40ecf58d4bThis does not change the overall license of the git-annex program, which was already AGPL due to a number of sources files being AGPL already. Legally speaking, I'm adding a new license under which these files are now available; I already released their current contents under the GPL license. Now they're dual licensed GPL and AGPL. However, I intend for all my future changes to these files to only be released under the AGPL license, and I won't be tracking the dual licensing status, so I'm simply changing the license statement to say it's AGPL. (In some cases, others wrote parts of the code of a file and released it under the GPL; but in all cases I have contributed a significant portion of the code in each file and it's that code that is getting the AGPL license; the GPL license of other contributors allows combining with AGPL code.)
130 lines
3.6 KiB
Haskell
130 lines
3.6 KiB
Haskell
{- git-annex command, used internally by assistant
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-
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- Copyright 2012, 2013 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE TypeSynonymInstances, FlexibleInstances #-}
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module Command.TransferKeys where
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import Command
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import Annex.Content
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import Logs.Location
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import Annex.Transfer
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import qualified Remote
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import Utility.SimpleProtocol (dupIoHandles)
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import Git.Types (RemoteName)
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import qualified Database.Keys
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data TransferRequest = TransferRequest Direction Remote Key AssociatedFile
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cmd :: Command
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cmd = command "transferkeys" SectionPlumbing "transfers keys"
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paramNothing (withParams seek)
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seek :: CmdParams -> CommandSeek
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seek = withNothing (commandAction start)
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start :: CommandStart
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start = do
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(readh, writeh) <- liftIO dupIoHandles
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runRequests readh writeh runner
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stop
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where
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runner (TransferRequest direction remote key file)
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| direction == Upload = notifyTransfer direction file $
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upload (Remote.uuid remote) key file stdRetry $ \p -> do
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ok <- Remote.storeKey remote key file p
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when ok $
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Remote.logStatus remote key InfoPresent
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return ok
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| otherwise = notifyTransfer direction file $
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download (Remote.uuid remote) key file stdRetry $ \p ->
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getViaTmp (Remote.retrievalSecurityPolicy remote) (RemoteVerify remote) key $ \t -> do
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r <- Remote.retrieveKeyFile remote key file t p
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-- Make sure we get the current
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-- associated files data for the key,
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-- not old cached data.
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Database.Keys.closeDb
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return r
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runRequests
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:: Handle
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-> Handle
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-> (TransferRequest -> Annex Bool)
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-> Annex ()
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runRequests readh writeh a = do
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liftIO $ hSetBuffering readh NoBuffering
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go =<< readrequests
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where
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go (d:rn:k:f:rest) = do
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case (deserialize d, deserialize rn, deserialize k, deserialize f) of
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(Just direction, Just remotename, Just key, Just file) -> do
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mremote <- Remote.byName' remotename
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case mremote of
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Left _ -> sendresult False
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Right remote -> sendresult =<< a
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(TransferRequest direction remote key file)
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_ -> sendresult False
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go rest
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go [] = noop
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go [""] = noop
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go v = error $ "transferkeys protocol error: " ++ show v
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readrequests = liftIO $ split fieldSep <$> hGetContents readh
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sendresult b = liftIO $ do
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hPutStrLn writeh $ serialize b
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hFlush writeh
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sendRequest :: Transfer -> TransferInfo -> Handle -> IO ()
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sendRequest t tinfo h = do
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hPutStr h $ intercalate fieldSep
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[ serialize (transferDirection t)
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, maybe (serialize ((fromUUID (transferUUID t)) :: String))
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(serialize . Remote.name)
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(transferRemote tinfo)
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, serialize (transferKey t)
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, serialize (associatedFile tinfo)
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, "" -- adds a trailing null
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]
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hFlush h
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readResponse :: Handle -> IO Bool
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readResponse h = fromMaybe False . deserialize <$> hGetLine h
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fieldSep :: String
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fieldSep = "\0"
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class TCSerialized a where
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serialize :: a -> String
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deserialize :: String -> Maybe a
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instance TCSerialized Bool where
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serialize True = "1"
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serialize False = "0"
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deserialize "1" = Just True
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deserialize "0" = Just False
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deserialize _ = Nothing
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instance TCSerialized Direction where
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serialize Upload = "u"
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serialize Download = "d"
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deserialize "u" = Just Upload
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deserialize "d" = Just Download
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deserialize _ = Nothing
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instance TCSerialized AssociatedFile where
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serialize (AssociatedFile (Just f)) = f
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serialize (AssociatedFile Nothing) = ""
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deserialize "" = Just (AssociatedFile Nothing)
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deserialize f = Just (AssociatedFile (Just f))
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instance TCSerialized RemoteName where
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serialize n = n
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deserialize n = Just n
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instance TCSerialized Key where
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serialize = serializeKey
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deserialize = deserializeKey
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