Node Proxy from HTTPS to HTTP + CORS

node-proxy-https-to-http.js

// DO NOT USE IN PRODUCTION.. OBVIOUSLY.

const http = require('http')
const httpProxy = require('http-proxy')
const { argv } = require('yargs')

const proxy = httpProxy.createProxyServer()

proxy.on('error', e => console.log('error', e))

const ORIGIN = 'domain.com'
const TARGET = 'https://domain.com'

const server = http.createServer((req, res) => {
  console.log(req.url, req.method)

  req.on('data', message => console.log(' >>> ', message.toString()))

  if (req.headers.origin) {
    res.setHeader('Access-Control-Allow-Origin', req.headers.origin)
  }
  req.headers['Origin'] = ORIGIN

  res.setHeader('Access-Control-Allow-Credentials', 'true')
  res.setHeader('Access-Control-Allow-Methods', 'OPTIONS, GET, POST, PUT, DELETE')
  res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization, Cache-Control')
  res.setHeader('Access-Control-Expose-Headers', 'Content-Type, Authorization, Cache-Control')
  res.setHeader('Access-Control-Max-Age', '86400')

  if (req.method === 'OPTIONS') {
    res.writeHead(200)
    res.end()
    return
  }

  try {
    proxy.web(req, res, {
      target: TARGET,
      secure: true,
      rejectUnauthorized: false,
      changeOrigin: true
    })
  }
  catch (e) {
    console.log('err', e)
    res.end('error')
  }
})

const port = +argv.port || +argv.p || 9003

console.log('Running on http://localhost:' + port)

server.listen(port)