diff --git a/src/body.rs b/src/body.rs
index 3b4e0113..a44bc603 100644
--- a/src/body.rs
+++ b/src/body.rs
@@ -1,22 +1,19 @@
-use std::mem;
-use std::sync::Arc;
+use std::marker::PhantomData;
+use std::{fmt, mem};
 
 use bytes::{Bytes, BytesMut};
 use futures::{Async, Poll, Stream};
 
 use error::{Error, PayloadError};
 
-/// Type represent streaming body
-pub type BodyStream = Box<dyn Stream<Item = Bytes, Error = Error>>;
-
 /// Type represent streaming payload
 pub type PayloadStream = Box<dyn Stream<Item = Bytes, Error = PayloadError>>;
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 /// Different type of body
 pub enum BodyLength {
     None,
-    Zero,
+    Empty,
     Sized(usize),
     Sized64(u64),
     Chunked,
@@ -32,7 +29,7 @@ pub trait MessageBody {
 
 impl MessageBody for () {
     fn length(&self) -> BodyLength {
-        BodyLength::Zero
+        BodyLength::Empty
     }
 
     fn poll_next(&mut self) -> Poll<Option<Bytes>, Error> {
@@ -40,150 +37,129 @@ impl MessageBody for () {
     }
 }
 
-/// Represents various types of binary body.
-/// `Content-Length` header is set to length of the body.
-#[derive(Debug, PartialEq)]
-pub enum Binary {
-    /// Bytes body
+/// Represents various types of http message body.
+pub enum Body {
+    /// Empty response. `Content-Length` header is not set.
+    None,
+    /// Zero sized response body. `Content-Length` header is set to `0`.
+    Empty,
+    /// Specific response body.
     Bytes(Bytes),
-    /// Static slice
-    Slice(&'static [u8]),
-    /// Shared string body
-    #[doc(hidden)]
-    SharedString(Arc<String>),
-    /// Shared vec body
-    SharedVec(Arc<Vec<u8>>),
+    /// Generic message body.
+    Message(Box<dyn MessageBody>),
 }
 
-impl Binary {
-    #[inline]
-    /// Returns `true` if body is empty
-    pub fn is_empty(&self) -> bool {
-        self.len() == 0
+impl Body {
+    /// Create body from slice (copy)
+    pub fn from_slice(s: &[u8]) -> Body {
+        Body::Bytes(Bytes::from(s))
     }
 
-    #[inline]
-    /// Length of body in bytes
-    pub fn len(&self) -> usize {
-        match *self {
-            Binary::Bytes(ref bytes) => bytes.len(),
-            Binary::Slice(slice) => slice.len(),
-            Binary::SharedString(ref s) => s.len(),
-            Binary::SharedVec(ref s) => s.len(),
-        }
-    }
-
-    /// Create binary body from slice
-    pub fn from_slice(s: &[u8]) -> Binary {
-        Binary::Bytes(Bytes::from(s))
-    }
-
-    /// Convert Binary to a Bytes instance
-    pub fn take(&mut self) -> Bytes {
-        mem::replace(self, Binary::Slice(b"")).into()
+    /// Create body from generic message body.
+    pub fn from_message<B: MessageBody + 'static>(body: B) -> Body {
+        Body::Message(Box::new(body))
     }
 }
 
-impl Clone for Binary {
-    fn clone(&self) -> Binary {
-        match *self {
-            Binary::Bytes(ref bytes) => Binary::Bytes(bytes.clone()),
-            Binary::Slice(slice) => Binary::Bytes(Bytes::from(slice)),
-            Binary::SharedString(ref s) => Binary::SharedString(s.clone()),
-            Binary::SharedVec(ref s) => Binary::SharedVec(s.clone()),
-        }
-    }
-}
-
-impl Into<Bytes> for Binary {
-    fn into(self) -> Bytes {
+impl MessageBody for Body {
+    fn length(&self) -> BodyLength {
         match self {
-            Binary::Bytes(bytes) => bytes,
-            Binary::Slice(slice) => Bytes::from(slice),
-            Binary::SharedString(s) => Bytes::from(s.as_str()),
-            Binary::SharedVec(s) => Bytes::from(AsRef::<[u8]>::as_ref(s.as_ref())),
+            Body::None => BodyLength::None,
+            Body::Empty => BodyLength::Empty,
+            Body::Bytes(ref bin) => BodyLength::Sized(bin.len()),
+            Body::Message(ref body) => body.length(),
+        }
+    }
+
+    fn poll_next(&mut self) -> Poll<Option<Bytes>, Error> {
+        match self {
+            Body::None => Ok(Async::Ready(None)),
+            Body::Empty => Ok(Async::Ready(None)),
+            Body::Bytes(ref mut bin) => {
+                if bin.len() == 0 {
+                    Ok(Async::Ready(None))
+                } else {
+                    Ok(Async::Ready(Some(bin.slice_to(bin.len()))))
+                }
+            }
+            Body::Message(ref mut body) => body.poll_next(),
         }
     }
 }
 
