NAME Plack::Middleware::Deflater - Compress response body with Gzip or Deflate SYNOPSIS use Plack::Builder; builder { enable sub { my $app = shift; sub { my $env = shift; my $ua = $env->{HTTP_USER_AGENT} || ''; # Netscape has some problem $env->{"psgix.compress-only-text/html"} = 1 if $ua =~ m!^Mozilla/4!; # Netscape 4.06-4.08 have some more problems $env->{"psgix.no-compress"} = 1 if $ua =~ m!^Mozilla/4\.0[678]!; # MSIE (7|8) masquerades as Netscape, but it is fine if ( $ua =~ m!\bMSIE (?:7|8)! ) { $env->{"psgix.no-compress"} = 0; $env->{"psgix.compress-only-text/html"} = 0; } $app->($env); } }; enable "Deflater", content_type => ['text/css','text/html','text/javascript','application/javascript'], vary_user_agent => 1; sub { [200,['Content-Type','text/html'],["OK"]] } }; DESCRIPTION Plack::Middleware::Deflater is a middleware to encode your response body in gzip or deflate, based on "Accept-Encoding" HTTP request header. It would save the bandwidth a little bit but should increase the Plack server load, so ideally you should handle this on the frontend reverse proxy servers. This middleware removes "Content-Length" and streams encoded content, which means the server should support HTTP/1.1 chunked response or downgrade to HTTP/1.0 and closes the connection. CONFIGURATIONS content_type content_type => 'text/html', content_type => [ 'text/html', 'text/css', 'text/javascript', 'application/javascript', 'application/x-javascript' ] Content-Type header to apply deflater. if content-type is not defined, Deflater will try to deflate all contents. vary_user_agent vary_user_agent => 1 Add "User-Agent" to Vary header. ENVIRONMENT VALUE psgix.no-compress Do not apply deflater psgix.compress-only-text/html Apply deflater only if content_type is "text/html" LICENSE This software is licensed under the same terms as Perl itself. AUTHOR Tatsuhiko Miyagawa SEE ALSO Plack, <http://httpd.apache.org/docs/2.2/en/mod/mod_deflate.html>