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|
{- git-annex URL contents
-
- Copyright 2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Types.UrlContents (
UrlContents(..),
SafeFilePath,
mkSafeFilePath,
fromSafeFilePath
) where
import Utility.Url
import Utility.Path
import System.FilePath
data UrlContents
-- An URL contains a file, whose size may be known.
-- There might be a nicer filename to use.
= UrlContents (Maybe Integer) (Maybe SafeFilePath)
-- Sometimes an URL points to multiple files, each accessible
-- by their own URL.
| UrlMulti [(URLString, Maybe Integer, SafeFilePath)]
-- This is a FilePath, from an untrusted source,
-- sanitized so it doesn't contain any directory traversal tricks
-- and is always relative. It can still contain subdirectories.
-- Any unusual characters are also filtered out.
newtype SafeFilePath = SafeFilePath FilePath
deriving (Show)
mkSafeFilePath :: FilePath -> SafeFilePath
mkSafeFilePath p = SafeFilePath $ if null p' then "file" else p'
where
p' = joinPath $ filter safe $ map sanitizeFilePath $ splitDirectories p
safe s
| isDrive s = False
| s == ".." = False
| s == ".git" = False
| null s = False
| otherwise = True
fromSafeFilePath :: SafeFilePath -> FilePath
fromSafeFilePath (SafeFilePath p) = p
|
