regarding URL Encoding based attacks

[Mayank Bhatnagar <mayank () ncb ernet in>]

hi list,

Well I dont know whether this message seems out of the context here or 
not, but didnt quite get a better suitable list to put forth my doubts.

I am working towards URL Encoding and Decoding based attacks. A nice paper 
could be read from here...

http://www.technicalinfo.net/papers/URLEmbeddedAttacks.html

To carry out on ths work, I have implemented a HTTP protocol engine and I 
am able to extract a complete URL string. This I am doing using C++/Unix 
environment.

Now my question is, I would like to know if there are some libraries 
exisiting using which I can decode the captured URLs. I wish to use the 
library (preferably in C/C++) and then proceed to find the attack patterns 
in them.

Can any one provide some links/references....

Thanks a lot,

Regards,
Mayank Bhatnagar
mayank () ncb ernet in