tornado.platform.caresresolver — Asynchronous DNS Resolver using C-Ares¶

class tornado.platform.caresresolver.¶

Name resolver based on the c-ares library.

This is a non-blocking and non-threaded resolver. It may not producethe same results as the system resolver, but can be used for non-blockingresolution when threads cannot be used.

c-ares fails to resolve some names when family is ,so it is only recommended for use in AF_INET (i.e. IPv4). This isthe default for , but other librariesmay default to AF_UNSPEC.