Just to add to Ryan's comments...
If you do decide to use a modern web browser as your client (and you don't
care about Internet Exploder support) you can use SSEs. The beauty of using
SSE is that if your server goes down or a connection is lost the SSE client
will reconnect automatically:
require('http').createServer(function (req, res) {
if (req.headers.accept && req.headers.accept == 'text/event-stream') {
res.writeHead(200, {
'Content-Type': 'text/event-stream',
'Cache-Control': 'no-cache',
'Connection': 'keep-alive'
});
var id = 0;
setInterval(sse, 5000);
// or: process.nextTick(sse);
sse();
function sse() {
res.write('id: ' + ++id + '\n');
res.write("data: " + new Date().toUTCString() + '\n\n');
}
} else {
res.writeHead(200, { 'Content-Type': 'text/html' });
res.write('<!DOCTYPE html><html><head>' +
'<script>' +
'new
EventSource("/").addEventListener("message",function(event) {' +
'document.getElementById("sse").innerHTML=event.data' +
'});' +
'</script>' +
'</head><body><div id="sse">Waiting...</div></body></html>');
res.end();
}
}).listen(9080);
On Thursday, November 20, 2014 7:46:31 AM UTC-5, ryandesign wrote:
>
>
> On Nov 20, 2014, at 4:02 AM, Niral Kalavadia wrote:
>
> > Yes it is necessary for server to ask for data to client. This is the
> only mandatory need of my network. Is it possible to use node.js in this
> application?? Is node capable of sending request to multiple client at a
> time???
>
> Yes, and yes. You can write any code you want to, in most any language. :)
>
> If your server is an http server written in node, and your client is a
> modern web browser, then the already-mentioned socket.io library is a
> popular way to achieve this goal. If your client and server are not talking
> http to one another, if your client is not a modern web browser, then you
> may need a different library, or you may need to write the communication
> code yourself.
>
>
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