impl response body support

src/h1/codec.rs

@@ -6,7 +6,7 @@ use tokio_codec::{Decoder, Encoder};
 
 use super::decoder::{PayloadDecoder, PayloadItem, RequestDecoder};
 use super::encoder::{ResponseEncoder, ResponseLength};
-use body::Body;
+use body::{Binary, Body};
 use config::ServiceConfig;
 use error::ParseError;
 use helpers;
@@ -26,12 +26,13 @@ bitflags! {
 
 const AVERAGE_HEADER_SIZE: usize = 30;
 
+#[derive(Debug)]
 /// Http response
 pub enum OutMessage {
     /// Http response message
     Response(Response),
     /// Payload chunk
-    Payload(Bytes),
+    Payload(Option<Binary>),
 }
 
 /// Incoming http/1 request
@@ -151,6 +152,7 @@ impl Codec {
             buffer.extend_from_slice(reason);
 
             // content length
+            let mut len_is_set = true;
             match self.te.length {
                 ResponseLength::Chunked => {
                     buffer.extend_from_slice(b"\r\ntransfer-encoding: chunked\r\n")
@@ -167,6 +169,10 @@ impl Codec {
                     buffer.extend_from_slice(b"\r\n");
                 }
                 ResponseLength::None => buffer.extend_from_slice(b"\r\n"),
+                ResponseLength::HeaderOrZero => {
+                    len_is_set = false;
+                    buffer.extend_from_slice(b"\r\n")
+                }
             }
 
             // write headers
@@ -179,6 +185,9 @@ impl Codec {
                     TRANSFER_ENCODING => continue,
                     CONTENT_LENGTH => match self.te.length {
                         ResponseLength::None => (),
+                        ResponseLength::HeaderOrZero => {
+                            len_is_set = true;
+                        }
                         _ => continue,
                     },
                     DATE => {
@@ -215,11 +224,13 @@ impl Codec {
             unsafe {
                 buffer.advance_mut(pos);
             }
+            if !len_is_set {
+                buffer.extend_from_slice(b"content-length: 0\r\n")
+            }
 
             // optimized date header, set_date writes \r\n
             if !has_date {
                 self.config.set_date(buffer);
-                buffer.extend_from_slice(b"\r\n");
             } else {
                 // msg eof
                 buffer.extend_from_slice(b"\r\n");
@@ -272,8 +283,11 @@ impl Encoder for Codec {
             OutMessage::Response(res) => {
                 self.encode_response(res, dst)?;
             }
-            OutMessage::Payload(bytes) => {
-                dst.extend_from_slice(&bytes);
+            OutMessage::Payload(Some(bytes)) => {
+                self.te.encode(bytes.as_ref(), dst)?;
+            }
+            OutMessage::Payload(None) => {
+                self.te.encode_eof(dst)?;
             }
         }
         Ok(())

src/h1/dispatcher.rs

@@ -12,7 +12,7 @@ use tokio_timer::Delay;
 use error::{ParseError, PayloadError};
 use payload::{Payload, PayloadSender, PayloadStatus, PayloadWriter};
 
-use body::Body;
+use body::{Body, BodyStream};
 use config::ServiceConfig;
 use error::DispatchError;
 use request::Request;
@@ -61,9 +61,8 @@ enum Message {
 enum State<S: Service> {
     None,
     ServiceCall(S::Future),
-    SendResponse(Option<OutMessage>),
-    SendResponseWithPayload(Option<(OutMessage, Body)>),
-    Payload(Body),
+    SendResponse(Option<(OutMessage, Body)>),
+    SendPayload(Option<BodyStream>, Option<OutMessage>),
 }
 
 impl<S: Service> State<S> {
@@ -99,6 +98,7 @@ where
         };
         let framed = Framed::new(stream, Codec::new(config.clone()));
 
