Function main

maint/scripts/test_resolvers.py:30–60

()

@gen.coroutine
def main():
    args = parse_command_line()

    if not args:
        args = ["localhost", "www.google.com", "www.facebook.com", "www.dropbox.com"]

    resolvers = [Resolver(), ThreadedResolver(), DefaultExecutorResolver()]

    if pycares is not None:
        from tornado.platform.caresresolver import CaresResolver

        resolvers.append(CaresResolver())

    family = {
        "unspec": socket.AF_UNSPEC,
        "inet": socket.AF_INET,
        "inet6": socket.AF_INET6,
    }[options.family]

    for host in args:
        print("Resolving %s" % host)
        for resolver in resolvers:
            try:
                addrinfo = yield resolver.resolve(host, 80, family)
            except Exception as e:
                print("%s: %s: %s" % (resolver.__class__.__name__, type(e), e))
            else:
                print(
                    "%s: %s" % (resolver.__class__.__name__, pprint.pformat(addrinfo))
                )
        print()


if __name__ == "__main__":