diff --git a/actix-http/examples/echo.rs b/actix-http/examples/echo.rs
index 22f553f38..0b1a5081c 100644
--- a/actix-http/examples/echo.rs
+++ b/actix-http/examples/echo.rs
@@ -15,6 +15,7 @@ async fn main() -> io::Result<()> {
             HttpService::build()
                 .client_timeout(1000)
                 .client_disconnect(1000)
+                // handles HTTP/1.1 and HTTP/2
                 .finish(|mut req: Request| async move {
                     let mut body = BytesMut::new();
                     while let Some(item) = req.payload().next().await {
@@ -23,12 +24,15 @@ async fn main() -> io::Result<()> {
 
                     log::info!("request body: {:?}", body);
 
-                    Ok::<_, Error>(
-                        Response::build(StatusCode::OK)
-                            .insert_header(("x-head", HeaderValue::from_static("dummy value!")))
-                            .body(body),
-                    )
+                    let res = Response::build(StatusCode::OK)
+                        .insert_header(("x-head", HeaderValue::from_static("dummy value!")))
+                        .body(body);
+
+                    res.req_data_mut().insert(5usize);
+
+                    Ok::<_, Error>(res)
                 })
+                // No TLS
                 .tcp()
         })?
         .run()
diff --git a/actix-http/examples/echo2.rs b/actix-http/examples/echo2.rs
index e3b915e05..605572d8b 100644
--- a/actix-http/examples/echo2.rs
+++ b/actix-http/examples/echo2.rs
@@ -1,32 +1,34 @@
 use std::io;
 
 use actix_http::{
-    body::MessageBody, header::HeaderValue, Error, HttpService, Request, Response, StatusCode,
+    body::{BodyStream, MessageBody},
+    header, Error, HttpMessage, HttpService, Request, Response, StatusCode,
 };
-use actix_server::Server;
-use bytes::BytesMut;
-use futures_util::StreamExt as _;
 
 async fn handle_request(mut req: Request) -> Result<Response<impl MessageBody>, Error> {
-    let mut body = BytesMut::new();
-    while let Some(item) = req.payload().next().await {
-        body.extend_from_slice(&item?)
+    let mut res = Response::build(StatusCode::OK);
+
+    if let Some(ct) = req.headers().get(header::CONTENT_TYPE) {
+        res.insert_header((header::CONTENT_TYPE, ct));
     }
 
-    log::info!("request body: {:?}", body);
+    // echo request payload stream as (chunked) response body
+    let res = res.message_body(BodyStream::new(req.payload().take()))?;
 
-    Ok(Response::build(StatusCode::OK)
-        .insert_header(("x-head", HeaderValue::from_static("dummy value!")))
-        .body(body))
+    Ok(res)
 }
 
 #[actix_rt::main]
 async fn main() -> io::Result<()> {
     env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
 
-    Server::build()
+    actix_server::Server::build()
         .bind("echo", ("127.0.0.1", 8080), || {
-            HttpService::build().finish(handle_request).tcp()
+            HttpService::build()
+                // handles HTTP/1.1 only
+                .h1(handle_request)
+                // No TLS
+                .tcp()
         })?
         .run()
         .await
diff --git a/actix-http/src/message.rs b/actix-http/src/message.rs
index ecd08fbb3..5616a4762 100644
--- a/actix-http/src/message.rs
+++ b/actix-http/src/message.rs
@@ -5,13 +5,13 @@ use bitflags::bitflags;
 /// Represents various types of connection
 #[derive(Copy, Clone, PartialEq, Debug)]
 pub enum ConnectionType {
-    /// Close connection after response
+    /// Close connection after response.
     Close,
 
-    /// Keep connection alive after response
+    /// Keep connection alive after response.
     KeepAlive,
 
-    /// Connection is upgraded to different type
+    /// Connection is upgraded to different type.
     Upgrade,
 }
 
