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|
--------------------------------------------------------------------
-- |
-- Module : Codec.MIME.Utils
-- Copyright : (c) 2006-2009, Galois, Inc.
-- License : BSD3
--
-- Maintainer: Sigbjorn Finne <sigbjorn.finne@gmail.com>
-- Stability : provisional
-- Portability: portable
--
-- Extracting content from MIME values and types.
--
--------------------------------------------------------------------
module Codec.MIME.Utils
( findMultipartNamed -- :: String -> MIMEValue -> Maybe MIMEValue
) where
import Codec.MIME.Type
import Data.List ( find )
import Control.Monad ( msum )
import Data.Text(Text)
-- | Given a parameter name, locate it within a MIME value,
-- returning the corresponding (sub) MIME value.
findMultipartNamed :: Text -> MIMEValue -> Maybe MIMEValue
findMultipartNamed nm mv =
case mime_val_content mv of
Multi ms -> msum (map (findMultipartNamed nm) ms)
Single {} -> do cd <- mime_val_disp mv
_ <- find (withDispName nm) (dispParams cd)
return mv
where withDispName a (Name b) = a == b
withDispName _ _ = False
|
