41 lines
870 B
Haskell
41 lines
870 B
Haskell
{- git-annex "URL" backend -- keys whose content is available from urls.
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-
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- Copyright 2011 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Backend.URL (
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backends,
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fromUrl
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) where
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import Data.Hash.MD5
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import Common.Annex
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import Types.Backend
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import Types.Key
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backends :: [Backend]
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backends = [backend]
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backend :: Backend
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backend = Backend
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{ name = "URL"
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, getKey = const $ return Nothing
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, fsckKey = Nothing
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}
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fromUrl :: String -> Maybe Integer -> Key
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fromUrl url size = stubKey
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{ keyName = key
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, keyBackendName = "URL"
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, keySize = size
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}
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where
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-- when it's not too long, use the url as the key name
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-- 256 is the absolute filename max, but use a shorter
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-- length because this is not the entire key filename.
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key
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| length url < 128 = url
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| otherwise = take 128 url ++ "-" ++ md5s (Str url)
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