Merge pull request #65 from vorot93/rust-2018

Upgrade to Rust 2018, format the code

Cargo.toml

@@ -9,6 +9,7 @@ homepage = "https://github.com/snapview/tokio-tungstenite"
 documentation = "https://docs.rs/tokio-tungstenite/0.9.0"
 repository = "https://github.com/snapview/tokio-tungstenite"
 version = "0.9.0"
+edition = "2018"
 
 [features]
 default = ["connect", "tls"]

README.md

@@ -10,19 +10,13 @@ Asynchronous WebSockets for Tokio stack.
 
 ## Usage
 
-First, you need to add this in your `Cargo.toml`:
+Add this in your `Cargo.toml`:
 
 ```toml
 [dependencies]
 tokio-tungstenite = "*"
 ```
 
-Next, add this to your crate:
-
-```rust
-extern crate tokio_tungstenite;
-```
-
 Take a look at the `examples/` directory for client and server examples. You may also want to get familiar with
 [tokio](https://tokio.rs/) if you don't have any experience with it.
 

examples/autobahn-client.rs

@@ -1,27 +1,15 @@
-#[macro_use] extern crate log;
-extern crate env_logger;
-extern crate futures;
-extern crate tokio;
-extern crate tokio_tungstenite;
-extern crate url;
-
-use url::Url;
 use futures::{Future, Stream};
+use log::*;
 use tokio_tungstenite::{
     connect_async,
-    tungstenite::{
+    tungstenite::{connect, Error as WsError, Result},
-        connect,
-        Result,
-        Error as WsError,
-    },
 };
+use url::Url;
 
 const AGENT: &'static str = "Tungstenite";
 
 fn get_case_count() -> Result<u32> {
-    let (mut socket, _) = connect(
+    let (mut socket, _) = connect(Url::parse("ws://localhost:9001/getCaseCount").unwrap())?;
-        Url::parse("ws://localhost:9001/getCaseCount").unwrap(),
-    )?;
     let msg = socket.read_message()?;
     socket.close(None)?;
     Ok(msg.into_text()?.parse::<u32>().unwrap())
@@ -29,7 +17,11 @@ fn get_case_count() -> Result<u32> {
 
 fn update_reports() -> Result<()> {
     let (mut socket, _) = connect(
-        Url::parse(&format!("ws://localhost:9001/updateReports?agent={}", AGENT)).unwrap(),
+        Url::parse(&format!(
+            "ws://localhost:9001/updateReports?agent={}",
+            AGENT
+        ))
+        .unwrap(),
     )?;
     socket.close(None)?;
     Ok(())
@@ -37,9 +29,11 @@ fn update_reports() -> Result<()> {
 
 fn run_test(case: u32) {
     info!("Running test case {}", case);
-    let case_url = Url::parse(
+    let case_url = Url::parse(&format!(
-        &format!("ws://localhost:9001/runCase?case={}&agent={}", case, AGENT)
+        "ws://localhost:9001/runCase?case={}&agent={}",
-    ).unwrap();
+        case, AGENT
+    ))
+    .unwrap();
 
     let job = connect_async(case_url)
         .map_err(|err| error!("Connect error: {}", err))
@@ -49,11 +43,9 @@ fn run_test(case: u32) {
                 .filter(|msg| msg.is_text() || msg.is_binary())
                 .forward(sink)
                 .and_then(|(_stream, _sink)| Ok(()))
-                .map_err(|err| {
+                .map_err(|err| match err {
-                    match err {
                     WsError::ConnectionClosed => (),
                     err => info!("WS error {}", err),
-                    }
                 })
         });
 

examples/autobahn-server.rs

@@ -1,15 +1,7 @@
-#[macro_use] extern crate log;
-extern crate env_logger;
-extern crate futures;
-extern crate tokio;
-extern crate tokio_tungstenite;
-
 use futures::{Future, Stream};
+use log::*;
 use tokio::net::TcpListener;
-use tokio_tungstenite::{
+use tokio_tungstenite::{accept_async, tungstenite::Error as WsError};
-    accept_async,
-    tungstenite::Error as WsError,
-};
 
 fn main() {
     env_logger::init();
@@ -20,9 +12,13 @@ fn main() {
     let socket = TcpListener::bind(&addr).unwrap();
     info!("Listening on: {}", addr);
 
