226 lines
7.3 KiB
JavaScript
226 lines
7.3 KiB
JavaScript
// code originally provided by tzlil
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require("dotenv").config();
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const os = require("os");
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//const { run } = require("../utils/image-runner.js");
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const { Worker } = require("worker_threads");
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const path = require("path");
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const net = require("net");
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const http = require("http");
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const start = process.hrtime();
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const log = (msg, jobNum) => {
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console.log(`[${process.hrtime(start)[1] / 1000000}${jobNum !== undefined ? `:${jobNum}` : ""}]\t ${msg}`);
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};
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class JobCache extends Map {
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set(key, value) {
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super.set(key, value);
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setTimeout(() => {
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if (super.has(key) && this.get(key) === value && value.data) super.delete(key);
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}, 300000); // delete jobs if not requested after 5 minutes
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}
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}
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const jobs = new JobCache();
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// Should look like UUID : { addr : "someaddr", port: someport, msg: "request" }
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const queue = [];
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// Array of UUIDs
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const { v4: uuidv4 } = require("uuid");
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const MAX_JOBS = process.env.JOBS !== "" && process.env.JOBS !== undefined ? parseInt(process.env.JOBS) : os.cpus().length * 4; // Completely arbitrary, should usually be some multiple of your amount of cores
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let jobAmount = 0;
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const acceptJob = (uuid, sock) => {
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jobAmount++;
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queue.shift();
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const job = jobs.get(uuid);
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return runJob({
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uuid: uuid,
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msg: job.msg,
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num: job.num
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}, sock).then(() => {
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log(`Job ${uuid} has finished`);
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}).catch((err) => {
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console.error(`Error on job ${uuid}:`, err);
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jobs.delete(uuid);
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sock.write(Buffer.concat([Buffer.from([0x2]), Buffer.from(uuid), Buffer.from(err.message)]));
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}).finally(() => {
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jobAmount--;
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if (queue.length > 0) {
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acceptJob(queue[0], sock);
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}
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});
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};
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const httpServer = http.createServer((req, res) => {
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if (req.method !== "GET") {
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res.statusCode = 405;
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return res.end("405 Method Not Allowed");
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}
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const reqUrl = new URL(req.url, `http://${req.headers.host}`);
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if (reqUrl.pathname === "/status") {
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log(`Sending server status to ${req.socket.remoteAddress}:${req.socket.remotePort} via HTTP`);
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return res.end(Buffer.from((MAX_JOBS - jobAmount).toString()));
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} else if (reqUrl.pathname === "/running") {
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log(`Sending currently running jobs to ${req.socket.remoteAddress}:${req.socket.remotePort} via HTTP`);
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const keys = jobs.keys();
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const newObject = { queued: queue.length, runningJobs: jobAmount, max: MAX_JOBS };
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for (const key of keys) {
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const validKeys = Object.keys(jobs.get(key)).filter((value) => value !== "addr" && value !== "port" && value !== "data" && value !== "ext");
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newObject[key] = {};
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for (const validKey of validKeys) {
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if (validKey === "msg") {
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newObject[key][validKey] = JSON.parse(jobs.get(key)[validKey]);
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} else {
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newObject[key][validKey] = jobs.get(key)[validKey];
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}
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}
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}
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return res.end(JSON.stringify(newObject));
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} else if (reqUrl.pathname === "/image") {
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if (!reqUrl.searchParams.has("id")) {
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res.statusCode = 400;
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return res.end("400 Bad Request");
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}
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const id = reqUrl.searchParams.get("id");
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if (!jobs.has(id)) {
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res.statusCode = 410;
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return res.end("410 Gone");
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}
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log(`Sending image data for job ${id} to ${req.socket.remoteAddress}:${req.socket.remotePort} via HTTP`);
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res.setHeader("ext", jobs.get(id).ext);
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const data = jobs.get(id).data;
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jobs.delete(id);
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return res.end(data, (err) => {
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if (err) console.error(err);
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});
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} else {
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res.statusCode = 404;
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return res.end("404 Not Found");
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}
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});
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httpServer.on("error", (e) => {
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console.error("An HTTP error occurred: ", e);
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});
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httpServer.listen(8081, () => {
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log("HTTP listening on port 8081");
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});
