Encoded URL issues

[eluser]mwolf[/eluser]
I'm trying to pass a URL like below, but it seems to be erroring out on the % symbols.

Code:

http://domain.com/index.php/request/index/12312/http%3 A%2 F%2 Fwww.google.com

Any ideas why this doesn't work? And, what would it take to get it to work?

EDIT: I had to add space because the forums was converting the ascii characters. My URL does not have the spaces in it.