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moonmaster9000/yesod_bad_word.hs

Created August 1, 2010 11:52
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yesod_bad_word.hs
{-# LANGUAGE TypeFamilies, QuasiQuotes, TemplateHaskell #-}
import Yesod
data Echo = Echo
mkYesod "Echo" [$parseRoutes|
/echo/#String EchoR GET
|]
instance Yesod Echo where approot _ = ""
getEchoR s
| length s == 4 = permissionDenied "Forbidden: 4 letter word"
| otherwise = return $ RepPlain $ toContent s
main = basicHandler 3000 Echo
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