diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7d0520d52..dc0ff0c19 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,6 +26,21 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      # install OpenSSL on Windows
+      - name: Set vcpkg root
+        if: matrix.target.triple == 'x86_64-pc-windows-msvc'
+        run: echo "VCPKG_ROOT=$env:VCPKG_INSTALLATION_ROOT" | Out-File -FilePath $env:GITHUB_ENV -Append
+      - name: Install OpenSSL
+        if: matrix.target.triple == 'x86_64-pc-windows-msvc'
+        run: vcpkg install openssl:x64-windows
+
+      - name: Install ${{ matrix.version }}
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.version }}-${{ matrix.target.triple }}
+          profile: minimal
+          override: true
+
       - name: Install ${{ matrix.version }}
         uses: actions-rs/toolchain@v1
         with:
diff --git a/Cargo.toml b/Cargo.toml
index 8477c8ede..0877edf9c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -111,12 +111,6 @@ tls-openssl = { package = "openssl", version = "0.10.9", optional = true }
 tls-rustls = { package = "rustls", version = "0.19.0", optional = true }
 url = "2.1"
 
-[target.'cfg(windows)'.dependencies.tls-openssl]
-version = "0.10.9"
-package = "openssl"
-features = ["vendored"]
-optional = true
-
 [dev-dependencies]
 brotli2 = "0.3.2"
 criterion = "0.3"
diff --git a/actix-http-test/Cargo.toml b/actix-http-test/Cargo.toml
index 69b2a3335..c1e61556b 100644
--- a/actix-http-test/Cargo.toml
+++ b/actix-http-test/Cargo.toml
@@ -50,12 +50,6 @@ serde_urlencoded = "0.7"
 time = { version = "0.2.23", default-features = false, features = ["std"] }
 tls-openssl = { version = "0.10.9", package = "openssl", optional = true }
 
-[target.'cfg(windows)'.dependencies.tls-openssl]
-version = "0.10.9"
-package = "openssl"
-features = ["vendored"]
-optional = true
-
 [dev-dependencies]
 actix-web = { version = "4.0.0-beta.4", default-features = false, features = ["cookies"] }
 actix-http = "3.0.0-beta.4"
diff --git a/actix-http/Cargo.toml b/actix-http/Cargo.toml
index edcc7efd5..e1aebb76b 100644
--- a/actix-http/Cargo.toml
+++ b/actix-http/Cargo.toml
@@ -98,11 +98,6 @@ serde_derive = "1.0"
 tls-openssl = { version = "0.10", package = "openssl" }
 tls-rustls = { version = "0.19", package = "rustls" }
 
-[target.'cfg(windows)'.dev-dependencies.tls-openssl]
-version = "0.10.9"
-package = "openssl"
-features = ["vendored"]
-
 [[example]]
 name = "ws"
 required-features = ["rustls"]
diff --git a/actix-http/examples/echo.rs b/actix-http/examples/echo.rs
index 90d768cbe..176ac5c2b 100644
--- a/actix-http/examples/echo.rs
+++ b/actix-http/examples/echo.rs
@@ -3,7 +3,7 @@ use std::{env, io};
 use actix_http::{Error, HttpService, Request, Response};
 use actix_server::Server;
 use bytes::BytesMut;
-use futures_util::StreamExt;
+use futures_util::StreamExt as _;
 use http::header::HeaderValue;
 use log::info;
 
diff --git a/actix-http/examples/echo2.rs b/actix-http/examples/echo2.rs
index bc932ce8f..408a40114 100644
--- a/actix-http/examples/echo2.rs
+++ b/actix-http/examples/echo2.rs
@@ -4,7 +4,7 @@ use actix_http::http::HeaderValue;
 use actix_http::{Error, HttpService, Request, Response};
 use actix_server::Server;
 use bytes::BytesMut;
-use futures_util::StreamExt;
+use futures_util::StreamExt as _;
 use log::info;
 
 async fn handle_request(mut req: Request) -> Result<Response, Error> {
diff --git a/actix-http/src/client/connection.rs b/actix-http/src/client/connection.rs
index 97ecd0515..291148b5b 100644
--- a/actix-http/src/client/connection.rs
+++ b/actix-http/src/client/connection.rs
@@ -19,6 +19,10 @@ use super::error::SendRequestError;
 use super::pool::Acquired;
 use super::{h1proto, h2proto};
 
+pub trait ConnectionIo: AsyncRead + AsyncWrite + Unpin + 'static {}
+
+impl<T: AsyncRead + AsyncWrite + Unpin + 'static> ConnectionIo for T {}
+
 pub(crate) enum ConnectionType<Io> {
     H1(Io),
     H2(H2Connection),
@@ -94,14 +98,6 @@ pub trait Connection {
     >;
 }
 
-pub(crate) trait ConnectionLifetime: AsyncRead + AsyncWrite + 'static {
-    /// Close connection
-    fn close(self: Pin<&mut Self>);
-
-    /// Release connection to the connection pool
-    fn release(self: Pin<&mut Self>);
-}
-
 #[doc(hidden)]
 /// HTTP client connection
 pub struct IoConnection<T>
@@ -110,7 +106,7 @@ where
 {
     io: Option<ConnectionType<T>>,
     created: time::Instant,
-    pool: Option<Acquired<T>>,
+    pool: Acquired<T>,
 }
 
 impl<T> fmt::Debug for IoConnection<T>
@@ -130,7 +126,7 @@ impl<T: AsyncRead + AsyncWrite + Unpin> IoConnection<T> {
     pub(crate) fn new(
         io: ConnectionType<T>,
         created: time::Instant,
-        pool: Option<Acquired<T>>,
+        pool: Acquired<T>,
     ) -> Self {
         IoConnection {
             pool,
@@ -139,13 +135,9 @@ impl<T: AsyncRead + AsyncWrite + Unpin> IoConnection<T> {
         }
     }
 
