Documentation

Redirect with slash appended URL if only a trailing slash is needed for successful matching, otherwise it responds normally.

>>> let mkRequest p = dummyRequest & host .~ "example.com" & path .~ p
>>> let respond name = ok $ "<h1>Hello " <> name <> "</h1>"
>>> let app = slashRedirect (prefixed "/hello/" . suffixed "/") respond

>>> app (mkRequest "/hello/there") <&> status
Just "301 Moved Permanently"
>>> app (mkRequest "/hello/there") >>= preview location
Just "http://example.com/hello/there/"

>>> app (mkRequest "/hello/there/") <&> status
Just "200 OK"
>>> app (mkRequest "/hello/there/") <&> body
Just "<h1>Hello there</h1>"

>>> app $ mkRequest "/bye/"
Nothing