# Source code for scrapy.downloadermiddlewares.downloadtimeout

    """
    Download timeout middleware

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

    from scrapy import signals

    class DownloadTimeoutMiddleware:

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

        @classmethod
        def from_crawler(cls, crawler):
            o = cls(crawler.settings.getfloat('DOWNLOAD_TIMEOUT'))
            crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)
            return o

        def spider_opened(self, spider):
            self._timeout = getattr(spider, 'download_timeout', self._timeout)

        def process_request(self, request, spider):
            if self._timeout:
                request.meta.setdefault('download_timeout', self._timeout)