-    pub(crate) fn into_inner(self) -> (ConnectionType<T>, time::Instant) {
-        (self.io.unwrap(), self.created)
-    }
-
     #[cfg(test)]
     pub(crate) fn into_parts(self) -> (ConnectionType<T>, time::Instant, Acquired<T>) {
-        (self.io.unwrap(), self.created, self.pool.unwrap())
+        (self.io.unwrap(), self.created, self.pool)
     }
 
     async fn send_request<B: MessageBody + 'static, H: Into<RequestHeadType>>(
@@ -173,13 +165,7 @@ impl<T: AsyncRead + AsyncWrite + Unpin> IoConnection<T> {
         match self.io.take().unwrap() {
             ConnectionType::H1(io) => h1proto::open_tunnel(io, head.into()).await,
             ConnectionType::H2(io) => {
-                if let Some(mut pool) = self.pool.take() {
-                    pool.release(IoConnection::new(
-                        ConnectionType::H2(io),
-                        self.created,
-                        None,
-                    ));
-                }
+                self.pool.release(ConnectionType::H2(io), self.created);
                 Err(SendRequestError::TunnelNotSupported)
             }
         }
diff --git a/actix-http/src/client/connector.rs b/actix-http/src/client/connector.rs
index ebdbbb6eb..0c9159b87 100644
--- a/actix-http/src/client/connector.rs
+++ b/actix-http/src/client/connector.rs
@@ -18,7 +18,7 @@ use futures_core::ready;
 use http::Uri;
 
 use super::config::ConnectorConfig;
-use super::connection::{Connection, EitherIoConnection};
+use super::connection::{Connection, ConnectionIo, EitherIoConnection};
 use super::error::ConnectError;
 use super::pool::ConnectionPool;
 use super::Connect;
@@ -61,9 +61,6 @@ pub struct Connector<T> {
     ssl: SslConnector,
 }
 
-pub trait Io: AsyncRead + AsyncWrite + Unpin {}
-impl<T: AsyncRead + AsyncWrite + Unpin> Io for T {}
-
 impl Connector<()> {
     #[allow(clippy::new_ret_no_self, clippy::let_unit_value)]
     pub fn new() -> Connector<
@@ -281,16 +278,16 @@ where
             pub type DummyService = Box<
                 dyn Service<
                     Connect,
-                    Response = (Box<dyn Io>, Protocol),
+                    Response = (Box<dyn ConnectionIo>, Protocol),
                     Error = ConnectError,
                     Future = futures_core::future::LocalBoxFuture<
                         'static,
-                        Result<(Box<dyn Io>, Protocol), ConnectError>,
+                        Result<(Box<dyn ConnectionIo>, Protocol), ConnectError>,
                     >,
                 >,
             >;
 
-            InnerConnector::<_, DummyService, _, Box<dyn Io>> {
+            InnerConnector::<_, DummyService, _, Box<dyn ConnectionIo>> {
                 tcp_pool: ConnectionPool::new(
                     tcp_service,
                     self.config.no_disconnect_timeout(),
@@ -334,9 +331,12 @@ where
                                     .map(|protos| protos.windows(2).any(|w| w == H2))
                                     .unwrap_or(false);
                                 if h2 {
-                                    (Box::new(sock) as Box<dyn Io>, Protocol::Http2)
+                                    (
+                                        Box::new(sock) as Box<dyn ConnectionIo>,
+                                        Protocol::Http2,
+                                    )
                                 } else {
-                                    (Box::new(sock) as Box<dyn Io>, Protocol::Http1)
+                                    (Box::new(sock) as _, Protocol::Http1)
                                 }
                             })
                             .map_err(ConnectError::from),
@@ -354,9 +354,9 @@ where
                                     .map(|protos| protos.windows(2).any(|w| w == H2))
                                     .unwrap_or(false);
                                 if h2 {
-                                    (Box::new(sock) as Box<dyn Io>, Protocol::Http2)
+                                    (Box::new(sock) as _, Protocol::Http2)
                                 } else {
-                                    (Box::new(sock) as Box<dyn Io>, Protocol::Http1)
+                                    (Box::new(sock) as _, Protocol::Http1)
                                 }
                             }),
                     ),
diff --git a/actix-http/src/client/h1proto.rs b/actix-http/src/client/h1proto.rs
index d2db18cec..75a3c1f3d 100644
--- a/actix-http/src/client/h1proto.rs
+++ b/actix-http/src/client/h1proto.rs
@@ -7,7 +7,7 @@ use actix_codec::{AsyncRead, AsyncWrite, Framed, ReadBuf};
 use bytes::buf::BufMut;
 use bytes::{Bytes, BytesMut};
 use futures_core::Stream;
-use futures_util::{future::poll_fn, SinkExt, StreamExt};
+use futures_util::{future::poll_fn, SinkExt as _};
 
 use crate::error::PayloadError;
 use crate::h1;
@@ -19,7 +19,7 @@ use crate::http::{
 use crate::message::{RequestHeadType, ResponseHead};
 use crate::payload::{Payload, PayloadStream};
 
-use super::connection::{ConnectionLifetime, ConnectionType, IoConnection};
+use super::connection::ConnectionType;
 use super::error::{ConnectError, SendRequestError};
 use super::pool::Acquired;
 use crate::body::{BodySize, MessageBody};
@@ -29,7 +29,7 @@ pub(crate) async fn send_request<T, B>(
     mut head: RequestHeadType,
     body: B,
     created: time::Instant,
-    pool: Option<Acquired<T>>,
+    acquired: Acquired<T>,
 ) -> Result<(ResponseHead, Payload), SendRequestError>
 where
     T: AsyncRead + AsyncWrite + Unpin + 'static,
@@ -42,9 +42,9 @@ where
         if let Some(host) = head.as_ref().uri.host() {
             let mut wrt = BytesMut::with_capacity(host.len() + 5).writer();
 
-            let _ = match head.as_ref().uri.port_u16() {
-                None | Some(80) | Some(443) => write!(wrt, "{}", host),
-                Some(port) => write!(wrt, "{}:{}", host, port),
+            match head.as_ref().uri.port_u16() {
+                None | Some(80) | Some(443) => write!(wrt, "{}", host)?,
+                Some(port) => write!(wrt, "{}:{}", host, port)?,
             };
 
             match wrt.get_mut().split().freeze().try_into_value() {
@@ -64,7 +64,7 @@ where
 
     let io = H1Connection {
         created,
-        pool,
+        acquired,
         io: Some(io),
     };
 
@@ -77,10 +77,8 @@ where
     let is_expect = if head.as_ref().headers.contains_key(EXPECT) {
         match body.size() {
             BodySize::None | BodySize::Empty | BodySize::Sized(0) => {
-                let pin_framed = Pin::new(&mut framed);
-
-                let force_close = !pin_framed.codec_ref().keepalive();
-                release_connection(pin_framed, force_close);
+                let keep_alive = framed.codec_ref().keepalive();
+                framed.io_mut().on_release(keep_alive);
 
