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Description
FromParam has instances for some common types, but it doesn't have an instance for String. That's not such a big deal, because usually it's nicer to use Text. But since a lot of functions from Prelude still use String, it makes sense to let users have String params as well.
Adding a String instance will let people write a route like this:
route ctxt [ path "hello" // param "name" ==> helloHandler ]
and a handler like this:
helloHandler :: Ctxt -> String -> IO (Maybe Response)
helloHandler ctxt name =
let helloMessage = T.pack ("Hello " ++ name) in
okText helloMessage
And when you went to "/hello?name=Suzy", you would see "Hello Suzy".
Right now, you would get an error that there's no FromParam instance for String.