NAME
    Parallel::Downloader - simple downloading of multiple files at once

VERSION
    version 0.120101

SYNOPSIS
        use HTTP::Request::Common qw( GET POST );
        use Parallel::Downloader 'async_download';

        # simple example
        my @requests = map GET( "http://google.com" ), ( 1..15 );
        my @responses = async_download( requests => \@requests );

        # complex example
        my @complex_reqs = ( ( map POST( "http://google.com", [ type_id => $_ ] ), ( 1..60 ) ),
                           ( map POST( "http://yahoo.com", [ type_id => $_ ] ), ( 1..60 ) ) );

        my $downloader = Parallel::Downloader->new(
            requests => \@complex_reqs,
            workers => 50,
            conns_per_host => 12,
            aehttp_args => {
                timeout => 30,
                on_prepare => sub {
                    print "download started ($AnyEvent::HTTP::ACTIVE / $AnyEvent::HTTP::MAX_PER_HOST)\n"
                }
            },
            debug => 1,
            logger => sub {
                my ( $downloader, $message ) = @_;
                print "downloader sez [$message->{type}]: $message->{msg}\n";
            },
        );
        my @complex_responses = $downloader->run;

DESCRIPTION
    This is not a library to build a parallel downloader on top of. It is a
    downloading client build on top of AnyEvent::HTTP.

    Its goal is not to be better, faster, or smaller than anything else. Its
    goal is to provide the user with a single function they can call with a
    bunch of HTTP requests and which gives them the responses for them with
    as little fuss as possible and most importantly, without downloading
    them in sequence.

    It handles the busywork of grouping requests by hosts and limiting the
    amount of simultaneous requests per host, separate from capping the
    amount of overall connections. This allows the user to maximize their
    own connection without abusing remote hosts.

    Of course, there are facilities to customize the exact limits employed
    and to add logging and such; but "async_download" is the premier piece
    of API and should be enough for most uses.

FUNCTIONS
  async_download
    Can be requested to be exported, will instantiate a Parallel::Downloader
    object with the given parameters, run it and return the results.

METHODS
  run
    Runs the downloads for the given parameters and returns an array of
    array references, each containing the decoded contents, the headers and
    the HTTP::Request object.

SUPPORT
  Bugs / Feature Requests
    Please report any bugs or feature requests through the issue tracker at
    <http://rt.cpan.org/Public/Dist/Display.html?Name=Parallel-Downloader>.
    You will be notified automatically of any progress on your issue.

  Source Code
    This is open source software. The code repository is available for
    public review and contribution under the terms of the license.

    <https://github.com/wchristian/parallel-downloader>

      git clone https://github.com/wchristian/parallel-downloader.git

AUTHOR
    Christian Walde <walde.christian@googlemail.com>

COPYRIGHT AND LICENSE
    This software is Copyright (c) 2012 by Christian Walde.

    This is free software, licensed under:

      DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE, Version 2, December 2004