                 // TODO: use a new variant or a new type better describing error violate
                 // `Requirements for clients` session of above RFC
@@ -128,8 +126,9 @@ where
 
     match pin_framed.codec_ref().message_type() {
         h1::MessageType::None => {
-            let force_close = !pin_framed.codec_ref().keepalive();
-            release_connection(pin_framed, force_close);
+            let keep_alive = pin_framed.codec_ref().keepalive();
+            pin_framed.io_mut().on_release(keep_alive);
+
             Ok((head, Payload::None))
         }
         _ => {
@@ -151,12 +150,11 @@ where
     framed.send((head, BodySize::None).into()).await?;
 
     // read response
-    if let (Some(result), framed) = framed.into_future().await {
-        let head = result.map_err(SendRequestError::from)?;
-        Ok((head, framed))
-    } else {
-        Err(SendRequestError::from(ConnectError::Disconnected))
-    }
+    let head = poll_fn(|cx| Pin::new(&mut framed).poll_next(cx))
+        .await
+        .ok_or(ConnectError::Disconnected)??;
+
+    Ok((head, framed))
 }
 
 /// send request body to the peer
@@ -165,7 +163,7 @@ pub(crate) async fn send_body<T, B>(
     mut framed: Pin<&mut Framed<T, h1::ClientCodec>>,
 ) -> Result<(), SendRequestError>
 where
-    T: ConnectionLifetime + Unpin,
+    T: AsyncRead + AsyncWrite + Unpin + 'static,
     B: MessageBody,
 {
     actix_rt::pin!(body);
@@ -200,7 +198,7 @@ where
         }
     }
 
-    SinkExt::flush(Pin::into_inner(framed)).await?;
+    framed.get_mut().flush().await?;
     Ok(())
 }
 
@@ -208,41 +206,37 @@ where
 /// HTTP client connection
 pub struct H1Connection<T>
 where
-    T: AsyncWrite + Unpin + 'static,
+    T: AsyncRead + AsyncWrite + Unpin + 'static,
 {
     /// T should be `Unpin`
     io: Option<T>,
     created: time::Instant,
-    pool: Option<Acquired<T>>,
+    acquired: Acquired<T>,
 }
 
-impl<T> ConnectionLifetime for H1Connection<T>
+impl<T> H1Connection<T>
 where
     T: AsyncRead + AsyncWrite + Unpin + 'static,
 {
+    fn on_release(&mut self, keep_alive: bool) {
+        if keep_alive {
+            self.release();
+        } else {
+            self.close();
+        }
+    }
+
     /// Close connection
-    fn close(mut self: Pin<&mut Self>) {
-        if let Some(mut pool) = self.pool.take() {
-            if let Some(io) = self.io.take() {
-                pool.close(IoConnection::new(
-                    ConnectionType::H1(io),
-                    self.created,
-                    None,
-                ));
-            }
+    fn close(&mut self) {
+        if let Some(io) = self.io.take() {
+            self.acquired.close(ConnectionType::H1(io));
         }
     }
 
     /// Release this connection to the connection pool
-    fn release(mut self: Pin<&mut Self>) {
-        if let Some(mut pool) = self.pool.take() {
-            if let Some(io) = self.io.take() {
-                pool.release(IoConnection::new(
-                    ConnectionType::H1(io),
-                    self.created,
-                    None,
-                ));
-            }
+    fn release(&mut self) {
+        if let Some(io) = self.io.take() {
+            self.acquired.release(ConnectionType::H1(io), self.created);
         }
     }
 }
@@ -282,13 +276,19 @@ impl<T: AsyncRead + AsyncWrite + Unpin + 'static> AsyncWrite for H1Connection<T>
 }
 
 #[pin_project::pin_project]
-pub(crate) struct PlStream<Io> {
+pub(crate) struct PlStream<Io>
+where
+    Io: AsyncRead + AsyncWrite + Unpin + 'static,
+{
     #[pin]
-    framed: Option<Framed<Io, h1::ClientPayloadCodec>>,
+    framed: Option<Framed<H1Connection<Io>, h1::ClientPayloadCodec>>,
 }
 
-impl<Io: ConnectionLifetime> PlStream<Io> {
-    fn new(framed: Framed<Io, h1::ClientCodec>) -> Self {
+impl<Io> PlStream<Io>
+where
+    Io: AsyncRead + AsyncWrite + Unpin + 'static,
+{
+    fn new(framed: Framed<H1Connection<Io>, h1::ClientCodec>) -> Self {
         let framed = framed.into_map_codec(|codec| codec.into_payload_codec());
 
         PlStream {
@@ -297,24 +297,26 @@ impl<Io: ConnectionLifetime> PlStream<Io> {
     }
 }
 
-impl<Io: ConnectionLifetime> Stream for PlStream<Io> {
+impl<Io> Stream for PlStream<Io>
+where
+    Io: AsyncRead + AsyncWrite + Unpin + 'static,
+{
     type Item = Result<Bytes, PayloadError>;
 
     fn poll_next(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
     ) -> Poll<Option<Self::Item>> {
-        let mut this = self.project();
+        let mut framed = self.project().framed.as_pin_mut().unwrap();
 
-        match this.framed.as_mut().as_pin_mut().unwrap().next_item(cx)? {
+        match framed.as_mut().next_item(cx)? {
             Poll::Pending => Poll::Pending,
             Poll::Ready(Some(chunk)) => {
                 if let Some(chunk) = chunk {
                     Poll::Ready(Some(Ok(chunk)))
                 } else {
-                    let framed = this.framed.as_mut().as_pin_mut().unwrap();
-                    let force_close = !framed.codec_ref().keepalive();
-                    release_connection(framed, force_close);
+                    let keep_alive = framed.codec_ref().keepalive();
+                    framed.io_mut().on_release(keep_alive);
                     Poll::Ready(None)
                 }
             }
@@ -322,14 +324,3 @@ impl<Io: ConnectionLifetime> Stream for PlStream<Io> {
         }
     }
 }
-
-fn release_connection<T, U>(framed: Pin<&mut Framed<T, U>>, force_close: bool)
-where
-    T: ConnectionLifetime,
-{
-    if !force_close && framed.is_read_buf_empty() && framed.is_write_buf_empty() {
-        framed.io_pin().release()
-    } else {
-        framed.io_pin().close()
-    }
-}
diff --git a/actix-http/src/client/h2proto.rs b/actix-http/src/client/h2proto.rs
index 7292972de..82e81c7ff 100644
--- a/actix-http/src/client/h2proto.rs
+++ b/actix-http/src/client/h2proto.rs
@@ -17,7 +17,7 @@ use crate::message::{RequestHeadType, ResponseHead};
 use crate::payload::Payload;
 
