{-# LANGUAGE
    OverloadedStrings
  , UnicodeSyntax
  #-}
import qualified Data.ByteString.Lazy.Char8 as Lazy
import Control.Applicative
import qualified Data.Collections as C
import Control.Monad.Unicode
import Data.Maybe
import Data.Monoid.Unicode
import Network
import Network.HTTP.Lucu

main ∷ IO ()
main = let config = defaultConfig { cnfServerPort = "9999" }
           tree   ∷ ResourceTree
           tree   = C.fromList [ ([], nonGreedy resMain) ]
       in
         do putStrLn "Access http://localhost:9999/ with your browser."
            withSocketsDo $ runHttpd config $ resourceMap tree

resMain ∷ Resource
resMain = C.fromList
          [ ( GET
            , do setContentType $ parseMIMEType "text/html"
                 putChunks $ "<title>Multipart Form Test</title>\n"
                           ⊕ "<form action=\"/\" method=\"post\" enctype=\"multipart/form-data\">\n"
                           ⊕ "  Upload some file:\n"
                           ⊕ "  <input type=\"text\" name=\"text\">\n"
                           ⊕ "  <input type=\"file\" name=\"file\">\n"
                           ⊕ "  <input type=\"submit\" value=\"Submit\">\n"
                           ⊕ "</form>\n"
            )
          , ( POST
            , do form ← getForm Nothing
                 let text     = fromMaybe (∅) $ fdContent <$> lookup "text" form
                     file     = fromMaybe (∅) $ fdContent <$> lookup "file" form
                     fileName = fdFileName =≪ lookup "file" form
                 setContentType $ parseMIMEType "text/plain"
                 putChunks $ "You entered \"" ⊕ text ⊕ "\".\n"
                 putChunks $ "You uploaded a " ⊕ Lazy.pack (show $ Lazy.length file) ⊕ " bytes long file.\n"
                 putChunks $ "The file name is " ⊕ Lazy.pack (show fileName) ⊕ ".\n"
            )
          ]