convert WebDAV to new special remote interface, adding new-style chunking support
Reusing http connection when operating on chunks is not done yet, I had to submit some patches to DAV to support that. However, this is no slower than old-style chunking was. Note that it's a fileRetriever and a fileStorer, despite DAV using bytestrings that would allow streaming. As a result, upload/download of encrypted files is made a bit more expensive, since it spools them to temp files. This was needed to get the progress meters to work. There are probably ways to avoid that.. But it turns out that the current DAV interface buffers the whole file content in memory, and I have sent in a patch to DAV to improve its interfaces. Using the new interfaces, it's certainly going to need to be a fileStorer, in order to read the file size from the file (getting the size of a bytestring would destroy laziness). It should be possible to use the new interface to make it be a byteRetriever, so I'll change that when I get to it. This commit was sponsored by Andreas Olsson.
This commit is contained in:
Joey Hess
parent
8025decc7f
commit
aacb0b2823
5 changed files with 50 additions and 118 deletions
122
Remote/WebDAV.hs
122
Remote/WebDAV.hs
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@ -27,12 +27,9 @@ import qualified Git
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import Config
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import Config.Cost
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import Remote.Helper.Special
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import Remote.Helper.Encryptable
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import qualified Remote.Helper.Chunked.Legacy as Legacy
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import Crypto
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import Creds
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import Utility.Metered
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import Annex.Content
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import Annex.UUID
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import Remote.WebDAV.DavUrl
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@ -50,20 +47,22 @@ remote = RemoteType {
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gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
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gen r u c gc = new <$> remoteCost gc expensiveRemoteCost
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where
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new cst = Just $ encryptableRemote c
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(storeEncrypted this)
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(retrieveEncrypted this)
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new cst = Just $ specialRemote c
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(prepareStore this chunkconfig)
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(prepareRetrieve this chunkconfig)
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(prepareRemove this)
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(prepareCheckPresent this chunkconfig)
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this
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where
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this = Remote {
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uuid = u,
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cost = cst,
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name = Git.repoDescribe r,
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storeKey = store this,
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retrieveKeyFile = retrieve this,
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retrieveKeyFileCheap = retrieveCheap this,
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removeKey = remove this,
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checkPresent = checkKey this,
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storeKey = storeKeyDummy,
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retrieveKeyFile = retreiveKeyFileDummy,
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retrieveKeyFileCheap = retrieveCheap,
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removeKey = removeKeyDummy,
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checkPresent = checkPresentDummy,
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checkPresentCheap = False,
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whereisKey = Nothing,
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remoteFsck = Nothing,
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@ -76,6 +75,7 @@ gen r u c gc = new <$> remoteCost gc expensiveRemoteCost
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availability = GloballyAvailable,
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remotetype = remote
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}
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chunkconfig = getChunkConfig c
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webdavSetup :: Maybe UUID -> Maybe CredPair -> RemoteConfig -> Annex (RemoteConfig, UUID)
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webdavSetup mu mcreds c = do
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@ -89,95 +89,67 @@ webdavSetup mu mcreds c = do
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c'' <- setRemoteCredPair c' (davCreds u) creds
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return (c'', u)
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store :: Remote -> Key -> AssociatedFile -> MeterUpdate -> Annex Bool
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store r k _f p = metered (Just p) k $ \meterupdate ->
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davAction r False $ \(baseurl, user, pass) ->
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sendAnnex k (void $ remove r k) $ \src ->
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liftIO $ withMeteredFile src meterupdate $
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storeHelper r k baseurl user pass
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prepareStore :: Remote -> ChunkConfig -> Preparer Storer
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prepareStore r chunkconfig = simplyPrepare $ fileStorer $ \k f p ->
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davAction r False $ \(baseurl, user, pass) -> liftIO $
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withMeteredFile f p $
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storeHelper chunkconfig k baseurl user pass
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storeEncrypted :: Remote -> (Cipher, Key) -> Key -> MeterUpdate -> Annex Bool
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storeEncrypted r (cipher, enck) k p = metered (Just p) k $ \meterupdate ->
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davAction r False $ \(baseurl, user, pass) ->
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sendAnnex k (void $ remove r enck) $ \src ->
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liftIO $ encrypt (getGpgEncParams r) cipher
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(streamMeteredFile src meterupdate) $
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readBytes $ storeHelper r enck baseurl user pass
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storeHelper :: Remote -> Key -> DavUrl -> DavUser -> DavPass -> L.ByteString -> IO Bool
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storeHelper r k baseurl user pass b = catchBoolIO $ do
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storeHelper :: ChunkConfig -> Key -> DavUrl -> DavUser -> DavPass -> L.ByteString -> IO Bool
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storeHelper chunkconfig k baseurl user pass b = do
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mkdirRecursiveDAV tmpurl user pass
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case chunkconfig of
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NoChunks -> flip catchNonAsync (\e -> warningIO (show e) >> return False) $ do
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storehttp tmpurl b
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finalizer tmpurl keyurl
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return True
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UnpaddedChunks _ -> error "TODO: storeHelper with UnpaddedChunks"
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LegacyChunks chunksize -> do
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let storer urls = Legacy.storeChunked chunksize urls storehttp b
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let recorder url s = storehttp url (L8.fromString s)
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Legacy.storeChunks k tmpurl keyurl storer recorder finalizer
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_ -> do
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storehttp tmpurl b
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finalizer tmpurl keyurl
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return True
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where
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tmpurl = tmpLocation baseurl k
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keyurl = davLocation baseurl k