 use super::config::ConnectorConfig;
-use super::connection::{ConnectionType, IoConnection};
+use super::connection::ConnectionType;
 use super::error::SendRequestError;
 use super::pool::Acquired;
 use crate::client::connection::H2Connection;
@@ -27,7 +27,7 @@ pub(crate) async fn send_request<T, B>(
     head: RequestHeadType,
     body: B,
     created: time::Instant,
-    pool: Option<Acquired<T>>,
+    acquired: Acquired<T>,
 ) -> Result<(ResponseHead, Payload), SendRequestError>
 where
     T: AsyncRead + AsyncWrite + Unpin + 'static,
@@ -103,13 +103,13 @@ where
 
     let res = poll_fn(|cx| io.poll_ready(cx)).await;
     if let Err(e) = res {
-        release(io, pool, created, e.is_io());
+        release(io, acquired, created, e.is_io());
         return Err(SendRequestError::from(e));
     }
 
     let resp = match io.send_request(req, eof) {
         Ok((fut, send)) => {
-            release(io, pool, created, false);
+            release(io, acquired, created, false);
 
             if !eof {
                 send_body(body, send).await?;
@@ -117,7 +117,7 @@ where
             fut.await.map_err(SendRequestError::from)?
         }
         Err(e) => {
-            release(io, pool, created, e.is_io());
+            release(io, acquired, created, e.is_io());
             return Err(e.into());
         }
     };
@@ -181,16 +181,14 @@ async fn send_body<B: MessageBody>(
 /// release SendRequest object
 fn release<T: AsyncRead + AsyncWrite + Unpin + 'static>(
     io: H2Connection,
-    pool: Option<Acquired<T>>,
+    acquired: Acquired<T>,
     created: time::Instant,
     close: bool,
 ) {
-    if let Some(mut pool) = pool {
-        if close {
-            pool.close(IoConnection::new(ConnectionType::H2(io), created, None));
-        } else {
-            pool.release(IoConnection::new(ConnectionType::H2(io), created, None));
-        }
+    if close {
+        acquired.close(ConnectionType::H2(io));
+    } else {
+        acquired.release(ConnectionType::H2(io), created);
     }
 }
 
diff --git a/actix-http/src/client/mod.rs b/actix-http/src/client/mod.rs
index c6f998c2a..ce6aa3bc1 100644
--- a/actix-http/src/client/mod.rs
+++ b/actix-http/src/client/mod.rs
@@ -14,7 +14,7 @@ pub use actix_tls::connect::{
     Connect as TcpConnect, ConnectError as TcpConnectError, Connection as TcpConnection,
 };
 
-pub use self::connection::Connection;
+pub use self::connection::{Connection, ConnectionIo};
 pub use self::connector::Connector;
 pub use self::error::{ConnectError, FreezeRequestError, InvalidUrl, SendRequestError};
 pub use crate::Protocol;
diff --git a/actix-http/src/client/pool.rs b/actix-http/src/client/pool.rs
index b5b4a30d3..79adcf3e2 100644
--- a/actix-http/src/client/pool.rs
+++ b/actix-http/src/client/pool.rs
@@ -217,7 +217,7 @@ where
 
             // construct acquired. It's used to put Io type back to pool/ close the Io type.
             // permit is carried with the whole lifecycle of Acquired.
-            let acquired = Some(Acquired { key, inner, permit });
+            let acquired = Acquired { key, inner, permit };
 
             // match the connection and spawn new one if did not get anything.
             match conn {
@@ -235,7 +235,7 @@ where
                             acquired,
                         ))
                     } else {
-                        let config = &acquired.as_ref().unwrap().inner.config;
+                        let config = &acquired.inner.config;
                         let (sender, connection) = handshake(io, config).await?;
                         Ok(IoConnection::new(
                             ConnectionType::H2(H2Connection::new(sender, connection)),
@@ -346,14 +346,12 @@ where
     Io: AsyncRead + AsyncWrite + Unpin + 'static,
 {
     /// Close the IO.
-    pub(crate) fn close(&mut self, conn: IoConnection<Io>) {
-        let (conn, _) = conn.into_inner();
+    pub(crate) fn close(&self, conn: ConnectionType<Io>) {
         self.inner.close(conn);
     }
 
     /// Release IO back into pool.
-    pub(crate) fn release(&mut self, conn: IoConnection<Io>) {
-        let (io, created) = conn.into_inner();
+    pub(crate) fn release(&self, conn: ConnectionType<Io>, created: Instant) {
         let Acquired { key, inner, .. } = self;
 
         inner
@@ -362,12 +360,12 @@ where
             .entry(key.clone())
             .or_insert_with(VecDeque::new)
             .push_back(PooledConnection {
-                conn: io,
+                conn,
                 created,
                 used: Instant::now(),
             });
 
-        let _ = &mut self.permit;
+        let _ = &self.permit;
     }
 }
 
@@ -447,8 +445,8 @@ mod test {
     where
         T: AsyncRead + AsyncWrite + Unpin + 'static,
     {
-        let (conn, created, mut acquired) = conn.into_parts();
-        acquired.release(IoConnection::new(conn, created, None));
+        let (conn, created, acquired) = conn.into_parts();
+        acquired.release(conn, created);
     }
 
     #[actix_rt::test]
diff --git a/actix-http/src/h1/dispatcher.rs b/actix-http/src/h1/dispatcher.rs
index 5f64b168a..11ace7ca7 100644
--- a/actix-http/src/h1/dispatcher.rs
+++ b/actix-http/src/h1/dispatcher.rs
@@ -662,7 +662,7 @@ where
                     // got timeout during shutdown, drop connection
                     if this.flags.contains(Flags::SHUTDOWN) {
                         return Err(DispatchError::DisconnectTimeout);
-                    // exceed deadline. check for any outstanding tasks
+                        // exceed deadline. check for any outstanding tasks
                     } else if timer.deadline() >= *this.ka_expire {
                         // have no task at hand.
                         if this.state.is_empty() && this.write_buf.is_empty() {
@@ -695,15 +695,15 @@ where
                                 this.flags.insert(Flags::STARTED | Flags::SHUTDOWN);
                                 this.state.set(State::None);
                             }
-                        // still have unfinished task. try to reset and register keep-alive.
+                            // still have unfinished task. try to reset and register keep-alive.
                         } else if let Some(deadline) =
                             this.codec.config().keep_alive_expire()
                         {
                             timer.as_mut().reset(deadline);
                             let _ = timer.poll(cx);
                         }
-                    // timer resolved but still have not met the keep-alive expire deadline.
-                    // reset and register for later wakeup.
+                        // timer resolved but still have not met the keep-alive expire deadline.
+                        // reset and register for later wakeup.
                     } else {
                         timer.as_mut().reset(*this.ka_expire);
                         let _ = timer.poll(cx);
@@ -953,14 +953,15 @@ mod tests {
     use std::str;
 
