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package Perlbal::Plugin::Addheader; |
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use warnings; |
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use strict; |
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=head1 NAME |
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Perlbal::Plugin::Addheader - Add Headers to Perlbal webserver/reverse_proxy responses |
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=head1 VERSION |
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Version 0.01 |
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=cut |
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our $VERSION = '0.02'; |
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=head1 Description |
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This module allows you to add/change headers to/from perlbal responses. |
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You can configure headers to be added/changed based on each service declared, although the service role has to be set to web_server or reverse_proxy. |
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For each header you want to add/change, you have to specify the header content, this header content can be a set of characters or Perl code that will be evaluated for each response. |
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=head1 SYNOPSIS |
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This module provides a Perlbal plugin wich can be loaded and used as follows |
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Load Addheader |
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#ADDHEADER |
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ADDHEADER static Server This is My Webserver |
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CREATE SERVICE static |
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SET ROLE = web_server |
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SET docroot /server/static |
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SET plugins = Addheader |
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ENABLE static |
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In this case for each response served by the C, the header C will be changed to C. |
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In cases where you need a dynamic value to be server as header content, you can put Perl code as the header content, surrounding the header content with C<[%> and C<%]>. |
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ADDHEADER static Expires [% {use HTTP::Date;HTTP::Date::time2str(time() + 2592000)} %] |
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In this case, for each response, the header C will be added, ant the content will be the time in exactly 30 days from the time the response has been sent . |
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=head1 AUTHOR |
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Bruno Martins, C<< >> |
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=head1 BUGS |
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Please report any bugs or feature requests to C, or through |
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the web interface at L. I will be notified, and then you'll |
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automatically be notified of progress on your bug as I make changes. |
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=head1 SUPPORT |
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You can find documentation for this module with the perldoc command. |
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perldoc Perlbal::Plugin::Addheader |
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You can also look for information at: |
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=over 4 |
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=item * RT: CPAN's request tracker |
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L |
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=item * AnnoCPAN: Annotated CPAN documentation |
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=item * CPAN Ratings |
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=item * Search CPAN |
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=back |
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=head1 TODO |
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Allow add/change response headers on all services (non role dependent) |
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Allow add/change response headers on all services at a time (one line configuration) |
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=head1 COPYRIGHT & LICENSE |
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Copyright 2009 Bruno Martins C<< >> and SAPO C, all rights reserved. |
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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=cut |
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my $added_headers; |
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sub register { |
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my ($class, $svc) = @_; |
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use Data::Dumper; |
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$svc->register_hook('Addheader','modify_response_headers', sub { |
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my Perlbal::HTTPHeaders $res = $_[0]->{res_headers}; |
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my $service_name = $_[0]->{service}{'name'}; |
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if (defined $added_headers->{$service_name}) { |
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foreach my $header (@{$added_headers->{$service_name}}) { |
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my $header_content= $header->{'header_content'}; |
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if ($header_content =~/^\[\%.*\%]$/) { |
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$header_content =~s/^\[\%//; |
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$header_content =~s/\%\]$//; |
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$header_content = eval($header_content); |
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if ($@) { |
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print "Error on eval for header '$header->{'header_name'}'\n"; |
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next; |
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} |
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} |
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$res->header($header->{'header_name'}, $header_content); |
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} |
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} |
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return 0; |
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}); |
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$svc->register_hook('Addheader','backend_response_received', sub { |
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my Perlbal::HTTPHeaders $res = $_[0]->{res_headers}; |
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my $service_name = $_[0]->{service}{'name'}; |
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if (defined $added_headers->{$service_name}) { |
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foreach my $header (@{$added_headers->{$service_name}}) { |
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my $header_content= $header->{'header_content'}; |
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if ($header_content =~/^\[\%.*\%]$/) { |
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$header_content =~s/^\[\%//; |
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$header_content =~s/\%\]$//; |
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$header_content = eval($header_content); |
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if ($@) { |
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print "Error on eval for header '$header->{'header_name'}'\n"; |
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next; |
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} |
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} |
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$res->header($header->{'header_name'}, $header_content); |
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} |
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} |
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return 0; |
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}); |
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return 0; |
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} |
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sub unregister { |
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my ($class, $svc) = @_; |
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$svc->unregister_hooks('Addheader'); |
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return 1; |
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} |
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sub load { |
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Perlbal::register_global_hook('manage_command.addheader', sub { |
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my $command_regexp = qr/^addheader\s+(\w+)\s+([^\s]+)\s+(.*?)$/i; |
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my $mc = shift->parse($command_regexp, |
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"usage: ADDHEADER "); |
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my ($service, $header_name, $header_content) = $mc->args; |
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# Get the original line, since perlbal puts everything to lower case before parsing |
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my @args = ($mc->orig =~/$command_regexp/); |
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$header_content = pop @args; |
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push @{$added_headers->{$service}},{'header_name' => $header_name, 'header_content' => $header_content}; |
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}); |
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return 1; |
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} |
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0
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sub unload { return 1; } |
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196
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197
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198
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1; # End of Perlbal::Plugin::Addheader |