-impl From<&'static str> for Binary {
-    fn from(s: &'static str) -> Binary {
-        Binary::Slice(s.as_ref())
-    }
-}
-
-impl From<&'static [u8]> for Binary {
-    fn from(s: &'static [u8]) -> Binary {
-        Binary::Slice(s)
-    }
-}
-
-impl From<Vec<u8>> for Binary {
-    fn from(vec: Vec<u8>) -> Binary {
-        Binary::Bytes(Bytes::from(vec))
-    }
-}
-
-impl From<String> for Binary {
-    fn from(s: String) -> Binary {
-        Binary::Bytes(Bytes::from(s))
-    }
-}
-
-impl<'a> From<&'a String> for Binary {
-    fn from(s: &'a String) -> Binary {
-        Binary::Bytes(Bytes::from(AsRef::<[u8]>::as_ref(&s)))
-    }
-}
-
-impl From<Bytes> for Binary {
-    fn from(s: Bytes) -> Binary {
-        Binary::Bytes(s)
-    }
-}
-
-impl From<BytesMut> for Binary {
-    fn from(s: BytesMut) -> Binary {
-        Binary::Bytes(s.freeze())
-    }
-}
-
-impl From<Arc<String>> for Binary {
-    fn from(body: Arc<String>) -> Binary {
-        Binary::SharedString(body)
-    }
-}
-
-impl<'a> From<&'a Arc<String>> for Binary {
-    fn from(body: &'a Arc<String>) -> Binary {
-        Binary::SharedString(Arc::clone(body))
-    }
-}
-
-impl From<Arc<Vec<u8>>> for Binary {
-    fn from(body: Arc<Vec<u8>>) -> Binary {
-        Binary::SharedVec(body)
-    }
-}
-
-impl<'a> From<&'a Arc<Vec<u8>>> for Binary {
-    fn from(body: &'a Arc<Vec<u8>>) -> Binary {
-        Binary::SharedVec(Arc::clone(body))
-    }
-}
-
-impl AsRef<[u8]> for Binary {
-    #[inline]
-    fn as_ref(&self) -> &[u8] {
+impl PartialEq for Body {
+    fn eq(&self, other: &Body) -> bool {
         match *self {
-            Binary::Bytes(ref bytes) => bytes.as_ref(),
-            Binary::Slice(slice) => slice,
-            Binary::SharedString(ref s) => s.as_bytes(),
-            Binary::SharedVec(ref s) => s.as_ref().as_ref(),
+            Body::None => match *other {
+                Body::None => true,
+                _ => false,
+            },
+            Body::Empty => match *other {
+                Body::Empty => true,
+                _ => false,
+            },
+            Body::Bytes(ref b) => match *other {
+                Body::Bytes(ref b2) => b == b2,
+                _ => false,
+            },
+            Body::Message(_) => false,
         }
     }
 }
 
+impl fmt::Debug for Body {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Body::None => write!(f, "Body::None"),
+            Body::Empty => write!(f, "Body::Zero"),
+            Body::Bytes(ref b) => write!(f, "Body::Bytes({:?})", b),
+            Body::Message(_) => write!(f, "Body::Message(_)"),
+        }
+    }
+}
+
+impl From<&'static str> for Body {
+    fn from(s: &'static str) -> Body {
+        Body::Bytes(Bytes::from_static(s.as_ref()))
+    }
+}
+
+impl From<&'static [u8]> for Body {
+    fn from(s: &'static [u8]) -> Body {
+        Body::Bytes(Bytes::from_static(s.as_ref()))
+    }
+}
+
+impl From<Vec<u8>> for Body {
+    fn from(vec: Vec<u8>) -> Body {
+        Body::Bytes(Bytes::from(vec))
+    }
+}
+
+impl From<String> for Body {
+    fn from(s: String) -> Body {
+        s.into_bytes().into()
+    }
+}
+
+impl<'a> From<&'a String> for Body {
+    fn from(s: &'a String) -> Body {
+        Body::Bytes(Bytes::from(AsRef::<[u8]>::as_ref(&s)))
+    }
+}
+
+impl From<Bytes> for Body {
+    fn from(s: Bytes) -> Body {
+        Body::Bytes(s)
+    }
+}
+
+impl From<BytesMut> for Body {
+    fn from(s: BytesMut) -> Body {
+        Body::Bytes(s.freeze())
+    }
+}
+
 impl MessageBody for Bytes {
     fn length(&self) -> BodyLength {
         BodyLength::Sized(self.len())
@@ -279,26 +255,62 @@ impl MessageBody for String {
     }
 }
 
-#[doc(hidden)]
-pub struct MessageBodyStream<S> {
+/// Type represent streaming body.
+/// Response does not contain `content-length` header and appropriate transfer encoding is used.
+pub struct BodyStream<S, E> {
     stream: S,
+    _t: PhantomData<E>,
 }
 
-impl<S> MessageBodyStream<S>
+impl<S, E> BodyStream<S, E>
 where
-    S: Stream<Item = Bytes, Error = Error>,
+    S: Stream<Item = Bytes, Error = E>,
+    E: Into<Error>,
 {
     pub fn new(stream: S) -> Self {
-        MessageBodyStream { stream }
+        BodyStream {
+            stream,
+            _t: PhantomData,
+        }
     }
 }
 
-impl<S> MessageBody for MessageBodyStream<S>
+impl<S, E> MessageBody for BodyStream<S, E>
+where
+    S: Stream<Item = Bytes, Error = E>,
+    E: Into<Error>,
+{
+    fn length(&self) -> BodyLength {
+        BodyLength::Chunked
+    }
+
+    fn poll_next(&mut self) -> Poll<Option<Bytes>, Error> {
+        self.stream.poll().map_err(|e| e.into())
+    }
+}
+
+/// Type represent streaming body. This body implementation should be used
+/// if total size of stream is known. Data get sent as is without using transfer encoding.
+pub struct SizedStream<S> {
+    size: usize,
+    stream: S,
+}
+
+impl<S> SizedStream<S>
+where
+    S: Stream<Item = Bytes, Error = Error>,
+{
+    pub fn new(size: usize, stream: S) -> Self {
+        SizedStream { size, stream }
+    }
+}
+
+impl<S> MessageBody for SizedStream<S>
 where
     S: Stream<Item = Bytes, Error = Error>,
 {
     fn length(&self) -> BodyLength {
-        BodyLength::Chunked
+        BodyLength::Sized(self.size)
     }
 
     fn poll_next(&mut self) -> Poll<Option<Bytes>, Error> {
@@ -310,78 +322,61 @@ where
 mod tests {
     use super::*;
 
-    #[test]
-    fn test_is_empty() {
-        assert_eq!(Binary::from("").is_empty(), true);
-        assert_eq!(Binary::from("test").is_empty(), false);
+    impl Body {
+        pub(crate) fn get_ref(&self) -> &[u8] {
+            match *self {
+                Body::Bytes(ref bin) => &bin,
+                _ => panic!(),
+            }
+        }
     }
 
     #[test]
     fn test_static_str() {
-        assert_eq!(Binary::from("test").len(), 4);
-        assert_eq!(Binary::from("test").as_ref(), b"test");
+        assert_eq!(Body::from("").length(), BodyLength::Sized(0));
+        assert_eq!(Body::from("test").length(), BodyLength::Sized(4));
+        assert_eq!(Body::from("test").get_ref(), b"test");
     }
 
