drorm · August 29, 2015 14:02 · Jun 6, 2014 · Jun 6, 2014 · Jun 6, 2014
diff --git a/package.json b/package.json
@@ -2,7 +2,7 @@
   "name": "node-chat",
   "version": "0.0.1",
   "dependencies": {
-    "express": "3.x",
+  "express": "^4.4.1",
     "socket.io": "latest"
   },
   "engines": {

diff --git a/proxy.js b/proxy.js
@@ -1,3 +1,4 @@
+//Chat from http://michieldemey.be/blog/node-js-and-socket-io-a-basic-chat-application-using-websockets/
 var http = require('http'),
     httpProxy = require('http-proxy'),
     express = require('express');

diff --git a/chat.html b/chat.html
@@ -0,0 +1,62 @@
+<html>
+<head>
+<script src="/socket.io/socket.io.js"></script>
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
+</head>
+<body>
+<script>
+        var URL = window.location.protocol + "//" + window.location.host;
+        console.log("Connecting to " + URL);
+        var socket = io.connect(URL);
+
+        // on connection to server, ask for user's name with an anonymous callback
+        socket.on('connect', function(){
+                // call the server-side function 'adduser' and send one parameter (value of prompt)
+                socket.emit('adduser', prompt("What's your name?"));
+        });
+
+        // listener, whenever the server emits 'updatechat', this updates the chat body
+        socket.on('updatechat', function (username, data) {
+                $('#conversation').append('<b>'+username + ':</b> ' + data + '<br>');
+        });
+
+        // listener, whenever the server emits 'updateusers', this updates the username list
+        socket.on('updateusers', function(data) {
+                $('#users').empty();
+                $.each(data, function(key, value) {
+                        $('#users').append('<div>' + key + '</div>');
+                });
+        });
+
+        // on load of page
+        $(function(){
+                // when the client clicks SEND
+                $('#datasend').click( function() {
+                        var message = $('#data').val();
+                        $('#data').val('');
+                        // tell server to execute 'sendchat' and send along one parameter
+                        socket.emit('sendchat', message);
+                });
+
+                // when the client hits ENTER on their keyboard
+                $('#data').keypress(function(e) {
+                        if(e.which == 13) {
+                                $(this).blur();
+                                $('#datasend').focus().click();
+                        }
+                });
+        });
+
+</script>
+<div style="float:left;width:100px;border-right:1px solid black;height:300px;padding:10px;overflow:scroll-y;">
+        <b>USERS</b>
+        <div id="users"></div>
+</div>
+<div style="float:left;width:300px;height:250px;overflow:scroll-y;padding:10px;">
+        <div id="conversation"></div>
+        <input id="data" style="width:200px;" />
+        <input type="button" id="datasend" value="send" />
+</div>
+
+</body>
+</html>
diff --git a/package.json b/package.json
@@ -0,0 +1,12 @@
+{
+  "name": "node-chat",
+  "version": "0.0.1",
+  "dependencies": {
+    "express": "3.x",
+    "socket.io": "latest"
+  },
+  "engines": {
+    "node": "0.8.x",
+    "npm": "1.1.x"
+  }
+}
diff --git a/proxy.js b/proxy.js
@@ -0,0 +1,28 @@
+var http = require('http'),
+    httpProxy = require('http-proxy'),
+    express = require('express');
+
+// create a server
+var app = express();
+var proxy = httpProxy.createProxyServer({ ws: true });
+
+// proxy HTTP GET / POST
+app.get('/socket.io/*', function(req, res) {
+  console.log("proxying GET request", req.url);
+  proxy.web(req, res, { target: 'http://localhost:8081'});
+});
+app.post('/socket.io/*', function(req, res) {
+  console.log("proxying POST request", req.url);
+  proxy.web(req, res, { target: 'http://localhost:8081'});
+});
+
+// Proxy websockets
+app.on('upgrade', function (req, socket, head) {
+  console.log("proxying upgrade request", req.url);
+  proxy.ws(req, socket, head);
+});
+
+// serve static content
+app.use('/', express.static(__dirname + "/public"));
+
+app.listen(8080);
diff --git a/server.js b/server.js
@@ -0,0 +1,48 @@
+var port = 5000;
+var app = require('express')();
+var server = require('http').createServer(app);
+var io = require('socket.io').listen(server);
+
+console.log("Listening on port " + port);
+server.listen(port);
+
+// routing
+app.get('/', function (req, res) {
+  res.sendfile(__dirname + '/chat.html');
+});
+
+// usernames which are currently connected to the chat
+var usernames = {};
+
+io.sockets.on('connection', function (socket) {
+
+        // when the client emits 'sendchat', this listens and executes
+        socket.on('sendchat', function (data) {
+                // we tell the client to execute 'updatechat' with 2 parameters
+                io.sockets.emit('updatechat', socket.username, data);
+        });
+
+        // when the client emits 'adduser', this listens and executes
+        socket.on('adduser', function(username){
+                // we store the username in the socket session for this client
+                socket.username = username;
+                // add the client's username to the global list
+                usernames[username] = username;
+                // echo to client they've connected
+                socket.emit('updatechat', 'SERVER', 'you have connected');
+                // echo globally (all clients) that a person has connected
+                socket.broadcast.emit('updatechat', 'SERVER', username + ' has connected');
+                // update the list of users in chat, client-side
+                io.sockets.emit('updateusers', usernames);
+        });
+
+        // when the user disconnects.. perform this
+        socket.on('disconnect', function(){
+                // remove the username from global usernames list
+                delete usernames[socket.username];
+                // update list of users in chat, client-side
+                io.sockets.emit('updateusers', usernames);
+                // echo globally that this client has left
+                socket.broadcast.emit('updatechat', 'SERVER', socket.username + ' has disconnected');
+        });
+});