Critique some Ruby + RSpec Code for a SERP checker
I see you haven't got any response on this for a long while, so I'll give it a try.

I don't really see anything to pick on when it comes to style or technique. To me this looks very good. A few questions though:


why do you require "rspec" in the controller code? Shouldn't this be in the test code instead?
You don't do any attempt to sanitize or verify that the code works with non-english characters, or other characters that may cause trouble. What if someone type "tørris&amp;message=&lt;script&gt;alert("Hoy there");&lt;/script&gt;" in the input form? (I guess google will sanitize it, but it would probably be better to do it before passing the url to them.)