     #[test]
     fn test_static_bytes() {
-        assert_eq!(Binary::from(b"test".as_ref()).len(), 4);
-        assert_eq!(Binary::from(b"test".as_ref()).as_ref(), b"test");
-        assert_eq!(Binary::from_slice(b"test".as_ref()).len(), 4);
-        assert_eq!(Binary::from_slice(b"test".as_ref()).as_ref(), b"test");
+        assert_eq!(Body::from(b"test".as_ref()).length(), BodyLength::Sized(4));
+        assert_eq!(Body::from(b"test".as_ref()).get_ref(), b"test");
+        assert_eq!(
+            Body::from_slice(b"test".as_ref()).length(),
+            BodyLength::Sized(4)
+        );
+        assert_eq!(Body::from_slice(b"test".as_ref()).get_ref(), b"test");
     }
 
     #[test]
     fn test_vec() {
-        assert_eq!(Binary::from(Vec::from("test")).len(), 4);
-        assert_eq!(Binary::from(Vec::from("test")).as_ref(), b"test");
+        assert_eq!(Body::from(Vec::from("test")).length(), BodyLength::Sized(4));
+        assert_eq!(Body::from(Vec::from("test")).get_ref(), b"test");
     }
 
     #[test]
     fn test_bytes() {
-        assert_eq!(Binary::from(Bytes::from("test")).len(), 4);
-        assert_eq!(Binary::from(Bytes::from("test")).as_ref(), b"test");
-    }
-
-    #[test]
-    fn test_arc_string() {
-        let b = Arc::new("test".to_owned());
-        assert_eq!(Binary::from(b.clone()).len(), 4);
-        assert_eq!(Binary::from(b.clone()).as_ref(), b"test");
-        assert_eq!(Binary::from(&b).len(), 4);
-        assert_eq!(Binary::from(&b).as_ref(), b"test");
+        assert_eq!(
+            Body::from(Bytes::from("test")).length(),
+            BodyLength::Sized(4)
+        );
+        assert_eq!(Body::from(Bytes::from("test")).get_ref(), b"test");
     }
 
     #[test]
     fn test_string() {
         let b = "test".to_owned();
-        assert_eq!(Binary::from(b.clone()).len(), 4);
-        assert_eq!(Binary::from(b.clone()).as_ref(), b"test");
-        assert_eq!(Binary::from(&b).len(), 4);
-        assert_eq!(Binary::from(&b).as_ref(), b"test");
-    }
-
-    #[test]
-    fn test_shared_vec() {
-        let b = Arc::new(Vec::from(&b"test"[..]));
-        assert_eq!(Binary::from(b.clone()).len(), 4);
-        assert_eq!(Binary::from(b.clone()).as_ref(), &b"test"[..]);
-        assert_eq!(Binary::from(&b).len(), 4);
-        assert_eq!(Binary::from(&b).as_ref(), &b"test"[..]);
+        assert_eq!(Body::from(b.clone()).length(), BodyLength::Sized(4));
+        assert_eq!(Body::from(b.clone()).get_ref(), b"test");
+        assert_eq!(Body::from(&b).length(), BodyLength::Sized(4));
+        assert_eq!(Body::from(&b).get_ref(), b"test");
     }
 
     #[test]
     fn test_bytes_mut() {
         let b = BytesMut::from("test");
-        assert_eq!(Binary::from(b.clone()).len(), 4);
-        assert_eq!(Binary::from(b).as_ref(), b"test");
-    }
-
-    #[test]
-    fn test_binary_into() {
-        let bytes = Bytes::from_static(b"test");
-        let b: Bytes = Binary::from("test").into();
-        assert_eq!(b, bytes);
-        let b: Bytes = Binary::from(bytes.clone()).into();
-        assert_eq!(b, bytes);
+        assert_eq!(Body::from(b.clone()).length(), BodyLength::Sized(4));
+        assert_eq!(Body::from(b).get_ref(), b"test");
     }
 }
diff --git a/src/client/pipeline.rs b/src/client/pipeline.rs
index 56c22bd2..8be860ae 100644
--- a/src/client/pipeline.rs
+++ b/src/client/pipeline.rs
@@ -36,7 +36,9 @@ where
         .and_then(|framed| framed.send((head, len).into()).from_err())
         // send request body
         .and_then(move |framed| match body.length() {
-            BodyLength::None | BodyLength::Zero => Either::A(ok(framed)),
+            BodyLength::None | BodyLength::Empty | BodyLength::Sized(0) => {
+                Either::A(ok(framed))
+            }
             _ => Either::B(SendBody::new(body, framed)),
         })
         // read response and init read body
diff --git a/src/client/request.rs b/src/client/request.rs
index f0b76ed0..dd418a6f 100644
--- a/src/client/request.rs
+++ b/src/client/request.rs
@@ -9,7 +9,7 @@ use futures::{Future, Stream};
 use percent_encoding::{percent_encode, USERINFO_ENCODE_SET};
 use urlcrate::Url;
 
-use body::{MessageBody, MessageBodyStream};
+use body::{BodyStream, MessageBody};
 use error::Error;
 use header::{self, Header, IntoHeaderValue};
 use http::{
@@ -534,14 +534,15 @@ impl ClientRequestBuilder {
     /// Set an streaming body and generate `ClientRequest`.
     ///
     /// `ClientRequestBuilder` can not be used after this call.
-    pub fn stream<S>(
+    pub fn stream<S, E>(
         &mut self,
         stream: S,
     ) -> Result<ClientRequest<impl MessageBody>, HttpError>
     where
-        S: Stream<Item = Bytes, Error = Error>,
+        S: Stream<Item = Bytes, Error = E>,
+        E: Into<Error> + 'static,
     {
-        self.body(MessageBodyStream::new(stream))
+        self.body(BodyStream::new(stream))
     }
 
     /// Set an empty body and generate `ClientRequest`.
diff --git a/src/error.rs b/src/error.rs
index 1f70396c..2e0c2382 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -20,6 +20,7 @@ use tokio_timer::Error as TimerError;
 // re-exports
 pub use cookie::ParseError as CookieParseError;
 
