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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙimport asyncio import enum import sys import warnings from types import TracebackType from typing import Any, Optional, Type if sys.version_info >= (3, 8): from typing import final else: from typing_extensions import final __version__ = "4.0.2" __all__ = ("timeout", "timeout_at", "Timeout") def timeout(delay: Optional[float]) -> "Timeout": """timeout context manager. Useful in cases when you want to apply timeout logic around block of code or in cases when asyncio.wait_for is not suitable. For example: >>> async with timeout(0.001): ... async with aiohttp.get('https://github.com') as r: ... await r.text() delay - value in seconds or None to disable timeout logic """ loop = _get_running_loop() if delay is not None: deadline = loop.time() + delay # type: Optional[float] else: deadline = None return Timeout(deadline, loop) def timeout_at(deadline: Optional[float]) -> "Timeout": """Schedule the timeout at absolute time. deadline argument points on the time in the same clock system as loop.time(). Please note: it is not POSIX time but a time with undefined starting base, e.g. the time of the system power on. >>> async with timeout_at(loop.time() + 10): ... async with aiohttp.get('https://github.com') as r: ... await r.text() """ loop = _get_running_loop() return Timeout(deadline, loop) class _State(enum.Enum): INIT = "INIT" ENTER = "ENTER" TIMEOUT = "TIMEOUT" EXIT = "EXIT" @final class Timeout: # Internal class, please don't instantiate it directly # Use timeout() and timeout_at() public factories instead. # # Implementation note: `async with timeout()` is preferred # over `with timeout()`. # While technically the Timeout class implementation # doesn't need to be async at all, # the `async with` statement explicitly points that # the context manager should be used from async function context. # # This design allows to avoid many silly misusages. # # TimeoutError is raised immadiatelly when scheduled # if the deadline is passed. # The purpose is to time out as sson as possible # without waiting for the next await expression. __slots__ = ("_deadline", "_loop", "_state", "_timeout_handler") def __init__( self, deadline: Optional[float], loop: asyncio.AbstractEventLoop ) -> None: self._loop = loop self._state = _State.INIT self._timeout_handler = None # type: Optional[asyncio.Handle] if deadline is None: self._deadline = None # type: Optional[float] else: self.update(deadline) def __enter__(self) -> "Timeout": warnings.warn( "with timeout() is deprecated, use async with timeout() instead", DeprecationWarning, stacklevel=2, ) self._do_enter() return self def __exit__( self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType], ) -> Optional[bool]: self._do_exit(exc_type) return None async def __aenter__(self) -> "Timeout": self._do_enter() return self async def __aexit__( self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType], ) -> Optional[bool]: self._do_exit(exc_type) return None @property def expired(self) -> bool: """Is timeout expired during execution?""" return self._state == _State.TIMEOUT @property def deadline(self) -> Optional[float]: return self._deadline def reject(self) -> None: """Reject scheduled timeout if any.""" # cancel is maybe better name but # task.cancel() raises CancelledError in asyncio world. if self._state not in (_State.INIT, _State.ENTER): raise RuntimeError(f"invalid state {self._state.value}") self._reject() def _reject(self) -> None: if self._timeout_handler is not None: self._timeout_handler.cancel() self._timeout_handler = None def shift(self, delay: float) -> None: """Advance timeout on delay seconds. The delay can be negative. Raise RuntimeError if shift is called when deadline is not scheduled """ deadline = self._deadline if deadline is None: raise RuntimeError("cannot shift timeout if deadline is not scheduled") self.update(deadline + delay) def update(self, deadline: float) -> None: """Set deadline to absolute value. deadline argument points on the time in the same clock system as loop.time(). If new deadline is in the past the timeout is raised immediatelly. Please note: it is not POSIX time but a time with undefined starting base, e.g. the time of the system power on. """ if self._state == _State.EXIT: raise RuntimeError("cannot reschedule after exit from context manager") if self._state == _State.TIMEOUT: raise RuntimeError("cannot reschedule expired timeout") if self._timeout_handler is not None: self._timeout_handler.cancel() self._deadline = deadline if self._state != _State.INIT: self._reschedule() def _reschedule(self) -> None: assert self._state == _State.ENTER deadline = self._deadline if deadline is None: return now = self._loop.time() if self._timeout_handler is not None: self._timeout_handler.cancel() task = _current_task(self._loop) if deadline <= now: self._timeout_handler = self._loop.call_soon(self._on_timeout, task) else: self._timeout_handler = self._loop.call_at(deadline, self._on_timeout, task) def _do_enter(self) -> None: if self._state != _State.INIT: raise RuntimeError(f"invalid state {self._state.value}") self._state = _State.ENTER self._reschedule() def _do_exit(self, exc_type: Optional[Type[BaseException]]) -> None: if exc_type is asyncio.CancelledError and self._state == _State.TIMEOUT: self._timeout_handler = None raise asyncio.TimeoutError # timeout has not expired self._state = _State.EXIT self._reject() return None def _on_timeout(self, task: "asyncio.Task[None]") -> None: task.cancel() self._state = _State.TIMEOUT # drop the reference early self._timeout_handler = None if sys.version_info >= (3, 7): def _current_task(loop: asyncio.AbstractEventLoop) -> "Optional[asyncio.Task[Any]]": return asyncio.current_task(loop=loop) else: def _current_task(loop: asyncio.AbstractEventLoop) -> "Optional[asyncio.Task[Any]]": return asyncio.Task.current_task(loop=loop) if sys.version_info >= (3, 7): def _get_running_loop() -> asyncio.AbstractEventLoop: return asyncio.get_running_loop() else: def _get_running_loop() -> asyncio.AbstractEventLoop: loop = asyncio.get_event_loop() if not loop.is_running(): raise RuntimeError("no running event loop") return loop