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A Node.js http long polling server for HTTP streaming.
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| <!DOCTYPE html> | |
| <html> | |
| <style type="text/css"> | |
| body { | |
| font-size: 18px; | |
| background: #000; | |
| color: #fff; | |
| } | |
| #container { | |
| width: 600px; | |
| margin: 100px auto; | |
| } | |
| </style> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <title>Demo</title> | |
| <script type="text/javascript" src="http://code.jquery.com/jquery-1.5.min.js"></script> | |
| </head><body> | |
| <div id="container"> | |
| <h1>Demo</h1> | |
| <h2>Results will appear here:</h2> | |
| <ul id="results"> | |
| </ul> | |
| </div> | |
| <script> | |
| $.ajaxSetup({headers: {'x-stream': 'rockon'}}); | |
| $(function ($) { | |
| function longPoll () { | |
| $.get('http://localhost:8080', function (data) { | |
| console.log(data); | |
| $('<li>' + data + '</li>').appendTo('#results'); | |
| longPoll(); | |
| }); | |
| } | |
| longPoll(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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| var http = require('http'); | |
| var fs = require('fs'); | |
| var handleStatic, handleStream; | |
| // An array where we will keep pointers to all our connections. | |
| var connections = []; | |
| // Main HTTP request handler | |
| function handler(req, res) { | |
| // If we get our custom header, do streaming, if not; return the html file. | |
| if (req.headers['x-stream'] === 'rockon') { | |
| return handleStream(req, res); | |
| } | |
| handleStatic(req, res); | |
| } | |
| // Return the html file | |
| handleStatic = function (req, res) { | |
| // Asynchronous file read. | |
| fs.readFile('./long-polling.html', 'utf8', function (err, data) { | |
| if (err) throw err; | |
| // If there is no error, send the contents of the html file as the HTTP body | |
| res.writeHead(200, {'Content-Type': 'text/html'}); | |
| res.end(data); | |
| }); | |
| } | |
| // Handle a long polling request | |
| handleStream = function (req, res) { | |
| // Don't respond the the request, just stash it in the array. | |
| connections.push(res); | |
| // Notice that our array will eventually blow out through memory because it never | |
| // is pruned, and keeps a pointer to every connection ever made to this server. | |
| } | |
| var server = http.createServer(handler); | |
| process.stdin.resume(); | |
| process.stdin.setEncoding('utf8'); | |
| // When input on stdin is observed, send it to each of the connected clients. | |
| process.stdin.on('data', function (data) { | |
| connections.forEach(function (res) { | |
| res.writeHead(200, {'Content-Type': 'text/plain'}); | |
| res.end(data); | |
| }); | |
| }); | |
| // Fire up the server | |
| server.listen(8080, 'localhost', function () { | |
| console.log('server running'); | |
| }); |
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