-    let srv = socket.incoming().map_err(Into::into).for_each(move |stream| {
+    let srv = socket
-
+        .incoming()
-        let peer = stream.peer_addr().expect("connected streams should have a peer address");
+        .map_err(Into::into)
+        .for_each(move |stream| {
+            let peer = stream
+                .peer_addr()
+                .expect("connected streams should have a peer address");
             info!("Peer address: {}", peer);
 
             accept_async(stream).and_then(move |ws_stream| {
@@ -32,11 +28,9 @@ fn main() {
                     .filter(|msg| msg.is_text() || msg.is_binary())
                     .forward(sink)
                     .and_then(|(_stream, _sink)| Ok(()))
-                .map_err(|err| {
+                    .map_err(|err| match err {
-                    match err {
                         WsError::ConnectionClosed => (),
                         err => info!("WS error: {}", err),
-                    }
                     });
 
                 tokio::spawn(job);
@@ -44,6 +38,5 @@ fn main() {
             })
         });
 
-
     runtime.block_on(srv).unwrap();
 }

examples/client.rs

@@ -10,12 +10,6 @@
 //!
 //! You can use this example together with the `server` example.
 
-extern crate futures;
-extern crate tokio;
-extern crate tokio_tungstenite;
-extern crate tungstenite;
-extern crate url;
-
 use std::env;
 use std::io::{self, Read, Write};
 use std::thread;
@@ -29,9 +23,9 @@ use tokio_tungstenite::stream::PeerAddr;
 
 fn main() {
     // Specify the server address to which the client will be connecting.
-    let connect_addr = env::args().nth(1).unwrap_or_else(|| {
+    let connect_addr = env::args()
-        panic!("this program requires at least one argument")
+        .nth(1)
-    });
+        .unwrap_or_else(|| panic!("this program requires at least one argument"));
 
     let url = url::Url::parse(&connect_addr).unwrap();
 
@@ -59,10 +53,13 @@ fn main() {
     // finishes. If we don't have any more data to read or we won't receive any
     // more work from the remote then we can exit.
     let mut stdout = io::stdout();
-    let client = connect_async(url).and_then(move |(ws_stream, _)| {
+    let client = connect_async(url)
+        .and_then(move |(ws_stream, _)| {
             println!("WebSocket handshake has been successfully completed");
 
-        let addr = ws_stream.peer_addr().expect("connected streams should have a peer address");
+            let addr = ws_stream
+                .peer_addr()
+                .expect("connected streams should have a peer address");
             println!("Peer address: {}", addr);
 
             // `sink` is the stream of messages going out.
@@ -78,10 +75,12 @@ fn main() {
             });
 
             // Wait for either of futures to complete.
-        send_stdin.map(|_| ())
+            send_stdin
+                .map(|_| ())
                 .select(write_stdout.map(|_| ()))
                 .then(|_| Ok(()))
-    }).map_err(|e| {
+        })
+        .map_err(|e| {
             println!("Error during the websocket handshake occurred: {}", e);
             io::Error::new(io::ErrorKind::Other, e)
         });
@@ -97,8 +96,7 @@ fn read_stdin(mut tx: mpsc::Sender<Message>) {
     loop {
         let mut buf = vec![0; 1024];
         let n = match stdin.read(&mut buf) {
-            Err(_) |
+            Err(_) | Ok(0) => break,
-            Ok(0) => break,
             Ok(n) => n,
         };
         buf.truncate(n);

examples/server.rs

@@ -17,15 +17,10 @@
 //! connected clients they'll all join the same room and see everyone else's
 //! messages.
 
-extern crate futures;
-extern crate tokio;
-extern crate tokio_tungstenite;
-extern crate tungstenite;
-
 use std::collections::HashMap;
 use std::env;
 use std::io::{Error, ErrorKind};
-use std::sync::{Arc,Mutex};
+use std::sync::{Arc, Mutex};
 
 use futures::stream::Stream;
 use futures::Future;
@@ -47,8 +42,9 @@ fn main() {
     let connections = Arc::new(Mutex::new(HashMap::new()));
 
     let srv = socket.incoming().for_each(move |stream| {
-
+        let addr = stream
-        let addr = stream.peer_addr().expect("connected streams should have a peer address");
+            .peer_addr()
+            .expect("connected streams should have a peer address");
         println!("Peer address: {}", addr);
 
         // We have to clone both of these values, because the `and_then`
@@ -58,7 +54,8 @@ fn main() {
         // `for_each` future).
         let connections_inner = connections.clone();
 
