# Source code for scrapy.downloadermiddlewares.downloadtimeout

    """
    Download timeout middleware

    See documentation in docs/topics/downloader-middleware.rst
    """

    from __future__ import annotations

    from typing import TYPE_CHECKING

    from scrapy import Request, Spider, signals
    from scrapy.utils.decorators import _warn_spider_arg
    from scrapy.utils.deprecate import warn_on_deprecated_spider_attribute

    if TYPE_CHECKING:
        # typing.Self requires Python 3.11
        from typing_extensions import Self

        from scrapy.crawler import Crawler
        from scrapy.http import Response

    class DownloadTimeoutMiddleware:
        def __init__(self, timeout: float = 180):
            self._timeout: float = timeout

        @classmethod
        def from_crawler(cls, crawler: Crawler) -> Self:
            o = cls(crawler.settings.getfloat("DOWNLOAD_TIMEOUT"))
            crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)
            return o

        def spider_opened(self, spider: Spider) -> None:
            if hasattr(spider, "download_timeout"):  # pragma: no cover
                warn_on_deprecated_spider_attribute("download_timeout", "DOWNLOAD_TIMEOUT")
            self._timeout = getattr(spider, "download_timeout", self._timeout)

        @_warn_spider_arg
        def process_request(
            self, request: Request, spider: Spider | None = None
        ) -> Request | Response | None:
            if self._timeout:
                request.meta.setdefault("download_timeout", self._timeout)
            return None