minesweeper/backend/index.ts

76 lines
2.1 KiB
TypeScript

import { on } from "./events";
import { handleRequest } from "./router";
import promClient, { Histogram } from "prom-client";
const allowCors = {
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS",
"Access-Control-Allow-Headers": "Content-Type",
};
promClient.collectDefaultMetrics();
const requestDuration = new Histogram({
name: "request_duration",
help: "Request duration",
labelNames: ["action"],
});
const metricsUser = process.env.METRICS_USER;
const metricsPassword = process.env.METRICS_PASSWORD;
const server = Bun.serve({
async fetch(request: Request) {
if (request.method === "OPTIONS") {
const res = new Response("Departed", { headers: allowCors });
return res;
}
if (request.url.endsWith("ws")) {
if (server.upgrade(request)) return new Response("ok");
}
if (request.url.endsWith("metrics")) {
const [type, auth] =
request.headers.get("Authorization")?.split(" ") ?? [];
const [user, password] = Buffer.from(auth, "base64")
.toString("utf-8")
.split(":");
if (
type !== "Basic" ||
user !== metricsUser ||
password !== metricsPassword
) {
return new Response("Unauthorized", { status: 401 });
}
return new Response(await promClient.register.metrics());
}
return new Response("Not Found", { status: 404 });
},
websocket: {
message: (ws, message) => {
if (typeof message !== "string") {
return;
}
try {
const msg = JSON.parse(message);
console.log("Received message", msg);
const start = Date.now();
handleRequest(msg, ws);
const duration = Date.now() - start;
requestDuration.observe({ action: msg.type }, duration);
} catch (e) {
console.error("Faulty request", message, e);
return;
}
},
open: async (ws) => {
ws.subscribe("minesweeper-global");
},
},
port: 8072,
});
on((event) => {
server.publish("minesweeper-global", JSON.stringify(event));
});
console.log("Listening on port 8072");