-        accept_async(stream).and_then(move |ws_stream| {
+        accept_async(stream)
+            .and_then(move |ws_stream| {
                 println!("New WebSocket connection: {}", addr);
 
                 // Create a channel for our stream, which other sockets will use to
@@ -80,7 +77,8 @@ fn main() {
                     // For each open connection except the sender, send the
                     // string via the channel.
                     let mut conns = connections.lock().unwrap();
-                let iter = conns.iter_mut()
+                    let iter = conns
+                        .iter_mut()
                         .filter(|&(&k, _)| k != addr)
                         .map(|(_, v)| v);
                     for tx in iter {
@@ -100,7 +98,9 @@ fn main() {
                 // Now that we've got futures representing each half of the socket, we
                 // use the `select` combinator to wait for either half to be done to
                 // tear down the other. Then we spawn off the result.
-            let connection = ws_reader.map(|_| ()).map_err(|_| ())
+                let connection = ws_reader
+                    .map(|_| ())
+                    .map_err(|_| ())
                     .select(ws_writer.map(|_| ()).map_err(|_| ()));
 
                 tokio::spawn(connection.then(move |_| {
@@ -110,7 +110,8 @@ fn main() {
                 }));
 
                 Ok(())
-        }).map_err(|e| {
+            })
+            .map_err(|e| {
                 println!("Error during the websocket handshake occurred: {}", e);
                 Error::new(ErrorKind::Other, e)
             })

src/connect.rs

@@ -1,22 +1,19 @@
 //! Connection helper.
 
-extern crate tokio_dns;
-extern crate tokio_tcp;
-
-use std::net::SocketAddr;
 use std::io::Result as IoResult;
+use std::net::SocketAddr;
 
-use self::tokio_tcp::TcpStream;
+use tokio_tcp::TcpStream;
 
 use futures::{future, Future};
 use tokio_io::{AsyncRead, AsyncWrite};
 
-use tungstenite::Error;
 use tungstenite::client::url_mode;
 use tungstenite::handshake::client::Response;
+use tungstenite::Error;
 
-use stream::{NoDelay, PeerAddr};
+use super::{client_async, Request, WebSocketStream};
-use super::{WebSocketStream, Request, client_async};
+use crate::stream::{NoDelay, PeerAddr};
 
 impl NoDelay for TcpStream {
     fn set_nodelay(&mut self, nodelay: bool) -> IoResult<()> {
@@ -30,24 +27,21 @@ impl PeerAddr for TcpStream {
     }
 }
 
-#[cfg(feature="tls")]
+#[cfg(feature = "tls")]
 mod encryption {
-    extern crate native_tls;
+    use native_tls::TlsConnector;
-    extern crate tokio_tls;
+    use tokio_tls::{TlsConnector as TokioTlsConnector, TlsStream};
-
-    use self::native_tls::TlsConnector;
-    use self::tokio_tls::{TlsConnector as TokioTlsConnector, TlsStream};
 
+    use std::io::{Read, Result as IoResult, Write};
     use std::net::SocketAddr;
-    use std::io::{Read, Write, Result as IoResult};
 
     use futures::{future, Future};
     use tokio_io::{AsyncRead, AsyncWrite};
 
-    use tungstenite::Error;
     use tungstenite::stream::Mode;
+    use tungstenite::Error;
 
-    use stream::{NoDelay, PeerAddr, Stream as StreamSwitcher};
+    use crate::stream::{NoDelay, PeerAddr, Stream as StreamSwitcher};
 
     /// A stream that might be protected with TLS.
     pub type MaybeTlsStream<S> = StreamSwitcher<S, TlsStream<S>>;
@@ -66,50 +60,58 @@ mod encryption {
         }
     }
 
-    pub fn wrap_stream<S>(socket: S, domain: String, mode: Mode)
+    pub fn wrap_stream<S>(
-        -> Box<dyn Future<Item=AutoStream<S>, Error=Error> + Send>
+        socket: S,
+        domain: String,
+        mode: Mode,
+    ) -> Box<dyn Future<Item = AutoStream<S>, Error = Error> + Send>
     where
         S: 'static + AsyncRead + AsyncWrite + Send,
     {
         match mode {
             Mode::Plain => Box::new(future::ok(StreamSwitcher::Plain(socket))),
-            Mode::Tls => {
+            Mode::Tls => Box::new(
-                Box::new(future::result(TlsConnector::new())
+                future::result(TlsConnector::new())
                     .map(TokioTlsConnector::from)
                     .and_then(move |connector| connector.connect(&domain, socket))
                     .map(StreamSwitcher::Tls)
-                            .map_err(Error::Tls))
+                    .map_err(Error::Tls),
-            }
+            ),
         }
     }
 }
 