@@ -69,8 +69,8 @@ impl<T: Head> Drop for Message<T> {
     }
 }
 
+/// Generic `Head` object pool.
 #[doc(hidden)]
-/// Request's objects pool
 pub struct MessagePool<T: Head>(RefCell<Vec<Rc<T>>>);
 
 impl<T: Head> MessagePool<T> {
diff --git a/actix-http/src/requests/head.rs b/actix-http/src/requests/head.rs
index 524075b61..06fd0429e 100644
--- a/actix-http/src/requests/head.rs
+++ b/actix-http/src/requests/head.rs
@@ -142,8 +142,8 @@ impl RequestHead {
     }
 }
 
-#[derive(Debug)]
 #[allow(clippy::large_enum_variant)]
+#[derive(Debug)]
 pub enum RequestHeadType {
     Owned(RequestHead),
     Rc(Rc<RequestHead>, Option<HeaderMap>),
diff --git a/actix-http/src/responses/builder.rs b/actix-http/src/responses/builder.rs
index 5854863de..4a67423b1 100644
--- a/actix-http/src/responses/builder.rs
+++ b/actix-http/src/responses/builder.rs
@@ -1,9 +1,6 @@
 //! HTTP response builder.
 
-use std::{
-    cell::{Ref, RefMut},
-    fmt, str,
-};
+use std::{cell::RefCell, fmt, str};
 
 use crate::{
     body::{EitherBody, MessageBody},
@@ -202,20 +199,6 @@ impl ResponseBuilder {
         self
     }
 
-    /// Responses extensions
-    #[inline]
-    pub fn extensions(&self) -> Ref<'_, Extensions> {
-        let head = self.head.as_ref().expect("cannot reuse response builder");
-        head.extensions.borrow()
-    }
-
-    /// Mutable reference to a the response's extensions
-    #[inline]
-    pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
-        let head = self.head.as_ref().expect("cannot reuse response builder");
-        head.extensions.borrow_mut()
-    }
-
     /// Generate response with a wrapped body.
     ///
     /// This `ResponseBuilder` will be left in a useless state.
@@ -238,7 +221,12 @@ impl ResponseBuilder {
         }
 
         let head = self.head.take().expect("cannot reuse response builder");
-        Ok(Response { head, body })
+
+        Ok(Response {
+            head,
+            body,
+            extensions: RefCell::new(Extensions::new()),
+        })
     }
 
     /// Generate response with an empty body.
diff --git a/actix-http/src/responses/head.rs b/actix-http/src/responses/head.rs
index d11ba8fde..91e96a928 100644
--- a/actix-http/src/responses/head.rs
+++ b/actix-http/src/responses/head.rs
@@ -1,25 +1,19 @@
 //! Response head type and caching pool.
 
-use std::{
-    cell::{Ref, RefCell, RefMut},
-    ops,
-};
+use std::{cell::RefCell, ops};
 
-use crate::{
-    header::HeaderMap, message::Flags, ConnectionType, Extensions, StatusCode, Version,
-};
+use crate::{header::HeaderMap, message::Flags, ConnectionType, StatusCode, Version};
 
 thread_local! {
     static RESPONSE_POOL: BoxedResponsePool = BoxedResponsePool::create();
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct ResponseHead {
     pub version: Version,
     pub status: StatusCode,
     pub headers: HeaderMap,
     pub reason: Option<&'static str>,
-    pub(crate) extensions: RefCell<Extensions>,
     pub(crate) flags: Flags,
 }
 
@@ -33,18 +27,17 @@ impl ResponseHead {
             headers: HeaderMap::with_capacity(12),
             reason: None,
             flags: Flags::empty(),
-            extensions: RefCell::new(Extensions::new()),
         }
     }
 
-    #[inline]
     /// Read the message headers.
+    #[inline]
     pub fn headers(&self) -> &HeaderMap {
         &self.headers
     }
 
-    #[inline]
     /// Mutable reference to the message headers.
+    #[inline]
     pub fn headers_mut(&mut self) -> &mut HeaderMap {
         &mut self.headers
     }
@@ -61,20 +54,8 @@ impl ResponseHead {
         }
     }
 
