import typing from typing import Union, Any, Optional, Dict, List, Callable _XHTML_ESCAPE_RE = re.compile("[&<>\"']") _XHTML_ESCAPE_DICT = { "&": "&", "<": "<", ">": ">", '"': """ instead of tornado.util.u - we don't want backslashes getting # processed as escapes. _URL_RE = re.compile( to_unicode( r"""\b((?:([\w-]+):(/{1,3})|www[.])(?:(?:(?:[^\s& ()]|&|")*( collections.namedtuple( "RequestStartLine", ["method", "path", "version"] ) _http_version_re = re.compile(r"^HTTP/1\.[0-9]$") [docs]def parse_request_start_line(line: str) -> RequestStartLine: """Returns

import typing from typing import Union, Any, Optional, Dict, List, Callable _XHTML_ESCAPE_RE = re.compile("[&<>\"']") _XHTML_ESCAPE_DICT = { "&": "&", "<": "<", ">": ">", '"': """ instead of tornado.util.u - we don't want backslashes getting # processed as escapes. _URL_RE = re.compile( to_unicode( r"""\b((?:([\w-]+):(/{1,3})|www[.])(?:(?:(?:[^\s& ()]|&|")*( recipient MAY recognize a single LF as a line # terminator and ignore any preceding CR. _CRLF_RE = re.compile(r"\r?\n") class _NormalizedHeaderCache(dict): """Dynamic cached mapping of header names to