+        // keep-alive timer
         let (ka_expire, ka_timer) = if let Some(delay) = timeout {
             (delay.deadline(), Some(delay))
         } else if let Some(delay) = config.keep_alive_timer() {
@@ -174,35 +174,32 @@ where
                     break if let Some(msg) = self.messages.pop_front() {
                         match msg {
                             Message::Item(req) => Some(self.handle_request(req)?),
-                            Message::Error(res) => Some(State::SendResponse(Some(
+                            Message::Error(res) => Some(State::SendResponse(Some((
                                 OutMessage::Response(res),
-                            ))),
+                                Body::Empty,
+                            )))),
                         }
                     } else {
                         None
                     };
                 },
-                State::Payload(ref mut _body) => unimplemented!(),
-                State::ServiceCall(ref mut fut) => match fut
-                    .poll()
-                    .map_err(DispatchError::Service)?
-                {
+                // call inner service
+                State::ServiceCall(ref mut fut) => {
+                    match fut.poll().map_err(DispatchError::Service)? {
                         Async::Ready(mut res) => {
                             self.framed.get_codec_mut().prepare_te(&mut res);
                             let body = res.replace_body(Body::Empty);
-                        if body.is_empty() {
-                            Some(State::SendResponse(Some(OutMessage::Response(res))))
-                        } else {
-                            Some(State::SendResponseWithPayload(Some((
+                            Some(State::SendResponse(Some((
                                 OutMessage::Response(res),
                                 body,
                             ))))
                         }
-                    }
                         Async::NotReady => None,
-                },
+                    }
+                }
+                // send respons
                 State::SendResponse(ref mut item) => {
-                    let msg = item.take().expect("SendResponse is empty");
+                    let (msg, body) = item.take().expect("SendResponse is empty");
                     match self.framed.start_send(msg) {
                         Ok(AsyncSink::Ready) => {
                             self.flags.set(
@@ -210,32 +207,17 @@ where
                                 self.framed.get_codec().keepalive(),
                             );
                             self.flags.remove(Flags::FLUSHED);
-                            Some(State::None)
-                        }
-                        Ok(AsyncSink::NotReady(msg)) => {
-                            *item = Some(msg);
-                            return Ok(());
-                        }
-                        Err(err) => {
-                            if let Some(mut payload) = self.payload.take() {
-                                payload.set_error(PayloadError::Incomplete);
-                            }
-                            return Err(DispatchError::Io(err));
+                            match body {
+                                Body::Empty => Some(State::None),
+                                Body::Binary(bin) => Some(State::SendPayload(
+                                    None,
+                                    Some(OutMessage::Payload(bin.into())),
+                                )),
+                                Body::Streaming(stream) => {
+                                    Some(State::SendPayload(Some(stream), None))
                                 }
                             }
                         }
-                State::SendResponseWithPayload(ref mut item) => {
-                    let (msg, body) =
-                        item.take().expect("SendResponseWithPayload is empty");
-                    match self.framed.start_send(msg) {
-                        Ok(AsyncSink::Ready) => {
-                            self.flags.set(
-                                Flags::KEEPALIVE,
-                                self.framed.get_codec().keepalive(),
-                            );
-                            self.flags.remove(Flags::FLUSHED);
-                            Some(State::Payload(body))
-                        }
                         Ok(AsyncSink::NotReady(msg)) => {
                             *item = Some((msg, body));
                             return Ok(());
@@ -248,6 +230,48 @@ where
                         }
                     }
                 }
+                // Send payload
+                State::SendPayload(ref mut stream, ref mut bin) => {
+                    if let Some(item) = bin.take() {
+                        match self.framed.start_send(item) {
+                            Ok(AsyncSink::Ready) => {
+                                self.flags.remove(Flags::FLUSHED);
+                            }
+                            Ok(AsyncSink::NotReady(item)) => {
+                                *bin = Some(item);
+                                return Ok(());
+                            }
+                            Err(err) => return Err(DispatchError::Io(err)),
+                        }
+                    }
+                    if let Some(ref mut stream) = stream {
+                        match stream.poll() {
+                            Ok(Async::Ready(Some(item))) => match self
+                                .framed
+                                .start_send(OutMessage::Payload(Some(item.into())))
+                            {
+                                Ok(AsyncSink::Ready) => {
+                                    self.flags.remove(Flags::FLUSHED);
+                                    continue;
+                                }
+                                Ok(AsyncSink::NotReady(msg)) => {
+                                    *bin = Some(msg);
+                                    return Ok(());
+                                }
+                                Err(err) => return Err(DispatchError::Io(err)),
+                            },
+                            Ok(Async::Ready(None)) => Some(State::SendPayload(
+                                None,
+                                Some(OutMessage::Payload(None)),
+                            )),
+                            Ok(Async::NotReady) => return Ok(()),
+                            // Err(err) => return Err(DispatchError::Io(err)),
+                            Err(_) => return Err(DispatchError::Unknown),
+                        }
+                    } else {
+                        Some(State::None)
+                    }
+                }
             };
 