-    /// Message extensions
-    #[inline]
-    pub fn extensions(&self) -> Ref<'_, Extensions> {
-        self.extensions.borrow()
-    }
-
-    /// Mutable reference to a the message's extensions
-    #[inline]
-    pub fn extensions_mut(&self) -> RefMut<'_, Extensions> {
-        self.extensions.borrow_mut()
-    }
-
-    #[inline]
     /// Set connection type of the message
+    #[inline]
     pub fn set_connection_type(&mut self, ctype: ConnectionType) {
         match ctype {
             ConnectionType::Close => self.flags.insert(Flags::CLOSE),
@@ -133,14 +114,14 @@ impl ResponseHead {
         }
     }
 
-    #[inline]
     /// Get response body chunking state
+    #[inline]
     pub fn chunked(&self) -> bool {
         !self.flags.contains(Flags::NO_CHUNKING)
     }
 
-    #[inline]
     /// Set no chunking for payload
+    #[inline]
     pub fn no_chunking(&mut self, val: bool) {
         if val {
             self.flags.insert(Flags::NO_CHUNKING);
@@ -183,7 +164,7 @@ impl Drop for BoxedResponseHead {
     }
 }
 
-/// Request's objects pool
+/// Response head object pool.
 #[doc(hidden)]
 pub struct BoxedResponsePool(#[allow(clippy::vec_box)] RefCell<Vec<Box<ResponseHead>>>);
 
@@ -192,7 +173,7 @@ impl BoxedResponsePool {
         BoxedResponsePool(RefCell::new(Vec::with_capacity(128)))
     }
 
-    /// Get message from the pool
+    /// Get message from the pool.
     #[inline]
     fn get_message(&self, status: StatusCode) -> BoxedResponseHead {
         if let Some(mut head) = self.0.borrow_mut().pop() {
@@ -208,12 +189,12 @@ impl BoxedResponsePool {
         }
     }
 
-    /// Release request instance
+    /// Release request instance.
     #[inline]
-    fn release(&self, mut msg: Box<ResponseHead>) {
+    fn release(&self, msg: Box<ResponseHead>) {
         let pool = &mut self.0.borrow_mut();
+
         if pool.len() < 128 {
-            msg.extensions.get_mut().clear();
             pool.push(msg);
         }
     }
diff --git a/actix-http/src/responses/response.rs b/actix-http/src/responses/response.rs
index ec9157afb..08dddb90a 100644
--- a/actix-http/src/responses/response.rs
+++ b/actix-http/src/responses/response.rs
@@ -1,7 +1,7 @@
 //! HTTP response.
 
 use std::{
-    cell::{Ref, RefMut},
+    cell::{Ref, RefCell, RefMut},
     fmt, str,
 };
 
@@ -9,7 +9,7 @@ use bytes::{Bytes, BytesMut};
 use bytestring::ByteString;
 
 use crate::{
-    body::{BoxBody, MessageBody},
+    body::{BoxBody, EitherBody, MessageBody},
     header::{self, HeaderMap, TryIntoHeaderValue},
     responses::BoxedResponseHead,
     Error, Extensions, ResponseBuilder, ResponseHead, StatusCode,
@@ -19,6 +19,7 @@ use crate::{
 pub struct Response<B> {
     pub(crate) head: BoxedResponseHead,
     pub(crate) body: B,
+    pub(crate) extensions: RefCell<Extensions>,
 }
 
 impl Response<BoxBody> {
@@ -28,6 +29,7 @@ impl Response<BoxBody> {
         Response {
             head: BoxedResponseHead::new(status),
             body: BoxBody::new(()),
+            extensions: RefCell::new(Extensions::new()),
         }
     }
 
@@ -74,6 +76,7 @@ impl<B> Response<B> {
         Response {
             head: BoxedResponseHead::new(status),
             body,
+            extensions: RefCell::new(Extensions::new()),
         }
     }
 
@@ -120,6 +123,7 @@ impl<B> Response<B> {
     }
 
     /// Returns true if keep-alive is enabled.
+    #[inline]
     pub fn keep_alive(&self) -> bool {
         self.head.keep_alive()
     }
@@ -127,13 +131,13 @@ impl<B> Response<B> {
     /// Returns a reference to the extensions of this response.
     #[inline]
     pub fn extensions(&self) -> Ref<'_, Extensions> {
-        self.head.extensions.borrow()
+        self.extensions.borrow()
     }
 
