how to get unescaped value of request.url AS-IS?

hi guys,

Calling request.url returns "http://gozila-underground.com/search?
search%5Bby_keyword%5D=&commit=Search" which is an escaped version of
"http://gozila-underground.com:3000/search?
search[by_keyword]=&commit=Search".

In ruby on rails, how to get the unescaped value of request.url (AS
IS)?

thank you