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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { serve } from "../http/server.ts";
import {
acceptWebSocket,
isWebSocketCloseEvent,
isWebSocketPingEvent,
} from "./mod.ts";
if (import.meta.main) {
/** websocket echo server */
const port = Deno.args[0] || "8080";
console.log(`websocket server is running on :${port}`);
for await (const req of serve(`:${port}`)) {
const { conn, r: bufReader, w: bufWriter, headers } = req;
try {
const sock = await acceptWebSocket({
conn,
bufReader,
bufWriter,
headers,
});
console.log("socket connected!");
try {
for await (const ev of sock) {
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 (err) {
console.error(`failed to receive frame: ${err}`);
if (!sock.isClosed) {
await sock.close(1000).catch(console.error);
}
}
} catch (err) {
console.error(`failed to accept websocket: ${err}`);
await req.respond({ status: 400 });
}
}
}
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