Apache::SSI implements the functionality of mod_include for handling server-parsed HTML documents. It runs under Apache's mod_perl.

There are two main reasons you might want to use this module: you can subclass it to implement your own custom SSI directives, and you can parse the output of other mod_perl handlers or send the SSI output through another handler (use Apache::Filter to do this).

Available from CPAN. See the module manpage for more information.