AnyEvent::CacheDNS

AnyEvent::CacheDNS(3pmUser Contributed Perl DocumentatiAnyEvent::CacheDNS(3pm)



NAME
       AnyEvent::CacheDNS - Simple DNS resolver with caching

SYNOPSIS
               use AnyEvent;
               use AnyEvent::HTTP;

               # Register our DNS resolver as the default resolver
               use AnyEvent::CacheDNS ':register';

               # Use AnyEvent as ususal
               my $cond = AnyEvent->condvar;
               http_get "http://search.cpan.org/", sub { $cond->send(); };
               $cond->recv();

DESCRIPTION
       This module provides a very simple DNS resolver that caches its results
       and can improve the connection times to remote hosts.

Import
       It's possible to register the this class as AnyEvent's main DNS
       resolver by passing the tag ":register" in the "use" statement.

METHODS
   register
       Registers a new DNS cache instance as AnyEvent's global DNS resolver.

   ENVIRONMENT
       "PERL_ANYEVENT_DNS_TTL"
           The effect of setting this variable differs depending on AnyEvent
           version.

           AnyEvent 5.x
               Default DNS response record cache TTL for older AnyEvent
               versions.  AnyEvent::DNS <= 6.x doesn't report record TTL and
               records get cached for infinite amount of time, therefore
               running programs won't detect if cached DNS records have
               changed.

               NOTE: Setting this variable to 0 disables purging records from
               cache.

           AnyEvent 6.x
               Newer versions of AnyEvent report DNS record TTL so records
               will be purged from the cache after their TTL expires. Setting
               this variable to any positive integer OVERRIDES the TTL for all
               records to the specified value, setting variable to 0 disables
               purging records from the cache.

AUTHOR
       Emmanuel Rodriguez <potyl@cpan.org>

COPYRIGHT
       (C) 2011 Emmanuel Rodriguez - All Rights Reserved.



perl v5.20.2                      2015-04-26           AnyEvent::CacheDNS(3pm)