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data_latency_test.html
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data_latency_test.html
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<html>
<head>
<title>Simple WebRTC Data Channel Test</title>
</head>
<body>
<table width=100% height=100%>
<tr><td><h1>WebRTC DataChannel ping latency test</h1></td></tr>
<tr><td><div>
<button id="thebutton" onClick="start();">Start!</button>
<input type="number" id="ping_pace" value="1000">
<label for="ping_pace">Time between pings in ms</label>
</div></td></tr>
<tr><td>
Ping:<br>
avg= <div id="ping_results"></div>
last=<div id="ping_last"></div>
min= <div id="ping_min"></div>
max= <div id="ping_max"></div>
</td></tr>
<tr><td><div id="datawindow" style="
width: 100%;
height: 500px;
overflow: auto;
border: 1px solid red;"></div></td></tr>
<script type="application/javascript">
let button = document.getElementById("thebutton");
let ping_pace = document.getElementById("ping_pace");
let pc1;
let pc2;
let dc1;
let dc2;
let channel1;
let channel2;
let num_channels;
num_channels = 0;
var datachannels = new Array(0);
let pc1_offer;
let pc2_answer;
let min_ping = 100000;
let max_ping = 0
let total_pings = 0;
let num_pings = 0;
function log(msg) {
let div = document.getElementById("datawindow");
div.innerHTML = div.innerHTML + "<p>" + msg + "</p>";
}
var fancy_log = function(msg,color) {
var pre = document.createElement("p");
var message = '<span style="color: ' + color + ';">' + msg + '</span>';
pre.style.wordWrap = "break-word";
pre.innerHTML = message;
datawindow.appendChild(pre); // (window).* here doesn't work right
pre.scrollIntoView(false);
};
function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;
if (keycode == 13) {
myfield.form.submit();
return false;
} else {
return true;
}
}
function update_ping(ping) {
last_ping = ping;
if (ping < min_ping) {
min_ping = ping;
}
if (ping > max_ping) {
max_ping = ping;
}
num_pings++;
total_pings += ping;
}
function display_pings() {
if (num_pings > 0) {
document.getElementById("ping_results").innerHTML = total_pings/num_pings;
document.getElementById("ping_last").innerHTML = last_ping;
document.getElementById("ping_min").innerHTML = min_ping;
document.getElementById("ping_max").innerHTML = max_ping;
}
setTimeout(display_pings, 1000);
}
function failed(code) {
log("Failure callback: " + code);
}
// pc1.createOffer finished, call pc1.setLocal
function step1(offer) {
pc1_offer = offer;
log("Offer: " + offer.sdp);
pc1.setLocalDescription(offer, step1_5, failed);
}
function step1_5() {
setTimeout(step2,0);
}
// pc1.setLocal finished, call pc2.setRemote
function step2() {
pc2 = new RTCPeerConnection();
pc2.ondatachannel = function(event) {
channel = event.channel;
log("pc2 onDataChannel [" +num_channels + "] = " + channel +
", stream=" + channel.stream + " id=" + channel.id +
", ordered=" + channel.ordered +
", label='" + channel.label + "'" +
", protocol='" + channel.protocol + "'");
datachannels[num_channels] = channel;
num_channels++;
channel.binaryType = "blob";
channel.onmessage = function(evt) {
let recv_time = performance.now();
setTimeout(function() { channel.send(performance.now()); }, ping_pace.value);
update_ping(recv_time - evt.data);
};
channel.onopen = function() {
log("*** pc2 onopen fired, sending to " + channel);
};
channel.onclose = function() {
log("*** pc2 onclose fired");
};
};
pc2.onconnection = function() {
log("pc2 onConnection ");
}
pc2.onclosedconnection = function() {
log("pc2 onClosedConnection ");
}
pc2.onaddstream = function(obj) {
log("pc2 got remote stream from pc1 " + obj.type);
}
pc1.onicecandidate = function(obj) {
if (obj.candidate) {
log("pc1 found ICE candidate: " + JSON.stringify(obj.candidate));
pc2.addIceCandidate(obj.candidate);
} else {
log("pc1 got end-of-candidates signal");
}
}
pc2.setRemoteDescription(pc1_offer, step3, failed);
};
// pc2.setRemote finished, call pc2.createAnswer
function step3() {
pc2.createAnswer(step4, failed);
}
// pc2.createAnswer finished, call pc2.setLocal
function step4(answer) {
pc2_answer = answer;
log("Answer: " + answer.sdp);
pc2.setLocalDescription(answer, step5, failed);
}
// pc2.setLocal finished, call pc1.setRemote
function step5() {
pc2.onicecandidate = function(obj) {
if (obj.candidate) {
log("pc2 found ICE candidate: " + JSON.stringify(obj.candidate));
pc1.addIceCandidate(obj.candidate);
} else {
log("pc2 got end-of-candidates signal");
}
}
pc1.setRemoteDescription(pc2_answer, step6, failed);
}
// pc1.setRemote finished, make a data channel
function step6() {
log("HIP HIP HOORAY");
}
function start() {
num_pings = 0;
total_pings = 0;
min_ping = 100000;
max_ping = 0;
button.innerHTML = "Stop!";
button.onclick = stop;
while (datawindow.firstChild) {
datawindow.removeChild(datawindow.firstChild);
}
pc1 = new RTCPeerConnection();
pc1.onaddstream = function(obj) {
log("pc1 got remote stream from pc2 " + obj.type);
}
pc1.ondatachannel = function(event) {
channel = event.channel;
// In case pc2 opens a channel
log("pc1 onDataChannel [" +num_channels + "] = " + channel +
", stream=" + channel.stream + " id=" + channel.id +
", ordered=" + channel.ordered +
", label='" + channel.label + "'" +
", protocol='" + channel.protocol + "'");
datachannels[num_channels] = channel;
num_channels++;
channel.onmessage = function(evt) {
log("received: " + evt.data);
}
channel.onopen = function() {
log("pc1 onopen fired for " + channel);
}
channel.onclose = function() {
log("pc1 onclose fired");
};
}
pc1.onconnection = function() {
log("pc1 onConnection ");
}
pc1.onclosedconnection = function() {
log("pc1 onClosedConnection ");
}
dict = {}; // reliable (TCP-like)
dc1 = pc1.createDataChannel("This is pc1", dict);
channel = dc1;
log("pc1 label " + channel.label +
", stream=" + channel.stream + " id=" + channel.id);
channel.onmessage = function(evt) {
let recv_time = performance.now();
setTimeout(function() { channel.send(performance.now()); }, ping_pace.value);
update_ping(recv_time - evt.data);
}
channel.onopen = function() {
log("pc1 onopen fired for " + channel);
channel.send(performance.now());
}
channel.onclose = function() {
log("pc1 onclose fired");
};
pc1.createOffer(step1, failed);
setTimeout(display_pings, 1000);
}
function stop() {
log("closed");
pc1.close();
pc2.close();
button.innerHTML = "Start!";
button.onclick = start;
}
</script>
</html>