NAME

Plack::App::GitHub::WebHook - GitHub WebHook receiver as Plack application

VERSION

version 0.4

SYNOPSIS

    use Plack::App::GitHub::WebHook;

    Plack::App::GitHub::WebHook->new(
        hook => sub {
            my $payload = shift;
            ...
        }
    )->to_app;

Multiple hooks

If multiple hooks are provided, they get called one by one until a hook returns a false value.

    use Plack::App::GitHub::WebHook;
    use IPC::Run3;

    Plack::App::GitHub::WebHook->new(
        hook => [
            sub { $_[0]->{repository}{name} eq 'foo' }, # filter
            sub { my ($payload) = @_; ...  }, # some action
            sub { run3 \@cmd ... }, # some more action
        ]
    )->to_app;

Access restriction

By default access is restricted to known GitHub WebHook IPs.

    Plack::App::GitHub::WebHook->new(
        hook => sub { ... },
        access => [
            allow => "204.232.175.64/27",
            allow => "192.30.252.0/22",
            deny  => 'all'
        ]
    )->to_app;

    # this is equivalent to
    use Plack::Builder;
    builder {
        mount 'notify' => builder {
            enable 'Access', rules => [
                allow => "204.232.175.64/27",
                allow => "192.30.252.0/22",
                deny  => 'all'
            ]
            Plack::App::GitHub::WebHook->new(
                hook => sub { ... }
            );
        }
    };

DESCRIPTION

This PSGI application receives HTTP POST requests with body parameter payload set to a JSON object. The default use case is to receive GitHub WebHooks.

The response of a HTTP request to this application is one of:

HTTP 403 Forbidden

If access was not granted (for instance because it did not origin from GitHub).

HTTP 405 Method Not Allowed

If the request was no HTTP POST.

HTTP 400 Bad Request

If the payload was no well-formed JSON. A later version of this module may add further validation.

HTTP 200 OK

Otherwise, if the hook was called and returned a true value.

HTTP 202 Accepted

Otherwise, if the hook was called and returned a false value.

This module requires at least Perl 5.10.

CONFIGURATION

hook

A code reference or an array reference of code references with multiple tasks. Each task gets passed the encoded payload. If the task returns a true value, next the task is called or HTTP status code 200 is returned. Information can be passed from one task to the next by modifying the payload.

If a task fails or no task was given, HTTP status code 202 is returned immediately. This mechanism can be used for conditional hooks or to detect hooks that were called successfully but failed to execute for some reason.

access

Access restrictions, as passed to Plack::Middleware::Access. See SYNOPSIS for the default value. A recent list of official GitHub WebHook IPs is vailable at https://api.github.com/meta. One should only set the access value on instantiation, or manually call prepare_app after modification.

SEE ALSO

WWW::GitHub::PostReceiveHook uses Web::Simple to receive GitHub web hooks. Net::GitHub and Pithub provide access to GitHub APIs.

AUTHOR

Jakob Voß

COPYRIGHT AND LICENSE

This software is copyright (c) 2014 by Jakob Voß.

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