[fix] closes #555

Author: yawnt

lib/http-proxy/passes/web-incoming.js

@@ -108,7 +108,7 @@ web_o = Object.keys(web_o).map(function(pass) {
     proxyReq.on('error', function(err){
       if(options.buffer) { options.buffer.destroy(); }
       if (clb) {
-        clb(err);
+        clb(err, req, res);
       } else {
         server.emit('error', err, req, res);
       }

lib/http-proxy/passes/ws-incoming.js

@@ -108,7 +108,7 @@ var passes = exports;
 
     function onError(err) {
       if (clb) {
-        clb(err);
+        clb(err, req, socket);
       } else {
         server.emit('error', err, req, socket);
       }