generator-express-no-stress/app/templates/server/common/server.js

Awesome APIs with ExpressJS and OpenAPI/Swagger: Features automatic request validation, interactive api doc, and more.

import Express from 'express';
import * as path from 'path';
import * as bodyParser from 'body-parser';
import * as http from 'http';
import * as os from 'os';
import cookieParser from 'cookie-parser';
<% if (specification === 'openapi_3') { %>
import { OpenApiValidator } from 'express-openapi-validator';
import errorHandler from '../api/middlewares/error.handler';
<% } else { %>
import swaggerify from './swagger';
<% } %>
import l from './logger';

const app = new Express();

export default class ExpressServer {
  constructor() {
    const root = path.normalize(`${__dirname}/../..`);
    app.set('appPath', `${root}client`);
    app.use(bodyParser.json({ limit: process.env.REQUEST_LIMIT || '100kb' }));
    app.use(bodyParser.urlencoded({ extended: true, limit: process.env.REQUEST_LIMIT || '100kb' }));
    app.use(bodyParser.text({ limit: process.env.REQUEST_LIMIT || '100kb'}));
    app.use(cookieParser(process.env.SESSION_SECRET));
    app.use(Express.static(`${root}/public`));

    <% if (specification === 'openapi_3') { %>
    const apiSpec = path.join(__dirname, 'api.yml');
    const validateResponses = !!(
      process.env.OPENAPI_ENABLE_RESPONSE_VALIDATION &&
      process.env.OPENAPI_ENABLE_RESPONSE_VALIDATION.toLowerCase() === 'true'
    );
    app.use(process.env.OPENAPI_SPEC || '/spec', Express.static(apiSpec));
    new OpenApiValidator({
      apiSpec,
      validateResponses,
    }).install(app);
    <% } %>
  }

  router(routes) {
    <% if (specification === 'openapi_3') { %>
      routes(app);
      app.use(errorHandler);
    <% } else { %>
      swaggerify(app, routes);
    <% } %>
    return this;
  }

  listen(port = process.env.PORT) {
    const welcome = p => () => l.info(`up and running in ${process.env.NODE_ENV || 'development'} @: ${os.hostname()} on port: ${p}}`);
    http.createServer(app).listen(port, welcome(port));
    return app;
  }
}