     use actix_service::fn_service;
-    use futures_util::future::{lazy, ready};
+    use futures_util::future::{lazy, ready, Ready};
 
     use super::*;
-    use crate::test::TestBuffer;
-    use crate::{error::Error, KeepAlive};
     use crate::{
+        error::Error,
         h1::{ExpectHandler, UpgradeHandler},
-        test::TestSeqBuffer,
+        http::Method,
+        test::{TestBuffer, TestSeqBuffer},
+        HttpMessage, KeepAlive,
     };
 
     fn find_slice(haystack: &[u8], needle: &[u8], from: usize) -> Option<usize> {
@@ -1284,14 +1285,30 @@ mod tests {
 
     #[actix_rt::test]
     async fn test_upgrade() {
+        struct TestUpgrade;
+
+        impl<T> Service<(Request, Framed<T, Codec>)> for TestUpgrade {
+            type Response = ();
+            type Error = Error;
+            type Future = Ready<Result<Self::Response, Self::Error>>;
+
+            actix_service::always_ready!();
+
+            fn call(&self, (req, _framed): (Request, Framed<T, Codec>)) -> Self::Future {
+                assert_eq!(req.method(), Method::GET);
+                assert!(req.upgrade());
+                assert_eq!(req.headers().get("upgrade").unwrap(), "websocket");
+                ready(Ok(()))
+            }
+        }
+
         lazy(|cx| {
             let mut buf = TestSeqBuffer::empty();
             let cfg = ServiceConfig::new(KeepAlive::Disabled, 0, 0, false, None);
 
-            let services =
-                HttpFlow::new(ok_service(), ExpectHandler, Some(UpgradeHandler));
+            let services = HttpFlow::new(ok_service(), ExpectHandler, Some(TestUpgrade));
 
-            let h1 = Dispatcher::<_, _, _, _, UpgradeHandler>::new(
+            let h1 = Dispatcher::<_, _, _, _, TestUpgrade>::new(
                 buf.clone(),
                 cfg,
                 services,
diff --git a/actix-http/src/h1/expect.rs b/actix-http/src/h1/expect.rs
index 65856edf6..5015069bb 100644
--- a/actix-http/src/h1/expect.rs
+++ b/actix-http/src/h1/expect.rs
@@ -1,5 +1,3 @@
-use std::task::Poll;
-
 use actix_service::{Service, ServiceFactory};
 use futures_util::future::{ready, Ready};
 
diff --git a/actix-http/src/h1/upgrade.rs b/actix-http/src/h1/upgrade.rs
index 5e24d84e3..e57ea8ae9 100644
--- a/actix-http/src/h1/upgrade.rs
+++ b/actix-http/src/h1/upgrade.rs
@@ -1,8 +1,6 @@
-use std::task::Poll;
-
 use actix_codec::Framed;
 use actix_service::{Service, ServiceFactory};
-use futures_util::future::{ready, Ready};
+use futures_core::future::LocalBoxFuture;
 
 use crate::error::Error;
 use crate::h1::Codec;
@@ -16,7 +14,7 @@ impl<T> ServiceFactory<(Request, Framed<T, Codec>)> for UpgradeHandler {
     type Config = ();
     type Service = UpgradeHandler;
     type InitError = Error;
-    type Future = Ready<Result<Self::Service, Self::InitError>>;
+    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
 
     fn new_service(&self, _: ()) -> Self::Future {
         unimplemented!()
@@ -26,11 +24,11 @@ impl<T> ServiceFactory<(Request, Framed<T, Codec>)> for UpgradeHandler {
 impl<T> Service<(Request, Framed<T, Codec>)> for UpgradeHandler {
     type Response = ();
     type Error = Error;
-    type Future = Ready<Result<Self::Response, Self::Error>>;
+    type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
 
     actix_service::always_ready!();
 
     fn call(&self, _: (Request, Framed<T, Codec>)) -> Self::Future {
-        ready(Ok(()))
+        unimplemented!()
     }
 }
diff --git a/actix-http/src/h2/dispatcher.rs b/actix-http/src/h2/dispatcher.rs
index 958c761d5..6e6cd5a2f 100644
--- a/actix-http/src/h2/dispatcher.rs
+++ b/actix-http/src/h2/dispatcher.rs
@@ -5,8 +5,10 @@ use actix_codec::{AsyncRead, AsyncWrite};
 use actix_service::Service;
 use bytes::{Bytes, BytesMut};
 use futures_core::ready;
-use h2::server::{Connection, SendResponse};
-use h2::SendStream;
+use h2::{
+    server::{Connection, SendResponse},
+    SendStream,
+};
 use http::header::{HeaderValue, CONNECTION, CONTENT_LENGTH, DATE, TRANSFER_ENCODING};
 use log::{error, trace};
 
diff --git a/actix-http/src/h2/service.rs b/actix-http/src/h2/service.rs
index 1dc290e49..c64139564 100644
--- a/actix-http/src/h2/service.rs
+++ b/actix-http/src/h2/service.rs
@@ -13,7 +13,7 @@ use actix_service::{
 use bytes::Bytes;
 use futures_core::ready;
 use futures_util::future::ok;
-use h2::server::{self, Handshake};
+use h2::server::{handshake, Handshake};
 use log::error;
 
 use crate::body::MessageBody;
@@ -307,7 +307,7 @@ where
                 Some(self.cfg.clone()),
                 addr,
                 on_connect_data,
-                server::handshake(io),
+                handshake(io),
             ),
         }
     }
diff --git a/actix-http/src/helpers.rs b/actix-http/src/helpers.rs
index 13195f7db..74188717d 100644
--- a/actix-http/src/helpers.rs
+++ b/actix-http/src/helpers.rs
@@ -1,15 +1,15 @@
 use std::io;
 
-use bytes::{BufMut, BytesMut};
+use bytes::BufMut;
 use http::Version;
 
 const DIGITS_START: u8 = b'0';
 
