Rails standardize URI.encode

Question

If {"foo" => "yo%20daddy"} comes through the url, params[:foo] plays nicely with URI.encode, resolving to:

URI.encode("yo daddy")
#=> "yo%20daddy"

However if "foo" comes as a JSON parameter, it does not.

URI.encode("yo%20daddy")
#=> "yo%2520daddy"

A solution to standardize this is

URI.encode(URI.decode("yo daddy"))
#=> "yo%20daddy"

URI.encode(URI.decode("yo%20daddy"))
#=> "yo%20daddy"

But that seems downright silly. Any better ideas?