nondanee/config.js

## config.js
const fs = require('fs')

/*
module.exports = {
	key: fs.readFileSync('domain.key'),
	cert: fs.readFileSync('fullchain.cer'),
}
*/

## index.js
#!/usr/bin/env node

const net = require('net')
const URL = require('url')
const http = require('http')
const https = require('https')
const config = require('./config')

const PORT = process.argv[2] || 8080
const CREDENTIALS = process.argv[3] || 'app:test'

const server = (config ? https : http).createServer(config).listen(PORT)

const close = socket => (socket.end(), socket.destroy())

const verify = (headers, socket) => {
    const token = (headers['proxy-authorization'] || '').slice(6)
    const credentials = (Buffer.from(token, 'base64')).toString()
    if (credentials === CREDENTIALS) return true
    socket.write('HTTP/1.1 407 Proxy Auth Required\r\nProxy-Authenticate: Basic realm="simple"\r\n\r\n')
}

const mock = (res) => {
    const headers = { 'Server': 'nginx', 'Content-Type': 'text/html' }
    const html = '<html>\n<head><title>404 Not Found</title></head>\n<body>\n<center><h1>404 Not Found</h1></center>\n<hr><center>nginx</center>\n</body>\n</html>\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n'
    res.writeHead(404, headers)
    res.end(html)
    return
}

const log = (...payload) => {
    if (!process.env.LOG) return
    console.log(...payload)
}

// MITM Mode
server.on('request', (req, res) => {
    const { method, url, headers, socket } = req
    if (!url.startsWith('http://')) return mock(res)
    if (!verify(headers, socket)) return close(socket)
    const target = URL.parse(url)
    log('MITM', '>', target.hostname)
    const proxyReq = http.request(Object.assign(target, { method, headers }))
        .on('response', proxyRes => {
            res.writeHead(proxyRes.statusCode, proxyRes.headers)
            proxyRes.pipe(res)
        })
        .on('error', () => close(socket))
    req.pipe(proxyReq).on('error', () => close(socket))
})

// Tunnel Mode
server.on('connect', (req, socket, head) => {
    const { url, headers } = req
    if (!verify(headers, socket)) return close(socket)
    const { port, hostname } = URL.parse('https://' + url)
    log('TUNNEL', '>', hostname)
    const proxySocket = net.connect(port, hostname)
        .on('connect', () => {
            socket.write('HTTP/1.1 200 Connection established\r\n\r\n')
            proxySocket.write(head)
            proxySocket.pipe(socket)
            socket.pipe(proxySocket)
        })
        .on('error', () => close(socket))
    socket.on('error', () => close(socket))
})

console.log(`Server ${CREDENTIALS} running @ ${server.cert ? 'https' : 'http'}://0.0.0.0:${PORT}`)

## package.json
{
	"name": "simple-proxy",
	"version": "0.1.3",
	"main": "index.js",
	"bin": "./index.js",
	"author": "nondanee"
}
	const fs = require('fs')

	/*
	module.exports = {
	key: fs.readFileSync('domain.key'),
	cert: fs.readFileSync('fullchain.cer'),
	}
	*/
	#!/usr/bin/env node

	const net = require('net')
	const URL = require('url')
	const http = require('http')
	const https = require('https')
	const config = require('./config')

	const PORT = process.argv[2] \|\| 8080
	const CREDENTIALS = process.argv[3] \|\| 'app:test'

	const server = (config ? https : http).createServer(config).listen(PORT)

	const close = socket => (socket.end(), socket.destroy())

	const verify = (headers, socket) => {
	const token = (headers['proxy-authorization'] \|\| '').slice(6)
	const credentials = (Buffer.from(token, 'base64')).toString()
	if (credentials === CREDENTIALS) return true
	socket.write('HTTP/1.1 407 Proxy Auth Required\r\nProxy-Authenticate: Basic realm="simple"\r\n\r\n')
	}

	const mock = (res) => {
	const headers = { 'Server': 'nginx', 'Content-Type': 'text/html' }
	const html = '<html>\n<head><title>404 Not Found</title></head>\n<body>\n<center><h1>404 Not Found</h1></center>\n<hr><center>nginx</center>\n</body>\n</html>\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n<!-- a padding to disable MSIE and Chrome friendly error page -->\n'
	res.writeHead(404, headers)
	res.end(html)
	return
	}

	const log = (...payload) => {
	if (!process.env.LOG) return
	console.log(...payload)
	}

	// MITM Mode
	server.on('request', (req, res) => {
	const { method, url, headers, socket } = req
	if (!url.startsWith('http://')) return mock(res)
	if (!verify(headers, socket)) return close(socket)
	const target = URL.parse(url)
	log('MITM', '>', target.hostname)
	const proxyReq = http.request(Object.assign(target, { method, headers }))
	.on('response', proxyRes => {
	res.writeHead(proxyRes.statusCode, proxyRes.headers)
	proxyRes.pipe(res)
	})
	.on('error', () => close(socket))
	req.pipe(proxyReq).on('error', () => close(socket))
	})

	// Tunnel Mode
	server.on('connect', (req, socket, head) => {
	const { url, headers } = req
	if (!verify(headers, socket)) return close(socket)
	const { port, hostname } = URL.parse('https://' + url)
	log('TUNNEL', '>', hostname)
	const proxySocket = net.connect(port, hostname)
	.on('connect', () => {
	socket.write('HTTP/1.1 200 Connection established\r\n\r\n')
	proxySocket.write(head)
	proxySocket.pipe(socket)
	socket.pipe(proxySocket)
	})
	.on('error', () => close(socket))
	socket.on('error', () => close(socket))
	})

	console.log(`Server ${CREDENTIALS} running @ ${server.cert ? 'https' : 'http'}://0.0.0.0:${PORT}`)
	{
	"name": "simple-proxy",
	"version": "0.1.3",
	"main": "index.js",
	"bin": "./index.js",
	"author": "nondanee"
	}