Simple Chat Example▲
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<html>
<head>
<title>WebSocket Chat Client</title>
</head>
<body>
<h1>WebSocket Chat Client</h1>
<p>
Host: <input id="webSocketHost" type="text" value="localhost:1234"/>
</p>
<p>
<button onClick="initWebSocket();">Connect</button>
<button id="disconnectButton" onClick="stopWebSocket();" disabled>Disconnect</button>
<button onClick="checkSocket();">State</button>
</p>
<p>
<textarea id="debugTextArea" style="width:400px;height:200px;" readonly></textarea>
</p>
<p>
<input type="text" id="inputNick" value="nickname" />
<input type="text" id="inputText" onkeydown="if(event.keyCode==13)sendMessage();"/>
<button id="sendButton" onClick="sendMessage();" disabled>Send</button>
</p>
<script type="text/javascript">
var debugTextArea = document.getElementById("debugTextArea");
function debug(message) {
debugTextArea.value += message + "\n";
debugTextArea.scrollTop = debugTextArea.scrollHeight;
}
function sendMessage() {
var nickname = document.getElementById("inputNick").value;
var msg = document.getElementById("inputText").value;
var strToSend = nickname + ": " + msg;
if ( websocket != null )
{
document.getElementById("inputText").value = "";
websocket.send( strToSend );
console.log( "string sent :", '"'+strToSend+'"' );
debug(strToSend);
}
}
var websocket = null;
function initWebSocket() {
try {
if (typeof MozWebSocket == 'function')
WebSocket = MozWebSocket;
if ( websocket && websocket.readyState == 1 )
websocket.close();
var wsUri = "ws://" + document.getElementById("webSocketHost").value;
websocket = new WebSocket( wsUri );
websocket.onopen = function (evt) {
debug("CONNECTED");
document.getElementById("disconnectButton").disabled = false;
document.getElementById("sendButton").disabled = false;
};
websocket.onclose = function (evt) {
debug("DISCONNECTED");
document.getElementById("disconnectButton").disabled = true;
document.getElementById("sendButton").disabled = true;
};
websocket.onmessage = function (evt) {
console.log( "Message received :", evt.data );
debug( evt.data );
};
websocket.onerror = function (evt) {
debug('ERROR: ' + evt.data);
};
} catch (exception) {
debug('ERROR: ' + exception);
}
}
function stopWebSocket() {
if (websocket)
websocket.close();
}
function checkSocket() {
if (websocket != null) {
var stateStr;
switch (websocket.readyState) {
case 0: {
stateStr = "CONNECTING";
break;
}
case 1: {
stateStr = "OPEN";
break;
}
case 2: {
stateStr = "CLOSING";
break;
}
case 3: {
stateStr = "CLOSED";
break;
}
default: {
stateStr = "UNKNOW";
break;
}
}
debug("WebSocket state = " + websocket.readyState + " ( " + stateStr + " )");
} else {
debug("WebSocket is null");
}
}
</script>
</body>
</html>