Signal.IO

Signal.IO is a realtime application framewrork for building Web API based on WebSocket instead of HTTP.

var signal = require('signal.io');
var server = require('http').Server();
var io = signal(server);
 
io.connect('/', function(socket) {
  socket.on('get', function(req, res) {
    res.send('Hello World');
  });
});
 
server.listen(3000);

Installation

$ npm install signal.io

Features

• Built on Socket.IO v1.0
• Express inspired API and interface
• Namespace routing
• Bundled middlewares
• Easy broadcasting

Example

Server:

var signal = require('signal.io');
var server = require('http').Server();
var io = signal(server);
 
// set middlewares
io.use(signal.cookieParser());
io.use(signal.session('my secret'));
 
io.connect('/posts/:postId', function(socket) {
  socket.on('read', function(req, res) {
    var post = {id: req.params.postId, title: 'A post'};
    res.send(post);
  });
 
  socket.on('update', function(req, res) {
    var post = req.body;
    // do update ...
 
    // send back the result and broadcast it to all clients joined in the same namespace.
    res.broadcast.send(post);
  });
});
 
server.listen(3000);

Client:

Use Socket.IO as the client.

<script src="/signal.io/socket.io.js"></script>
<script>
var socket = io('http://localhost:3000/posts/10', {path: '/signal.io'});
socket.on('connect', function() {
  socket.emit('read', function(err, post) {
    console.log('Read a post', post);
  });
 
  var post = {title: 'Hello, World'}
  socket.emit('update', post, function(err, post) {
    console.log('Update result', post);
  });
 
  socket.on('update', function(post) {
    console.log('Received a result of other clients', post);
  });
});
</script> 

License

MIT