fix(server): support HTTP/1.1 pipelining

src/http/conn.rs

@@ -117,11 +117,17 @@ impl<K: Key, T: Transport, H: MessageHandler<T>> ConnInner<K, T, H> {
     }
 
     fn parse(&mut self) -> ::Result<http::MessageHead<<<H as MessageHandler<T>>::Message as Http1Message>::Incoming>> {
-        let n = try!(self.buf.read_from(&mut self.transport));
+        match self.buf.read_from(&mut self.transport) {
-        if n == 0 {
+            Ok(0) => {
                 trace!("parse eof");
                 return Err(io::Error::new(io::ErrorKind::UnexpectedEof, "parse eof").into());
             }
+            Ok(_) => {},
+            Err(e) => match e.kind() {
+                io::ErrorKind::WouldBlock => {},
+                _ => return Err(e.into())
+            }
+        }
         match try!(http::parse::<<H as MessageHandler<T>>::Message, _>(self.buf.bytes())) {
             Some((head, len)) => {
                 trace!("parsed {} bytes out of {}", len, self.buf.len());
@@ -444,9 +450,9 @@ impl<K: Key, T: Transport, H: MessageHandler<T>> ConnInner<K, T, H> {
         state
     }
 
-    fn can_read_more(&self) -> bool {
+    fn can_read_more(&self, was_init: bool) -> bool {
         match self.state {
-            State::Init { .. } => false,
+            State::Init { .. } => !was_init && !self.buf.is_empty(),
             _ => !self.buf.is_empty()
         }
     }
@@ -549,6 +555,11 @@ impl<K: Key, T: Transport, H: MessageHandler<T>> Conn<K, T, H> {
             events
         };
 
+        let was_init = match self.0.state {
+            State::Init { .. } => true,
+            _ => false
+        };
+
         if events.is_readable() {
             self.0.on_readable(scope);
         }
@@ -570,7 +581,7 @@ impl<K: Key, T: Transport, H: MessageHandler<T>> Conn<K, T, H> {
             },
         };
 
-        if events.is_readable() && self.0.can_read_more() {
+        if events.is_readable() && self.0.can_read_more(was_init) {
             return self.ready(events, scope);
         }