only triggering forum updated messaging if hostname matches, fixes #6333

public/src/app.js

@@ -75,7 +75,7 @@ app.cacheBuster = null;
 
 		socket.removeAllListeners('event:nodebb.ready');
 		socket.on('event:nodebb.ready', function (data) {
-			if (!app.cacheBuster || app.cacheBuster !== data['cache-buster']) {
+			if ((data.hostname === app.upstreamHost) && (!app.cacheBuster || app.cacheBuster !== data['cache-buster'])) {
 				app.cacheBuster = data['cache-buster'];
 
 				app.alert({

public/src/sockets.js

@@ -34,6 +34,10 @@ app.isConnected = false;
 		}
 	});
 
+	socket.on('setHostname', function (hostname) {
+		app.upstreamHost = hostname;
+	});
+
 	socket.on('event:banned', onEventBanned);
 
 	socket.on('event:alert', app.alert);

src/socket.io/index.js

@@ -1,5 +1,6 @@
 'use strict';
 
+var os = require('os');
 var async = require('async');
 var nconf = require('nconf');
 var winston = require('winston');
@@ -84,6 +85,7 @@ function onConnect(socket) {
 
 	socket.join('sess_' + socket.request.signedCookies[nconf.get('sessionKey')]);
 	io.sockets.sockets[socket.id].emit('checkSession', socket.uid);
+	io.sockets.sockets[socket.id].emit('setHostname', os.hostname());
 }
 
 function onMessage(socket, payload) {

src/webserver.js

@@ -3,6 +3,7 @@
 
 var fs = require('fs');
 var path = require('path');
+var os = require('os');
 var nconf = require('nconf');
 var express = require('express');
 var app = express();
@@ -72,6 +73,7 @@ module.exports.listen = function (callback) {
 
 			require('./socket.io').server.emit('event:nodebb.ready', {
 				'cache-buster': meta.config['cache-buster'],
+				hostname: os.hostname(),
 			});
 
 			plugins.fireHook('action:nodebb.ready');