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package Plack::Middleware::JSConcat; |
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use strict; |
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use warnings; |
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our $VERSION = '0.29'; |
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use 5.008_001; |
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use parent qw(Plack::Middleware); |
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__PACKAGE__->mk_accessors(qw(js_content files key mtime filter)); |
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use IPC::Run3; |
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use Digest::MD5 'md5_hex'; |
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sub new { |
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my $class = shift; |
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my $self = $class->SUPER::new(@_); |
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local $/; |
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$self->js_content(join("\n", map { open my $fh, '<', $_ or die "$_: $!"; |
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"/* $_ */\n".<$fh> |
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} @{$self->files})); |
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$self->minify_js if $self->filter; |
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$self->key( md5_hex( $self->js_content ) ); |
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# XXX: use the latest mtime from $self->files instead |
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$self->mtime( time() ); |
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return $self; |
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} |
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sub minify_js { |
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my $self = shift; |
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my $output = ''; |
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local $SIG{'CHLD'} = 'DEFAULT'; |
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run3 [$self->filter], \$self->js_content, \$output, undef; |
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$self->js_content($output); |
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} |
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sub serve_js { |
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my $self = shift; |
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my $content_type = |
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return [ 200, [ 'Content-Type' => 'text/javascript', |
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'Content-Length' => length($self->js_content), |
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'Last-Modified' => HTTP::Date::time2str( $self->mtime ), |
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], |
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[$self->js_content] ]; |
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} |
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sub call { |
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my $self = shift; |
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my $env = shift; |
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my $url = $env->{'psgix.jsconcat.url'} = '/_js/'.$self->key; |
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return $self->serve_js if $env->{PATH_INFO} eq $url; |
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return $self->app->($env); |
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} |
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1; |
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__END__ |