-#[cfg(feature="tls")]
+#[cfg(feature = "tls")]
 pub use self::encryption::MaybeTlsStream;
 
-#[cfg(not(feature="tls"))]
+#[cfg(not(feature = "tls"))]
 mod encryption {
     use futures::{future, Future};
     use tokio_io::{AsyncRead, AsyncWrite};
 
-    use tungstenite::Error;
     use tungstenite::stream::Mode;
+    use tungstenite::Error;
 
     pub type AutoStream<S> = S;
 
-    pub fn wrap_stream<S>(socket: S, _domain: String, mode: Mode)
+    pub fn wrap_stream<S>(
-        -> Box<Future<Item=AutoStream<S>, Error=Error> + Send>
+        socket: S,
+        _domain: String,
+        mode: Mode,
+    ) -> Box<Future<Item = AutoStream<S>, Error = Error> + Send>
     where
         S: 'static + AsyncRead + AsyncWrite + Send,
     {
         match mode {
             Mode::Plain => Box::new(future::ok(socket)),
-            Mode::Tls => Box::new(future::err(Error::Url("TLS support not compiled in.".into()))),
+            Mode::Tls => Box::new(future::err(Error::Url(
+                "TLS support not compiled in.".into(),
+            ))),
         }
     }
 }
 
-use self::encryption::{AutoStream, wrap_stream};
+use self::encryption::{wrap_stream, AutoStream};
 
 /// Get a domain from an URL.
 #[inline]
@@ -122,8 +124,10 @@ fn domain(request: &Request) -> Result<String, Error> {
 
 /// Creates a WebSocket handshake from a request and a stream,
 /// upgrading the stream to TLS if required.
-pub fn client_async_tls<R, S>(request: R, stream: S)
+pub fn client_async_tls<R, S>(
-    -> Box<dyn Future<Item=(WebSocketStream<AutoStream<S>>, Response), Error=Error> + Send>
+    request: R,
+    stream: S,
+) -> Box<dyn Future<Item = (WebSocketStream<AutoStream<S>>, Response), Error = Error> + Send>
 where
     R: Into<Request<'static>>,
     S: 'static + AsyncRead + AsyncWrite + NoDelay + Send,
@@ -141,20 +145,23 @@ where
         Err(e) => return Box::new(future::err(e)),
     };
 
-    Box::new(wrap_stream(stream, domain, mode)
+    Box::new(
+        wrap_stream(stream, domain, mode)
             .and_then(|mut stream| {
                 NoDelay::set_nodelay(&mut stream, true)
                     .map(move |()| stream)
                     .map_err(|e| e.into())
             })
-                .and_then(move |stream| client_async(request, stream)))
+            .and_then(move |stream| client_async(request, stream)),
+    )
 }
 
 /// Connect to a given URL.
-pub fn connect_async<R>(request: R)
+pub fn connect_async<R>(
-    -> Box<dyn Future<Item=(WebSocketStream<AutoStream<TcpStream>>, Response), Error=Error> + Send>
+    request: R,
+) -> Box<dyn Future<Item = (WebSocketStream<AutoStream<TcpStream>>, Response), Error = Error> + Send>
 where
-    R: Into<Request<'static>>
+    R: Into<Request<'static>>,
 {
     let request: Request = request.into();
 
@@ -162,8 +169,14 @@ where
         Ok(domain) => domain,
         Err(err) => return Box::new(future::err(err)),
     };
-    let port = request.url.port_or_known_default().expect("Bug: port unknown");
+    let port = request
+        .url
+        .port_or_known_default()
+        .expect("Bug: port unknown");
 
-    Box::new(tokio_dns::TcpStream::connect((domain.as_str(), port)).map_err(|e| e.into())
+    Box::new(
-                .and_then(move |socket| client_async_tls(request, socket)))
+        tokio_dns::TcpStream::connect((domain.as_str(), port))
+            .map_err(|e| e.into())
+            .and_then(move |socket| client_async_tls(request, socket)),
+    )
 }

src/lib.rs

@@ -13,48 +13,43 @@
     unused_must_use,
     unused_mut,
     unused_imports,
-    unused_import_braces)]
+    unused_import_braces
+)]
 
