Welcome to Frameworkless.js

By Mike Timofiiv

frameworkless.js -> Part 1

	// app.js
	const run = () => {
	console.log('Run, pump those crazy legs!')
	}

	run()

	// package.json
	{
	...
	"scripts": {
	"start": "nodemon --inspect -e js,html,hbs,sql,css,scss app.js"
	}
	...
	}

	// app.js
	require('dotenv').config()

	const { createServer } = require('http')

	const PORT = process.env.PORT \|\| 1234

	const server = createServer((request, response) => {
	return response.end('Look, this is the response!')
	})

	server.listen(PORT, () => {
	console.log(`We are running the server on port ${PORT}`)
	})

	// app.js
	require('dotenv').config()

	const { createServer } = require('http')

	const PORT = process.env.PORT \|\| 1234

	const server = createServer((request, response) => {
	return response.end('Look, this is the response!')
	})

	server.listen(PORT, () => {
	console.log(`We are running the server on port ${PORT}`)
	})

	// app.js
	const { createServer } = require('http')

	const PORT = 1234

	const server = createServer((request, response) => {
	return response.end('Look, this is the response!')
	})

	server.listen(PORT, () => {
	console.log(`We are running the server on port ${PORT}`)
	})

	// lib/responder.js
	const { open } = require('fs').promises

	const { STATIC_EXTENSIONS } = require('../config/constants')

	const serveStaticFile = async ({ file, extension, statusCode }, response) => {
	if (STATIC_EXTENSIONS.indexOf(extension) === -1) throw new Error('not_found')

	let fileHandle

	try {
	fileHandle = await open(`./public/${file}`, 'r')
	const staticFile = await fileHandle.readFile()

	return response.end(staticFile)
	} catch (error) {
	console.error(error)
	throw new Error('not_found')
	} finally {
	if (fileHandle) fileHandle.close()
	}
	}

	module.exports = serveStaticFile

	// initialisers/http.js
	if (!process.env.PORT) require('dotenv').config()

	const { createServer } = require('http')

	const serveStaticFile = require('../lib/responder')

	const { PORT, APP_NAME } = process.env

	module.exports = () => {
	const server = createServer(async ({ url }, response) => {
	const urlTokens = url.split('.')
	const extension = urlTokens.length > 1 ? `${urlTokens[urlTokens.length - 1].toLowerCase().trim()}` : false
	const isRoot = [ '', '/' ].indexOf(url) > -1
	const path = isRoot ? '/index.html' : url

	try {
	return await serveStaticFile({ file: path, extension: isRoot ? 'html' : extension }, response)
	} catch (error) {
	console.error(error)
	return await serveStaticFile({
	file: '/error.html',
	extension: 'html',
	statusCode: 500
	}, response)
	}
	})

	server.on('request', ({ method, url }) => {
	const now = new Date()
	console.info(`=> ${now.toUTCString()} – ${method} ${url}`)
	})

	server.listen(PORT, () => {
	console.log(`=> ${APP_NAME} running on port ${PORT}`)
	})
	}

	// lib/responder.js

	// line 2, at the top:
	const { lookup } = require('mime-types')

	// line 15, inside serveStaticFile's try block:
	const mime = lookup(extension)
	if (!mime) throw new Error('not_found')

	response.writeHead(statusCode \|\| 200, {
	'Content-Type': mime
	})

	$ mkdir remind.ist && cd remind.ist
	$ npm init

	# .env
	PORT=1234