Use Cloudflare Workers to proxy git requests to Github

worker.js

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

async function handleRequest(request) {
  let url = request.url
  if (url.indexOf("://") !== -1) {
    url = url.substring(url.indexOf("://") + "://".length)
  }
  if (url.indexOf("/") !== -1) {
    url = url.substring(url.indexOf("/"))
  }
  const targetURL = new URL("https://github.com" + url)
  console.log("targetURL = " + targetURL + ", method = " + request.method)

  const newHeaders = new Headers(request.headers)
  newHeaders.set('host', targetURL.host)

  let headersDebugStr = 'newHeaders ='
  for (const h of newHeaders.entries()) {
    const key = h[0]
    if (key.startsWith("cf-") || key == 'x-forwarded-proto' || key == 'x-real-ip') {
      newHeaders.delete(key)
      continue
    }
    headersDebugStr += ' | ' + h[0] + ':' + h[1] + ' '
  }
  console.log(headersDebugStr)

  const newRequest = new Request(targetURL, {
    method: request.method,
    headers: newHeaders,
    body: request.body
  })

  const response = await fetch(newRequest)

  headersDebugStr = 'response.headers ='
  for (const h of response.headers.entries()) {
    headersDebugStr += ' | ' + h[0] + ':' + h[1] + ' '
  }
  console.log(headersDebugStr)

  // Create a new response object based on the original response
  const newResponse = new Response(response.body, {
    status: response.status,
    statusText: response.statusText,
    headers: response.headers,
  })
  console.log("response.status = " + response.status)

  return newResponse
}