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<title>Web Socket</title>
<style>
#chat { width: 97%; }
.them { font-weight: bold; }
.them:before { content: 'them '; color: #bbb; font-size: 14px; }
.you { font-style: italic; }
.you:before { content: 'you '; color: #bbb; font-size: 14px; font-weight: bold; }
#log {
overflow: auto;
max-height: 300px;
list-style: none;
padding: 0;
/* margin: 0;*/
}
#log li {
border-top: 1px solid #ccc;
margin: 0;
padding: 10px 0;
}
</style>
<article>
<form>
<input type="text" id="chat" placeholder="type and press enter to chat" />
</form>
<p id="status">Not connected</p>
<p>Users connected: <span id="connected">0</span></p>
<p>To test, open two windows with Web Socket support, type a message above and press return.</p>
<p>The server side code is available here: <a href="http://github.com/remy/html5demos/tree/master/server/">node-web-socket &amp; server</a> (note that it runs on <a href="http://nodejs.org/" title="node.js">nodejs</a>)</p>
<ul id="log"></ul>
</article>
<script>
// let's invite Firefox to the party.
if (window.MozWebSocket) {
window.WebSocket = window.MozWebSocket;
}
function openConnection() {
// uses global 'conn' object
if (conn.readyState === undefined || conn.readyState > 1) {
conn = new WebSocket('wss://remy-ws.glitch.me/');
conn.onopen = function () {
state.className = 'success';
state.innerHTML = 'Socket open';
};
conn.onmessage = function (event) {
// console.log(event.data);
var message = event.data; //JSON.parse(event.data);
if (!(/^\d+$/).test(message)) {
log.innerHTML = '<li class="them">' + message.replace(/[<>&]/g, function (m) { return entities[m]; }) + '</li>' + log.innerHTML;
} else {
connected.innerHTML = message;
}
};
conn.onclose = function (event) {
state.className = 'fail';
state.innerHTML = 'Socket closed';
};
}
}
var connected = document.getElementById('connected'),
log = document.getElementById('log'),
chat = document.getElementById('chat'),
form = chat.form,
conn = {},
state = document.getElementById('status'),
entities = {
'<' : '&lt;',
'>' : '&gt;',
'&' : '&amp;'
};
if (window.WebSocket === undefined) {
state.innerHTML = 'Sockets not supported';
state.className = 'fail';
} else {
state.onclick = function () {
if (conn.readyState !== 1) {
conn.close();
setTimeout(function () {
openConnection();
}, 250);
}
};
addEvent(form, 'submit', function (event) {
event.preventDefault();
// if we're connected
if (conn.readyState === 1) {
conn.send(JSON.stringify(chat.value));
log.innerHTML = '<li class="you">' + chat.value.replace(/[<>&]/g, function (m) { return entities[m]; }) + '</li>' + log.innerHTML;
chat.value = '';
}
});
openConnection();
}
</script>