Express it

[rasta]

Does anyone know how to write a regular expression
for checking if an URL like below is valid?
TRUE
e.g. http://www.my_site.com/image.jpg/.gif
FALSE
e.g. http://www.my_site.com

In other words I am trying to check
if the URL is a .jpg or .gif image.

Thnkz in advance.

[van__]

ohhh man...
you don't even know what you just asked for.

do a search on Google for Friedl
He has all the crazy regexs for domain pattern matching like you couldn't believe.

Yahoo even set him up with a page:
http://public.yahoo.com/~jfriedl/regex/

You can download his complete email pattern matcher here:
http://public.yahoo.com/~jfriedl/regex/code.html

Looking at the code will let give you a clue as to how hard this one really is.

especially since you need to match
www.bat-matzu.co.jp
bah.bat-matzu.co.uk

but not:
bah.bat-matzu.co.com
and not
www.bat-matzu.foo

So hopefully you've got an idea of where to start.