medium-app.js

app.js

//app.js
// Constants
const MAX_CONTENT_LENGTH_ACCEPTED = 102400000
const COOKIESIGNSECRET = process.env.COOKIESIGNSECRET

// Core Modules
const express = require('express')
const bodyParser = require('body-parser')
const cookieParser = require('cookie-parser')

// Security Modules
const helmet = require('helmet')
const hpp = require('hpp')
const cors = require('cors')
const contentLength = require('express-content-length-validator')

// Controllers
const controllers = require('./controllers')
const controllerAuth = controllers.Auth

// Custom middleware
const middleware = require('./middleware')
const setReqSession = middleware.setReqSession
const reqResLog = middleware.reqResLog
const errorHandler = middleware.errorHandler

// Application Services
const app = express()
app.enable('trust proxy')

// Route Modules
const routes = require('./routes')

// Security Middleware
app.use(helmet())
app.use(hpp())
app.use(contentLength.validateMax({ max: MAX_CONTENT_LENGTH_ACCEPTED }))
app.use(cors())

// Custom Middleware Initialization
app.use(cookieParser(COOKIESIGNSECRET))
app.use(setReqSession) // cookieParser dependent
app.use(reqResLog)
app.use(bodyParser.json()) // Extract the data from the body of the request
app.use(bodyParser.urlencoded({ extended: true }))

// Route Processing
app.use('/api', routes)
app.get('/', controllerAuth.Redirect)

// A standard error handler
app.use(errorHandler)

module.exports = app