     /// Returns a mutable reference to the extensions of this response.
     #[inline]
-    pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
-        self.head.extensions.borrow_mut()
+    pub fn extensions_mut(&self) -> RefMut<'_, Extensions> {
+        self.extensions.borrow_mut()
     }
 
     /// Returns a reference to the body of this response.
@@ -143,24 +147,29 @@ impl<B> Response<B> {
     }
 
     /// Sets new body.
+    #[inline]
     pub fn set_body<B2>(self, body: B2) -> Response<B2> {
         Response {
             head: self.head,
             body,
+            extensions: self.extensions,
         }
     }
 
     /// Drops body and returns new response.
+    #[inline]
     pub fn drop_body(self) -> Response<()> {
         self.set_body(())
     }
 
     /// Sets new body, returning new response and previous body value.
+    #[inline]
     pub(crate) fn replace_body<B2>(self, body: B2) -> (Response<B2>, B) {
         (
             Response {
                 head: self.head,
                 body,
+                extensions: self.extensions,
             },
             self.body,
         )
@@ -171,11 +180,13 @@ impl<B> Response<B> {
     /// # Implementation Notes
     /// Due to internal performance optimizations, the first element of the returned tuple is a
     /// `Response` as well but only contains the head of the response this was called on.
+    #[inline]
     pub fn into_parts(self) -> (Response<()>, B) {
         self.replace_body(())
     }
 
     /// Returns new response with mapped body.
+    #[inline]
     pub fn map_body<F, B2>(mut self, f: F) -> Response<B2>
     where
         F: FnOnce(&mut ResponseHead, B) -> B2,
@@ -185,6 +196,7 @@ impl<B> Response<B> {
         Response {
             head: self.head,
             body,
+            extensions: self.extensions,
         }
     }
 
@@ -197,6 +209,7 @@ impl<B> Response<B> {
     }
 
     /// Returns body, consuming this response.
+    #[inline]
     pub fn into_body(self) -> B {
         self.body
     }
@@ -239,9 +252,9 @@ impl<I: Into<Response<BoxBody>>, E: Into<Error>> From<Result<I, E>> for Response
     }
 }
 
-impl From<ResponseBuilder> for Response<BoxBody> {
+impl From<ResponseBuilder> for Response<EitherBody<()>> {
     fn from(mut builder: ResponseBuilder) -> Self {
-        builder.finish().map_into_boxed_body()
+        builder.finish()
     }
 }
 
diff --git a/awc/src/responses/response.rs b/awc/src/responses/response.rs
index 0197265f1..017c59744 100644
--- a/awc/src/responses/response.rs
+++ b/awc/src/responses/response.rs
@@ -1,5 +1,5 @@
 use std::{
-    cell::{Ref, RefMut},
+    cell::{Ref, RefCell, RefMut},
     fmt, mem,
     pin::Pin,
     task::{Context, Poll},
@@ -28,6 +28,8 @@ pin_project! {
         #[pin]
         pub(crate) payload: Payload<S>,
         pub(crate) timeout: ResponseTimeout,
+        pub(crate) extensions: RefCell<Extensions>,
+
     }
 }
 
@@ -38,6 +40,7 @@ impl<S> ClientResponse<S> {
             head,
             payload,
             timeout: ResponseTimeout::default(),
+            extensions: RefCell::new(Extensions::new()),
         }
     }
 
@@ -75,6 +78,7 @@ impl<S> ClientResponse<S> {
             payload,
             head: self.head,
             timeout: self.timeout,
+            extensions: self.extensions,
         }
     }
 
@@ -101,6 +105,7 @@ impl<S> ClientResponse<S> {
             payload: self.payload,
             head: self.head,
             timeout,
+            extensions: self.extensions,
         }
     }
 
