Hack is certainly usable, although I would consider it deprecated in favor of WAI (mostly for performance reasons): http://www.yesodweb.com/book/wai http://www.

Hack is certainly usable, although I would consider it deprecated in favor of WAI (mostly for performance reasons): http://www.yesodweb.com/book/wai http://www.yesodweb.com/book/wai