I have a node.js-app running on the same machine on port 8080 with different channels. The communication between my jQuery-site and my .NET endpoint works perfectly.
My Site:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>WebSocket-Test</title>
</head>
<body>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript" src="/socket.io/socket.io.js"></script>
<script type="text/javascript">
$(function() {
$('button').click(function() {
var socket = io.connect('http://localhost:4000');
socket.on($('#username').val(), function (data) {
console.log(data);
socket.emit('my other event', { my: data });
});
});
});
</script>
<input type="text" id="username" />
<button>connect</button>
</body>
</html>
My node.js-server:
var app = require('http').createServer(handler)
, io = require('socket.io').listen(app)
, fs = require('fs')
app.listen(4000);
var count = 0;
function handler (req, res) {
fs.readFile(__dirname + '/index.html',
function (err, data) {
if (err) {
res.writeHead(500);
return res.end('Error loading index.html');
}
res.writeHead(200);
res.end(data);
});
}
io.sockets.on('connection', function (socket) {
setInterval(function () {
socket.emit('daniel', { hello: 'Waited two seconds!'});
}, 2000);
socket.emit('daniel', { hello: 'world' });
socket.emit('stefan', { hello: 'world2' });
socket.on('my other event', function (data) {
console.log(data);
});
});
My question is, how can I emmit a message from my .NET backend via node.js?
After my page is loaded I do have a window.io-object. What is the best approach? Just do an eval on the io-object with emmit and the channel or can I pass an object or json-thing to my node.js-server?
My target is, to send an event-driven message. When a new row is inserted into my MSQL-DB a message should be send to the channels.
One thing that you can do, is simply ping the Node.js server when there's an update with the details. You can do this over straight http/https.
Basically, when .NET updates the db, it can fire off a quick POST to a node.js endpoint with the data package that you want to roll out to users.