-pub(crate) fn write_status_line(version: Version, n: u16, bytes: &mut BytesMut) {
+pub(crate) fn write_status_line<B: BufMut>(version: Version, n: u16, buf: &mut B) {
     match version {
-        Version::HTTP_11 => bytes.put_slice(b"HTTP/1.1 "),
-        Version::HTTP_10 => bytes.put_slice(b"HTTP/1.0 "),
-        Version::HTTP_09 => bytes.put_slice(b"HTTP/0.9 "),
+        Version::HTTP_11 => buf.put_slice(b"HTTP/1.1 "),
+        Version::HTTP_10 => buf.put_slice(b"HTTP/1.0 "),
+        Version::HTTP_09 => buf.put_slice(b"HTTP/0.9 "),
         _ => {
             // other HTTP version handlers do not use this method
         }
@@ -19,33 +19,36 @@ pub(crate) fn write_status_line(version: Version, n: u16, bytes: &mut BytesMut)
     let d10 = ((n / 10) % 10) as u8;
     let d1 = (n % 10) as u8;
 
-    bytes.put_u8(DIGITS_START + d100);
-    bytes.put_u8(DIGITS_START + d10);
-    bytes.put_u8(DIGITS_START + d1);
+    buf.put_u8(DIGITS_START + d100);
+    buf.put_u8(DIGITS_START + d10);
+    buf.put_u8(DIGITS_START + d1);
 
     // trailing space before reason
-    bytes.put_u8(b' ');
+    buf.put_u8(b' ');
 }
 
 /// NOTE: bytes object has to contain enough space
-pub fn write_content_length(n: u64, bytes: &mut BytesMut) {
+pub fn write_content_length<B: BufMut>(n: u64, buf: &mut B) {
     if n == 0 {
-        bytes.put_slice(b"\r\ncontent-length: 0\r\n");
+        buf.put_slice(b"\r\ncontent-length: 0\r\n");
         return;
     }
 
-    let mut buf = itoa::Buffer::new();
+    let mut buffer = itoa::Buffer::new();
 
-    bytes.put_slice(b"\r\ncontent-length: ");
-    bytes.put_slice(buf.format(n).as_bytes());
-    bytes.put_slice(b"\r\n");
+    buf.put_slice(b"\r\ncontent-length: ");
+    buf.put_slice(buffer.format(n).as_bytes());
+    buf.put_slice(b"\r\n");
 }
 
-pub(crate) struct Writer<'a>(pub &'a mut BytesMut);
+pub(crate) struct Writer<'a, B>(pub &'a mut B);
 
-impl<'a> io::Write for Writer<'a> {
+impl<'a, B> io::Write for Writer<'a, B>
+where
+    B: BufMut,
+{
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.0.extend_from_slice(buf);
+        self.0.put_slice(buf);
         Ok(buf.len())
     }
 
@@ -58,6 +61,8 @@ impl<'a> io::Write for Writer<'a> {
 mod tests {
     use std::str::from_utf8;
 
+    use bytes::BytesMut;
+
     use super::*;
 
     #[test]
diff --git a/actix-http/src/service.rs b/actix-http/src/service.rs
index 89f3e3bb1..1a06cec3d 100644
--- a/actix-http/src/service.rs
+++ b/actix-http/src/service.rs
@@ -1,14 +1,19 @@
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
-use std::{fmt, net, rc::Rc};
+use std::{
+    fmt,
+    future::Future,
+    marker::PhantomData,
+    net,
+    pin::Pin,
+    rc::Rc,
+    task::{Context, Poll},
+};
 
 use actix_codec::{AsyncRead, AsyncWrite, Framed};
 use actix_rt::net::TcpStream;
 use actix_service::{pipeline_factory, IntoServiceFactory, Service, ServiceFactory};
 use bytes::Bytes;
-use futures_core::{ready, Future};
-use h2::server::{self, Handshake};
+use futures_core::ready;
+use h2::server::{handshake, Handshake};
 use pin_project::pin_project;
 
 use crate::body::MessageBody;
@@ -562,7 +567,7 @@ where
         match proto {
             Protocol::Http2 => HttpServiceHandlerResponse {
                 state: State::H2Handshake(Some((
-                    server::handshake(io),
+                    handshake(io),
                     self.cfg.clone(),
                     self.flow.clone(),
                     on_connect_data,
diff --git a/actix-http/src/time_parser.rs b/actix-http/src/time_parser.rs
index 46bf73037..fd82fd42e 100644
--- a/actix-http/src/time_parser.rs
+++ b/actix-http/src/time_parser.rs
@@ -1,7 +1,7 @@
 use time::{Date, OffsetDateTime, PrimitiveDateTime};
 
 /// Attempt to parse a `time` string as one of either RFC 1123, RFC 850, or asctime.
-pub fn parse_http_date(time: &str) -> Option<PrimitiveDateTime> {
+pub(crate) fn parse_http_date(time: &str) -> Option<PrimitiveDateTime> {
     try_parse_rfc_1123(time)
         .or_else(|| try_parse_rfc_850(time))
         .or_else(|| try_parse_asctime(time))
diff --git a/actix-http/tests/test_client.rs b/actix-http/tests/test_client.rs
index a50f2404d..758e39745 100644
--- a/actix-http/tests/test_client.rs
+++ b/actix-http/tests/test_client.rs
@@ -6,7 +6,7 @@ use actix_service::ServiceFactoryExt;
 use bytes::Bytes;
 use futures_util::{
     future::{self, ok},
-    StreamExt,
+    StreamExt as _,
 };
 
 const STR: &str = "Hello World Hello World Hello World Hello World Hello World \
diff --git a/actix-http/tests/test_openssl.rs b/actix-http/tests/test_openssl.rs
index d5ec645a4..49a68a60d 100644
--- a/actix-http/tests/test_openssl.rs
+++ b/actix-http/tests/test_openssl.rs
@@ -12,8 +12,11 @@ use actix_http::{body, Error, HttpService, Request, Response};
 use actix_http_test::test_server;
 use actix_service::{fn_service, ServiceFactoryExt};
 use bytes::{Bytes, BytesMut};
-use futures_util::future::{err, ok, ready};
-use futures_util::stream::{once, Stream, StreamExt};
+use futures_core::Stream;
+use futures_util::{
+    future::{err, ok, ready},
+    stream::{once, StreamExt as _},
+};
 use openssl::{
     pkey::PKey,
     ssl::{SslAcceptor, SslMethod},
diff --git a/actix-http/tests/test_rustls.rs b/actix-http/tests/test_rustls.rs
index 81edb5c18..7a3cb1473 100644
--- a/actix-http/tests/test_rustls.rs
+++ b/actix-http/tests/test_rustls.rs
@@ -10,8 +10,9 @@ use actix_http_test::test_server;
 use actix_service::{fn_factory_with_config, fn_service};
 