+use body::Body;
 use response::{Response, ResponseParts};
 
 /// A specialized [`Result`](https://doc.rust-lang.org/std/result/enum.Result.html)
@@ -100,10 +101,10 @@ impl Error {
     }
 
     /// Converts error to a response instance and set error message as response body
-    pub fn response_with_message(self) -> Response<String> {
+    pub fn response_with_message(self) -> Response {
         let message = format!("{}", self);
         let resp: Response = self.into();
-        resp.set_body(message)
+        resp.set_body(Body::from(message))
     }
 }
 
diff --git a/src/h1/client.rs b/src/h1/client.rs
index ace50466..2cb2fb2e 100644
--- a/src/h1/client.rs
+++ b/src/h1/client.rs
@@ -7,7 +7,7 @@ use tokio_codec::{Decoder, Encoder};
 use super::decoder::{MessageDecoder, PayloadDecoder, PayloadItem, PayloadType};
 use super::encoder::RequestEncoder;
 use super::{Message, MessageType};
-use body::{Binary, BodyLength};
+use body::BodyLength;
 use client::ClientResponse;
 use config::ServiceConfig;
 use error::{ParseError, PayloadError};
@@ -167,7 +167,7 @@ impl ClientCodecInner {
                 BodyLength::Chunked => {
                     buffer.extend_from_slice(b"\r\ntransfer-encoding: chunked\r\n")
                 }
-                BodyLength::Zero => {
+                BodyLength::Empty => {
                     len_is_set = false;
                     buffer.extend_from_slice(b"\r\n")
                 }
@@ -183,7 +183,7 @@ impl ClientCodecInner {
                     TRANSFER_ENCODING => continue,
                     CONTENT_LENGTH => match length {
                         BodyLength::None => (),
-                        BodyLength::Zero => len_is_set = true,
+                        BodyLength::Empty => len_is_set = true,
                         _ => continue,
                     },
                     DATE => has_date = true,
diff --git a/src/h1/codec.rs b/src/h1/codec.rs
index 6bc20b18..b4a62a50 100644
--- a/src/h1/codec.rs
+++ b/src/h1/codec.rs
@@ -8,7 +8,7 @@ use tokio_codec::{Decoder, Encoder};
 use super::decoder::{MessageDecoder, PayloadDecoder, PayloadItem, PayloadType};
 use super::encoder::ResponseEncoder;
 use super::{Message, MessageType};
-use body::{Binary, BodyLength};
+use body::BodyLength;
 use config::ServiceConfig;
 use error::ParseError;
 use helpers;
@@ -106,7 +106,7 @@ impl Codec {
 
     fn encode_response(
         &mut self,
-        mut msg: Response,
+        mut msg: Response<()>,
         buffer: &mut BytesMut,
     ) -> io::Result<()> {
         let ka = self.flags.contains(Flags::KEEPALIVE_ENABLED) && msg
@@ -149,7 +149,7 @@ impl Codec {
                 BodyLength::Chunked => {
                     buffer.extend_from_slice(b"\r\ntransfer-encoding: chunked\r\n")
                 }
-                BodyLength::Zero => {
+                BodyLength::Empty => {
                     len_is_set = false;
                     buffer.extend_from_slice(b"\r\n")
                 }
@@ -174,7 +174,7 @@ impl Codec {
                     TRANSFER_ENCODING => continue,
                     CONTENT_LENGTH => match self.te.length {
                         BodyLength::None => (),
-                        BodyLength::Zero => {
+                        BodyLength::Empty => {
                             len_is_set = true;
                         }
                         _ => continue,
@@ -268,7 +268,7 @@ impl Decoder for Codec {
 }
 
 impl Encoder for Codec {
-    type Item = Message<Response>;
+    type Item = Message<Response<()>>;
     type Error = io::Error;
 
     fn encode(
diff --git a/src/h1/dispatcher.rs b/src/h1/dispatcher.rs
index 508962b4..ff9d54e6 100644
--- a/src/h1/dispatcher.rs
+++ b/src/h1/dispatcher.rs
@@ -65,7 +65,7 @@ where
 
 enum DispatcherMessage {
     Item(Request),
-    Error(Response),
+    Error(Response<()>),
 }
 
 enum State<S: Service, B: MessageBody> {
@@ -190,7 +190,7 @@ where
 
     fn send_response<B1: MessageBody>(
         &mut self,
-        message: Response,
+        message: Response<()>,
         body: B1,
     ) -> Result<State<S, B1>, DispatchError<S::Error>> {
         self.framed
@@ -206,7 +206,7 @@ where
             .set(Flags::KEEPALIVE, self.framed.get_codec().keepalive());
         self.flags.remove(Flags::FLUSHED);
         match body.length() {
-            BodyLength::None | BodyLength::Zero => Ok(State::None),
+            BodyLength::None | BodyLength::Empty => Ok(State::None),
             _ => Ok(State::SendPayload(body)),
         }
     }
@@ -351,7 +351,7 @@ where
                                 );
                                 self.flags.insert(Flags::DISCONNECTED);
                                 self.messages.push_back(DispatcherMessage::Error(
-                                    Response::InternalServerError().finish(),
+                                    Response::InternalServerError().finish().drop_body(),
                                 ));
                                 self.error = Some(DispatchError::InternalError);
                                 break;
@@ -364,7 +364,7 @@ where
                                 error!("Internal server error: unexpected eof");
                                 self.flags.insert(Flags::DISCONNECTED);
                                 self.messages.push_back(DispatcherMessage::Error(
-                                    Response::InternalServerError().finish(),
+                                    Response::InternalServerError().finish().drop_body(),
                                 ));
                                 self.error = Some(DispatchError::InternalError);
                                 break;
@@ -389,7 +389,7 @@ where
 