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const server = net.createServer((sock) => { // Create a TCP socket/server to listen to requests
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log(`TCP client ${sock.remoteAddress}:${sock.remotePort} has connected`);
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sock.on("error", (e) => {
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console.error(e);
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});
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sock.on("data", (msg) => {
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const opcode = msg.readUint8(0);
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const req = msg.toString().slice(1,msg.length);
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console.log(req);
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// 0x00 == Cancel job
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// 0x01 == Queue job
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if (opcode == 0x00) {
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delete queue[queue.indexOf(req) - 1];
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jobs.delete(req);
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} else if (opcode == 0x01) {
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const length = parseInt(req.slice(0, 1));
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const num = req.slice(1, length + 1);
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const obj = req.slice(length + 1);
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const job = { addr: sock.remoteAddress, port: sock.remotePort, msg: obj, num: jobAmount };
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const uuid = uuidv4();
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jobs.set(uuid, job);
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queue.push(uuid);
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const newBuffer = Buffer.concat([Buffer.from([0x00]), Buffer.from(uuid), Buffer.from(num)]);
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sock.write(newBuffer);
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if (jobAmount < MAX_JOBS) {
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log(`Got TCP request for job ${job.msg} with id ${uuid}`, job.num);
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acceptJob(uuid, sock);
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} else {
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log(`Got TCP request for job ${job.msg} with id ${uuid}, queued in position ${queue.indexOf(uuid)}`, job.num);
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}
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} else {
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log("Could not parse TCP message");
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}
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});
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sock.on("end", () => {
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log(`TCP client ${sock.remoteAddress}:${sock.remotePort} has disconnected`);
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});
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// handle ctrl+c and pm2 stop
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process.on("SIGINT", () => {
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console.log("SIGINT detected, shutting down...");
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for (const job of jobs.keys()) {
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const jobObject = jobs.get(job);
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if (jobObject.addr === sock.remoteAddress && jobObject.port === sock.remotePort) {
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jobs.delete(job);
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sock.write(Buffer.concat([Buffer.from([0x2]), Buffer.from(job), Buffer.from("Job ended prematurely (not really an error; just run your image job again)")]));
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}
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}
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process.exit(0);
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});
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});
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server.on("error", (e) => {
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console.error("A TCP error occurred: ", e);
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});
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server.listen(8080, () => {
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log("TCP listening on port 8080");
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});
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const runJob = (job, sock) => {
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return new Promise((resolve, reject) => {
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log(`Job ${job.uuid} starting...`, job.num);
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const object = JSON.parse(job.msg);
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// If the image has a path, it must also have a type
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if (object.path && !object.type) {
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reject(new TypeError("Unknown image type"));
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}
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const worker = new Worker(path.join(__dirname, "../utils/image-runner.js"), {
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workerData: object
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});
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const timeout = setTimeout(() => {
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worker.terminate();
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reject(new Error("Job timed out"));
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}, 900000);
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log(`Job ${job.uuid} started`, job.num);
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worker.once("message", (data) => {
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clearTimeout(timeout);
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log(`Sending result of job ${job.uuid} back to the bot`, job.num);
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const jobObject = jobs.get(job.uuid);
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jobObject.data = data.buffer;
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jobObject.ext = data.fileExtension;
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jobs.set(job.uuid, jobObject);
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sock.write(Buffer.concat([Buffer.from([0x1]), Buffer.from(job.uuid)]), (e) => {
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if (e) return reject(e);
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return resolve();
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});
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});
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worker.once("error", (e) => {
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clearTimeout(timeout);
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reject(e);
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});
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/*run(object).then((data) => {
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log(`Sending result of job ${job.uuid} back to the bot`, job.num);
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const jobObject = jobs.get(job.uuid);
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jobObject.data = data.buffer;
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jobObject.ext = data.fileExtension;
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jobs.set(job.uuid, jobObject);
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sock.write(Buffer.concat([Buffer.from([0x1]), Buffer.from(job.uuid)]), (e) => {
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if (e) return reject(e);
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return resolve();
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});
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}).catch(e => {
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reject(e);
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});*/
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});
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}; |