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A Moose role which overrides LWP's backend with a PSGI app that caches responses.
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README.md

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NAME

MooseX::CachingProxy - Send LWP requests through a caching proxy server

SYNOPSIS

package MyDownloader;
use Moose;
use WWW::Mechanize;
with 'MooseX::CachingProxy';

has url => (is => 'ro', isa => 'Str', default => 'http://example.com');

sub BUILD {$self->start_caching_proxy}

# this method retrieves web pages via the caching proxy
sub get_files { 
    my $response = WWW::Mechanize->new()->get('http://example.com');
}

# this method retrieves web pages directly from example.com
sub get_fresh_files {
    $self->stop_caching_proxy;
    my $response = WWW::Mechanize->new()->get('http://example.com');
    $self->start_caching_proxy;
}

DESCRIPTION

This is a Moose role that allows you to easily cache responses from remote servers. For this to work, use either LWP or a library that uses LWP (like WWW::Mechanize).

The implementation is a mashup of Plack::App::Proxy, Plack::Middleware::Cache, and LWP::Protocol::PSGI. It intercepts any LWP requests made and routes them to a PSGI app. The PSGI app will return a cached response if available or send the request on to the intended server.

This role requires a 'url' attribute or method.

Attributes

url

Required. All requests are proxied to this server. Example: http://example.com.

caching_proxy_dir

Optional. The directory on the local filesystem where responses are cached. The default location is '/tmp/caching-proxy'.

Methods

start_caching_proxy()

Start intercepting LWP requests with a caching proxy server

stop_caching_proxy()

Start intercepting LWP requests with a caching proxy server

THANKS

Thanks to Foxtons Ltd for providing the opportunity to write and release the original version of this module.

SEE ALSO

Plack::App::Proxy, Plack::Middleware::Cache, LWP::Protocol::PSGI

AUTHOR

Eric Johnson

COPYRIGHT AND LICENSE

This software is copyright (c) 2012 by Eric Johnson.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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