Adding URIs to the pool

[Giovanni Bechis]

Hi,
in a plugin I would like to extract URIs from attachments and add them to the 
pool that feeds uri rules and URIBL checks.
I looked at DecodeShortURLSs.pm but it's ugly and I am not sure it works 
correctly, in some cases it seems that it checks only part of the URIs in the 
message (only the ones extracted from the short ones).
Which is the correct way to check some uris for URIBL from inside a plugin ? 
Any hints ?
 Thanks & Cheers
  Giovanni