Testing…
</pre>
<!DOCTYPE html>
<meta charset="utf-8" />
<meta name="author" content="Eugenia Pérez, eugenia_perez@cuatrovientos.org">
<title>PSP I - Ex1 - WebSocket Test</title>
<script language="javascript" type="text/javascript">
//Global vars for websocket connection
var wsUri = "wss://echo.websocket.org/";
var output;
//Initialize WebSocket connection and event handlers
function init() {
output = document.getElementById("output");
testWebSocket();
}
//Inner method which manages the websocket lifecycle
function testWebSocket() {
websocket = new WebSocket(wsUri);
websocket.onopen = function(evt) { onOpen(evt) };
websocket.onclose = function(evt) { onClose(evt) };
websocket.onmessage = function(evt) { onMessage(evt) };
websocket.onerror = function(evt) { onError(evt) };
}
//Listen for the connection open event then call the writeToScreen function
function onOpen(evt) {
writeToScreen("CONNECTED");
doSend("WebSocket rocks");
}
//Listen for the close connection event then call the writeToScreen function
function onClose(evt) {
writeToScreen("DISCONNECTED");
}
//Listen for new messages arriving at the cliente then call the writeToScreen function
function onMessage(evt) {
writeToScreen('<span style="color: blue;">RESPONSE: ' + evt.data+'</span>');
websocket.close();
}
//Listen for connection error then call the writeToScreen function with a given style format text
function onError(evt) {
writeToScreen('<span style="color: red;">ERROR:</span> ' + evt.data);
}
//Send a message on the WebSocket
function doSend(message) {
writeToScreen("SENT: " + message);
websocket.send(message);
}
//Display logging information in the HTML document
function writeToScreen(message) {
var pre = document.createElement("p");
pre.style.wordWrap = "break-word";
pre.innerHTML = message;
output.appendChild(pre);
//Also log information on the javascript console
console.log(message);
}
//Start running the example through the given listener
window.addEventListener("load", init, false);
</script>
<h2>WebSocket Test</h2>
<div id="output"></div>
</html>
<pre>
by 