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|
{- git-annex command
-
- Copyright 2012 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.TransferInfo where
import Command
import Annex.Content
import Types.Transfer
import Logs.Transfer
import qualified CmdLine.GitAnnexShell.Fields as Fields
import Utility.Metered
import Utility.SimpleProtocol
cmd :: Command
cmd = noCommit $
command "transferinfo" SectionPlumbing
"updates sender on number of bytes of content received"
paramKey (withParams seek)
seek :: CmdParams -> CommandSeek
seek = withWords start
{- Security:
-
- The transfer info file contains the user-supplied key, but
- the built-in guards prevent slashes in it from showing up in the filename.
- It also contains the UUID of the remote. But slashes are also filtered
- out of that when generating the filename.
-
- Checks that the key being transferred is inAnnex, to prevent
- malicious spamming of bogus keys. Does not check that a transfer
- of the key is actually in progress, because this could be started
- concurrently with sendkey, and win the race.
-}
start :: [String] -> CommandStart
start (k:[]) = do
case file2key k of
Nothing -> error "bad key"
(Just key) -> whenM (inAnnex key) $ do
afile <- AssociatedFile <$> Fields.getField Fields.associatedFile
u <- maybe (error "missing remoteuuid") toUUID
<$> Fields.getField Fields.remoteUUID
let t = Transfer
{ transferDirection = Upload
, transferUUID = u
, transferKey = key
}
tinfo <- liftIO $ startTransferInfo afile
(update, tfile, _) <- mkProgressUpdater t tinfo
liftIO $ mapM_ void
[ tryIO $ forever $ do
bytes <- readUpdate
maybe (error "transferinfo protocol error")
(update . toBytesProcessed) bytes
, tryIO $ removeFile tfile
, exitSuccess
]
stop
start _ = giveup "wrong number of parameters"
readUpdate :: IO (Maybe Integer)
readUpdate = maybe Nothing readish <$> getProtocolLine stdin
|
