79 lines
2.1 KiB
TypeScript
79 lines
2.1 KiB
TypeScript
import { ServerWebSocket, serve } from "bun";
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import { uid, wait } from "./utils";
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type Client = { id: string };
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const port = 1234;
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const protocol = "http";
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const clients = new Map<string, ServerWebSocket<Client>>();
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const clientData = new Map<string, any>();
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serve<Client>({
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port,
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fetch: async (req, server) => {
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const reqUrl = new URL(req.url);
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if (reqUrl.searchParams.has("new")) {
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const upgraded = server.upgrade(req, { data: { id: uid() } });
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if (upgraded) return;
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else return new Response("Upgrade failed :(", { status: 500 });
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}
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console.log("user req:", req.url);
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const subdomain = reqUrl.hostname.split(".")[0];
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if (!clients.has(subdomain)) {
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console.log(`\x1b[31m${subdomain} not found \x1b[0m`);
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return new Response("client not found :(", { status: 404 });
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}
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// The magic: forward the req to the client
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const client = clients.get(subdomain)!;
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const { method, url, headers } = req;
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const path = new URL(url).pathname;
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client.send(JSON.stringify({ method, path, headers }));
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// Wait for the client to cache its response above
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await wait(1);
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let retries = 5;
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let res = clientData.get(subdomain);
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while (!res) {
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await wait(1000);
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retries--;
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res = clientData.get(subdomain);
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if (retries < 1) {
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console.log(`\x1b[31m${subdomain} not responding \x1b[0m`);
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return new Response("client not responding :(", { status: 500 });
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}
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}
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return new Response(res, { status: 200 });
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},
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websocket: {
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open(ws) {
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console.log("connecting to", ws.data.id);
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clients.set(ws.data.id, ws);
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ws.send(
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JSON.stringify({
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id: ws.data.id,
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url: `${protocol}://${ws.data.id}.localhost:${port}`,
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})
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);
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},
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message(ws, message) {
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console.log("message from", ws.data.id, message);
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clientData.set(ws.data.id, message);
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},
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close(ws) {
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console.log(`closing ${ws.data.id}`);
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clients.delete(ws.data.id);
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},
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},
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});
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console.log(`Websocket server on port ${port}`);
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