added option for eventlistenerCount(max)

Author: vinodsr

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

@@ -103,6 +103,9 @@ var HttpProxy = exports.HttpProxy = function (options) {
     ? this.enable.xforward
     : true;
 
+  // if event listener is set then  use it else unlimited.
+  this.eventListenerCount = typeof options.eventListenerCount === 'number'? options.eventListenerCount : 0 ; 
+
   //
   // Setup additional options for WebSocket proxying. When forcing
   // the WebSocket handshake to change the `sec-websocket-location`
@@ -371,10 +374,9 @@ HttpProxy.prototype.proxyRequest = function (req, res, buffer) {
     res.on('drain', ondrain);
   });
 
-
   // allow unlimited listeners ... 
-  reverseProxy.setMaxListeners(0);
-  
+  reverseProxy.setMaxListeners(this.eventListenerCount);
+
   //
   // Handle 'error' events from the `reverseProxy`. Setup timeout override if needed
   //