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我在嘗試反序列化對象時遇到此錯誤。Haskell中的通用序列化
Amy64.hs: GetException "too few bytes\nFrom:\tdemandInput\n\n"
創建輸出文件,看起來像這樣:
00000000 1f 8b 08 00 00 00 00 00 04 03 63 60 00 03 56 a7 |..........c`..V.|
00000010 d2 f4 e2 4a 00 be b2 38 41 0d 00 00 00 |...J...8A....|
我懷疑我使用的是新的仿製藥的東西不正確。這是我的代碼。順便說一句,如果我刪除第9,22和23行,我會得到相同的結果。如果我刪除gzip/ungzip的東西,我會得到相同的結果。
{-# LANGUAGE DeriveGeneriC#-}
import Data.Conduit (runResourceT, ($$), (=$))
import Data.Conduit.Binary (sinkFile, sourceFile)
import Data.Conduit.Cereal (sinkGet, sourcePut)
import Data.Conduit.Zlib (gzip, ungzip)
import qualified Data.Serialize as DS (Serialize, get, put)
import GHC.Generics (Generic)
import Data.Serialize.Derive (derivePut, deriveGet) -- line 9
readBug :: FilePath -> IO (Either String Bug)
readBug f =
runResourceT $ sourceFile f $$ ungzip =$ sinkGet (DS.get)
writeBug :: FilePath -> Bug -> IO()
writeBug f t =
runResourceT $ sourcePut (DS.put t) $$ gzip =$ sinkFile f
data Bug = Bug String deriving (Show, Generic)
instance DS.Serialize Bug where
put = derivePut -- line 22
get = deriveGet -- line 23
main = do
let a = Bug "Bugsy"
writeBug "x.dat" a
(Right b) <- readBug "x.dat" :: IO (Either String Bug)
print b