                     // Malformed requests should be responded with 400
                     self.messages.push_back(DispatcherMessage::Error(
-                        Response::BadRequest().finish(),
+                        Response::BadRequest().finish().drop_body(),
                     ));
                     self.flags.insert(Flags::DISCONNECTED);
                     self.error = Some(e.into());
@@ -440,8 +440,10 @@ where
                             // timeout on first request (slow request) return 408
                             trace!("Slow request timeout");
                             self.flags.insert(Flags::STARTED | Flags::DISCONNECTED);
-                            let _ = self
-                                .send_response(Response::RequestTimeout().finish(), ());
+                            let _ = self.send_response(
+                                Response::RequestTimeout().finish().drop_body(),
+                                (),
+                            );
                             self.state = State::None;
                         }
                     } else if let Some(deadline) = self.config.keep_alive_expire() {
diff --git a/src/h1/encoder.rs b/src/h1/encoder.rs
index aee17c1f..fd52d731 100644
--- a/src/h1/encoder.rs
+++ b/src/h1/encoder.rs
@@ -8,7 +8,7 @@ use bytes::{Bytes, BytesMut};
 use http::header::{HeaderValue, ACCEPT_ENCODING, CONTENT_LENGTH};
 use http::{StatusCode, Version};
 
-use body::{Binary, BodyLength};
+use body::BodyLength;
 use header::ContentEncoding;
 use http::Method;
 use message::{RequestHead, ResponseHead};
@@ -52,7 +52,7 @@ impl ResponseEncoder {
     ) {
         self.head = head;
         let transfer = match length {
-            BodyLength::Zero => {
+            BodyLength::Empty => {
                 match resp.status {
                     StatusCode::NO_CONTENT
                     | StatusCode::CONTINUE
diff --git a/src/lib.rs b/src/lib.rs
index 4b43cae4..615f0401 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -109,7 +109,7 @@ extern crate serde_derive;
 #[cfg(feature = "ssl")]
 extern crate openssl;
 
-mod body;
+pub mod body;
 pub mod client;
 mod config;
 mod extensions;
@@ -129,7 +129,7 @@ pub mod h1;
 pub(crate) mod helpers;
 pub mod test;
 pub mod ws;
-pub use body::{Binary, MessageBody};
+pub use body::{Body, MessageBody};
 pub use error::{Error, ResponseError, Result};
 pub use extensions::Extensions;
 pub use httpmessage::HttpMessage;
@@ -150,7 +150,6 @@ pub mod dev {
     //! use actix_http::dev::*;
     //! ```
 
-    pub use body::BodyStream;
     pub use httpmessage::{MessageBody, Readlines, UrlEncoded};
     pub use json::JsonBody;
     pub use payload::{Payload, PayloadBuffer};
diff --git a/src/response.rs b/src/response.rs
index b3e59982..a6f7c81c 100644
--- a/src/response.rs
+++ b/src/response.rs
@@ -12,9 +12,9 @@ use http::{Error as HttpError, HeaderMap, HttpTryFrom, StatusCode, Version};
 use serde::Serialize;
 use serde_json;
 
-use body::{MessageBody, MessageBodyStream};
+use body::{Body, BodyStream, MessageBody};
 use error::Error;
-use header::{ContentEncoding, Header, IntoHeaderValue};
+use header::{Header, IntoHeaderValue};
 use message::{Head, MessageFlags, ResponseHead};
 
 /// max write buffer size 64k
@@ -32,9 +32,9 @@ pub enum ConnectionType {
 }
 
 /// An HTTP Response
-pub struct Response<B: MessageBody = ()>(Box<InnerResponse>, B);
+pub struct Response<B: MessageBody = Body>(Box<InnerResponse>, B);
 
-impl Response<()> {
+impl Response<Body> {
     /// Create http response builder with specific status.
     #[inline]
     pub fn build(status: StatusCode) -> ResponseBuilder {
@@ -50,7 +50,7 @@ impl Response<()> {
     /// Constructs a response
     #[inline]
     pub fn new(status: StatusCode) -> Response {
-        ResponsePool::with_body(status, ())
+        ResponsePool::with_body(status, Body::Empty)
     }
 
     /// Constructs an error response
@@ -242,6 +242,11 @@ impl<B: MessageBody> Response<B> {
         Response(self.0, body)
     }
 
+    /// Drop request's body
+    pub fn drop_body(self) -> Response<()> {
+        Response(self.0, ())
+    }
+
     /// Set a body and return previous body value
     pub fn replace_body<B2: MessageBody>(self, body: B2) -> (Response<B2>, B) {
         (Response(self.0, body), self.1)
@@ -252,7 +257,7 @@ impl<B: MessageBody> Response<B> {
         self.get_ref().response_size
     }
 
-    /// Set content encoding
+    /// Set response size
     pub(crate) fn set_response_size(&mut self, size: u64) {
         self.get_mut().response_size = size;
     }
@@ -266,7 +271,7 @@ impl<B: MessageBody> Response<B> {
     }
 
     pub(crate) fn from_parts(parts: ResponseParts) -> Response {
-        Response(Box::new(InnerResponse::from_parts(parts)), ())
+        Response(Box::new(InnerResponse::from_parts(parts)), Body::Empty)
     }
 }
 
@@ -279,7 +284,6 @@ impl fmt::Debug for Response {
             self.get_ref().head.status,
             self.get_ref().head.reason.unwrap_or("")
         );
-        let _ = writeln!(f, "  encoding: {:?}", self.get_ref().encoding);
         let _ = writeln!(f, "  headers:");
         for (key, val) in self.get_ref().head.headers.iter() {
             let _ = writeln!(f, "    {:?}: {:?}", key, val);
@@ -396,20 +400,6 @@ impl ResponseBuilder {
         self
     }
 
