# Check line 1277 to line 1278 (main branch of Python currently):
# https://github.com/python/cpython/blob/17b16e1/Lib/http/server.py#L1277-L1278
#
# thus, `functools.partial` (closure/wrapper) will
# make the parameter `protocol` of the function `test` useless.
#
# So, for anyone who specify a handler class directly,
# everything is okay, its my bad to take the test function out of context.

import os
import socket
import contextlib
from functools import partial

# [main branch of http/server.py](
#       https://github.com/python/cpython/blob/17b16e1/Lib/http/server.py)
# rename as the_main_branch_http to avoid native version conflict
from the_main_branch_http import *
import the_main_branch_http as http

############################################################################
# copy from http/server.py, begin
############################################################################

if __name__ == '__main__':

    import argparse

    parser = argparse.ArgumentParser()
    parser.add_argument('--cgi', action='store_true',
                        help='Run as CGI Server')
    parser.add_argument('--bind', '-b', metavar='ADDRESS',
                        help='Specify alternate bind address '
                             '[default: all interfaces]')
    parser.add_argument('--directory', '-d', default=os.getcwd(),
                        help='Specify alternative directory '
                             '[default:current directory]')
    parser.add_argument('port', action='store',
                        default=8000, type=int,
                        nargs='?',
                        help='Specify alternate port [default: 8000]')
    args = parser.parse_args()
    if args.cgi:
        handler_class = CGIHTTPRequestHandler
    else:
        handler_class = partial(SimpleHTTPRequestHandler,
                                directory=args.directory)

    # ensure dual-stack is not disabled; ref #38907
    class DualStackServer(ThreadingHTTPServer):
        def server_bind(self):
            # suppress exception when protocol is IPv4
            with contextlib.suppress(Exception):
                self.socket.setsockopt(
                    socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
            return super().server_bind()

############################################################################
# end (only the comment out part changed)
############################################################################

if "__main__" == __name__:
    # officially how the test function called
    # test(
    #     HandlerClass=handler_class,
    #     ServerClass=DualStackServer,
    #     port=args.port,
    #     bind=args.bind,
    # )

    # mine
    http.test(
          HandlerClass=handler_class,
          port=args.port,
          bind=args.bind,
          protocol="any_but_not_the_BaseHTTPRequestHandler.protocol_version")

    # run this script by `python /path/to/my_http.py`
    # then, run a http client, e.g `curl -i http://127.0.0.1:8000`
    #
    # at last, check first line of the curl's output
    # it is not what parameter protocol specified (yes, its so long now),
    # but always "HTTP/1.0 200 OK"