echo-cookie-header.py

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def main(request, response):

  # Set the cors enabled headers.

  origin = request.headers.get(b"Origin")

  headers = []

  if origin is not None and origin != b"null":

      headers.append((b"Content-Type", b"text/plain"))

      headers.append((b"Access-Control-Allow-Origin", origin))

      headers.append((b"Access-Control-Allow-Credentials", 'true'))

  cookie_header = request.headers.get(b"Cookie", b"")

  return (200, headers, cookie_header)