, E>(err: E) -> Ready<Result<T, E>> {
 
 #[cfg(test)]
 mod tests {
+    use std::rc::Rc;
+
     use futures_util::task::noop_waker;
+    use static_assertions::{assert_impl_all, assert_not_impl_all};
 
     use super::*;
 
+    assert_impl_all!(Ready<()>: Send, Sync, Clone);
+    assert_not_impl_all!(Ready<Rc<()>>: Send, Sync);
+
     #[test]
     #[should_panic]
     fn multiple_poll_panics() {

bytestring/Cargo.toml

@@ -10,7 +10,6 @@ keywords = ["string", "bytes", "utf8", "web", "actix"]
 categories = ["no-std", "web-programming"]
 homepage = "https://actix.rs"
 repository = "https://github.com/actix/actix-net.git"
-documentation = "https://docs.rs/bytestring"
 license = "MIT OR Apache-2.0"
 edition = "2018"
 
@@ -23,6 +22,7 @@ bytes = "1"
 serde = { version = "1.0", optional = true }
 
 [dev-dependencies]
+ahash = { version = "0.7.6", default-features = false }
 serde_json = "1.0"
-# TODO: remove when ahash MSRV is restored
-ahash = { version = "=0.7.4", default-features = false }
+static_assertions = "1.1"
+rustversion = "1"

bytestring/src/lib.rs

@@ -2,8 +2,7 @@
 
 #![no_std]
 #![deny(rust_2018_idioms, nonstandard_style)]
-#![doc(html_logo_url = "https://actix.rs/img/logo.png")]
-#![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
+#![warn(missing_docs)]
 
 extern crate alloc;
 
@@ -217,6 +216,16 @@ mod serde {
             String::deserialize(deserializer).map(ByteString::from)
         }
     }
+
+    #[cfg(test)]
+    mod serde_impl_tests {
+        use super::*;
+
+        use serde::de::DeserializeOwned;
+        use static_assertions::assert_impl_all;
+
+        assert_impl_all!(ByteString: Serialize, DeserializeOwned);
+    }
 }
 
 #[cfg(test)]
@@ -225,9 +234,24 @@ mod test {
     use core::hash::{Hash, Hasher};
 
     use ahash::AHasher;
+    use static_assertions::assert_impl_all;
 
     use super::*;
 
+    assert_impl_all!(ByteString: Send, Sync, Unpin, Sized);
+    assert_impl_all!(ByteString: Clone, Default, Eq, PartialOrd, Ord);
+    assert_impl_all!(ByteString: fmt::Debug, fmt::Display);
+
+    #[rustversion::since(1.56)]
+    mod above_1_56_impls {
+        // `[Ref]UnwindSafe` traits were only in std until rust 1.56
+
+        use core::panic::{RefUnwindSafe, UnwindSafe};
+
+        use super::*;
+        assert_impl_all!(ByteString: UnwindSafe, RefUnwindSafe);
+    }
+
     #[test]
     fn test_partial_eq() {
         let s: ByteString = ByteString::from_static("test");

local-channel/src/lib.rs

@@ -1,3 +1,8 @@
 //! Non-thread-safe channels.
 
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(missing_docs)]
+
+extern crate alloc;
+
 pub mod mpsc;

local-channel/src/mpsc.rs

@@ -1,13 +1,13 @@
 //! A non-thread-safe multi-producer, single-consumer, futures-aware, FIFO queue.
 
+use alloc::{collections::VecDeque, rc::Rc};
 use core::{
     cell::RefCell,
     fmt,
     pin::Pin,
     task::{Context, Poll},
 };
-
-use std::{collections::VecDeque, error::Error, rc::Rc};
+use std::error::Error;
 
 use futures_core::stream::Stream;
 use futures_sink::Sink;

local-waker/src/lib.rs

@@ -3,6 +3,8 @@
 //! See docs for [`LocalWaker`].
 
 #![no_std]
+#![deny(rust_2018_idioms, nonstandard_style)]
+#![warn(missing_docs)]
 
 use core::{cell::Cell, fmt, marker::PhantomData, task::Waker};