-extern crate futures;
+pub use tungstenite;
-extern crate tokio_io;
 
-pub extern crate tungstenite;
+#[cfg(feature = "connect")]
-
-#[cfg(feature="connect")]
 mod connect;
 
-#[cfg(feature="stream")]
+#[cfg(feature = "stream")]
 pub mod stream;
 
 use std::io::ErrorKind;
 
-#[cfg(feature="stream")]
+#[cfg(feature = "stream")]
-use std::{
+use std::{io::Result as IoResult, net::SocketAddr};
-    net::SocketAddr,
-    io::Result as IoResult,
-};
 
-use futures::{Poll, Future, Async, AsyncSink, Stream, Sink, StartSend};
+use futures::{Async, AsyncSink, Future, Poll, Sink, StartSend, Stream};
 use tokio_io::{AsyncRead, AsyncWrite};
 
 use tungstenite::{
     error::Error as WsError,
     handshake::{
-        HandshakeRole, HandshakeError,
+        client::{ClientHandshake, Request, Response},
-        client::{ClientHandshake, Response, Request},
+        server::{Callback, NoCallback, ServerHandshake},
-        server::{ServerHandshake, Callback, NoCallback},
+        HandshakeError, HandshakeRole,
     },
-    protocol::{WebSocket, Message, Role, WebSocketConfig},
+    protocol::{Message, Role, WebSocket, WebSocketConfig},
     server,
 };
 
-#[cfg(feature="connect")]
+#[cfg(feature = "connect")]
-pub use connect::{connect_async, client_async_tls};
+pub use connect::{client_async_tls, connect_async};
 
-#[cfg(feature="stream")]
+#[cfg(feature = "stream")]
 pub use stream::PeerAddr;
 
-#[cfg(all(feature="connect", feature="tls"))]
+#[cfg(all(feature = "connect", feature = "tls"))]
 pub use connect::MaybeTlsStream;
 
 /// Creates a WebSocket handshake from a request and a stream.
@@ -69,13 +64,10 @@ pub use connect::MaybeTlsStream;
 ///
 /// This is typically used for clients who have already established, for
 /// example, a TCP connection to the remote server.
-pub fn client_async<'a, R, S>(
+pub fn client_async<'a, R, S>(request: R, stream: S) -> ConnectAsync<S>
-    request: R,
-    stream: S,
-) -> ConnectAsync<S>
 where
     R: Into<Request<'a>>,
-    S: AsyncRead + AsyncWrite
+    S: AsyncRead + AsyncWrite,
 {
     client_async_with_config(request, stream, None)
 }
@@ -89,12 +81,12 @@ pub fn client_async_with_config<'a, R, S>(
 ) -> ConnectAsync<S>
 where
     R: Into<Request<'a>>,
-    S: AsyncRead + AsyncWrite
+    S: AsyncRead + AsyncWrite,
 {
     ConnectAsync {
         inner: MidHandshake {
-            inner: Some(ClientHandshake::start(stream, request.into(), config).handshake())
+            inner: Some(ClientHandshake::start(stream, request.into(), config).handshake()),
-        }
+        },
     }
 }
 
@@ -154,8 +146,8 @@ where
 {
     AcceptAsync {
         inner: MidHandshake {
-            inner: Some(server::accept_hdr_with_config(stream, callback, config))
+            inner: Some(server::accept_hdr_with_config(stream, callback, config)),
-        }
+        },
     }
 }
 
@@ -175,11 +167,7 @@ pub struct WebSocketStream<S> {
 impl<S> WebSocketStream<S> {
     /// Convert a raw socket into a WebSocketStream without performing a
     /// handshake.
-    pub fn from_raw_socket(
+    pub fn from_raw_socket(stream: S, role: Role, config: Option<WebSocketConfig>) -> Self {
-        stream: S,
-        role: Role,
-        config: Option<WebSocketConfig>,
-    ) -> Self {
         Self::new(WebSocket::from_raw_socket(stream, role, config))
     }
 
@@ -195,20 +183,21 @@ impl<S> WebSocketStream<S> {
     }
 
     fn new(ws: WebSocket<S>) -> Self {
-        WebSocketStream {
+        WebSocketStream { inner: ws }
-            inner: ws,
-        }
     }
 }
 
