- Loome Vestlusruum Node projekt.
- Installime ws ja loome failid.
index.js:
JavaScript
const http = require('http');
const fs = require('fs');
const ws = new require('ws');
const wss = new ws.Server({noServer: true});
function accept(req, res) {
if (req.url === '/ws' && req.headers.upgrade &&
req.headers.upgrade.toLowerCase() === 'websocket' &&
req.headers.connection.match(/\bupgrade\b/i)
) {
wss.handleUpgrade(req, req.socket, Buffer.alloc(0), onSocketConnect);
} else if (req.url === '/') {
fs.createReadStream('./index.html').pipe(res);
} else {
res.writeHead(404);
res.end();
}
}
const clients = new Set();
function onSocketConnect(ws) {
clients.add(ws);
ws.on('message', function(message) {
message = message.slice(0, 50);
for(let client of clients) {client.send(message);}
});
ws.on('close', function() {
log(`connection closed`);
clients.delete(ws);
});
}
let log;
if (!module["parent"]) {
log = console.log;
http.createServer(accept).listen(8080);
} else {
log = function() {};
// log = console.log;
exports.accept = accept;
}index.html:
HTML
<!doctype html>
<form name="publish">
<input type="text" name="message" maxlength="50"/>
<input type="submit" value="Send"/>
</form>
<div id="messages"></div>
<script>
let url = location.host == 'localhost' ?
'ws://localhost:8080/ws' : location.host == 'javascript.local' ?
`ws://javascript.local/article/websocket/chat/ws` :
`wss://javascript.info/article/websocket/chat/ws`;
let socket = new WebSocket(url);
document.forms.publish.onsubmit = function() {
let outgoingMessage = this.message.value;
socket.send(outgoingMessage);
return false;
};
socket.onmessage = function(event) {
let incomingMessage = event.data;
showMessage(incomingMessage);
};
socket.onclose = event => console.log(`Closed ${event.code}`);
function showMessage(message) {
let messageElem = document.createElement('div');
messageElem.textContent = message;
document.getElementById('messages').prepend(messageElem);
}
</script>- Näeme et kasutajad saavad saada teadet
index.html‘st serverisse.
