http: event upgrade, how to I send a response?

[kyogron]

Hi,

I want to implement a WebSocket server.

I am currently at the beginnings handling the HTTP Protocol upgrade handshake.

The handshake requires a response for security reasons unfortunately the "upgrade" event does not provide any response object or at least I cannot find one.

Is there an other way to response as a listener of the Event: 'upgrade' ?

Regards

[Fedor Indutny]

As you can see, 'upgrade' event listener receives `socket` object.

Try doing: socket.write('something').

Cheers,

Fedor.

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[kyogron]

Thanks for the quick response :)

var http = require('http');

var server = http.createServer();

server.on('request', function(req, res) {

    res.setHeader('Content-Type', 'text/plain');

    res.end('hello world');

});

server.on('upgrade', function(req, socket, head) {

    console.log('upgrading'); 

    socket.write('upgraded');

    socket.on('data', function() {

        console.log(arguments); 

    });

});

server.listen(3000);

in the chrome console:

var ws = new WebSocket('ws://localhost:3000);

ws.onopen = function() {

    ws.send('hello');

};

Except console.log('upgrading') there is no output at all.

The browser waits on a http response (it shows me pending and no response available).

The question is just how I could send one without a request obj supplied to the callback?

[Fedor Indutny]

Well, I'd recommend you to learn how http upgrade works and to learn details of websocket protocol. Without knowing this it'd be very hard for you to continue.

Cheers,

Fedor.

[mscdex]

kyogron, you might try using a node websocket module instead of doing
it yourself. Here's one: https://npmjs.org/package/ws

[Bodo Kaiser]

Now I know what to do:

You have to use socket.write("HTTP/1.1 101 Web Socket Protocol Handshake\r\n"...); actually it maybe also an idea to map the socket on a response object manually.

Am 05.01.2013 um 20:25 schrieb mscdex <msc...@gmail.com>:

kyogron, you might try using a node websocket module instead of doing
it yourself. Here's one: https://npmjs.org/package/ws