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stream.Readable returns data on first read call even it first should buffer
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var util = require('util'); | |
var http = require('http'); | |
var stream = require('stream'); | |
var crypto = require('crypto'); | |
var server = http.createServer(); | |
server.on('request', function(request, response) { | |
response.writeHead(200, { "Content-Type": "text/plain" }); | |
response.end('Hello World\n'); | |
}); | |
server.on('upgrade', function(request, socket) { | |
var key = request.headers['sec-websocket-key']; | |
var accept = generateAccept(key); | |
socket.write(util.format( | |
'HTTP/1.1 101 Switching Protocols\r\n' + | |
'Upgrade: websocket\r\n' + | |
'Connection: upgrade\r\n' + | |
'Sec-WebSocket-Accept: %s\r\n' + | |
'Sec-WebSocket-Version: 13\r\n' + | |
'\r\n', accept)); | |
var wsstream = new stream.Readable(); | |
console.log(wsstream); | |
wsstream._read = function() { | |
var chunk = socket.read(); | |
if (chunk === null) | |
return this.push(''); | |
this.push(chunk); | |
}; | |
wsstream.on('readable', function() { | |
console.log('stream', wsstream.read()); | |
}); | |
console.log(wsstream); | |
socket.on('readable', function() { | |
// using wsstream.read() would return all data here | |
console.log('socket', wsstream.read(0)); | |
}); | |
}); | |
server.listen(3000); | |
function generateAccept(key) { | |
var GUID = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'; | |
return crypto.createHash('sha1').update(key.trim() + GUID).digest('base64'); | |
} |
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To use it run
node stream.js
and open a WebBrowser with console. In the console you type in:var ws = new WebSocket('ws://localhost:3000');
now you can send frames as you like with:
ws.send('some text message');