inspect-headers.py

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from wptserve.utils import isomorphic_encode

def get_response(raw_headers, filter_value, filter_name):

    result = b""

    # raw_headers.raw_items() returns the (name, value) header pairs as

    # tuples of strings. Convert them to bytes before comparing.

    # TODO: Get access to the raw headers, so that whitespace between

    # name, ":" and value can also be checked:

    # https://github.com/web-platform-tests/wpt/issues/28756

    for field in raw_headers.raw_items():

        name = isomorphic_encode(field[0])

        value = isomorphic_encode(field[1])

        if filter_value:

            if value == filter_value:

                result += name + b","

        elif name.lower() == filter_name:

            result += name + b": " + value + b"\n"

    return result

def main(request, response):

    headers = []

    if b"cors" in request.GET:

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

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

        headers.append((b"Access-Control-Allow-Methods", b"GET, POST, PUT, FOO"))

        headers.append((b"Access-Control-Allow-Headers", b"x-test, x-foo"))

        headers.append((

            b"Access-Control-Expose-Headers",

            b"x-request-method, x-request-content-type, x-request-query, x-request-content-length"))

    headers.append((b"content-type", b"text/plain"))

    filter_value = request.GET.first(b"filter_value", b"")

    filter_name = request.GET.first(b"filter_name", b"").lower()

    result = get_response(request.raw_headers, filter_value, filter_name)

    return headers, result