             match state {
@@ -275,19 +299,13 @@ where
             Async::Ready(mut res) => {
                 self.framed.get_codec_mut().prepare_te(&mut res);
                 let body = res.replace_body(Body::Empty);
-                if body.is_empty() {
-                    Ok(State::SendResponse(Some(OutMessage::Response(res))))
-                } else {
-                    Ok(State::SendResponseWithPayload(Some((
-                        OutMessage::Response(res),
-                        body,
-                    ))))
-                }
+                Ok(State::SendResponse(Some((OutMessage::Response(res), body))))
             }
             Async::NotReady => Ok(State::ServiceCall(task)),
         }
     }
 
+    /// Process one incoming message
     fn one_message(&mut self, msg: InMessage) -> Result<(), DispatchError<S::Error>> {
         self.flags.insert(Flags::STARTED);
 
@@ -408,9 +426,11 @@ where
                                 // timeout on first request (slow request) return 408
                                 trace!("Slow request timeout");
                                 self.flags.insert(Flags::STARTED | Flags::DISCONNECTED);
-                                self.state =
-                                    State::SendResponse(Some(OutMessage::Response(
+                                self.state = State::SendResponse(Some((
+                                    OutMessage::Response(
                                         Response::RequestTimeout().finish(),
+                                    ),
+                                    Body::Empty,
                                 )));
                             }
                         } else if let Some(deadline) = self.config.keep_alive_expire() {

src/h1/encoder.rs

@@ -17,9 +17,13 @@ use response::Response;
 #[derive(Debug)]
 pub(crate) enum ResponseLength {
     Chunked,
+    /// Content length is 0
     Zero,
+    /// Check if headers contains length or write 0
+    HeaderOrZero,
     Length(usize),
     Length64(u64),
+    /// Do no set content-length
     None,
 }
 
@@ -41,6 +45,16 @@ impl Default for ResponseEncoder {
 }
 
 impl ResponseEncoder {
+    /// Encode message
+    pub fn encode(&mut self, msg: &[u8], buf: &mut BytesMut) -> io::Result<bool> {
+        self.te.encode(msg, buf)
+    }
+
+    /// Encode eof
+    pub fn encode_eof(&mut self, buf: &mut BytesMut) -> io::Result<()> {
+        self.te.encode_eof(buf)
+    }
+
     pub fn update(&mut self, resp: &mut Response, head: bool, version: Version) {
         self.head = head;
 
@@ -63,17 +77,13 @@ impl ResponseEncoder {
 
         let transfer = match resp.body() {
             Body::Empty => {
-                if !self.head {
                 self.length = match resp.status() {
                     StatusCode::NO_CONTENT
                     | StatusCode::CONTINUE
                     | StatusCode::SWITCHING_PROTOCOLS
                     | StatusCode::PROCESSING => ResponseLength::None,
-                        _ => ResponseLength::Zero,
+                    _ => ResponseLength::HeaderOrZero,
                 };
-                } else {
-                    self.length = ResponseLength::Zero;
-                }
                 TransferEncoding::empty()
             }
             Body::Binary(_) => {
@@ -253,16 +263,22 @@ impl TransferEncoding {
 
