import ApplicationComponent from "../ApplicationComponent"; import express, {Express, Router} from "express"; import {log, makeUniqueLogger} from "../Logger"; import {Server} from "http"; import compression from "compression"; import Middleware from "../Middleware"; import {Type} from "../Utils"; export default class ExpressAppComponent extends ApplicationComponent { private readonly addr: string; private readonly port: number; private server?: Server; private expressApp?: Express; public constructor(addr: string, port: number) { super(); this.addr = addr; this.port = port; } public async start(app: Express): Promise { this.server = app.listen(this.port, this.addr, () => { log.info(`Web server running on ${this.addr}:${this.port}.`); }); // Proxy app.set('trust proxy', 'loopback'); this.expressApp = app; } public async init(router: Router): Promise { router.use(express.json({ type: req => req.headers['content-type']?.match(/^application\/(.+\+)?json$/), })); router.use(express.urlencoded({ extended: true, })); // gzip router.use(compression()); router.use((req, res, next) => { req.log = makeUniqueLogger(); req.middlewares = []; req.as = (type: Type): M => { const middleware = req.middlewares.find(m => m.constructor === type); if (!middleware) throw new Error('Middleware ' + type.name + ' not present in this request.'); return middleware as M; }; next(); }); } public async stop(): Promise { const server = this.server; if (server) { await this.close('Webserver', callback => server.close(callback)); } } public getServer(): Server { if (!this.server) throw 'Server was not initialized.'; return this.server; } public getExpressApp(): Express { if (!this.expressApp) throw new Error('Express app not initialized.'); return this.expressApp; } }