Puro Server - Node.js

server.js

'use strict'

const fs = require('fs')
const path = require('path')
const http = require('http')
const url = require('url')
const crypto = require('crypto')
const mimeTypes = require('mime-types')
const debug = require('debug')

const porta = process.env.PORT || 3032
const error = debug('site:error')
const log = debug('site:log')
const www = path.join(__dirname, 'public')
const server = http.createServer()

server
	.on('request', (req, res) => {
		const u = url.parse(req.url)
		const data = []

		let file = u.pathname
		let contentType = mimeTypes.lookup(file)
		if (contentType === false) {
			file = `${file}.html`
			contentType = mimeTypes.lookup(file)
		}

		fs
			.createReadStream(path.join(www, file))
			.on('data', chunk => {
				data.push(chunk)
			})
			.on('end', () => {
				const buffer = Buffer.concat(data)
				const hash = crypto.createHash('sha256').update(buffer.toString('hex')).digest('hex')
				const header = {
					ETag: hash,
					'Cache-Control': 'public, no-cache',
					'Content-Type': contentType
				}
				res.writeHead(200, header)
				res.write(buffer)
				res.end()
			})
			.on('error', err => {
				error(err.message)
				fs.createReadStream(path.join(www, '404.html')).pipe(res)
			})
	})
	.on('error', (err, socket) => {
		error(err.message)
		socket.end('HTTP/1.1 400 Bad Request\r\n\r\n')
	})
	.listen(porta, () => {
		log(porta)
	})