/
ws-server.ts
132 lines (119 loc) · 3.29 KB
/
ws-server.ts
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { serve } from 'https://deno.land/std/http/server.ts';
import {
acceptWebSocket,
isWebSocketCloseEvent,
isWebSocketPingEvent,
WebSocket,
} from 'https://deno.land/std/ws/mod.ts';
class User {
public id: number;
public name: string;
constructor(name = '') {
this.id = id++;
this.name = name;
}
}
const socks = new Map<number, WebSocket>();
let id = 0;
const users = new Map<number, User>();
async function handleWs(sock: WebSocket) {
try {
for await (const ev of sock) {
if (typeof ev === 'string') {
const req = parseJSON(ev);
switch (req.type) {
case 'register': {
const user = new User(req.name);
socks.set(user.id, sock);
users.set(user.id, user);
response(sock, req, { id: user.id, users: [...users.values()] });
broadcast({ type: 'online', user });
break;
}
case 'unregister': {
users.delete(req.id);
response(sock, req, { code: 200 });
broadcast({ type: 'offline', id: req.id });
break;
}
case 'update': {
const user = users.get(req.id);
if (user) {
user.name = req.name;
response(sock, req, { code: 200 });
broadcast({ type: 'update', user });
} else {
response(sock, req, { code: 404 });
}
break;
}
// 通信中转
case 'offer':
case 'answer':
case 'candidate': {
const targetSock = socks.get(req.toId);
response(sock, req, { code: targetSock ? 200 : 404 });
if (targetSock) {
delete req._t;
response(targetSock, null, req);
}
break;
}
}
} else if (isWebSocketCloseEvent(ev)) {
const { code, reason } = ev;
console.log('ws:Close', code, reason);
for (let id of socks.keys()) {
if (socks.get(id) === sock) {
socks.delete(id);
}
}
}
}
} catch (err) {
console.error(`failed to receive frame: ${err}`);
if (!sock.isClosed) {
await sock.close(1000).catch(console.error);
}
}
}
if (import.meta.main) {
/** websocket echo server */
const port = Deno.args[0] || '8081';
console.log(`websocket server is running on :${port}`);
for await (const req of serve(`:${port}`)) {
const { conn, r: bufReader, w: bufWriter, headers } = req;
acceptWebSocket({
conn,
bufReader,
bufWriter,
headers,
})
.then(handleWs)
.catch(async (err: any) => {
console.error(`failed to accept websocket: ${err}`);
await req.respond({ status: 400 });
});
}
}
function parseJSON(str: string) {
try {
return JSON.parse(str);
} catch (error) {
return {};
}
}
function broadcast(msg: Object) {
console.log('broadcast', msg);
socks.forEach(sock => response(sock, null, msg));
}
function response(sock: WebSocket, req: Object | null, msg: Object) {
try {
// @ts-ignore
if (req) msg._t = req._t;
sock.send(JSON.stringify(msg));
} catch (error) {
console.log('TCL: response -> error', error);
}
}