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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { serve } from "../http/server.ts";
import {
acceptWebSocket,
isWebSocketCloseEvent,
isWebSocketPingEvent,
WebSocket
} from "./mod.ts";
/** websocket echo server */
const port = Deno.args[1] || "8080";
async function main(): Promise<void> {
console.log(`websocket server is running on :${port}`);
for await (const req of serve(`:${port}`)) {
const { headers, conn } = req;
acceptWebSocket({
conn,
headers,
bufReader: req.r,
bufWriter: req.w
})
.then(
async (sock: WebSocket): Promise<void> => {
console.log("socket connected!");
const it = sock.receive();
while (true) {
try {
const { done, value } = await it.next();
if (done) {
break;
}
const ev = value;
if (typeof ev === "string") {
// text message
console.log("ws:Text", ev);
await sock.send(ev);
} else if (ev instanceof Uint8Array) {
// binary message
console.log("ws:Binary", ev);
} else if (isWebSocketPingEvent(ev)) {
const [, body] = ev;
// ping
console.log("ws:Ping", body);
} else if (isWebSocketCloseEvent(ev)) {
// close
const { code, reason } = ev;
console.log("ws:Close", code, reason);
}
} catch (e) {
console.error(`failed to receive frame: ${e}`);
await sock.close(1000).catch(console.error);
}
}
}
)
.catch(
(err: Error): void => {
console.error(`failed to accept websocket: ${err}`);
}
);
}
}
if (import.meta.main) {
main();
}
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