<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Websocket Chat Broker</title>
<style>
:root {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
font-size: 18px;
}
input[type='text'] {
font-size: inherit;
}
#log {
width: 30em;
height: 20em;
overflow: auto;
margin: 0.5em 0;
border: 1px solid black;
}
#status {
padding: 0 0.2em;
}
#text {
width: 17em;
padding: 0.5em;
}
.msg {
margin: 0;
padding: 0.25em 0.5em;
}
.msg--status {
/* a light yellow */
background-color: #ffffc9;
}
.msg--message {
/* a light blue */
background-color: #d2f4ff;
}
.msg--error {
background-color: pink;
}
</style>
</head>
<body>
<h1>Chat!</h1>
<div>
<button id="connect">Connect</button>
<span>Status:</span>
<span id="status">disconnected</span>
</div>
<div id="log"></div>
<form id="chatform">
<input type="text" id="text" />
<input type="submit" id="send" />
</form>
<hr />
<section>
<h2>Commands</h2>
<table style="border-spacing: 0.5em;">
<tr>
<td>
<code>/list</code>
</td>
<td>
list all available rooms
</td>
</tr>
<tr>
<td>
<code>/join name</code>
</td>
<td>
join room, if room does not exist, create new one
</td>
</tr>
<tr>
<td>
<code>/name name</code>
</td>
<td>
set session name
</td>
</tr>
<tr>
<td>
<code>some message</code>
</td>
<td>
just string, send message to all peers in same room
</td>
</tr>
</table>
</section>
<script>
const $status = document.querySelector('#status')
const $connectButton = document.querySelector('#connect')
const $log = document.querySelector('#log')
const $form = document.querySelector('#chatform')
const $input = document.querySelector('#text')
/** @type {WebSocket | null} */
var socket = null
function log(msg, type = 'status') {
$log.innerHTML += `<p class="msg msg--${type}">${msg}</p>`
$log.scrollTop += 1000
}
function connect() {
disconnect()
const { location } = window
const proto = location.protocol.startsWith('https') ? 'wss' : 'ws'
const wsUri = `${proto}://${location.host}/ws`
log('Connecting...')
socket = new WebSocket(wsUri)
socket.onopen = () => {
log('Connected')
updateConnectionStatus()
}
socket.onmessage = (ev) => {
log('Received: ' + ev.data, 'message')
}
socket.onclose = () => {
log('Disconnected')
socket = null
updateConnectionStatus()
}
}
function disconnect() {
if (socket) {
log('Disconnecting...')
socket.close()
socket = null
updateConnectionStatus()
}
}
function updateConnectionStatus() {
if (socket) {
$status.style.backgroundColor = 'transparent'
$status.style.color = 'green'
$status.textContent = `connected`
$connectButton.innerHTML = 'Disconnect'
$input.focus()
} else {
$status.style.backgroundColor = 'red'
$status.style.color = 'white'
$status.textContent = 'disconnected'
$connectButton.textContent = 'Connect'
}
}
$connectButton.addEventListener('click', () => {
if (socket) {
disconnect()
} else {
connect()
}
updateConnectionStatus()
})
$form.addEventListener('submit', (ev) => {
ev.preventDefault()
const text = $input.value
log('Sending: ' + text)
socket.send(text)
$input.value = ''
$input.focus()
})
updateConnectionStatus()
</script>
</body>
</html>