I want to transfer /script/action/var1___val1/var2___val2/.../varN___valN/ to /script/action?var1=val1&var2=val2&...&varN=valN. My rewrite rules are:

rewrite ^/script/(.*)/(\w+)___([^/]+)/(.*)$ /script/$1/$2=$3&$4? last;
rewrite ^/script/(\w+)/(.+) /script/$1?$2 break;

If value of val1/val2/.../valN is alphabets or digits, the rules works fine. Once url encoded value appears, the apmersands connecting variable-value pairs are escaped to '%26' which makes it sucks.

Can somebody help me?

Thanks, Kenny.