from collections.abc import Mapping, Sequence
from io import BytesIO
from re import Pattern
from typing import Any

from waitress.adjustments import Adjustments
from waitress.receiver import ChunkedReceiver, FixedStreamReceiver
from waitress.utilities import Error

class ParsingError(Exception): ...
class TransferEncodingNotImplemented(Exception): ...

class HTTPRequestParser:
    completed: bool
    empty: bool
    expect_continue: bool
    headers_finished: bool
    header_plus: bytes
    chunked: bool
    content_length: int
    header_bytes_received: int
    body_bytes_received: int
    body_rcv: ChunkedReceiver | FixedStreamReceiver | None
    version: str
    error: Error | None
    connection_close: bool
    headers: Mapping[str, str]
    adj: Adjustments
    def __init__(self, adj: Adjustments) -> None: ...
    def received(self, data: bytes) -> int: ...
    first_line: str
    command: bytes
    url_scheme: str
    def parse_header(self, header_plus: bytes) -> None: ...
    def get_body_stream(self) -> BytesIO: ...
    def close(self) -> None: ...

def split_uri(uri: bytes) -> tuple[str, str, bytes, str, str]: ...
def get_header_lines(header: bytes) -> Sequence[bytes]: ...

first_line_re: Pattern[Any]

def crack_first_line(line: str) -> tuple[bytes, bytes, bytes]: ...