@@ -112,6 +117,18 @@ impl<S> ClientResponse<S> {
         self
     }
 
+    /// Returns a reference to the extensions of this response.
+    #[inline]
+    pub fn req_data(&self) -> Ref<'_, Extensions> {
+        self.extensions.borrow()
+    }
+
+    /// Returns a mutable reference to the extensions of this response.
+    #[inline]
+    pub fn req_data_mut(&self) -> RefMut<'_, Extensions> {
+        self.extensions.borrow_mut()
+    }
+
     /// Load request cookies.
     #[cfg(feature = "cookies")]
     pub fn cookies(&self) -> Result<Ref<'_, Vec<Cookie<'static>>>, CookieParseError> {
@@ -224,11 +241,11 @@ impl<S> HttpMessage for ClientResponse<S> {
     }
 
     fn extensions(&self) -> Ref<'_, Extensions> {
-        self.head.extensions()
+        self.req_data()
     }
 
     fn extensions_mut(&self) -> RefMut<'_, Extensions> {
-        self.head.extensions_mut()
+        self.req_data_mut()
     }
 }
 
diff --git a/src/request.rs b/src/request.rs
index e876c3b4d..2eed75a36 100644
--- a/src/request.rs
+++ b/src/request.rs
@@ -5,10 +5,7 @@ use std::{
     str,
 };
 
-use actix_http::{
-    header::HeaderMap, Extensions, HttpMessage, Message, Method, Payload, RequestHead, Uri,
-    Version,
-};
+use actix_http::{Message, RequestHead};
 use actix_router::{Path, Url};
 use actix_utils::future::{ok, Ready};
 #[cfg(feature = "cookies")]
@@ -16,8 +13,14 @@ use cookie::{Cookie, ParseError as CookieParseError};
 use smallvec::SmallVec;
 
 use crate::{
-    app_service::AppInitServiceState, config::AppConfig, error::UrlGenerationError,
-    info::ConnectionInfo, rmap::ResourceMap, Error, FromRequest,
+    app_service::AppInitServiceState,
+    config::AppConfig,
+    dev::{Extensions, Payload},
+    error::UrlGenerationError,
+    http::{header::HeaderMap, Method, Uri, Version},
+    info::ConnectionInfo,
+    rmap::ResourceMap,
+    Error, FromRequest, HttpMessage,
 };
 
 #[cfg(feature = "cookies")]
diff --git a/src/response/builder.rs b/src/response/builder.rs
index bdb0aaa12..740c890f6 100644
--- a/src/response/builder.rs
+++ b/src/response/builder.rs
@@ -1,5 +1,4 @@
 use std::{
-    cell::{Ref, RefMut},
     convert::TryInto,
     future::Future,
     pin::Pin,
@@ -7,21 +6,16 @@ use std::{
 };
 
 use actix_http::{
-    body::{BodyStream, BoxBody, MessageBody},
     error::HttpError,
     header::{self, HeaderName, TryIntoHeaderPair, TryIntoHeaderValue},
-    ConnectionType, Extensions, Response, ResponseHead, StatusCode,
+    ConnectionType, Response, ResponseHead, StatusCode,
 };
 use bytes::Bytes;
 use futures_core::Stream;
 use serde::Serialize;
 
-#[cfg(feature = "cookies")]
-use actix_http::header::HeaderValue;
-#[cfg(feature = "cookies")]
-use cookie::{Cookie, CookieJar};
-
 use crate::{
+    body::{BodyStream, BoxBody, MessageBody},
     error::{Error, JsonPayloadError},
     BoxError, HttpRequest, HttpResponse, Responder,
 };
@@ -33,7 +27,7 @@ pub struct HttpResponseBuilder {
     res: Option<Response<BoxBody>>,
     err: Option<HttpError>,
     #[cfg(feature = "cookies")]
-    cookies: Option<CookieJar>,
+    cookies: Option<cookie::CookieJar>,
 }
 
