tornado.platform.caresresolver — Asynchronous DNS Resolver using C-Ares¶
This module contains a DNS resolver using the c-ares library (and its
Name resolver based on the c-ares library.
This is a non-blocking and non-threaded resolver. It may not produce the same results as the system resolver, but can be used for non-blocking resolution when threads cannot be used.
c-ares fails to resolve some names when
AF_UNSPEC, so it is only recommended for use in
AF_INET(i.e. IPv4). This is the default for
tornado.simple_httpclient, but other libraries may default to