text: def main(request, response):
      """
    Simple handler that sets a response header based on which client hint
    request headers were received.
    """
  
      response.headers.append("Access-Control-Allow-Origin", "*")
      response.headers.append("Access-Control-Allow-Headers", "*")
      response.headers.append("Access-Control-Expose-Headers", "*")
  
      client_hint_headers = [
          "sec-ch-ua",
          "sec-ch-ua-arch",
          "sec-ch-ua-platform",
          "sec-ch-ua-platform-version",
          "sec-ch-ua-model",
          "sec-ch-ua-full-version",
      ]
  
      request_client_hints = {i: request.headers.get(i) for i in client_hint_headers}
  
      for header in client_hint_headers:
          if request_client_hints[header] is not None:
              response.headers.set(header + "-recieved", request_client_hints[header])
  
      headers = []
      content = ""
      return 200, headers, content
  