feat(server): Add hooks for HttpListener and HttpsListener to be started from existing listeners.

This allows Servers to be started on existing TcpListeners.

src/net.rs

@@ -51,12 +51,15 @@ impl<'a, N: NetworkListener + 'a> Iterator for NetworkConnections<'a, N> {
 pub trait NetworkStream: Read + Write + Any + Send + Typeable {
     /// Get the remote address of the underlying connection.
     fn peer_addr(&mut self) -> io::Result<SocketAddr>;
+
     /// Set the maximum time to wait for a read to complete.
     #[cfg(feature = "timeouts")]
     fn set_read_timeout(&self, dur: Option<Duration>) -> io::Result<()>;
+
     /// Set the maximum time to wait for a write to complete.
     #[cfg(feature = "timeouts")]
     fn set_write_timeout(&self, dur: Option<Duration>) -> io::Result<()>;
+
     /// This will be called when Stream should no longer be kept alive.
     #[inline]
     fn close(&mut self, _how: Shutdown) -> io::Result<()> {
@@ -66,9 +69,8 @@ pub trait NetworkStream: Read + Write + Any + Send + Typeable {
     // Unsure about name and implementation...
 
     #[doc(hidden)]
-    fn set_previous_response_expected_no_content(&mut self, _expected: bool) {
+    fn set_previous_response_expected_no_content(&mut self, _expected: bool) { }
 
-    }
     #[doc(hidden)]
     fn previous_response_expected_no_content(&self) -> bool {
         false
@@ -79,6 +81,7 @@ pub trait NetworkStream: Read + Write + Any + Send + Typeable {
 pub trait NetworkConnector {
     /// Type of Stream to create
     type Stream: Into<Box<NetworkStream + Send>>;
+
     /// Connect to a remote address.
     fn connect(&self, host: &str, port: u16, scheme: &str) -> ::Result<Self::Stream>;
 }
@@ -215,13 +218,17 @@ impl Clone for HttpListener {
     }
 }
 
-impl HttpListener {
+impl From<TcpListener> for HttpListener {
+    fn from(listener: TcpListener) -> HttpListener {
+        HttpListener(listener)
+    }
+}
 
+impl HttpListener {
     /// Start listening to an address over HTTP.
     pub fn new<To: ToSocketAddrs>(addr: To) -> ::Result<HttpListener> {
         Ok(HttpListener(try!(TcpListener::bind(addr))))
     }
-
 }
 
 impl NetworkListener for HttpListener {
@@ -499,7 +506,6 @@ pub struct HttpsListener<S: Ssl> {
 }
 
 impl<S: Ssl> HttpsListener<S> {
-
     /// Start listening to an address over HTTPS.
     pub fn new<To: ToSocketAddrs>(addr: To, ssl: S) -> ::Result<HttpsListener<S>> {
         HttpListener::new(addr).map(|l| HttpsListener {
@@ -508,6 +514,13 @@ impl<S: Ssl> HttpsListener<S> {
         })
     }
 
+    /// Construct an HttpsListener from a bound `TcpListener`.
+    pub fn with_listener(listener: HttpListener, ssl: S) -> HttpsListener<S> {
+        HttpsListener {
+            listener: listener,
+            ssl: ssl
+        }
+    }
 }
 
 impl<S: Ssl + Clone> NetworkListener for HttpsListener<S> {
@@ -576,7 +589,6 @@ mod openssl {
     use openssl::x509::X509FileType;
     use super::{NetworkStream, HttpStream};
 
-
     /// An implementation of `Ssl` for OpenSSL.
     ///
     /// # Example
@@ -678,7 +690,6 @@ mod tests {
 
         let mock = stream.downcast::<MockStream>().ok().unwrap();
         assert_eq!(mock, Box::new(MockStream::new()));
-
     }
 
     #[test]
@@ -688,6 +699,6 @@ mod tests {
 
         let mock = unsafe { stream.downcast_unchecked::<MockStream>() };
         assert_eq!(mock, Box::new(MockStream::new()));
+    }
+}
 
-    }
-}

src/server/listener.rs

@@ -42,7 +42,6 @@ impl<A: NetworkListener + Send + 'static> ListenerPool<A> {
 fn spawn_with<A, F>(supervisor: mpsc::Sender<()>, work: Arc<F>, mut acceptor: A)
 where A: NetworkListener + Send + 'static,
       F: Fn(<A as NetworkListener>::Stream) + Send + Sync + 'static {
-
     thread::spawn(move || {
         let _sentinel = Sentinel::new(supervisor, ());
 
@@ -77,3 +76,4 @@ impl<T: Send + 'static> Drop for Sentinel<T> {
         let _ = self.supervisor.send(self.value.take().unwrap());
     }
 }
+

src/server/mod.rs

@@ -194,8 +194,6 @@ impl<L: NetworkListener> Server<L> {
     pub fn set_write_timeout(&mut self, dur: Option<Duration>) {
         self.timeouts.write = dur;
     }
-
-
 }
 
 impl Server<HttpListener> {
@@ -219,6 +217,7 @@ impl<L: NetworkListener + Send + 'static> Server<L> {
     pub fn handle<H: Handler + 'static>(self, handler: H) -> ::Result<Listening> {
         self.handle_threads(handler, num_cpus::get() * 5 / 4)
     }
+
     /// Binds to a socket and starts handling connections with the provided
     /// number of threads.
     pub fn handle_threads<H: Handler + 'static>(self, handler: H,
@@ -228,8 +227,7 @@ impl<L: NetworkListener + Send + 'static> Server<L> {
 }
 
 fn handle<H, L>(mut server: Server<L>, handler: H, threads: usize) -> ::Result<Listening>
-where H: Handler + 'static,
+where H: Handler + 'static, L: NetworkListener + Send + 'static {
-L: NetworkListener + Send + 'static {
     let socket = try!(server.listener.local_addr());
 
     debug!("threads = {:?}", threads);
@@ -251,7 +249,6 @@ struct Worker<H: Handler + 'static> {
 }
 
 impl<H: Handler + 'static> Worker<H> {
-
     fn new(handler: H, timeouts: Timeouts) -> Worker<H> {
         Worker {
             handler: handler,
@@ -299,7 +296,6 @@ impl<H: Handler + 'static> Worker<H> {
         self.set_write_timeout(s, self.timeouts.write)
     }
 
-
     #[cfg(not(feature = "timeouts"))]
     fn set_write_timeout(&self, _s: &NetworkStream, _timeout: Option<Duration>) -> io::Result<()> {
         Ok(())
@@ -339,7 +335,6 @@ impl<H: Handler + 'static> Worker<H> {
             }
         };
 
-
         if !self.handle_expect(&req, wrt) {
             return false;
         }