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chunkconfig = getChunkConfig $ config r
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finalizer srcurl desturl = do
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void $ tryNonAsync (deleteDAV desturl user pass)
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mkdirRecursiveDAV (urlParent desturl) user pass
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moveDAV srcurl desturl user pass
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storehttp url = putDAV url user pass
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retrieveCheap :: Remote -> Key -> FilePath -> Annex Bool
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retrieveCheap _ _ _ = return False
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retrieveCheap :: Key -> FilePath -> Annex Bool
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retrieveCheap _ _ = return False
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retrieve :: Remote -> Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex Bool
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retrieve r k _f d p = metered (Just p) k $ \meterupdate ->
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davAction r False $ \(baseurl, user, pass) -> liftIO $ catchBoolIO $
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withStoredFiles r k baseurl user pass onerr $ \urls -> do
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Legacy.meteredWriteFileChunks meterupdate d urls $ \url -> do
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prepareRetrieve :: Remote -> ChunkConfig -> Preparer Retriever
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prepareRetrieve r chunkconfig = simplyPrepare $ fileRetriever $ \d k p ->
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davAction r onerr $ \(baseurl, user, pass) -> liftIO $
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withStoredFiles chunkconfig k baseurl user pass onerr $ \urls -> do
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Legacy.meteredWriteFileChunks p d urls $ \url -> do
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mb <- getDAV url user pass
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case mb of
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Nothing -> throwIO "download failed"
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Nothing -> onerr
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Just b -> return b
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return True
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where
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onerr _ = return False
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onerr = error "download failed"
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retrieveEncrypted :: Remote -> (Cipher, Key) -> Key -> FilePath -> MeterUpdate -> Annex Bool
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retrieveEncrypted r (cipher, enck) k d p = metered (Just p) k $ \meterupdate ->
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davAction r False $ \(baseurl, user, pass) -> liftIO $ catchBoolIO $
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withStoredFiles r enck baseurl user pass onerr $ \urls -> do
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decrypt cipher (feeder user pass urls) $
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readBytes $ meteredWriteFile meterupdate d
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return True
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where
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onerr _ = return False
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prepareRemove :: Remote -> Preparer Remover
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prepareRemove r = simplyPrepare $ \k ->
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davAction r False $ \(baseurl, user, pass) -> liftIO $ do
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-- Delete the key's whole directory, including any
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-- legacy chunked files, etc, in a single action.
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let url = davLocation baseurl k
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isJust . eitherToMaybe <$> tryNonAsync (deleteDAV url user pass)
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feeder _ _ [] _ = noop
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feeder user pass (url:urls) h = do
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mb <- getDAV url user pass
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case mb of
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Nothing -> throwIO "download failed"
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Just b -> do
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L.hPut h b
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feeder user pass urls h
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prepareCheckPresent :: Remote -> ChunkConfig -> Preparer CheckPresent
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prepareCheckPresent r chunkconfig = simplyPrepare $ checkKey r chunkconfig
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remove :: Remote -> Key -> Annex Bool
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remove r k = davAction r False $ \(baseurl, user, pass) -> liftIO $ do
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-- Delete the key's whole directory, including any chunked
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-- files, etc, in a single action.
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let url = davLocation baseurl k
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isJust . eitherToMaybe <$> tryNonAsync (deleteDAV url user pass)
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checkKey :: Remote -> Key -> Annex Bool
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checkKey r k = davAction r noconn (either error id <$$> go)
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checkKey :: Remote -> ChunkConfig -> Key -> Annex Bool
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checkKey r chunkconfig k = davAction r noconn (either error id <$$> go)
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where
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noconn = error $ name r ++ " not configured"
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go (baseurl, user, pass) = do
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showAction $ "checking " ++ name r
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liftIO $ withStoredFiles r k baseurl user pass onerr check
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liftIO $ withStoredFiles chunkconfig k baseurl user pass onerr check
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where
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check [] = return $ Right True
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check (url:urls) = do
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@ -196,7 +168,7 @@ checkKey r k = davAction r noconn (either error id <$$> go)
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else v
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withStoredFiles
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:: Remote
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:: ChunkConfig
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-> Key
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-> DavUrl
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-> DavUser
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@ -204,9 +176,7 @@ withStoredFiles
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-> (DavUrl -> IO a)
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-> ([DavUrl] -> IO a)
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-> IO a
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withStoredFiles r k baseurl user pass onerr a = case chunkconfig of
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NoChunks -> a [keyurl]
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UnpaddedChunks _ -> error "TODO: withStoredFiles with UnpaddedChunks"
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withStoredFiles chunkconfig k baseurl user pass onerr a = case chunkconfig of
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LegacyChunks _ -> do
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let chunkcount = keyurl ++ Legacy.chunkCount
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v <- getDAV chunkcount user pass
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@ -217,9 +187,9 @@ withStoredFiles r k baseurl user pass onerr a = case chunkconfig of
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if null chunks
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then onerr chunkcount
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else a chunks
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_ -> a [keyurl]
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where
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keyurl = davLocation baseurl k ++ keyFile k
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chunkconfig = getChunkConfig $ config r
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davAction :: Remote -> a -> ((DavUrl, DavUser, DavPass) -> Annex a) -> Annex a
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davAction r unconfigured action = do
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