Server Sent Events for Node.js
With built in channels
Spec: http://dev.w3.org/html5/eventsource/
Install
npm install nsse
Usage
var ServerSent = require('nsse')
, http = require('http')
, os = require('os')
var server = http.createServer(function(req, res){
res.end('Server Sent Evetns')
})
server.listen(8100)
var ss = new ServerSent(server, /* { heartbeat: 5*1000 } */) // default for 10 secs
var channel = ss.of('/sse') // like socket.io
channel.on('connection', function (socket){
socket.event('firstevnt')
socket.end('end of event')
socket.event('test')
socket.write('this is a test')
socket.json({
serverDate: +new Date,
loadavg: os.loadavg()
})
socket.send('yetAnotherEvent', 'data for this event')
setInterval(function (){
socket.json({
serverDate: +new Date,
loadavg: os.loadavg()
})
}, 5000)
})Client:
<html>
<body>
<h1> Server Sent Evetns</h1>
<script type="text/javascript">
var source = new EventSource('/sse')
source.addEventListener('firstevnt', function (ping){
console.log('frst:', ping.data)
})
source.addEventListener('test', function (ev){
console.log('DATA:', JSON.parse(ev.data))
})
source.addEventListener('heartbeat', function (ev){
console.log('heartbeat ->', ev.data)
})
</script>
</body>
</html>Other libraries
- sse.js By Einar Otto Stangvik
- EventSource By Aslak Hellesøy
For the browser:
-- jQuery EventSource by Rick Waldron
License
Alejandro Morales (c) MIT 2012