 impl HttpResponseBuilder {
@@ -242,9 +236,9 @@ impl HttpResponseBuilder {
     ///     .finish();
     /// ```
     #[cfg(feature = "cookies")]
-    pub fn cookie<'c>(&mut self, cookie: Cookie<'c>) -> &mut Self {
+    pub fn cookie<'c>(&mut self, cookie: cookie::Cookie<'c>) -> &mut Self {
         if self.cookies.is_none() {
-            let mut jar = CookieJar::new();
+            let mut jar = cookie::CookieJar::new();
             jar.add(cookie.into_owned());
             self.cookies = Some(jar)
         } else {
@@ -271,9 +265,9 @@ impl HttpResponseBuilder {
     /// }
     /// ```
     #[cfg(feature = "cookies")]
-    pub fn del_cookie(&mut self, cookie: &Cookie<'_>) -> &mut Self {
+    pub fn del_cookie(&mut self, cookie: &cookie::Cookie<'_>) -> &mut Self {
         if self.cookies.is_none() {
-            self.cookies = Some(CookieJar::new())
+            self.cookies = Some(cookie::CookieJar::new())
         }
         let jar = self.cookies.as_mut().unwrap();
         let cookie = cookie.clone().into_owned();
@@ -282,22 +276,22 @@ impl HttpResponseBuilder {
         self
     }
 
-    /// Responses extensions
-    #[inline]
-    pub fn extensions(&self) -> Ref<'_, Extensions> {
-        self.res
-            .as_ref()
-            .expect("cannot reuse response builder")
-            .extensions()
-    }
+    // /// Responses extensions
+    // #[inline]
+    // pub fn extensions(&self) -> Ref<'_, Extensions> {
+    //     self.res
+    //         .as_ref()
+    //         .expect("cannot reuse response builder")
+    //         .extensions()
+    // }
 
-    /// Mutable reference to a the response's extensions
-    pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
-        self.res
-            .as_mut()
-            .expect("cannot reuse response builder")
-            .extensions_mut()
-    }
+    // /// Mutable reference to a the response's extensions
+    // pub fn extensions_mut(&mut self) -> RefMut<'_, Extensions> {
+    //     self.res
+    //         .as_mut()
+    //         .expect("cannot reuse response builder")
+    //         .extensions_mut()
+    // }
 
     /// Set a body and build the `HttpResponse`.
     ///
@@ -332,7 +326,7 @@ impl HttpResponseBuilder {
         #[cfg(feature = "cookies")]
         if let Some(ref jar) = self.cookies {
             for cookie in jar.delta() {
-                match HeaderValue::from_str(&cookie.to_string()) {
+                match actix_http::header::HeaderValue::from_str(&cookie.to_string()) {
                     Ok(val) => res.headers_mut().append(header::SET_COOKIE, val),
                     Err(err) => return Err(err.into()),
                 };
@@ -435,10 +429,9 @@ impl Responder for HttpResponseBuilder {
 
 #[cfg(test)]
 mod tests {
-    use actix_http::body;
-
     use super::*;
     use crate::{
+        body,
         http::{
             header::{self, HeaderValue, CONTENT_TYPE},
             StatusCode,
diff --git a/src/service.rs b/src/service.rs
index f15cbfc9f..4ca2b518a 100644
--- a/src/service.rs
+++ b/src/service.rs
@@ -103,6 +103,7 @@ impl ServiceRequest {
     /// Construct request from request.
     ///
     /// The returned `ServiceRequest` would have no payload.
+    #[inline]
     pub fn from_request(req: HttpRequest) -> Self {
         ServiceRequest {
             req,
@@ -546,14 +547,12 @@ impl WebService {
     ///     Ok(req.into_response(HttpResponse::Ok().finish()))
     /// }
     ///
-    /// fn main() {
-    ///     let app = App::new()
-    ///         .service(
-    ///             web::service("/app")
-    ///                 .guard(guard::Header("content-type", "text/plain"))
-    ///                 .finish(index)
-    ///         );
-    /// }
+    /// let app = App::new()
+    ///     .service(
+    ///         web::service("/app")
+    ///             .guard(guard::Header("content-type", "text/plain"))
+    ///             .finish(index)
+    ///     );
     /// ```
     pub fn guard<G: Guard + 'static>(mut self, guard: G) -> Self {
         self.guards.push(Box::new(guard));