NAME

       HTTP::Proxy::HeaderFilter::simple - A class for creating simple filters

SYNOPSIS

           use HTTP::Proxy::HeaderFilter::simple;

           # a simple User-Agent filter
           my $filter = HTTP::Proxy::HeaderFilter::simple->new(
               sub { $_[1]->header( User_Agent => 'foobar/1.0' ); }
           );
           $proxy->push_filter( request => $filter );

DESCRIPTION

       HTTP::Proxy::HeaderFilter::simple can create BodyFilter without going through the hassle
       of creating a full-fledged class. Simply pass a code reference to the "filter()" method of
       your filter to the constructor, and you'll get the adequate filter.

   Constructor calling convention
       The constructor is called with a single code reference.  The code reference must conform
       to the standard "filter()" signature for header filters:

           sub filter { my ( $self, $headers, $message) = @_; ... }

       This code reference is used for the "filter()" method.

METHODS

       This filter "factory" defines the standard HTTP::Proxy::HeaderFilter methods, but those
       are only, erm, "proxies" to the actual CODE references passed to the constructor. These
       "proxy" methods are:

       filter()
       begin()
       end()

       Two other methods are actually HTTP::Proxy::HeaderFilter::simple methods, and are called
       automatically:

       init()
           Initialise the filter instance with the code references passed to the constructor.

       can()
           Return the actual code reference that will be run, and not the "proxy" methods. If
           called with any other name than "begin" and "filter", it calls "UNIVERSAL::can()"
           instead.

SEE ALSO

       HTTP::Proxy, HTTP::Proxy::HeaderFilter.

AUTHOR

       Philippe "BooK" Bruhat, <book@cpan.org>.

COPYRIGHT

       Copyright 2003-2015, Philippe Bruhat.

LICENSE

       This module is free software; you can redistribute it or modify it under the same terms as
       Perl itself.