Proxy Server

Http and Socks proxy server with zero dependencies

Content

• Usage
• TLS
• Authorization
• Keep Alive
• Custom proxy connection
• Examples

Usage

const { createProxyServer } = require('@mutagen-d/node-proxy-server')
const port = 8080
const server = createProxyServer()
server.on('error', (error) => {
  console.log('server error', error)
})
server.listen(port, '0.0.0.0', () => console.log('proxy-server listening port', port))

Tls

create tls server

const fs = require('fs')
const path = require('path')
const server = createProxyServer({
  cert: fs.readFileSync(path.join(__dirname, './cert.pem'), 'utf-8'),
  key: fs.readFileSync(path.join(__dirname, './key.pem'), 'utf-8'),
})

Authorization

const server = createProxyServer({ auth: true })
server.on('proxy-auth', (username, password, callback) => {
  callback(username === 'login' && password === '1234')
})

Only first "proxy-auth" event listener will be envoked

KeepAlive

server.on('connection', (socket) => {
  socket.setTimeout(30 * 1000, () => socket.destroy())
})

Custom proxy connection

Use createProxyConnection method. By default net module is used to create connection, e.i.

const net = require('net')
const { createProxyServer } = require('./src')
const server = createProxyServer({
  createProxyConnection: async (info) => {
    const socket = net.createConnection({ host: info.dstHost, port: info.dstPort })
    return new Promise((resolve, reject) => {
      socket.on('connect', () => resolve(socket))
      socket.on('error', (error) => reject(error))
    })
  }
})

One can also use other methods to create connection, e.i ssh2-dynamic-port-forwarding

const { createProxyServer } = require('./src')
const { Client } = require('ssh2')
const util = require('util')

const sshClient = new Client()
const forwardOut = util.promisify(sshClient.forwardOut)

const server = createProxyServer({
  createProxyConnection: async (info) => {
    const stream = await forwardOut.call(sshClient, info.srcHost, info.srcPort, info.dstHost, info.dstPort)
    return stream
  },
})

sshClient.connect({
  host: 'localhost',
  username: 'username',
  password: '12345',
})
sshClient.on('ready', () => {
  const port = 8080
  server.listen(port, '0.0.0.0', () => console.log('proxy-server listening port', port))
})

Examples

see examples