updated to use settings

updated handler/SocketIORouter.js to use new setting
updated hooks/express.js to use new setting
updated utils/Settings.js to accept new setting
updated settings.json.template so new setting is present

settings.json.template

@@ -78,7 +78,10 @@
 
   /* Require authorization by a module, or a user with is_admin set, see below. */
   "requireAuthorization": false,
-
+  
+  /*when you use NginX or another proxy/ load-balancer set this to true*/
+  "trustProxy": false,
+  
   /* Users for basic authentication. is_admin = true gives access to /admin.
      If you do not uncomment this, /admin will not be available! */
   /*

src/node/handler/SocketIORouter.js

@@ -23,6 +23,7 @@ var ERR = require("async-stacktrace");
 var log4js = require('log4js');
 var messageLogger = log4js.getLogger("message");
 var securityManager = require("../db/SecurityManager");
+var settings = require('../utils/Settings');
 
 /**
  * Saves all components
@@ -55,12 +56,12 @@ exports.setSocketIO = function(_socket)
   
   socket.sockets.on('connection', function(client)
   {
-    if(client.handshake.headers['x-forwarded-for'] === undefined){
-      client.set('remoteAddress', client.handshake.address.address);
-    }
-    else{
-      client.set('remoteAddress', client.handshake.headers['x-forwarded-for']);
-    }
+    if(settings.trustProxy && client.handshake.headers['x-forwarded-for'] !== undefined){
+	  	client.set('remoteAddress', client.handshake.headers['x-forwarded-for']);
+  	}
+  	else{
+  		client.set('remoteAddress', client.handshake.address.address);
+  	}
     var clientAuthorized = false;
     
     //wrap the original send function to log the messages

src/node/hooks/express.js

@@ -75,6 +75,10 @@ exports.restartServer = function () {
     next();
   });
 
+  if(settings.trustProxy){
+    app.enable('trust proxy');
+  }
+  
   app.configure(function() {
     hooks.callAll("expressConfigure", {"app": app});
   });

src/node/utils/Settings.js

@@ -119,6 +119,11 @@ exports.logconfig = { appenders: [{ type: "console" }]};
 */
 exports.sessionKey = false;
 
+/*
+* Trust Proxy, whether or not trust the x-forwarded-for header.
+*/
+exports.trustProxy = false;
+
 /* This setting is used if you need authentication and/or
  * authorization. Note: /admin always requires authentication, and
  * either authorization by a module, or a user with is_admin set */