decompress package:MissingH

decompress :: String -> (String, Maybe GZipError)
MissingH System.FileArchive.GZip
Read a GZip file, decompressing all sections that are found. Returns a decompresed data stream and Nothing, or an unreliable string and Just (error). If you get anything other than Nothing, the String returned should be discarded.
hDecompress :: Handle -> Handle -> IO (Maybe GZipError)
MissingH System.FileArchive.GZip
Read a GZip file, decompressing all sections found. Writes the decompressed data stream to the given output handle. Returns Nothing if the action was successful, or Just GZipError if there was a problem. If there was a problem, the data written to the output handle should be discarded.