 use bytes::{Bytes, BytesMut};
+use futures_core::Stream;
 use futures_util::future::{self, err, ok};
-use futures_util::stream::{once, Stream, StreamExt};
+use futures_util::stream::{once, StreamExt as _};
 use rustls::{
     internal::pemfile::{certs, pkcs8_private_keys},
     NoClientAuth, ServerConfig as RustlsServerConfig,
diff --git a/actix-http/tests/test_server.rs b/actix-http/tests/test_server.rs
index a4c1f92b5..6d145400c 100644
--- a/actix-http/tests/test_server.rs
+++ b/actix-http/tests/test_server.rs
@@ -7,7 +7,7 @@ use actix_rt::time::sleep;
 use actix_service::fn_service;
 use bytes::Bytes;
 use futures_util::future::{self, err, ok, ready, FutureExt};
-use futures_util::stream::{once, StreamExt};
+use futures_util::stream::{once, StreamExt as _};
 use regex::Regex;
 
 use actix_http::HttpMessage;
diff --git a/actix-http/tests/test_ws.rs b/actix-http/tests/test_ws.rs
index 7ed9b0df1..3b90b4e54 100644
--- a/actix-http/tests/test_ws.rs
+++ b/actix-http/tests/test_ws.rs
@@ -12,7 +12,7 @@ use actix_utils::dispatcher::Dispatcher;
 use bytes::Bytes;
 use futures_util::future;
 use futures_util::task::{Context, Poll};
-use futures_util::{SinkExt, StreamExt};
+use futures_util::{SinkExt as _, StreamExt as _};
 
 struct WsService<T>(Arc<Mutex<(PhantomData<T>, Cell<bool>)>>);
 
diff --git a/awc/Cargo.toml b/awc/Cargo.toml
index 981b93a52..ec2e03a96 100644
--- a/awc/Cargo.toml
+++ b/awc/Cargo.toml
@@ -66,12 +66,6 @@ serde_urlencoded = "0.7"
 tls-openssl = { version = "0.10.9", package = "openssl", optional = true }
 tls-rustls = { version = "0.19.0", package = "rustls", optional = true, features = ["dangerous_configuration"] }
 
-[target.'cfg(windows)'.dependencies.tls-openssl]
-version = "0.10.9"
-package = "openssl"
-features = ["vendored"]
-optional = true
-
 [dev-dependencies]
 actix-web = { version = "4.0.0-beta.4", features = ["openssl"] }
 actix-http = { version = "3.0.0-beta.4", features = ["openssl"] }
diff --git a/awc/README.md b/awc/README.md
index ec3984d60..2e7dad320 100644
--- a/awc/README.md
+++ b/awc/README.md
@@ -27,7 +27,7 @@ fn main() {
 
         let res = client
             .get("http://www.rust-lang.org")    // <- Create request builder
-            .header("User-Agent", "Actix-web")
+            .insert_header(("User-Agent", "Actix-web"))
             .send()                             // <- Send http request
             .await;
 
diff --git a/awc/src/connect.rs b/awc/src/connect.rs
index a4abbc46b..d3bc01ed6 100644
--- a/awc/src/connect.rs
+++ b/awc/src/connect.rs
@@ -1,15 +1,16 @@
 use std::{
-    fmt,
     future::Future,
-    io, net,
+    net,
     pin::Pin,
     task::{Context, Poll},
 };
 
-use actix_codec::{AsyncRead, AsyncWrite, Framed, ReadBuf};
+use actix_codec::Framed;
 use actix_http::{
     body::Body,
-    client::{Connect as ClientConnect, ConnectError, Connection, SendRequestError},
+    client::{
+        Connect as ClientConnect, ConnectError, Connection, ConnectionIo, SendRequestError,
+    },
     h1::ClientCodec,
     Payload, RequestHead, RequestHeadType, ResponseHead,
 };
@@ -123,7 +124,7 @@ impl<Fut, C, Io> Future for ConnectRequestFuture<Fut, Io>
 where
     Fut: Future<Output = Result<C, ConnectError>>,
     C: Connection<Io = Io>,
-    Io: AsyncRead + AsyncWrite + Unpin + 'static,
+    Io: ConnectionIo,
 {
     type Output = Result<ConnectResponse, SendRequestError>;
 
@@ -138,14 +139,14 @@ where
                         let fut = ConnectRequestFuture::Client {
                             fut: connection.send_request(head, body),
                         };
-                        self.as_mut().set(fut);
+                        self.set(fut);
                     }
                     ConnectRequest::Tunnel(head, ..) => {
                         // send request
                         let fut = ConnectRequestFuture::Tunnel {
                             fut: connection.open_tunnel(RequestHeadType::from(head)),
                         };
-                        self.as_mut().set(fut);
+                        self.set(fut);
                     }
                 }
                 self.poll(cx)
@@ -158,65 +159,11 @@ where
             }
             ConnectRequestProj::Tunnel { fut } => {
                 let (head, framed) = ready!(fut.as_mut().poll(cx))?;
-                let framed = framed.into_map_io(|io| BoxedSocket(Box::new(Socket(io))));
+                let framed = framed.into_map_io(|io| Box::new(io) as _);
                 Poll::Ready(Ok(ConnectResponse::Tunnel(head, framed)))
             }
         }
     }
 }
 
-trait AsyncSocket {
-    fn as_read(&self) -> &(dyn AsyncRead + Unpin);
-    fn as_read_mut(&mut self) -> &mut (dyn AsyncRead + Unpin);
-    fn as_write(&mut self) -> &mut (dyn AsyncWrite + Unpin);
-}
-
-struct Socket<T: AsyncRead + AsyncWrite + Unpin>(T);
-
-impl<T: AsyncRead + AsyncWrite + Unpin> AsyncSocket for Socket<T> {
-    fn as_read(&self) -> &(dyn AsyncRead + Unpin) {
-        &self.0
-    }
-    fn as_read_mut(&mut self) -> &mut (dyn AsyncRead + Unpin) {
-        &mut self.0
-    }
-    fn as_write(&mut self) -> &mut (dyn AsyncWrite + Unpin) {
-        &mut self.0
-    }
-}
-
-pub struct BoxedSocket(Box<dyn AsyncSocket>);
-
-impl fmt::Debug for BoxedSocket {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "BoxedSocket")
-    }
-}
-
-impl AsyncRead for BoxedSocket {
-    fn poll_read(
-        self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-        buf: &mut ReadBuf<'_>,
-    ) -> Poll<io::Result<()>> {
-        Pin::new(self.get_mut().0.as_read_mut()).poll_read(cx, buf)
-    }
-}
-
-impl AsyncWrite for BoxedSocket {
-    fn poll_write(
-        self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-        buf: &[u8],
-    ) -> Poll<io::Result<usize>> {
-        Pin::new(self.get_mut().0.as_write()).poll_write(cx, buf)
-    }
-
-    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
-        Pin::new(self.get_mut().0.as_write()).poll_flush(cx)
-    }
-
-    fn poll_shutdown(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
-        Pin::new(self.get_mut().0.as_write()).poll_shutdown(cx)
-    }
-}
+pub type BoxedSocket = Box<dyn ConnectionIo>;
diff --git a/src/app_service.rs b/src/app_service.rs
index 9b4ae3354..be4ccf22f 100644
--- a/src/app_service.rs
+++ b/src/app_service.rs
@@ -1,6 +1,5 @@
 use std::cell::RefCell;
 use std::rc::Rc;
-use std::task::Poll;
 
