1AnyEvent::CacheDNS(3) User Contributed Perl DocumentationAnyEvent::CacheDNS(3)
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NAME

6       AnyEvent::CacheDNS - Simple DNS resolver with caching
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SYNOPSIS

9               use AnyEvent;
10               use AnyEvent::HTTP;
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12               # Register our DNS resolver as the default resolver
13               use AnyEvent::CacheDNS ':register';
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15               # Use AnyEvent as ususal
16               my $cond = AnyEvent->condvar;
17               http_get "http://search.cpan.org/", sub { $cond->send(); };
18               $cond->recv();
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DESCRIPTION

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

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

29   register
30       Registers a new DNS cache instance as AnyEvent's global DNS resolver.
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32   ENVIRONMENT
33       "PERL_ANYEVENT_DNS_TTL"
34           The effect of setting this variable differs depending on AnyEvent
35           version.
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37           AnyEvent 5.x
38               Default DNS response record cache TTL for older AnyEvent
39               versions.  AnyEvent::DNS <= 6.x doesn't report record TTL and
40               records get cached for infinite amount of time, therefore
41               running programs won't detect if cached DNS records have
42               changed.
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44               NOTE: Setting this variable to 0 disables purging records from
45               cache.
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47           AnyEvent 6.x
48               Newer versions of AnyEvent report DNS record TTL so records
49               will be purged from the cache after their TTL expires. Setting
50               this variable to any positive integer OVERRIDES the TTL for all
51               records to the specified value, setting variable to 0 disables
52               purging records from the cache.
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AUTHOR

55       Emmanuel Rodriguez <potyl@cpan.org>
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58       (C) 2011 Emmanuel Rodriguez - All Rights Reserved.
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62perl v5.36.0                      2023-01-19             AnyEvent::CacheDNS(3)
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