def _extractURLparts(request: IRequest) -> Tuple[str, str, int, str, str]:
"""
Extracts and decodes URI parts from C{request}.
All strings must be UTF8-decodable.
@param request: A Twisted Web request.
@raise URLDecodeError: If one of the parts could not be decoded as UTF-8.
@return: L{tuple} of the URL scheme, the server name, the server port, the
path info and the script name.
"""
server_name = request.getRequestHostname()
if hasattr(request.getHost(), "port"):
server_port = request.getHost().port
else:
server_port = 0
if (bool(request.isSecure()), server_port) not in [
(True, 443),
(False, 80),
(False, 0),
(True, 0),
]:
server_name = server_name + b":" + intToBytes(server_port)
script_name = b""
if request.prepath:
script_name = b"/".join(request.prepath)
if not script_name.startswith(b"/"):
script_name = b"/" + script_name
path_info = b""
if request.postpath:
path_info = b"/".join(request.postpath)
if not path_info.startswith(b"/"):
path_info = b"/" + path_info
url_scheme = "https" if request.isSecure() else "http"
utf8Failures = []
try:
server_name = server_name.decode("utf-8")
except UnicodeDecodeError:
utf8Failures.append(("SERVER_NAME", Failure()))
try:
path_text = path_info.decode("utf-8")
except UnicodeDecodeError:
utf8Failures.append(("PATH_INFO", Failure()))
try:
script_text = script_name.decode("utf-8")
except UnicodeDecodeError:
utf8Failures.append(("SCRIPT_NAME", Failure()))
if utf8Failures:
raise _URLDecodeError(utf8Failures)
return url_scheme, server_name, server_port, path_text, script_text
def _get_requested_host(request: IRequest) -> bytes:
hostname = request.getHeader(b"host")
if hostname:
return hostname
# no Host header, use the address/port that the request arrived on
host: Union[address.IPv4Address, address.IPv6Address] = request.getHost()
hostname = host.host.encode("ascii")
if request.isSecure() and host.port == 443:
# default port for https
return hostname
if not request.isSecure() and host.port == 80:
# default port for http
return hostname
return b"%s:%i" % (
hostname,
host.port,
)
