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Test how fast your browser handles websockets with Node.js.
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| var server = require( 'http' ).createServer(); | |
| // our html template | |
| var script = function( f ) { | |
| // get just the content of this script | |
| var s = /^[^\{]+\{\n?([\s\S]+)\}/.exec( f )[1]; | |
| return [ | |
| '<!DOCTYPE html><html>', | |
| '<head>', | |
| '<script type="text/javascript">',s,'</script>', | |
| '</head>', | |
| '<body style="font-size:40px"></body>', | |
| '</html>' | |
| ].join( '\n' ); | |
| } | |
| // some browser side javascript | |
| var makeWebSocket = ( function() { | |
| var ws = new WebSocket( 'ws://'+window.location.host ); | |
| var start; | |
| ws.addEventListener( 'open', function() { | |
| start = new Date().getTime(); | |
| this.send( '.' ); | |
| } ) | |
| var count = 0; | |
| ws.addEventListener( 'message', function( e ) { | |
| var end = new Date().getTime(); | |
| var diff = String( end - start ) | |
| if( diff >= 1000 ) { | |
| alert( 'Your browser can route'+count+'websocket requests per second' ); | |
| } | |
| else { | |
| this.send( e.data ); | |
| } | |
| count++; | |
| } ); | |
| } ) | |
| // send our page | |
| server.addListener( 'request', function( req, res ) { | |
| res.writeHead( 200 ); | |
| res.end( script( makeWebSocket ) ); | |
| } ) | |
| // create the most basic websocket imaginable | |
| server.addListener( 'upgrade', function( req, socket ) { | |
| socket.send = function( s ) { | |
| this.write( '\u0000', 'binary' ); | |
| this.write( s, 'utf8' ); | |
| this.write( '\uffff', 'binary' ); | |
| } | |
| socket.write( [ | |
| 'HTTP/1.1 101 Web Socket Protocol Handshake', | |
| 'Upgrade: WebSocket', | |
| 'Connection: Upgrade', | |
| 'WebSocket-Origin: '+req.headers.origin, | |
| 'WebSocket-Location: ws://'+req.headers.host+'/', | |
| null, null | |
| ].join( "\r\n" ) ); | |
| socket.addListener( 'data', function( s ) { | |
| var data = s.toString( 'utf8' ).slice( 1, -1 ); | |
| this.send( data ); | |
| } ); | |
| } ) | |
| server.listen( 3000 ); |
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