Method from_crawler

scrapy/resolver.py:44–49

(cls, crawler: Crawler, reactor: ReactorBase)

    @classmethod
    def from_crawler(cls, crawler: Crawler, reactor: ReactorBase) -> Self:
        if crawler.settings.getbool("DNSCACHE_ENABLED"):
            cache_size = crawler.settings.getint("DNSCACHE_SIZE")
        else:
            cache_size = 0
        return cls(reactor, cache_size, crawler.settings.getfloat("DNS_TIMEOUT"))

    def install_on_reactor(self) -> None:
        self.reactor.installResolver(self)