     /// Encode eof. Return `EOF` state of encoder
     #[inline]
-    pub fn encode_eof(&mut self, buf: &mut BytesMut) -> bool {
+    pub fn encode_eof(&mut self, buf: &mut BytesMut) -> io::Result<()> {
         match self.kind {
-            TransferEncodingKind::Eof => true,
-            TransferEncodingKind::Length(rem) => rem == 0,
+            TransferEncodingKind::Eof => Ok(()),
+            TransferEncodingKind::Length(rem) => {
+                if rem != 0 {
+                    Err(io::Error::new(io::ErrorKind::UnexpectedEof, ""))
+                } else {
+                    Ok(())
+                }
+            }
             TransferEncodingKind::Chunked(ref mut eof) => {
                 if !*eof {
                     *eof = true;
                     buf.extend_from_slice(b"0\r\n\r\n");
                 }
-                true
+                Ok(())
             }
         }
     }

tests/test_server.rs

@@ -2,6 +2,7 @@ extern crate actix;
 extern crate actix_http;
 extern crate actix_net;
 extern crate actix_web;
+extern crate bytes;
 extern crate futures;
 
 use std::{io::Read, io::Write, net, thread, time};
@@ -9,9 +10,11 @@ use std::{io::Read, io::Write, net, thread, time};
 use actix::System;
 use actix_net::server::Server;
 use actix_web::{client, test, HttpMessage};
-use futures::future;
+use bytes::Bytes;
+use futures::future::{self, ok};
+use futures::stream::once;
 
-use actix_http::{h1, KeepAlive, Request, Response};
+use actix_http::{h1, Body, KeepAlive, Request, Response};
 
 #[test]
 fn test_h1_v2() {
@@ -33,7 +36,7 @@ fn test_h1_v2() {
 
     let mut sys = System::new("test");
     {
-        let req = client::ClientRequest::get(format!("http://{}/", addr).as_str())
+        let req = client::ClientRequest::get(format!("http://{}/", addr))
             .finish()
             .unwrap();
         let response = sys.block_on(req.send()).unwrap();
@@ -68,9 +71,7 @@ fn test_malformed_request() {
     thread::spawn(move || {
         Server::new()
             .bind("test", addr, move || {
-                h1::H1Service::build()
-                    .client_timeout(100)
-                    .finish(|_| future::ok::<_, ()>(Response::Ok().finish()))
+                h1::H1Service::new(|_| future::ok::<_, ()>(Response::Ok().finish()))
             }).unwrap()
             .run();
     });
@@ -117,8 +118,7 @@ fn test_content_length() {
     let mut sys = System::new("test");
     {
         for i in 0..4 {
-            let req =
-                client::ClientRequest::get(format!("http://{}/{}", addr, i).as_str())
+            let req = client::ClientRequest::get(format!("http://{}/{}", addr, i))
                 .finish()
                 .unwrap();
             let response = sys.block_on(req.send()).unwrap();
@@ -126,8 +126,7 @@ fn test_content_length() {
         }
 
