How can I access parameters passed in the URL when a form is POSTed to my script?

I've run into an issue with mod_rewrite when submitting forms to our site perl scripts. If someone does a GET request on a page with a url such as http://www.example.com/us/florida/page-title, I rewrite that using the following rewrite rule which works correctly:

RewriteRule ^us/(.*)/(.*)$ /cgi-bin/script.pl?action=Display&state=$1&page=$2 [NC,L,QSA]

Now, if that page had a form on it I'd like to do a form post to the same url and have Mod Rewrite use the same rewrite rule to call the same script and invoke the same action. However, what's happening is that the rewrite rule is being triggered, the correct script is being called and all form POST variables are being posted, however, the rewritten parameters (action, state & page in this example) aren't bein开发者_开发知识库g passed to the Perl script. I'm accessing these variables using the same Perl code for both the GET and POST requests:

use CGI;
$query = new CGI;
$action = $query->param('action');
$state = $query->param('state');
$page = $query->param('page');

I included the QSA flag since I figured that might resolve the issue but it didn't. If I do a POST directly to the script URL then everything works correctly. I'd appreciate any help in figuring out why this isn't currently working. Thanks in advance!

If you're doing a POST query, you need to use $query->url_param('action') etc. to get parameters from the query string. You don't need or benefit from the QSA modifier.

Change your script to:

use CGI;
use Data::Dumper;

my $query = CGI->new; # even though I'd rather call the object $cgi
print $query->header('text/plain'), Dumper($query); 

and take a look at what is being passed to your script and update your question with that information.