271ea49978
Currently only the web special remote is readonly, but it'd be possible to also have readonly drives, or other remotes. These are handled in the assistant by only downloading from them, and never trying to upload to them.
89 lines
2.1 KiB
Haskell
89 lines
2.1 KiB
Haskell
{- Web remotes.
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-
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- Copyright 2011 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Remote.Web (remote) where
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import Common.Annex
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import Types.Remote
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import qualified Git
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import qualified Git.Construct
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import Annex.Content
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import Config
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import Logs.Web
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import qualified Utility.Url as Url
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import Types.Key
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remote :: RemoteType
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remote = RemoteType {
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typename = "web",
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enumerate = list,
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generate = gen,
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setup = error "not supported"
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}
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-- There is only one web remote, and it always exists.
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-- (If the web should cease to exist, remove this module and redistribute
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-- a new release to the survivors by carrier pigeon.)
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list :: Annex [Git.Repo]
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list = do
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r <- liftIO $ Git.Construct.remoteNamed "web" Git.Construct.fromUnknown
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return [r]
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gen :: Git.Repo -> UUID -> Maybe RemoteConfig -> Annex Remote
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gen r _ _ =
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return Remote {
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uuid = webUUID,
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cost = expensiveRemoteCost,
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name = Git.repoDescribe r,
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storeKey = uploadKey,
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retrieveKeyFile = downloadKey,
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retrieveKeyFileCheap = downloadKeyCheap,
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removeKey = dropKey,
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hasKey = checkKey,
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hasKeyCheap = False,
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whereisKey = Just getUrls,
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config = Nothing,
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localpath = Nothing,
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repo = r,
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readonly = True,
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remotetype = remote
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}
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downloadKey :: Key -> AssociatedFile -> FilePath -> Annex Bool
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downloadKey key _file dest = get =<< getUrls key
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where
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get [] = do
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warning "no known url"
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return False
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get urls = do
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showOutput -- make way for download progress bar
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downloadUrl urls dest
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downloadKeyCheap :: Key -> FilePath -> Annex Bool
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downloadKeyCheap _ _ = return False
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uploadKey :: Key -> AssociatedFile -> Annex Bool
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uploadKey _ _ = do
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warning "upload to web not supported"
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return False
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dropKey :: Key -> Annex Bool
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dropKey _ = do
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warning "removal from web not supported"
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return False
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checkKey :: Key -> Annex (Either String Bool)
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checkKey key = do
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us <- getUrls key
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if null us
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then return $ Right False
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else return . Right =<< checkKey' key us
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checkKey' :: Key -> [URLString] -> Annex Bool
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checkKey' key us = untilTrue us $ \u -> do
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showAction $ "checking " ++ u
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headers <- getHttpHeaders
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liftIO $ Url.check u headers (keySize key)
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