Do not close sockets for http connection fully before we are

runtime/bin/http_impl.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _HttpHeaders implements HttpHeaders {
   _HttpHeaders() : _headers = new Map<String, List<String>>();
 
   List<String> operator[](String name) {
     name = name.toLowerCase();
     return _headers[name];
@@ skipping 1332 matching lines @@
       if (_request != null && _request._streamErrorHandler != null) {
         _request._streamErrorHandler(e);
       }
       if (_response != null && _response._streamErrorHandler != null) {
         _response._streamErrorHandler(e);
       }
     }
 
     // If currently not processing any request just close the socket.
     if (_httpParser.isIdle) {
-      _destroy();
-      if (onClosed != null && e == null) {
-        // Don't call onClosed if onError has been called.
-        onClosed();
-      }
+      _socket.outputStream.onClosed = () {
+        _destroy();
+        if (onClosed != null && e == null) {
+          // Don't call onClosed if onError has been called.
+          onClosed();
+        }
+      };
       return;
     }
 
     // Processing a request.
     if (e == null) {
       // Indicate connection close to the HTTP parser.
       _httpParser.connectionClosed();
     }
   }
 
@@ skipping 28 matching lines @@
   }
 
   void _onDataEnd(bool close) {
     _request._onDataEnd();
   }
 
   void _responseDone() {
     // If the connection is closing then close the output stream to
     // fully close the socket.
     if (_closing) {
-      _socket.close();
+      _socket.outputStream.onClosed = () {
+        _socket.close();
+      };
     }
     _response = null;
   }
 
   HttpServer _server;
   HttpRequest _request;
   HttpResponse _response;
 
   // Callbacks.
   Function onRequestReceived;
@@ skipping 749 matching lines @@
 
 
 class _RedirectInfo implements RedirectInfo {
   const _RedirectInfo(int this.statusCode,
                       String this.method,
                       Uri this.location);
   final int statusCode;
   final String method;
   final Uri location;
 }