fixed issue http-party#364 'proxyError' event emitted twice

Author: erasmospunk

lib/node-http-proxy/http-proxy.js

@@ -312,9 +312,14 @@ HttpProxy.prototype.proxyRequest = function (req, res, buffer) {
   // Handle 'error' events from the `reverseProxy`.
   //
   reverseProxy.once('error', proxyError);
-  reverseProxy.once('socket', function (socket) {
-    socket.once('error', proxyError);
-  });
+  //
+  // NOT needed as node.js re-emits the socket errors as ClientRequest 'error'
+  // Look for socketErrorListener references in
+  // https://github.com/joyent/node/blob/master/lib/http.js
+  //
+  // reverseProxy.once('socket', function (socket) {
+  //   socket.once('error', proxyError);
+  // });
 
   //
   // Handle 'error' events from the `req` (e.g. `Parse Error`).
@@ -719,8 +724,13 @@ HttpProxy.prototype.proxyWebSocketRequest = function (req, socket, head, buffer)
         return proxyError(ex);
       }
 
+      //
+      // NOT needed as node.js re-emits the socket errors as ClientRequest 'error'
+      // Look for socketErrorListener references in
+      // https://github.com/joyent/node/blob/master/lib/http.js
+      //
       // Catch socket errors
-      socket.on('error', proxyError);
+      //socket.on('error', proxyError);
 
       //
       // Remove data listener now that the 'handshake' is complete
@@ -729,10 +739,18 @@ HttpProxy.prototype.proxyWebSocketRequest = function (req, socket, head, buffer)
     });
   });
 
+  //
+  // Handle 'error' events from the `reverseProxy`.
+  //
   reverseProxy.on('error', proxyError);
-  reverseProxy.once('socket', function (socket) {
-    socket.once('error', proxyError);
-  });
+  //
+  // NOT needed as node.js re-emits the socket errors as ClientRequest 'error'
+  // Look for socketErrorListener references in
+  // https://github.com/joyent/node/blob/master/lib/http.js
+  //
+  // reverseProxy.once('socket', function (socket) {
+  //   socket.once('error', proxyError);
+  // });
 
   //
   // Handle 'error' events from the `req` (e.g. `Parse Error`).