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50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
// Declare dependencies.
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const express = require('express')
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const bodyParser = require('body-parser')
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const mongoose = require('mongoose')
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require('dotenv').config()
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// Declare constants.
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const app = express()
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const defaultPort = 4000
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const designatedPort = process.env.PORT || defaultPort
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// Declare middlewares.
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app.use(bodyParser.json())
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// Enable the Cross Origin Resource Sharing (CORS).
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app.use(function(req, res, next) {
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res.header('Access-Control-Allow-Origin', '*')
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res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept, Authorization')
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res.header('Access-Control-Allow-Methods', 'PUT, POST, GET, DELETE, OPTIONS')
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next()
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})
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// Declare database connection.
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mongoose.connect(process.env.MONGODB_SRV, {
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useNewUrlParser:true,
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useCreateIndex: true,
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useUnifiedTopology: true
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})
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mongoose.connection.once('open', () => {
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console.log('Connection to MongoDB Atlas has been successfully tested.')
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}).catch(function(err) {
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console.log(err)
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})
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// Declare routes.
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app.use('/api', require('./routes'))
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// Listen to server requests.
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app.listen(designatedPort, () => {
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console.log('Node.js backend now online in port ' + designatedPort)
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}) |