130 lines
3.3 KiB
JavaScript
130 lines
3.3 KiB
JavaScript
import http from "http";
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import https from "https";
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import path from "path";
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import express from "express";
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import ws from "express-ws";
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import _ from "lodash";
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import * as api from "./api.js";
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import { aliases, langs } from "./langs.js";
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import { log } from "./util.js";
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const host = process.env.HOST || "localhost";
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const port = parseInt(process.env.PORT || "") || 6119;
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const tlsPort = parseInt(process.env.TLS_PORT || "") || 6120;
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const useTLS = process.env.TLS ? true : false;
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const analyticsEnabled = process.env.ANALYTICS ? true : false;
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const app = express();
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app.set("query parser", (qs) => new URLSearchParams(qs));
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app.set("view engine", "ejs");
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app.get("/", (_, res) => {
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if (Object.keys(langs).length > 0) {
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res.render(path.resolve("frontend/pages/index"), {
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langs,
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analyticsEnabled,
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});
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} else {
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res
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.status(503)
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.send("Encountered unexpected error while loading languages\n");
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}
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});
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for (const [lang, { aliases }] of Object.entries(langs)) {
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if (aliases) {
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for (const alias of aliases) {
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app.get(`/${_.escapeRegExp(alias)}`, (_, res) => {
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res.redirect(301, `/${lang}`);
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});
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}
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}
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}
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app.get("/:lang", (req, res) => {
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const lang = req.params.lang;
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const lowered = lang.toLowerCase();
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if (lowered !== lang) {
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res.redirect(301, `/${lowered}`);
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return;
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}
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const canonical = aliases[lang];
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if (!canonical) {
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res.status(404).send(`No such language: ${lang}\n`);
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} else if (canonical !== lang) {
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res.redirect(301, `/${canonical}`);
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return;
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}
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res.render(path.resolve("frontend/pages/app"), {
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config: langs[lang],
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analyticsEnabled,
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});
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});
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app.use("/css", express.static("frontend/styles"));
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app.use("/js", express.static("frontend/out"));
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function addWebsocket(baseApp, httpsServer) {
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const app = ws(baseApp, httpsServer).app;
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app.ws("/api/v1/ws", (ws, req) => {
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try {
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const lang = req.query.get("lang");
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if (!lang) {
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ws.send(
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JSON.stringify({
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event: "error",
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errorMessage: "No language specified",
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})
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);
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ws.close();
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} else if (!langs[lang]) {
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ws.send(
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JSON.stringify({
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event: "error",
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errorMessage: `No such language: ${lang}`,
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})
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);
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ws.close();
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} else {
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new api.Session(ws, lang, console.log).setup();
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}
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} catch (err) {
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log.error("Unexpected error while handling websocket:", err);
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}
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});
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return app;
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}
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if (useTLS) {
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const httpsServer = https.createServer(
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{
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key: Buffer.from(process.env.TLS_PRIVATE_KEY || "", "base64").toString(
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"ascii"
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),
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cert: Buffer.from(process.env.TLS_CERTIFICATE || "", "base64").toString(
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"ascii"
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),
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},
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app
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);
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addWebsocket(app, httpsServer);
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httpsServer.listen(tlsPort, host, () =>
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console.log(`Listening on https://${host}:${tlsPort}`)
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);
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const server = http
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.createServer((req, res) => {
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res.writeHead(301, {
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Location: "https://" + req.headers["host"] + req.url,
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});
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res.end();
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})
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.listen(port, host, () =>
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console.log(`Listening on http://${host}:${port}`)
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);
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} else {
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addWebsocket(app, undefined);
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const server = app.listen(port, host, () =>
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console.log(`Listening on http://${host}:${port}`)
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);
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}
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