-    /// Set content encoding.
-    ///
-    /// By default `ContentEncoding::Auto` is used, which automatically
-    /// negotiates content encoding based on request's `Accept-Encoding`
-    /// headers. To enforce specific encoding, use specific
-    /// ContentEncoding` value.
-    #[inline]
-    pub fn content_encoding(&mut self, enc: ContentEncoding) -> &mut Self {
-        if let Some(parts) = parts(&mut self.response, &self.err) {
-            parts.encoding = Some(enc);
-        }
-        self
-    }
-
     /// Set connection type
     #[inline]
     #[doc(hidden)]
@@ -558,7 +548,14 @@ impl ResponseBuilder {
     /// Set a body and generate `Response`.
     ///
     /// `ResponseBuilder` can not be used after this call.
-    pub fn body<B: MessageBody>(&mut self, body: B) -> Response<B> {
+    pub fn body<B: Into<Body>>(&mut self, body: B) -> Response {
+        self.message_body(body.into())
+    }
+
+    /// Set a body and generate `Response`.
+    ///
+    /// `ResponseBuilder` can not be used after this call.
+    pub fn message_body<B: MessageBody>(&mut self, body: B) -> Response<B> {
         let mut error = if let Some(e) = self.err.take() {
             Some(Error::from(e))
         } else {
@@ -589,25 +586,25 @@ impl ResponseBuilder {
     /// Set a streaming body and generate `Response`.
     ///
     /// `ResponseBuilder` can not be used after this call.
-    pub fn streaming<S, E>(&mut self, stream: S) -> Response<impl MessageBody>
+    pub fn streaming<S, E>(&mut self, stream: S) -> Response
     where
         S: Stream<Item = Bytes, Error = E> + 'static,
-        E: Into<Error>,
+        E: Into<Error> + 'static,
     {
-        self.body(MessageBodyStream::new(stream.map_err(|e| e.into())))
+        self.body(Body::from_message(BodyStream::new(stream)))
     }
 
     /// Set a json body and generate `Response`
     ///
     /// `ResponseBuilder` can not be used after this call.
-    pub fn json<T: Serialize>(&mut self, value: T) -> Response<String> {
+    pub fn json<T: Serialize>(&mut self, value: T) -> Response {
         self.json2(&value)
     }
 
     /// Set a json body and generate `Response`
     ///
     /// `ResponseBuilder` can not be used after this call.
-    pub fn json2<T: Serialize>(&mut self, value: &T) -> Response<String> {
+    pub fn json2<T: Serialize>(&mut self, value: &T) -> Response {
         match serde_json::to_string(value) {
             Ok(body) => {
                 let contains = if let Some(parts) = parts(&mut self.response, &self.err)
@@ -620,12 +617,9 @@ impl ResponseBuilder {
                     self.header(header::CONTENT_TYPE, "application/json");
                 }
 
-                self.body(body)
-            }
-            Err(e) => {
-                let mut res: Response = Error::from(e).into();
-                res.replace_body(String::new()).0
+                self.body(Body::from(body))
             }
+            Err(e) => Error::from(e).into(),
         }
     }
 
@@ -633,8 +627,8 @@ impl ResponseBuilder {
     /// Set an empty body and generate `Response`
     ///
     /// `ResponseBuilder` can not be used after this call.
-    pub fn finish(&mut self) -> Response<()> {
-        self.body(())
+    pub fn finish(&mut self) -> Response {
+        self.body(Body::Empty)
     }
 
     /// This method construct new `ResponseBuilder`
@@ -675,7 +669,7 @@ impl From<ResponseBuilder> for Response {
     }
 }
 
-impl From<&'static str> for Response<&'static str> {
+impl From<&'static str> for Response {
     fn from(val: &'static str) -> Self {
         Response::Ok()
             .content_type("text/plain; charset=utf-8")
@@ -683,7 +677,7 @@ impl From<&'static str> for Response<&'static str> {
     }
 }
 
-impl From<&'static [u8]> for Response<&'static [u8]> {
+impl From<&'static [u8]> for Response {
     fn from(val: &'static [u8]) -> Self {
         Response::Ok()
             .content_type("application/octet-stream")
@@ -691,7 +685,7 @@ impl From<&'static [u8]> for Response<&'static [u8]> {
     }
 }
 
-impl From<String> for Response<String> {
+impl From<String> for Response {
     fn from(val: String) -> Self {
         Response::Ok()
             .content_type("text/plain; charset=utf-8")
@@ -699,7 +693,15 @@ impl From<String> for Response<String> {
     }
 }
 
-impl From<Bytes> for Response<Bytes> {
+impl<'a> From<&'a String> for Response {
+    fn from(val: &'a String) -> Self {
+        Response::Ok()
+            .content_type("text/plain; charset=utf-8")
+            .body(val)
+    }
+}
+
+impl From<Bytes> for Response {
     fn from(val: Bytes) -> Self {
         Response::Ok()
             .content_type("application/octet-stream")
@@ -707,7 +709,7 @@ impl From<Bytes> for Response<Bytes> {
     }
 }
 
-impl From<BytesMut> for Response<BytesMut> {
+impl From<BytesMut> for Response {
     fn from(val: BytesMut) -> Self {
         Response::Ok()
             .content_type("application/octet-stream")
@@ -717,7 +719,6 @@ impl From<BytesMut> for Response<BytesMut> {
 
 struct InnerResponse {
     head: ResponseHead,
-    encoding: Option<ContentEncoding>,
     connection_type: Option<ConnectionType>,
     write_capacity: usize,
     response_size: u64,
@@ -727,7 +728,6 @@ struct InnerResponse {
 
 pub(crate) struct ResponseParts {
     head: ResponseHead,
-    encoding: Option<ContentEncoding>,
     connection_type: Option<ConnectionType>,
     error: Option<Error>,
 }
@@ -744,7 +744,6 @@ impl InnerResponse {
                 flags: MessageFlags::empty(),
             },
             pool,
-            encoding: None,
             connection_type: None,
             response_size: 0,
             write_capacity: MAX_WRITE_BUFFER_SIZE,
@@ -756,7 +755,6 @@ impl InnerResponse {
     fn into_parts(self) -> ResponseParts {
         ResponseParts {
             head: self.head,
-            encoding: self.encoding,
             connection_type: self.connection_type,
             error: self.error,
         }
@@ -765,7 +763,6 @@ impl InnerResponse {
     fn from_parts(parts: ResponseParts) -> InnerResponse {
         InnerResponse {
             head: parts.head,
-            encoding: parts.encoding,
             connection_type: parts.connection_type,
             response_size: 0,
             write_capacity: MAX_WRITE_BUFFER_SIZE,
@@ -841,7 +838,6 @@ impl ResponsePool {
         let mut p = inner.pool.0.borrow_mut();
         if p.len() < 128 {
             inner.head.clear();
-            inner.encoding = None;
             inner.connection_type = None;
             inner.response_size = 0;
             inner.error = None;
@@ -854,11 +850,10 @@ impl ResponsePool {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use body::Binary;
+    use body::Body;
     use http;
     use http::header::{HeaderValue, CONTENT_TYPE, COOKIE};
 
