Close connections on server.close(), and call onError on early connection close.

runtime/bin/http_impl.dart

Index: runtime/bin/http_impl.dart
===================================================================
--- runtime/bin/http_impl.dart	(revision 5451)
+++ runtime/bin/http_impl.dart	(working copy)
@@ -626,7 +626,13 @@
     _server.onConnection = onConnection;
   }
 
-  void close() => _server.close();
+  void close() {
+    _server.close();
+    for (_HttpConnection connection in _connections) {
+      connection._socket.close();
+    }
+  }
+
   int get port() => _server.port;
 
   void set onError(void handler(String errorMessage)) {
@@ -887,6 +893,7 @@
     _httpParser.headersComplete = () => _onHeadersComplete();
     _httpParser.dataReceived = (data) => _onDataReceived(data);
     _httpParser.dataEnd = () => _onDataEnd();
+    onDisconnect = _onDisconnected;
   }
 
   HttpClientRequest open(String method, String uri) {
@@ -917,6 +924,7 @@
   }
 
   void _onDataEnd() {
+    onDisconnect = null;
     if (_response.headers["connection"] == "close") {
       _socket.close();
     } else {
@@ -935,6 +943,14 @@
     _onResponse = handler;
   }
 
+  void _onDisconnected() {
+    if (_onErrorCallback !== null) {
+      _onErrorCallback(new HttpException(
+          "Client disconnected before response was received."));
+    }
+  }
+
+
   Function _onRequest;
   Function _onResponse;