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Ws websocket echo
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, maximum-scale=1, user-scalable=no"> | |
<title>WebSocketTest</title> | |
<style> | |
@font-face { font-family: 'Lato'; font-style: normal; font-weight: 300; src: local('Lato Light'), local('Lato-Light'), url(http://themes.googleusercontent.com/static/fonts/lato/v6/KT3KS9Aol4WfR6Vas8kNcg.woff) format('woff'); } | |
body { font: 130% 'Lato', sans-serif; color:#34495e; background: #ecf0f1; text-shadow: -1px 1px 1px rgba(0,0,0,0.3); padding: 1em 2em; } | |
#status { position: fixed; top: 0.2em; right: 0.5em } | |
</style> | |
</head> | |
<body> | |
<div id="main"> | |
<h1 id="topic">WebSocketTest</h1> | |
<input name="echo" id="echo" type="text" required /> | |
<button id="button">send</button> | |
<div id="messages"></div> | |
<span id="status">WebSocket: disconnected</span> | |
</div> | |
<script> | |
(function (D, window, undefined) { | |
'use strict'; | |
var status = D.getElementById('status'); | |
var echo = D.getElementById('echo'); | |
var messages = D.getElementById('messages'); | |
var button = D.getElementById('button'); | |
button.addEventlistener('click', function (e) { | |
e.preventDefault(); | |
var msg = echo.value; | |
if (msg !== '') return webSocketConnection.send(msg); | |
return false; | |
}); | |
var webSocketConnection = { | |
init: function () { | |
var self = this; | |
this.connection = new WebSocket(window.location.href.replace('http', 'ws')); | |
this.connection.onopen = function () { | |
status.innerText = 'WebSocket: connected'; | |
}; | |
this.connection.onerror = function (error) { | |
console.log(error); | |
self.connection.close(); | |
}; | |
this.connection.onclose = function () { | |
status.innerText = 'WebSocket: disconnected'; | |
setTimeout(self.init, 1000); | |
}; | |
this.connection.onmessage = function (message) { | |
var p = D.createElement('p'); | |
p.appendChild(D.createTextNode(message.data)); | |
messages.appendChild(p); | |
}; | |
}, | |
send: function (data) { | |
this.connection.send(data); | |
}, | |
close: function () { | |
this.connection.close(); | |
} | |
}; | |
webSocketConnection.init(); | |
}(document, window)); | |
</script> | |
</body> | |
</html> |
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'use strict'; | |
var express = require('express'); | |
var util = require('util'); | |
var app = express(); | |
var WebSocketServer = require('ws').Server; | |
var server = require('http').createServer(app).listen(8084); | |
app.use(express.static(__dirname + '/public')); | |
// set up the websocket server | |
var wss = new WebSocketServer( { server: server } ); | |
wss.clientConnections = {}; | |
wss.on('connection', function (connection) { | |
var cid = connection.upgradeReq.headers['sec-websocket-key']; | |
connection.id = cid; | |
this.clientConnections[cid] = setConnectionListeners(connection); | |
}); | |
// a function to set websocket connection eventlisteners and callbacks | |
function setConnectionListeners(connection) { | |
connection.on('message', function (msg) { | |
connection.send(msg); | |
}) | |
.on('error', function (error) { /*just catch it*/ }) | |
.on('close', function () { | |
delete wss.clientConnections[connection.id]; | |
}); | |
return connection; | |
} |
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