e880d0d22c
Only fsck and reinject and the test suite used the Backend, and they can look it up as needed from the Key. This simplifies the code and also speeds it up. There is a small behavior change here. Before, all commands would warn when acting on an annexed file with an unknown backend. Now, only fsck and reinject show that warning.
241 lines
7.7 KiB
Haskell
241 lines
7.7 KiB
Haskell
{- git-annex command
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-
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- Copyright 2011-2013 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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{-# LANGUAGE CPP #-}
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module Command.AddUrl where
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import Network.URI
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import Common.Annex
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import Command
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import Backend
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import qualified Command.Add
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import qualified Annex
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import qualified Annex.Queue
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import qualified Annex.Url as Url
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import qualified Backend.URL
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import Annex.Content
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import Logs.Web
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import Types.Key
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import Types.KeySource
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import Config
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import Annex.Content.Direct
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import Logs.Location
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import qualified Annex.Transfer as Transfer
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#ifdef WITH_QUVI
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import Annex.Quvi
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import qualified Utility.Quvi as Quvi
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#endif
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def :: [Command]
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def = [notBareRepo $ withOptions [fileOption, pathdepthOption, relaxedOption] $
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command "addurl" (paramRepeating paramUrl) seek
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SectionCommon "add urls to annex"]
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fileOption :: Option
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fileOption = fieldOption [] "file" paramFile "specify what file the url is added to"
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pathdepthOption :: Option
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pathdepthOption = fieldOption [] "pathdepth" paramNumber "path components to use in filename"
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relaxedOption :: Option
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relaxedOption = flagOption [] "relaxed" "skip size check"
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seek :: CommandSeek
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seek ps = do
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f <- getOptionField fileOption return
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relaxed <- getOptionFlag relaxedOption
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d <- getOptionField pathdepthOption (return . maybe Nothing readish)
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withStrings (start relaxed f d) ps
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start :: Bool -> Maybe FilePath -> Maybe Int -> String -> CommandStart
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start relaxed optfile pathdepth s = go $ fromMaybe bad $ parseURI s
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where
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(s', downloader) = getDownloader s
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bad = fromMaybe (error $ "bad url " ++ s') $
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parseURI $ escapeURIString isUnescapedInURI s'
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choosefile = flip fromMaybe optfile
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go url = case downloader of
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QuviDownloader -> usequvi
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DefaultDownloader ->
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#ifdef WITH_QUVI
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ifM (quviSupported s')
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( usequvi
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, regulardownload url
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)
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#else
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regulardownload url
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#endif
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regulardownload url = do
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pathmax <- liftIO $ fileNameLengthLimit "."
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let file = choosefile $ url2file url pathdepth pathmax
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showStart "addurl" file
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next $ perform relaxed s' file
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#ifdef WITH_QUVI
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badquvi = error $ "quvi does not know how to download url " ++ s'
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usequvi = do
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page <- fromMaybe badquvi
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<$> withQuviOptions Quvi.forceQuery [Quvi.quiet, Quvi.httponly] s'
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let link = fromMaybe badquvi $ headMaybe $ Quvi.pageLinks page
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pathmax <- liftIO $ fileNameLengthLimit "."
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let file = choosefile $ truncateFilePath pathmax $ sanitizeFilePath $
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Quvi.pageTitle page ++ "." ++ Quvi.linkSuffix link
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showStart "addurl" file
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next $ performQuvi relaxed s' (Quvi.linkUrl link) file
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#else
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usequvi = error "not built with quvi support"
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#endif
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#ifdef WITH_QUVI
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performQuvi :: Bool -> URLString -> URLString -> FilePath -> CommandPerform
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performQuvi relaxed pageurl videourl file = ifAnnexed file addurl geturl
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where
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quviurl = setDownloader pageurl QuviDownloader
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addurl key = next $ cleanup quviurl file key Nothing
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geturl = next $ addUrlFileQuvi relaxed quviurl videourl file
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#endif
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#ifdef WITH_QUVI
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addUrlFileQuvi :: Bool -> URLString -> URLString -> FilePath -> Annex Bool
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addUrlFileQuvi relaxed quviurl videourl file = do
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key <- Backend.URL.fromUrl quviurl Nothing
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ifM (pure relaxed <||> Annex.getState Annex.fast)
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( cleanup quviurl file key Nothing
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, do
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{- Get the size, and use that to check
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- disk space. However, the size info is not
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- retained, because the size of a video stream
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- might change and we want to be able to download
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- it later. -}
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sizedkey <- addSizeUrlKey videourl key
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prepGetViaTmpChecked sizedkey $ do
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tmp <- fromRepo $ gitAnnexTmpObjectLocation key
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showOutput
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ok <- Transfer.notifyTransfer Transfer.Download (Just file) $
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Transfer.download webUUID key (Just file) Transfer.forwardRetry $ const $ do
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liftIO $ createDirectoryIfMissing True (parentDir tmp)
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downloadUrl [videourl] tmp
