index.js

'use strict';
const dotenv = require('dotenv');
if (!process.env.HEROKU_ENV){
  dotenv.config();

}  
   // in locale uso un file .env, recupero eventuali variabili d'ambiente in quel file
//verifica environment
if (!process.env.PORT) {
  console.error("\n\nERROR: No port specified! Verify that environment variable PORT exists!\n\n");
  process.exit(1);
}

if (!process.env.DATABASE_URL) {
  console.error("\n\nERROR: Can't find DATABASE_URL environment variable!\n\n");
  process.exit(1);
}

const fs = require('fs'),
      path = require('path'),
      http = require('http'),
      utils = require('./utils/writer.js');

const express = require('express'),
      app = express(),
      swaggerTools = require('swagger-tools');
const jsyaml = require('js-yaml'),
      serverPort = process.env.PORT;




// swaggerRouter configuration
var options = {
  swaggerUi: path.join(__dirname, '/swagger.json'),
  controllers: path.join(__dirname, './controllers'),
  useStubs: process.env.NODE_ENV === 'development' // Conditionally turn on stubs (mock mode)
};

var optionsUi = {
  swaggerUi: "/backend/swaggerui"
};
// The Swagger document (require it, build it programmatically, fetch it from a URL, ...)
var spec = fs.readFileSync(path.join(__dirname,'api/swagger.yaml'), 'utf8');
var swaggerDoc = jsyaml.safeLoad(spec);

//Salvo il file zip della repo e lo rendo disponibile staticamente



app.use('/backend/app.zip', express.static('app.zip'));



  swaggerTools.initializeMiddleware(swaggerDoc, function(middleware) {

    // Interpret Swagger resources and attach metadata to request - must be first in swagger-tools middleware chain
    app.use(middleware.swaggerMetadata());
  
    // Validate Swagger requests
    app.use(middleware.swaggerValidator());
  
    // Route validated requests to appropriate controller
    app.use(middleware.swaggerRouter(options));
  
    // Serve the Swagger documents and Swagger II
    app.use(middleware.swaggerUi(optionsUi));
  
    //Serve the static web pages
    app.use(express.static(path.join(__dirname, "./public")));
  
    //Serve statically the api specs and the documentation
    app.use('/backend/', express.static(path.join(__dirname, "./other/backend/")));
  
    //==============================================
    //Handle 404 errors. Leave this as last app.use()
    app.use(function(req, res, next) {
      console.log('404 error on ' + req.url);
      res.status(404);
  
      if (req.url.startsWith('/api')) {
        utils.writeJson(res, {
          message: "API endpoint not found!"
        }, 404);
      } else if (req.accepts('text/html')) {
        req.url = '/pages/404.html';
        app.handle(req, res);
      } else {
        res.send('404 Not Found');
      }
  
    });

// Start the server
    http.createServer(app).listen(serverPort, function() {
      console.log('\n');
      console.log('%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%');
      console.log('\n');
      console.log(' # Your server is listening on port %d (%s:%d)\n', serverPort, process.env.BASE_URL, serverPort);
      console.log(' # Swagger-ui is available at %s:%d/docs\n', process.env.BASE_URL, serverPort);
      console.log(' # Homepage is available at %s:%d/\n', process.env.BASE_URL, serverPort);
      console.log(' # Api specifications in YAML format are available at %s:%d/backend/spec.yaml', process.env.BASE_URL, serverPort);
      console.log('\n');
      console.log('%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%');
      console.log('\n');
    });
})