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[doc] DNS_RESOLVER setting

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Eugenio Lacuesta 2020-01-18 01:41:57 -03:00
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docs/topics/settings.rst
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@ -397,6 +397,19 @@ Default: ``10000``
DNS in-memory cache size.
.. setting:: DNS_RESOLVER
DNS_RESOLVER
------------
Default: ``'scrapy.resolver.CachingThreadedResolver'``
The class to be used to resolve DNS names. The default ``scrapy.resolver.CachingThreadedResolver``
supports specifying a timeout for DNS requests via the :setting:`DNS_TIMEOUT` setting,
but works only with IPv4 addresses. Scrapy provides an alternative resolver,
``scrapy.resolver.CachingHostnameResolver``, which supports IPv4/IPv6 addresses but does not
take the :setting:`DNS_TIMEOUT` setting into account.
.. setting:: DNS_TIMEOUT
DNS_TIMEOUT