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package Plack::Middleware::SizeLimit; |
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use 5.008; |
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use strict; |
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use warnings; |
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use parent qw( |
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Plack::Middleware |
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Process::SizeLimit::Core |
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); |
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use Plack::Util::Accessor qw( |
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max_unshared_size_in_kb |
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min_shared_size_in_kb |
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max_process_size_in_kb |
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check_every_n_requests |
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log_when_limits_exceeded |
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); |
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our $VERSION = '0.10'; |
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sub prepare_app { |
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my $self = shift; |
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$self->set_check_interval($self->check_every_n_requests || 1); |
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$self->set_max_process_size($self->max_process_size_in_kb); |
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$self->set_min_shared_size($self->min_shared_size_in_kb); |
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$self->set_max_unshared_size($self->max_unshared_size_in_kb); |
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} |
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sub call { |
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my ($self, $env) = @_; |
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my $res = $self->app->($env); |
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return $res unless $env->{'psgix.harakiri'} or $env->{'psgix.harakiri.supported'}; |
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if (my $interval = $self->check_every_n_requests) { |
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my $pinc = $self->get_and_pinc_request_count; |
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return $res if ($pinc % $interval); |
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} |
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my $harakiri; |
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if ($env->{'psgix.harakiri'}) { |
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# Canonical implementation (Starman 0.2012+) |
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$harakiri = $env->{'psgix.harakiri.commit'} = $self->_limits_are_exceeded; |
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} |
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elsif ($env->{'psgix.harakiri.supported'}) { |
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# Legacy implementation (uWSGI) |
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$harakiri = $env->{'psgix.harakiri'} = $self->_limits_are_exceeded; |
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} |
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if ($harakiri && $self->log_when_limits_exceeded) { |
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my $message = sprintf( |
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'pid %d committed harakiri (size: %d, shared: %d, unshared: %d) at %s', |
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$$, $self->_check_size, $env->{REQUEST_URI}, |
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); |
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if (my $logger = $env->{'psgix.logger'}) { |
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$logger->( { message => $message, level => 'warn' } ); |
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} |
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else { |
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warn "$message\n"; |
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} |
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} |
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return $res; |
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} |
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1; |
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__END__ |