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58 lines
1.6 KiB
Perl
58 lines
1.6 KiB
Perl
# File: LWPUserAgentCached.pm
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#
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# Purpose: variant of LWP::UserAgent::WithCache. Instead of depending on
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# the 'expires' or 'Last-Modified' attributes, we always cache for the
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# specified duration.
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# SPDX-FileCopyrightText: 2021 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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package PBot::Core::Utils::LWPUserAgentCached;
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use PBot::Imports;
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use base qw/LWP::UserAgent/;
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use Cache::FileCache;
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use File::HomeDir;
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use File::Spec;
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our %default_cache_args = (
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'namespace' => 'pbot-cached',
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'cache_root' => File::Spec->catfile(File::HomeDir->my_home, '.cache'),
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'default_expires_in' => 600
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);
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sub new {
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my $class = shift;
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my $cache_opt;
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my %lwp_opt;
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unless (scalar @_ % 2) {
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%lwp_opt = @_;
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$cache_opt = {};
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for my $key (qw(namespace cache_root default_expires_in)) { $cache_opt->{$key} = delete $lwp_opt{$key} if exists $lwp_opt{$key}; }
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} else {
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$cache_opt = shift || {};
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%lwp_opt = @_;
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}
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my $self = $class->SUPER::new(%lwp_opt);
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my %cache_args = (%default_cache_args, %$cache_opt);
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$self->{cache} = Cache::FileCache->new(\%cache_args);
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return $self;
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}
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sub request {
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my ($self, @args) = @_;
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my $request = $args[0];
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return $self->SUPER::request(@args) if $request->method ne 'GET';
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my $uri = $request->uri->as_string;
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my $cached = $self->{cache}->get($uri);
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return HTTP::Response->parse($cached) if defined $cached;
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my $res = $self->SUPER::request(@args);
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$self->{cache}->set($uri, $res->as_string) if $res->code eq HTTP::Status::RC_OK;
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return $res;
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}
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1;
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