-#[cfg(feature="stream")]
+#[cfg(feature = "stream")]
 impl<S: PeerAddr> PeerAddr for WebSocketStream<S> {
     fn peer_addr(&self) -> IoResult<SocketAddr> {
         self.inner.get_ref().peer_addr()
     }
 }
 
-impl<T> Stream for WebSocketStream<T> where T: AsyncRead + AsyncWrite {
+impl<T> Stream for WebSocketStream<T>
+where
+    T: AsyncRead + AsyncWrite,
+{
     type Item = Message;
     type Error = WsError;
 
@@ -219,12 +208,15 @@ impl<T> Stream for WebSocketStream<T> where T: AsyncRead + AsyncWrite {
             .to_async()
             .or_else(|err| match err {
                 WsError::ConnectionClosed => Ok(Async::Ready(None)),
-                err => Err(err)
+                err => Err(err),
             })
     }
 }
 
-impl<T> Sink for WebSocketStream<T> where T: AsyncRead + AsyncWrite {
+impl<T> Sink for WebSocketStream<T>
+where
+    T: AsyncRead + AsyncWrite,
+{
     type SinkItem = Message;
     type SinkError = WsError;
 
@@ -289,16 +281,14 @@ impl<H: HandshakeRole> Future for MidHandshake<H> {
         match self.inner.take().expect("cannot poll MidHandshake twice") {
             Ok(result) => Ok(Async::Ready(result)),
             Err(HandshakeError::Failure(e)) => Err(e),
-            Err(HandshakeError::Interrupted(s)) => {
+            Err(HandshakeError::Interrupted(s)) => match s.handshake() {
-                match s.handshake() {
                 Ok(result) => Ok(Async::Ready(result)),
                 Err(HandshakeError::Failure(e)) => Err(e),
                 Err(HandshakeError::Interrupted(s)) => {
                     self.inner = Some(Err(HandshakeError::Interrupted(s)));
                     Ok(Async::NotReady)
                 }
-                }
+            },
-            }
         }
     }
 }
@@ -339,8 +329,7 @@ impl ToStartSend for Result<(), WsError> {
                 WsError::Io(ref err) if err.kind() == ErrorKind::WouldBlock => Ok(AsyncSink::Ready),
                 WsError::SendQueueFull(msg) => Ok(AsyncSink::NotReady(msg)),
                 err => Err(err),
-            }
+            },
         }
     }
 }
-

src/stream.rs

@@ -4,12 +4,10 @@
 //! `native_tls` or `openssl` will work as long as there is a TLS stream supporting standard
 //! `Read + Write` traits.
 
-extern crate bytes;
+use std::io::{Error as IoError, Read, Result as IoResult, Write};
-
 use std::net::SocketAddr;
-use std::io::{Read, Write, Result as IoResult, Error as IoError};
 
-use self::bytes::{Buf, BufMut};
+use bytes::{Buf, BufMut};
 use futures::Poll;
 use tokio_io::{AsyncRead, AsyncWrite};
 

tests/handshakes.rs

@@ -1,13 +1,8 @@
-extern crate futures;
-extern crate tokio_tcp;
-extern crate tokio_tungstenite;
-extern crate url;
-
 use std::io;
 
 use futures::{Future, Stream};
-use tokio_tcp::{TcpStream, TcpListener};
+use tokio_tcp::{TcpListener, TcpStream};
-use tokio_tungstenite::{client_async, accept_async};
+use tokio_tungstenite::{accept_async, client_async};
 
 #[test]
 fn handshakes() {
@@ -24,9 +19,7 @@ fn handshakes() {
         let handshakes = connections.and_then(|connection| {
             accept_async(connection).map_err(|e| io::Error::new(io::ErrorKind::Other, e))
         });
-        let server = handshakes.for_each(|_| {
+        let server = handshakes.for_each(|_| Ok(()));
-            Ok(())
-        });
 
         server.wait().unwrap();
     });
@@ -38,8 +31,6 @@ fn handshakes() {
         let url = url::Url::parse("ws://localhost:12345/").unwrap();
         client_async(url, stream).map_err(|e| io::Error::new(io::ErrorKind::Other, e))
     });
-    let client = handshake.and_then(|_| {
+    let client = handshake.and_then(|_| Ok(()));
-        Ok(())
-    });
     client.wait().unwrap();
 }