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<!DOCTYPE html>
<meta charset="utf-8" />
<html>
<head>
<script language="javascript" type="text/javascript">
var socket = null;
function log(msg) {
const logElem = document.getElementById("log");
const p = document.createElement("p");
p.textContent = msg;
logElem.appendChild(p);
logElem.scroll(0, logElem.scrollHeight);
}
function connect() {
disconnect();
socket = new WebSocket(document.getElementById("wsUri").value);
log("Connecting...");
socket.addEventListener("open", function() {
log("Connected.");
update_ui();
});
socket.addEventListener("message", function(e) {
log("Received: " + e.data);
});
socket.addEventListener("close", function() {
log("Disconnected.");
socket = null;
update_ui();
});
}
function disconnect() {
if (socket !== null) {
log("Disconnecting...");
socket.close();
socket = null;
update_ui();
}
}
function update_ui() {
const status = document.getElementById("status");
const connect = document.getElementById("connect");
if (socket === null) {
status.innerText = "disconnected";
connect.innerText = "Connect";
} else {
status.innerText = "connected (" + socket.protocol + ")";
connect.innerText = "Disconnect";
}
}
window.addEventListener("DOMContentLoaded", function() {
const protocol = (window.location.protocol=="https:" && "wss://" || "ws://");
document.getElementById("wsUri").value = protocol + (window.location.host || "localhost:8080");
document.getElementById("connect").addEventListener("click", function() {
if (socket == null) {
connect();
} else {
disconnect();
}
update_ui();
return false;
});
document.getElementById("send").addEventListener("click", function() {
const text = document.getElementById("text");
log("Sending: " + text.value);
socket.send(text.value);
text.value = "";
text.focus();
return false;
});
document.getElementById("text").addEventListener("keyup", function(e) {
if (e.keyCode === 13) {
document.getElementById("send").click();
return false;
}
});
});
</script>
</head>
<body>
<h3>Chat!</h3>
<div>
<input id="wsUri" type="text" />
<button id="connect">Connect</button> | Status:
<span id="status">disconnected</span>
</div>
<div id="log"
style="width:20em;height:15em;overflow:auto;border:1px solid black">
</div>
<form id="chatform" onsubmit="return false;">
<input id="text" type="text" />
<input id="send" type="button" value="Send" />
</form>
</body>
</html>
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