-    use header::ContentEncoding;
     // use test::TestRequest;
 
     #[test]
@@ -953,24 +948,24 @@ mod tests {
         assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(), "text/plain")
     }
 
-    #[test]
-    fn test_content_encoding() {
-        let resp = Response::build(StatusCode::OK).finish();
-        assert_eq!(resp.content_encoding(), None);
+    // #[test]
+    // fn test_content_encoding() {
+    //     let resp = Response::build(StatusCode::OK).finish();
+    //     assert_eq!(resp.content_encoding(), None);
 
-        #[cfg(feature = "brotli")]
-        {
-            let resp = Response::build(StatusCode::OK)
-                .content_encoding(ContentEncoding::Br)
-                .finish();
-            assert_eq!(resp.content_encoding(), Some(ContentEncoding::Br));
-        }
+    //     #[cfg(feature = "brotli")]
+    //     {
+    //         let resp = Response::build(StatusCode::OK)
+    //             .content_encoding(ContentEncoding::Br)
+    //             .finish();
+    //         assert_eq!(resp.content_encoding(), Some(ContentEncoding::Br));
+    //     }
 
-        let resp = Response::build(StatusCode::OK)
-            .content_encoding(ContentEncoding::Gzip)
-            .finish();
-        assert_eq!(resp.content_encoding(), Some(ContentEncoding::Gzip));
-    }
+    //     let resp = Response::build(StatusCode::OK)
+    //         .content_encoding(ContentEncoding::Gzip)
+    //         .finish();
+    //     assert_eq!(resp.content_encoding(), Some(ContentEncoding::Gzip));
+    // }
 
     #[test]
     fn test_json() {
@@ -1020,15 +1015,6 @@ mod tests {
         );
     }
 
-    impl Body {
-        pub(crate) fn bin_ref(&self) -> &Binary {
-            match *self {
-                Body::Binary(ref bin) => bin,
-                _ => panic!(),
-            }
-        }
-    }
-
     #[test]
     fn test_into_response() {
         let resp: Response = "test".into();
@@ -1038,7 +1024,7 @@ mod tests {
             HeaderValue::from_static("text/plain; charset=utf-8")
         );
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.body().bin_ref(), &Binary::from("test"));
+        assert_eq!(resp.body().get_ref(), b"test");
 
         let resp: Response = b"test".as_ref().into();
         assert_eq!(resp.status(), StatusCode::OK);
@@ -1047,7 +1033,7 @@ mod tests {
             HeaderValue::from_static("application/octet-stream")
         );
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.body().bin_ref(), &Binary::from(b"test".as_ref()));
+        assert_eq!(resp.body().get_ref(), b"test");
 
         let resp: Response = "test".to_owned().into();
         assert_eq!(resp.status(), StatusCode::OK);
@@ -1056,7 +1042,7 @@ mod tests {
             HeaderValue::from_static("text/plain; charset=utf-8")
         );
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.body().bin_ref(), &Binary::from("test".to_owned()));
+        assert_eq!(resp.body().get_ref(), b"test");
 
         let resp: Response = (&"test".to_owned()).into();
         assert_eq!(resp.status(), StatusCode::OK);
@@ -1065,7 +1051,7 @@ mod tests {
             HeaderValue::from_static("text/plain; charset=utf-8")
         );
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.body().bin_ref(), &Binary::from(&"test".to_owned()));
+        assert_eq!(resp.body().get_ref(), b"test");
 
         let b = Bytes::from_static(b"test");
         let resp: Response = b.into();
@@ -1075,10 +1061,7 @@ mod tests {
             HeaderValue::from_static("application/octet-stream")
         );
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(
-            resp.body().bin_ref(),
-            &Binary::from(Bytes::from_static(b"test"))
-        );
+        assert_eq!(resp.body().get_ref(), b"test");
 
         let b = Bytes::from_static(b"test");
         let resp: Response = b.into();
@@ -1088,7 +1071,7 @@ mod tests {
             HeaderValue::from_static("application/octet-stream")
         );
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.body().bin_ref(), &Binary::from(BytesMut::from("test")));
+        assert_eq!(resp.body().get_ref(), b"test");
 
         let b = BytesMut::from("test");
         let resp: Response = b.into();
@@ -1098,7 +1081,7 @@ mod tests {
             HeaderValue::from_static("application/octet-stream")
         );
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.body().bin_ref(), &Binary::from(BytesMut::from("test")));
+        assert_eq!(resp.body().get_ref(), b"test");
     }
 
     #[test]
diff --git a/src/service.rs b/src/service.rs
index ac92a0f7..51a16b48 100644
--- a/src/service.rs
+++ b/src/service.rs
@@ -72,7 +72,7 @@ where
 }
 
 pub struct SendErrorFut<T, R, E> {
-    res: Option<Message<Response>>,
+    res: Option<Message<Response<()>>>,
     framed: Option<Framed<T, Codec>>,
     err: Option<E>,
     _t: PhantomData<R>,
@@ -188,7 +188,7 @@ where
 }
 
 pub struct SendResponseFut<T, B> {
-    res: Option<Message<Response>>,
+    res: Option<Message<Response<()>>>,
     body: Option<B>,
     framed: Option<Framed<T, Codec>>,
 }
diff --git a/src/test.rs b/src/test.rs
index 43974934..c6f258a7 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -4,6 +4,7 @@ use std::str::FromStr;
 
 use actix::System;
 
+use bytes::Bytes;
 use cookie::Cookie;
 use futures::Future;
 use http::header::HeaderName;
@@ -11,7 +12,6 @@ use http::{HeaderMap, HttpTryFrom, Method, Uri, Version};
 use net2::TcpBuilder;
 use tokio::runtime::current_thread::Runtime;
 
-use body::Binary;
 use header::{Header, IntoHeaderValue};
 use payload::Payload;
 use request::Request;
@@ -362,10 +362,9 @@ impl TestRequest {
     }
 
