UPDATE: add missing server.js file.

SimpleVideoChat/server.js

@@ -0,0 +1,23 @@
+var WebSocketServer = require('ws').Server,
+    wss = new WebSocketServer({port: 3434});
+
+/** broadcast message to all clients **/
+wss.broadcast = function (data) {
+  var i = 0, n = this.clients ? this.clients.length : 0, client = null;
+  for (; i < n; i++) {
+    client = this.clients[i];
+    if (client.readyState === client.OPEN) {
+      client.send(data);
+    }
+    else console.error('Error: the client state is ' + client.readyState);
+  }
+};
+
+/** successful connection */
+wss.on('connection', function (ws) {
+  /** incomming message */
+  ws.on('message', function (message) {
+    /** broadcast message to all clients */
+    wss.broadcast(message);
+  });
+});