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petermarks/chat.html

Created February 9, 2011 23:34
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Chat client
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chat.html
<html><head>
<title>WebSocket Chat</title>
<script type='text/javascript'>
if (!window.WebSocket)
alert("WebSocket not supported by this browser");
function $() { return document.getElementById(arguments[0]); }
function $F() { return document.getElementById(arguments[0]).value; }
function getKeyCode(ev) { if (window.event) return window.event.keyCode; return ev.keyCode; }
var room = {
join: function(name, host) {
this._username=name;
this._ws=new WebSocket(host);
this._ws.onopen=this._onopen;
this._ws.onmessage=this._onmessage;
this._ws.onclose=this._onclose;
},
_onopen: function(){
$('join').className='hidden';
$('joined').className='';
$('phrase').focus();
room._send(room._username);
},
_send: function(message){
if (this._ws)
this._ws.send(message);
},
chat: function(text) {
if (text != null && text.length>0 )
room._send(text);
},
_onmessage: function(m) {
if (m.data){
var c=m.data.indexOf(':');
var from=m.data.substring(0,c).replace('<','&lt;').replace('>','&gt;');
var text=m.data.substring(c+1).replace('<','&lt;').replace('>','&gt;');
var chat=$('chat');
var spanFrom = document.createElement('span');
spanFrom.className='from';
spanFrom.innerHTML=from+':&nbsp;';
var spanText = document.createElement('span');
spanText.className='text';
spanText.innerHTML=text;
var lineBreak = document.createElement('br');
chat.appendChild(spanFrom);
chat.appendChild(spanText);
chat.appendChild(lineBreak);
chat.scrollTop = chat.scrollHeight - chat.clientHeight;
}
},
_onclose: function(m) {
this._ws=null;
$('join').className='';
$('joined').className='hidden';
$('username').focus();
$('chat').innerHTML='';
}
};
</script>
<style type='text/css'>
div { border: 0px solid black; }
div#chat { clear: both; width: 40em; height: 20ex; overflow: auto; background-color: #f0f0f0; padding: 4px; border: 1px solid black; }
div#input { clear: both; width: 40em; padding: 4px; background-color: #e0e0e0; border: 1px solid black; border-top: 0px }
input#phrase { width:30em; background-color: #e0f0f0; }
input#username { width:14em; background-color: #e0f0f0; }
input#host { width:30em; background-color: #e0f0f0; }
div.hidden { display: none; }
span.from { font-weight: bold; }
span.alert { font-style: italic; }
</style>
</head><body>
<div id='chat'></div>
<div id='input'>
<div id='join' >
Username:&nbsp;<input id='username' type='text'/>&nbsp;&nbsp;&nbsp;
Host:&nbsp;<input id='host' type='text'/><input id='joinB' class='button' type='submit' name='join' value='Join'/>
</div>
<div id='joined' class='hidden'>
Chat:&nbsp;<input id='phrase' type='text'/>
<input id='sendB' class='button' type='submit' name='join' value='Send'/>
</div>
</div>
<script type='text/javascript'>
$('username').setAttribute('autocomplete','OFF');
$('host').setAttribute('autocomplete','OFF');
$('joinB').onclick = function(event) { room.join($F('username'), $F('host')); return false; };
$('phrase').setAttribute('autocomplete','OFF');
$('phrase').onkeyup = function(ev) { var keyc=getKeyCode(ev); if (keyc==13 || keyc==10) { room.chat($F('phrase')); $('phrase').value=''; return false; } return true; };
$('sendB').onclick = function(event) { room.chat($F('phrase')); $('phrase').value=''; return false; };
</script>
</body></html>
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