node.js and socket.io

Question

I have created a small server for communication using node.js and socket io

Server:

var express = require('/usr/local/lib/node_modules/express') var io = require('/usr/local/lib/node_modules/socket.io'); var server = express.createServer(); server.listen(8888,'localhost'); io = io.listen(server); io.of("namespace").on('connection', function(client){ client.emit("message",'connection successful'); client.on('message', function(m){ console.log("received message"+m); client.broadcast(m); }); });

Client:

<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Comet Test</title> <script src="http://localhost:8888/socket.io/socket.io.js" type="text/javascript"></script> </head> <body> <p><a id='customAlert' href="#" onclick='sendMessage("customAlert")'>publish customAlert</a></p> <p><a id='customAlert2' href="#" onclick='sendMessage("customAlert2")'>publish customAl <script type="text/javascript"> // Start the socket var socket = io.connect('http://localhost:8888/namespace'); socket.on('error', function (reason){ console.error('Unable to connect Socket.IO', reason); }); socket.on('message', function(msg){ console.log(msg); }); function sendMessage(m) { console.log("sending message"+m); socket.emit("message",m); } </script> </body>

Communication does not happen, am I doing something wrong here?

Have you checked if io.connect is trying to connect to port 8888 on the server? — Nican
– Nican, Commented Oct 21, 2011 at 17:34

fourk · Accepted Answer · 2011-10-22 01:38:33Z

5

If your server is listening on port 8888, you need the client to connect to the server on port 8888.

The following line in your client code:

var socket = io.connect('http://localhost/namespace');

Should read:

 var socket = io.connect('http://localhost:8888/namespace');

answered Oct 22, 2011 at 1:38

fourk

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3 Comments

user160108 Over a year ago

the html file is accessed through apache, so should this create any issues.

user160108 Over a year ago

I have edited my code to include the new changes, now i start my server and when i open the html in the browser the server gets a client connect request and authorisation is successful, but when I try to send some messages the messages are lost and not caught by the server

fourk Over a year ago

You could try adding event listeners both server and client-side for both connection and disconnection events. This might give you a clearer picture of whether the connection is still alive when sending messages.

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