git-annex/Remote/Web.hs
Joey Hess cf07a2c412 webapp: Progess bar fixes for many types of special remotes.
There was confusion in different parts of the progress bar code about
whether an update contained the total number of bytes transferred, or the
number of bytes transferred since the last update. One way this bug
showed up was progress bars that seemed to stick at zero for a long time.
In order to fix it comprehensively, I add a new BytesProcessed data type,
that is explicitly a total quantity of bytes, not a delta.

Note that this doesn't necessarily fix every problem with progress bars.
Particularly, buffering can now cause progress bars to seem to run ahead
of transfers, reaching 100% when data is still being uploaded.
2013-03-28 17:04:37 -04:00

95 lines
2.3 KiB
Haskell

{- Web remotes.
-
- Copyright 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Remote.Web (remote) where
import Common.Annex
import Types.Remote
import qualified Git
import qualified Git.Construct
import Annex.Content
import Config
import Config.Cost
import Logs.Web
import qualified Utility.Url as Url
import Types.Key
import Utility.Metered
import qualified Data.Map as M
remote :: RemoteType
remote = RemoteType {
typename = "web",
enumerate = list,
generate = gen,
setup = error "not supported"
}
-- There is only one web remote, and it always exists.
-- (If the web should cease to exist, remove this module and redistribute
-- a new release to the survivors by carrier pigeon.)
list :: Annex [Git.Repo]
list = do
r <- liftIO $ Git.Construct.remoteNamed "web" Git.Construct.fromUnknown
return [r]
gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex Remote
gen r _ _ gc =
return Remote {
uuid = webUUID,
cost = expensiveRemoteCost,
name = Git.repoDescribe r,
storeKey = uploadKey,
retrieveKeyFile = downloadKey,
retrieveKeyFileCheap = downloadKeyCheap,
removeKey = dropKey,
hasKey = checkKey,
hasKeyCheap = False,
whereisKey = Just getUrls,
config = M.empty,
gitconfig = gc,
localpath = Nothing,
repo = r,
readonly = True,
globallyAvailable = True,
remotetype = remote
}
downloadKey :: Key -> AssociatedFile -> FilePath -> Annex Bool
downloadKey key _file dest = get =<< getUrls key
where
get [] = do
warning "no known url"
return False
get urls = do
showOutput -- make way for download progress bar
downloadUrl urls dest
downloadKeyCheap :: Key -> FilePath -> Annex Bool
downloadKeyCheap _ _ = return False
uploadKey :: Key -> AssociatedFile -> MeterUpdate -> Annex Bool
uploadKey _ _ _ = do
warning "upload to web not supported"
return False
dropKey :: Key -> Annex Bool
dropKey k = do
mapM_ (setUrlMissing k) =<< getUrls k
return True
checkKey :: Key -> Annex (Either String Bool)
checkKey key = do
us <- getUrls key
if null us
then return $ Right False
else return . Right =<< checkKey' key us
checkKey' :: Key -> [URLString] -> Annex Bool
checkKey' key us = untilTrue us $ \u -> do
showAction $ "checking " ++ u
headers <- getHttpHeaders
liftIO $ Url.check u headers (keySize key)