How to get an .htaccess rewrite rule with filtering directory and keeping parameters

Question

I'am trying to write a rewrite rule and I would like to change this:

http://domain.de/adServer/js/first/sec/ADTECH?loc=300&alias=Home&misc=1429871690242

to:

http://domain.de/adServer/js/ADTECH.php?a=$1&b=$2

where $_Get in ADTECH.php shout be:

$_GET['a']=first | $_GET['b']=sec | $_GET['loc']=300 | $_GET['alias']=Home

The .htaccess-file will be placed in root/adServer/js. I tryed this without success:

RewriteEngine On
Options +FollowSymlinks 
RewriteBase / 

RewriteCond %{REQUEST_URI} /adServer/js/(.*)/(.*)/ADTECH$ 
RewriteRule (.*)/(.*)/ADTECH$ /adServer/js/test.php?a=$1&b=$2 

(My code brings the $_GET['a']=first | $_GET['b']=sec as new parameters but whats to do with the given parameters?)

Answer 1

You can use this code in /adServer/js/.htaccess:

RewriteEngine On
Options +FollowSymlinks 
RewriteBase /adServer/js/ 

RewriteRule ^([^/]+)/([^/]+)/ADTECH/?$ test.php?a=$1&b=$2 [L,QSA,NC]

Changes are:

1. Add required flags in RewriteRule. Esp important is QSA to preserve original query string.
2. Add appropriate RewriteBase.
3. Remove redundant RewriteCond
4. Use relative path for rewriting in RewriteRule.