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

async function handleRequest(request) {
  // Extract the target URL from the path (e.g., /https://example.com/file)
  let url = request.url.substr(8)
  url = decodeURIComponent(url.substr(url.indexOf('/') + 1))
  
  if (url.indexOf('://') === -1) {
    url = 'https://' + url
  }

  // Forward the request with original headers
  const headers = new Headers(request.headers)
  headers.delete('host')
  
  const response = await fetch(url, {
    method: request.method,
    headers: headers,
    body: request.body
  })

  return new Response(response.body, {
    status: response.status,
    headers: response.headers
  })
}