         for i in 4..6 {
-            let req =
-                client::ClientRequest::get(format!("http://{}/{}", addr, i).as_str())
+            let req = client::ClientRequest::get(format!("http://{}/{}", addr, i))
                 .finish()
                 .unwrap();
             let response = sys.block_on(req.send()).unwrap();
@@ -135,3 +134,290 @@ fn test_content_length() {
         }
     }
 }
+
+#[test]
+fn test_headers() {
+    let data = STR.repeat(10);
+    let data2 = data.clone();
+
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        Server::new()
+            .bind("test", addr, move || {
+                let data = data.clone();
+                h1::H1Service::new(move |_| {
+                    let mut builder = Response::Ok();
+                    for idx in 0..90 {
+                        builder.header(
+                            format!("X-TEST-{}", idx).as_str(),
+                            "TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST \
+                             TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST ",
+                        );
+                    }
+                    future::ok::<_, ()>(builder.body(data.clone()))
+                })
+            })
+            .unwrap()
+            .run()
+    });
+    thread::sleep(time::Duration::from_millis(400));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::get(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = sys.block_on(response.body()).unwrap();
+    assert_eq!(bytes, Bytes::from(data2));
+}
+
+const STR: &str = "Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World \
+                   Hello World Hello World Hello World Hello World Hello World";
+
+#[test]
+fn test_body() {
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        Server::new()
+            .bind("test", addr, move || {
+                h1::H1Service::new(|_| future::ok::<_, ()>(Response::Ok().body(STR)))
+            }).unwrap()
+            .run();
+    });
+    thread::sleep(time::Duration::from_millis(100));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::get(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = sys.block_on(response.body()).unwrap();
+    assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
+}
+
+#[test]
+fn test_head_empty() {
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        Server::new()
+            .bind("test", addr, move || {
+                h1::H1Service::new(|_| {
+                    ok::<_, ()>(Response::Ok().content_length(STR.len() as u64).finish())
+                })
+            }).unwrap()
+            .run()
+    });
+    thread::sleep(time::Duration::from_millis(100));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::head(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    {
+        println!("RESP: {:?}", response);
+        let len = response
+            .headers()
+            .get(http::header::CONTENT_LENGTH)
+            .unwrap();
+        assert_eq!(format!("{}", STR.len()), len.to_str().unwrap());
+    }
+
+    // read response
+    let bytes = sys.block_on(response.body()).unwrap();
+    assert!(bytes.is_empty());
+}
+
+#[test]
+fn test_head_binary() {
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        Server::new()
+            .bind("test", addr, move || {
+                h1::H1Service::new(|_| {
+                    ok::<_, ()>(
+                        Response::Ok().content_length(STR.len() as u64).body(STR),
+                    )
+                })
+            }).unwrap()
+            .run()
+    });
+    thread::sleep(time::Duration::from_millis(100));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::head(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    {
+        let len = response
+            .headers()
+            .get(http::header::CONTENT_LENGTH)
+            .unwrap();
+        assert_eq!(format!("{}", STR.len()), len.to_str().unwrap());
+    }
+
+    // read response
+    let bytes = sys.block_on(response.body()).unwrap();
+    assert!(bytes.is_empty());
+}
+
+#[test]
+fn test_head_binary2() {
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        Server::new()
+            .bind("test", addr, move || {
+                h1::H1Service::new(|_| ok::<_, ()>(Response::Ok().body(STR)))
+            }).unwrap()
+            .run()
+    });
+    thread::sleep(time::Duration::from_millis(100));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::head(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    {
+        let len = response
+            .headers()
+            .get(http::header::CONTENT_LENGTH)
+            .unwrap();
+        assert_eq!(format!("{}", STR.len()), len.to_str().unwrap());
+    }
+}
+
+#[test]
+fn test_body_length() {
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        Server::new()
+            .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))),
+                    )
+                })
+            }).unwrap()
+            .run()
+    });
+    thread::sleep(time::Duration::from_millis(100));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::get(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = sys.block_on(response.body()).unwrap();
+    assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
+}
+
+#[test]
+fn test_body_chunked_explicit() {
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        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))),
+                    )
+                })
+            }).unwrap()
+            .run()
+    });
+    thread::sleep(time::Duration::from_millis(100));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::get(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = sys.block_on(response.body()).unwrap();
+
+    // decode
+    assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
+}
+
+#[test]
+fn test_body_chunked_implicit() {
+    let addr = test::TestServer::unused_addr();
+    thread::spawn(move || {
+        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))))
+                })
+            }).unwrap()
+            .run()
+    });
+    thread::sleep(time::Duration::from_millis(100));
+
+    let mut sys = System::new("test");
+    let req = client::ClientRequest::get(format!("http://{}/", addr))
+        .finish()
+        .unwrap();
+    let response = sys.block_on(req.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = sys.block_on(response.body()).unwrap();
+    assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
+}