NAME Apache::GzipChain - compress HTML (or anything) in the OutputChain SYNOPSIS In the configuration of your apache add something like SetHandler perl-script PerlHandler Apache::OutputChain Apache::GzipChain __your_handler__ PerlSetVar GzipForce on # optional DESCRIPTION This module compresses any output from another perl handler if the browser requesting the document understands gzip encoding or if the config variable ForceGzip is set. To determine if the browser is able to understand us we check its *Accept-Encoding* header. The module works without influencing the other handlers in the chain. The only thing that can be noticed by other handlers is that the response header 'Content-Encoding' has been set. If GzipChain decides not to do any compression, it just declines and doesn't even register itself for the output chain. GzipChain compresses every single buffer content it receives via the output chain separately according to the GZIP specification (RFC 1952). The compression ratio therefore suffers if the other module sends its data in very small chunks. It is recommended that you use as few print statements as possible in conjunction with the GzipChain. One single print statement is recommended. HEADERS This handler sets the header "Content-Encoding" to "gzip" whenever it sends gzipped data. It also sets or appends to the "Vary" header the values "Accept-Encoding" unless the config variable GzipForce is set, in which case the output is the same for all user agents. Unicode Using this module under perl-5.8 or higher is ok for Unicode data. UTF-8 data passed to Compress::Zlib::memGzip() are converted to raw UTF-8 before compression takes place. Other data are simply passed through. PREREQUISITES Compress::Zlib, Apache::OutputChain AUTHOR Andreas Koenig, koenig@kulturbox.de based on code by Jan Pazdziora, adelton@fi.muni.cz LICENSE This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.