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<html>
<head>
<title>WebSockets Load Test</title>
</head>
<body>
Host: <input id='host' style='width:100'>
Port: <input id='port' style='width:50'>
Encrypt: <input id='encrypt' type='checkbox'>
Send Delay (ms): <input id='sendDelay' style='width:50' value="100">
<input id='connectButton' type='button' value='Start' style='width:100px'
onclick="connect();">
<br><br>
<table border=1>
<tr>
<th align="right">Packets sent:</th>
<td align="right"><div id='sent'>0</div></td>
</tr><tr>
<th align="right">Good Packets Received:</th>
<td align="right"><div id='received'>0</div></td>
</tr><tr>
<th align="right">Errors (Bad Packets Received:)</th>
<td align="right"><div id='errors'>0</div></td>
</tr>
</table>
<br>
Errors:<br>
<textarea id="error" style="font-size: 9;" cols=80 rows=25></textarea>
</body>
<script>
function error(str) {
console.error(str);
cell = document.getElementById('error');
cell.innerHTML += errors + ": " + str + "\n";
cell.scrollTop = cell.scrollHeight;
}
var host = null, port = null, sendDelay = 0;
var ws = null, update_ref = null, send_ref = null;
var sent = 0, received = 0, errors = 0;
var max_send = 2000;
var recv_seq = 0, send_seq = 0;
Array.prototype.pushStr = function (str) {
var n = str.length;
for (var i=0; i < n; i++) {
this.push(str.charCodeAt(i));
}
}
function add (x,y) {
return parseInt(x,10)+parseInt(y,10);
}
function check_respond(data) {
//console.log(">> check_respond");
var first, last, str, length, chksum, nums, arr;
first = String.fromCharCode(data[0]);
last = String.fromCharCode(data[data.length-1]);
if (first != "^") {
errors++;
error("Packet missing start char '^'");
return;
}
if (last != "$") {
errors++;
error("Packet missing end char '$'");
return;
}
text = ''
for (var i = 1; i < data.length-1; i++) {
text += String.fromCharCode(data[i]);
}
arr = text.split(':');
seq = arr[0];
length = arr[1];
chksum = arr[2];
nums = arr[3];
//console.log(" length:" + length + " chksum:" + chksum + " nums:" + nums);
if (seq != recv_seq) {
errors++;
error("Expected seq " + recv_seq + " but got " + seq);
recv_seq = parseInt(seq,10) + 1; // Back on track
return;
}
recv_seq++;
if (nums.length != length) {
errors++;
error("Expected length " + length + " but got " + nums.length);
return;
}
//real_chksum = nums.reduce(add);
real_chksum = 0;
for (var i=0; i < nums.length; i++) {
real_chksum += parseInt(nums.charAt(i), 10);
}
if (real_chksum != chksum) {
errors++
error("Expected chksum " + chksum + " but real chksum is " + real_chksum);
return;
}
received++;
//console.log(" Packet checks out: length:" + length + " chksum:" + chksum);
//console.log("<< check_respond");
}
function send() {
var length = Math.floor(Math.random()*(max_send-9)) + 10; // 10 - max_send
var numlist = [], arr = [];
for (var i=0; i < length; i++) {
numlist.push( Math.floor(Math.random()*10) );
}
//chksum = numlist.reduce(add);
chksum = 0;
for (var i=0; i < numlist.length; i++) {
chksum += parseInt(numlist[i], 10);
}
var nums = numlist.join('');
arr.pushStr("^" + send_seq + ":" + length + ":" + chksum + ":" + nums + "$")
send_seq ++;
ws.send(new Uint8Array(arr));
sent++;
}
function update_stats() {
document.getElementById('sent').innerHTML = sent;
document.getElementById('received').innerHTML = received;
document.getElementById('errors').innerHTML = errors;
}
function init_ws() {
console.log(">> init_ws");
var scheme = "ws://";
if (document.getElementById('encrypt').checked) {
scheme = "wss://";
}
var uri = scheme + host + ":" + port;
console.log("connecting to " + uri);
ws = new WebSocket(uri);
ws.binaryType = 'arraybuffer';
ws.addEventListener('message', function(e) {
//console.log(">> WebSockets.onmessage");
arr = new Uint8Array(e.data);
check_respond(arr);
//console.log("<< WebSockets.onmessage");
});
ws.addEventListener('open', function() {
console.log(">> WebSockets.onopen");
send_ref = setInterval(send, sendDelay);
console.log("<< WebSockets.onopen");
});
ws.addEventListener('close', function(e) {
console.log(">> WebSockets.onclose");
clearInterval(send_ref);
console.log("<< WebSockets.onclose");
});
ws.addEventListener('error', function(e) {
console.log(">> WebSockets.onerror");
console.log(" " + e);
console.log("<< WebSockets.onerror");
});
console.log("<< init_ws");
}
function connect() {
console.log(">> connect");
host = document.getElementById('host').value;
port = document.getElementById('port').value;
sendDelay = parseInt(document.getElementById('sendDelay').value, 10);
if ((!host) || (!port)) {
console.log("must set host and port");
return;
}
if (ws) {
ws.close();
}
init_ws();
update_ref = setInterval(update_stats, 1);
document.getElementById('connectButton').value = "Stop";
document.getElementById('connectButton').onclick = disconnect;
console.log("<< connect");
}
function disconnect() {
console.log(">> disconnect");
if (ws) {
ws.close();
}
clearInterval(update_ref);
update_stats(); // Final numbers
recv_seq = 0;
send_seq = 0;
document.getElementById('connectButton').value = "Start";
document.getElementById('connectButton').onclick = connect;
console.log("<< disconnect");
}
window.onload = function() {
console.log("onload");
var url = document.location.href;
document.getElementById('host').value = (url.match(/host=([^&#]*)/) || ['',window.location.hostname])[1];
document.getElementById('port').value = (url.match(/port=([^&#]*)/) || ['',window.location.port])[1];
}
</script>
</html>
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