anaconda_wly, are you trying to make a GET or POST request from your script to something else (in which case you might start with LWP, specifically LWP::Simple or LWP::UserAgent and a look through lwpcook and lwptut), or are you wanting your script to receive GET/POST requests from another source (in which case something like AnyEvent::HTTP, HTTP::Lite, HTTP::Daemon, HTTP::Server::Simple, Net::Server::HTTP, or Net::HTTP::Tiny, among others, might fit your requirement)? (There are also a number of other modules that may be useful-just search for "HTTP" on CPAN.) Unfortunately, we need more information to be able to provide more guidance along your path.

Generoso's response above reminded me that you may want to be handling them as part of a CGI, in which case the CGI module, or a look at Web Client Programming in Perl might be of help.

Hope that helps.

Update: 2013-09-16 Added note referring to another user's post on the same thread.