     /// Set request payload
-    pub fn set_payload<B: Into<Binary>>(mut self, data: B) -> Self {
-        let mut data = data.into();
+    pub fn set_payload<B: Into<Bytes>>(mut self, data: B) -> Self {
         let mut payload = Payload::empty();
-        payload.unread_data(data.take());
+        payload.unread_data(data.into());
         self.payload = Some(payload);
         self
     }
diff --git a/src/ws/codec.rs b/src/ws/codec.rs
index 5bdc5819..10c50528 100644
--- a/src/ws/codec.rs
+++ b/src/ws/codec.rs
@@ -1,10 +1,9 @@
-use bytes::BytesMut;
+use bytes::{Bytes, BytesMut};
 use tokio_codec::{Decoder, Encoder};
 
 use super::frame::Parser;
 use super::proto::{CloseReason, OpCode};
 use super::ProtocolError;
-use body::Binary;
 
 /// `WebSocket` Message
 #[derive(Debug, PartialEq)]
@@ -12,7 +11,7 @@ pub enum Message {
     /// Text message
     Text(String),
     /// Binary message
-    Binary(Binary),
+    Binary(Bytes),
     /// Ping message
     Ping(String),
     /// Pong message
diff --git a/src/ws/frame.rs b/src/ws/frame.rs
index ca5f0e89..56d28296 100644
--- a/src/ws/frame.rs
+++ b/src/ws/frame.rs
@@ -1,8 +1,7 @@
 use byteorder::{ByteOrder, LittleEndian, NetworkEndian};
-use bytes::{BufMut, BytesMut};
+use bytes::{BufMut, Bytes, BytesMut};
 use rand;
 
-use body::Binary;
 use ws::mask::apply_mask;
 use ws::proto::{CloseCode, CloseReason, OpCode};
 use ws::ProtocolError;
@@ -151,7 +150,7 @@ impl Parser {
     }
 
     /// Generate binary representation
-    pub fn write_message<B: Into<Binary>>(
+    pub fn write_message<B: Into<Bytes>>(
         dst: &mut BytesMut,
         pl: B,
         op: OpCode,
diff --git a/tests/test_server.rs b/tests/test_server.rs
index c8de0290..c499cf63 100644
--- a/tests/test_server.rs
+++ b/tests/test_server.rs
@@ -15,7 +15,7 @@ use bytes::Bytes;
 use futures::future::{self, ok};
 use futures::stream::once;
 
-use actix_http::{h1, http, Body, KeepAlive, Request, Response};
+use actix_http::{body, h1, http, Body, Error, KeepAlive, Request, Response};
 
 #[test]
 fn test_h1_v2() {
@@ -349,11 +349,9 @@ fn test_body_length() {
             .bind("test", addr, move || {
                 h1::H1Service::new(|_| {
                     let body = once(Ok(Bytes::from_static(STR.as_ref())));
-                    ok::<_, ()>(
-                        Response::Ok()
-                            .content_length(STR.len() as u64)
-                            .body(Body::Streaming(Box::new(body))),
-                    )
+                    ok::<_, ()>(Response::Ok().body(Body::from_message(
+                        body::SizedStream::new(STR.len(), body),
+                    )))
                 }).map(|_| ())
             }).unwrap()
             .run()
@@ -379,12 +377,8 @@ fn test_body_chunked_explicit() {
         Server::new()
             .bind("test", addr, move || {
                 h1::H1Service::new(|_| {
-                    let body = once(Ok(Bytes::from_static(STR.as_ref())));
-                    ok::<_, ()>(
-                        Response::Ok()
-                            .chunked()
-                            .body(Body::Streaming(Box::new(body))),
-                    )
+                    let body = once::<_, Error>(Ok(Bytes::from_static(STR.as_ref())));
+                    ok::<_, ()>(Response::Ok().streaming(body))
                 }).map(|_| ())
             }).unwrap()
             .run()
@@ -412,8 +406,8 @@ fn test_body_chunked_implicit() {
         Server::new()
             .bind("test", addr, move || {
                 h1::H1Service::new(|_| {
-                    let body = once(Ok(Bytes::from_static(STR.as_ref())));
-                    ok::<_, ()>(Response::Ok().body(Body::Streaming(Box::new(body))))
+                    let body = once::<_, Error>(Ok(Bytes::from_static(STR.as_ref())));
+                    ok::<_, ()>(Response::Ok().streaming(body))
                 }).map(|_| ())
             }).unwrap()
             .run()
diff --git a/tests/test_ws.rs b/tests/test_ws.rs
index 85770fa8..c246d5e4 100644
--- a/tests/test_ws.rs
+++ b/tests/test_ws.rs
@@ -18,7 +18,7 @@ use bytes::{Bytes, BytesMut};
 use futures::future::{lazy, ok, Either};
 use futures::{Future, IntoFuture, Sink, Stream};
 
-use actix_http::{h1, ws, ResponseError, ServiceConfig};
+use actix_http::{h1, ws, ResponseError, SendResponse, ServiceConfig};
 
 fn ws_service(req: ws::Frame) -> impl Future<Item = ws::Message, Error = io::Error> {
     match req {
@@ -55,20 +55,19 @@ fn test_simple() {
                             match ws::verify_handshake(&req) {
                                 Err(e) => {
                                     // validation failed
-                                    let resp = e.error_response();
                                     Either::A(
-                                        framed
-                                            .send(h1::Message::Item(resp))
+                                        SendResponse::send(framed, e.error_response())
                                             .map_err(|_| ())
                                             .map(|_| ()),
                                     )
                                 }
-                                Ok(_) => Either::B(
-                                    // send response
-                                    framed
-                                        .send(h1::Message::Item(
+                                Ok(_) => {
+                                    Either::B(
+                                        // send handshake response
+                                        SendResponse::send(
+                                            framed,
                                             ws::handshake_response(&req).finish(),
-                                        )).map_err(|_| ())
+                                        ).map_err(|_| ())
                                         .and_then(|framed| {
                                             // start websocket service
                                             let framed =
@@ -76,7 +75,8 @@ fn test_simple() {
                                             ws::Transport::with(framed, ws_service)
                                                 .map_err(|_| ())
                                         }),
-                                ),
+                                    )
+                                }
                             }
                         } else {
                             panic!()