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if ok
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then cleanup quviurl file key (Just tmp)
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else return False
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)
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#endif
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perform :: Bool -> URLString -> FilePath -> CommandPerform
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perform relaxed url file = ifAnnexed file addurl geturl
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where
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geturl = next $ addUrlFile relaxed url file
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addurl key
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| relaxed = do
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setUrlPresent key url
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next $ return True
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| otherwise = ifM (elem url <$> getUrls key)
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( stop
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, do
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(exists, samesize) <- Url.withUrlOptions $ Url.check url (keySize key)
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if exists && samesize
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then do
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setUrlPresent key url
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next $ return True
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else do
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warning $ "while adding a new url to an already annexed file, " ++ if exists
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then "url does not have expected file size (use --relaxed to bypass this check) " ++ url
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else "failed to verify url exists: " ++ url
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stop
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)
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addUrlFile :: Bool -> URLString -> FilePath -> Annex Bool
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addUrlFile relaxed url file = do
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liftIO $ createDirectoryIfMissing True (parentDir file)
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ifM (Annex.getState Annex.fast <||> pure relaxed)
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( nodownload relaxed url file
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, do
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showAction $ "downloading " ++ url ++ " "
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download url file
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)
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download :: URLString -> FilePath -> Annex Bool
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download url file = do
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{- Generate a dummy key to use for this download, before we can
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- examine the file and find its real key. This allows resuming
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- downloads, as the dummy key for a given url is stable. -}
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dummykey <- addSizeUrlKey url =<< Backend.URL.fromUrl url Nothing
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prepGetViaTmpChecked dummykey $ do
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tmp <- fromRepo $ gitAnnexTmpObjectLocation dummykey
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showOutput
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ifM (runtransfer dummykey tmp)
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( do
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backend <- chooseBackend file
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let source = KeySource
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{ keyFilename = file
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, contentLocation = tmp
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, inodeCache = Nothing
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}
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k <- genKey source backend
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case k of
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Nothing -> return False
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Just (key, _) -> cleanup url file key (Just tmp)
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, return False
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)
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where
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runtransfer dummykey tmp = Transfer.notifyTransfer Transfer.Download (Just file) $
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Transfer.download webUUID dummykey (Just file) Transfer.forwardRetry $ const $ do
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liftIO $ createDirectoryIfMissing True (parentDir tmp)
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downloadUrl [url] tmp
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{- Hits the url to get the size, if available.
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-
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- This is needed to avoid exceeding the diskreserve when downloading,
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- and so the assistant can display a pretty progress bar.
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-}
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addSizeUrlKey :: URLString -> Key -> Annex Key
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addSizeUrlKey url key = do
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size <- snd <$> Url.withUrlOptions (Url.exists url)
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return $ key { keySize = size }
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cleanup :: URLString -> FilePath -> Key -> Maybe FilePath -> Annex Bool
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cleanup url file key mtmp = do
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when (isJust mtmp) $
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logStatus key InfoPresent
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setUrlPresent key url
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Command.Add.addLink file key Nothing
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whenM isDirect $ do
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void $ addAssociatedFile key file
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{- For moveAnnex to work in direct mode, the symlink
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- must already exist, so flush the queue. -}
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Annex.Queue.flush
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maybe noop (moveAnnex key) mtmp
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return True
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nodownload :: Bool -> URLString -> FilePath -> Annex Bool
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nodownload relaxed url file = do
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(exists, size) <- if relaxed
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then pure (True, Nothing)
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else Url.withUrlOptions (Url.exists url)
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if exists
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then do
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key <- Backend.URL.fromUrl url size
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cleanup url file key Nothing
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else do
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warning $ "unable to access url: " ++ url
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return False
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url2file :: URI -> Maybe Int -> Int -> FilePath
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url2file url pathdepth pathmax = case pathdepth of
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Nothing -> truncateFilePath pathmax $ sanitizeFilePath fullurl
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Just depth
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| depth >= length urlbits -> frombits id
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| depth > 0 -> frombits $ drop depth
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| depth < 0 -> frombits $ reverse . take (negate depth) . reverse
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| otherwise -> error "bad --pathdepth"
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where
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fullurl = uriRegName auth ++ uriPath url ++ uriQuery url
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frombits a = intercalate "/" $ a urlbits
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urlbits = map (truncateFilePath pathmax . sanitizeFilePath) $
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filter (not . null) $ split "/" fullurl
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auth = fromMaybe (error $ "bad url " ++ show url) $ uriAuthority url
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