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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Websocket client</title>
<script src="/static/jquery.min.js"></script>
<script type="text/javascript">
var websocket;
$(document).ready(init);
function init() {
if(!("WebSocket" in window)){
$('#status').append('<p><span style="color: red;">websockets are not supported </span></p>');
$("#navigation").hide();
} else {
$('#status').append('<p><span style="color: green;">websockets are supported </span></p>');
connect();
};
$("#connected").hide();
$("#content").hide();
};
function connect()
{
wsHost = $("#server").val()
websocket = new WebSocket(wsHost);
showScreen('<b>Connecting to: ' + wsHost + '</b>');
websocket.onopen = function(evt) { onOpen(evt) };
websocket.onclose = function(evt) { onClose(evt) };
websocket.onmessage = function(evt) { onMessage(evt) };
websocket.onerror = function(evt) { onError(evt) };
};
function disconnect() {
websocket.close();
};
function toggle_connection(){
if(websocket.readyState == websocket.OPEN){
disconnect();
} else {
connect();
};
};
function sendTxt() {
if(websocket.readyState == websocket.OPEN){
txt = $("#send_txt").val();
websocket.send(txt);
showScreen('sending: ' + txt);
} else {
showScreen('websocket is not connected');
};
};
function onOpen(evt) {
showScreen('<span style="color: green;">CONNECTED </span>');
$("#connected").fadeIn('slow');
$("#content").fadeIn('slow');
};
function onClose(evt) {
showScreen('<span style="color: red;">DISCONNECTED </span>');
};
function onMessage(evt) {
showScreen('<span style="color: blue;">RESPONSE: ' + evt.data+ '</span>');
};
function onError(evt) {
showScreen('<span style="color: red;">ERROR: ' + evt.data+ '</span>');
};
function showScreen(txt) {
$('#output').prepend('<p>' + txt + '</p>');
};
function clearScreen()
{
$('#output').html("");
};
</script>
</head>
<body>
<div id="header">
<h1>Websocket client</h1>
<div id="status"></div>
</div>
<div id="navigation">
<p id="connecting">
<input type='text' id="server" value="ws://localhost:8080/websocket"></input>
<button type="button" onclick="toggle_connection()">connection</button>
</p>
<div id="connected">
<p>
<input type='text' id="send_txt" value=></input>
<button type="button" onclick="sendTxt();">send</button>
</p>
</div>
<div id="content">
<button id="clear" onclick="clearScreen()" >Clear text</button>
<div id="output"></div>
</div>
</div>
</body>
</html>
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