 use actix_http::{Extensions, Request, Response};
 use actix_router::{Path, ResourceDef, Router, Url};
diff --git a/src/resource.rs b/src/resource.rs
index 944beeefa..1a5619de6 100644
--- a/src/resource.rs
+++ b/src/resource.rs
@@ -2,7 +2,6 @@ use std::cell::RefCell;
 use std::fmt;
 use std::future::Future;
 use std::rc::Rc;
-use std::task::Poll;
 
 use actix_http::{Error, Extensions, Response};
 use actix_router::IntoPattern;
diff --git a/src/scope.rs b/src/scope.rs
index dd02501b0..e96f5b9e8 100644
--- a/src/scope.rs
+++ b/src/scope.rs
@@ -2,7 +2,6 @@ use std::cell::RefCell;
 use std::fmt;
 use std::future::Future;
 use std::rc::Rc;
-use std::task::Poll;
 
 use actix_http::Extensions;
 use actix_router::{ResourceDef, Router};
diff --git a/src/server.rs b/src/server.rs
index d69d6570d..99355593a 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -12,13 +12,6 @@ use actix_http::{
 use actix_server::{Server, ServerBuilder};
 use actix_service::{map_config, IntoServiceFactory, Service, ServiceFactory};
 
-#[cfg(unix)]
-use actix_http::Protocol;
-#[cfg(unix)]
-use actix_service::pipeline_factory;
-#[cfg(unix)]
-use futures_util::future::ok;
-
 #[cfg(feature = "openssl")]
 use actix_tls::accept::openssl::{AlpnError, SslAcceptor, SslAcceptorBuilder};
 #[cfg(feature = "rustls")]
@@ -489,7 +482,9 @@ where
     #[cfg(unix)]
     /// Start listening for unix domain (UDS) connections on existing listener.
     pub fn listen_uds(mut self, lst: std::os::unix::net::UnixListener) -> io::Result<Self> {
+        use actix_http::Protocol;
         use actix_rt::net::UnixStream;
+        use actix_service::pipeline_factory;
 
         let cfg = self.config.clone();
         let factory = self.factory.clone();
@@ -511,19 +506,22 @@ where
                 c.host.clone().unwrap_or_else(|| format!("{}", socket_addr)),
             );
 
-            pipeline_factory(|io: UnixStream| ok((io, Protocol::Http1, None))).and_then({
-                let svc = HttpService::build()
-                    .keep_alive(c.keep_alive)
-                    .client_timeout(c.client_timeout);
+            pipeline_factory(|io: UnixStream| async { Ok((io, Protocol::Http1, None)) })
+                .and_then({
+                    let svc = HttpService::build()
+                        .keep_alive(c.keep_alive)
+                        .client_timeout(c.client_timeout);
 
-                let svc = if let Some(handler) = on_connect_fn.clone() {
-                    svc.on_connect_ext(move |io: &_, ext: _| (&*handler)(io as &dyn Any, ext))
-                } else {
-                    svc
-                };
+                    let svc = if let Some(handler) = on_connect_fn.clone() {
+                        svc.on_connect_ext(move |io: &_, ext: _| {
+                            (&*handler)(io as &dyn Any, ext)
+                        })
+                    } else {
+                        svc
+                    };
 
-                svc.finish(map_config(factory(), move |_| config.clone()))
-            })
+                    svc.finish(map_config(factory(), move |_| config.clone()))
+                })
         })?;
         Ok(self)
     }
@@ -534,7 +532,9 @@ where
     where
         A: AsRef<std::path::Path>,
     {
+        use actix_http::Protocol;
         use actix_rt::net::UnixStream;
+        use actix_service::pipeline_factory;
 
         let cfg = self.config.clone();
         let factory = self.factory.clone();
@@ -555,12 +555,13 @@ where
                     socket_addr,
                     c.host.clone().unwrap_or_else(|| format!("{}", socket_addr)),
                 );
-                pipeline_factory(|io: UnixStream| ok((io, Protocol::Http1, None))).and_then(
-                    HttpService::build()
-                        .keep_alive(c.keep_alive)
-                        .client_timeout(c.client_timeout)
-                        .finish(map_config(factory(), move |_| config.clone())),
-                )
+                pipeline_factory(|io: UnixStream| async { Ok((io, Protocol::Http1, None)) })
+                    .and_then(
+                        HttpService::build()
+                            .keep_alive(c.keep_alive)
+                            .client_timeout(c.client_timeout)
+                            .finish(map_config(factory(), move |_| config.clone())),
+                    )
             },
         )?;
         Ok(self)
diff --git a/src/types/path.rs b/src/types/path.rs
index 4ab124d53..294df6cf2 100644
--- a/src/types/path.rs
+++ b/src/types/path.rs
@@ -20,7 +20,7 @@ use crate::{dev::Payload, error::PathError, FromRequest, HttpRequest};
 /// // extract path info from "/{name}/{count}/index.html" into tuple
 /// // {name}  - deserialize a String
 /// // {count} - deserialize a u32
-/// #[get("/")]
+/// #[get("/{name}/{count}/index.html")]
 /// async fn index(path: web::Path<(String, u32)>) -> String {
 ///     let (name, count) = path.into_inner();
 ///     format!("Welcome {}! {}", name, count)
@@ -40,7 +40,7 @@ use crate::{dev::Payload, error::PathError, FromRequest, HttpRequest};
 /// }
 ///
 /// // extract `Info` from a path using serde
-/// #[get("/")]
+/// #[get("/{name}")]
 /// async fn index(info: web::Path<Info>) -> String {
 ///     format!("Welcome {}!", info.name)
 /// }