411 lines
13 KiB
Haskell
411 lines
13 KiB
Haskell
{- git-annex command
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-
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- Copyright 2013-2017 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE OverloadedStrings #-}
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module Command.ImportFeed where
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import Text.Feed.Import
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import Text.Feed.Query
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import Text.Feed.Types
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import qualified Data.Set as S
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import qualified Data.Map as M
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import Data.Time.Clock
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import Data.Time.Format
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import qualified Data.Text as T
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import System.Log.Logger
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import Command
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import qualified Annex
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import qualified Annex.Url as Url
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import qualified Remote
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import qualified Types.Remote as Remote
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import Types.UrlContents
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import Logs.Web
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import Logs.File
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import qualified Utility.Format
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import Utility.Tmp
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import Utility.Metered
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import Command.AddUrl (addUrlFile, downloadRemoteFile, parseDownloadOptions, DownloadOptions(..))
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import Annex.UUID
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import Backend.URL (fromUrl)
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import Annex.Content
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import Annex.YoutubeDl
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import Types.MetaData
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import Logs.MetaData
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import Annex.MetaData
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import Annex.FileMatcher
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import Command.AddUrl (addWorkTree)
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import Annex.UntrustedFilePath
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cmd :: Command
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cmd = notBareRepo $
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command "importfeed" SectionCommon "import files from podcast feeds"
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(paramRepeating paramUrl) (seek <$$> optParser)
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data ImportFeedOptions = ImportFeedOptions
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{ feedUrls :: CmdParams
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, templateOption :: Maybe String
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, downloadOptions :: DownloadOptions
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}
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optParser :: CmdParamsDesc -> Parser ImportFeedOptions
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optParser desc = ImportFeedOptions
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<$> cmdParams desc
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<*> optional (strOption
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( long "template" <> metavar paramFormat
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<> help "template for filenames"
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))
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<*> parseDownloadOptions False
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seek :: ImportFeedOptions -> CommandSeek
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seek o = do
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addunlockedmatcher <- addUnlockedMatcher
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cache <- getCache (templateOption o)
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forM_ (feedUrls o) (getFeed addunlockedmatcher o cache)
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getFeed :: AddUnlockedMatcher -> ImportFeedOptions -> Cache -> URLString -> CommandSeek
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getFeed addunlockedmatcher opts cache url = do
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showStart' "importfeed" (Just url)
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downloadFeed url >>= \case
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Nothing -> showEndResult =<< feedProblem url
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"downloading the feed failed"
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Just feedcontent -> case parseFeedString feedcontent of
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Nothing -> debugfeedcontent feedcontent "parsing the feed failed"
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Just f -> case findDownloads url f of
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[] -> debugfeedcontent feedcontent "bad feed content; no enclosures to download"
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l -> do
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showEndOk
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ifM (and <$> mapM (performDownload addunlockedmatcher opts cache) l)
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( clearFeedProblem url
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, void $ feedProblem url
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"problem downloading some item(s) from feed"
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)
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where
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debugfeedcontent feedcontent msg = do
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liftIO $ debugM "feed content" $ unlines
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[ "start of feed content"
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, feedcontent
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, "end of feed content"
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]
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showEndResult =<< feedProblem url
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(msg ++ " (use --debug to see the feed content that was downloaded)")
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data ToDownload = ToDownload
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{ feed :: Feed
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, feedurl :: URLString
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, item :: Item
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, location :: DownloadLocation
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}
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data DownloadLocation = Enclosure URLString | MediaLink URLString
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type ItemId = String
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data Cache = Cache
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{ knownurls :: S.Set URLString
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, knownitems :: S.Set ItemId
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, template :: Utility.Format.Format
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}
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getCache :: Maybe String -> Annex Cache
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getCache opttemplate = ifM (Annex.getState Annex.force)
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( ret S.empty S.empty
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, do
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showStart "importfeed" "checking known urls"
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(is, us) <- unzip <$> (mapM knownItems =<< knownUrls)
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showEndOk
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ret (S.fromList us) (S.fromList (concat is))
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)
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where
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tmpl = Utility.Format.gen $ fromMaybe defaultTemplate opttemplate
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ret us is = return $ Cache us is tmpl
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knownItems :: (Key, URLString) -> Annex ([ItemId], URLString)
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knownItems (k, u) = do
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itemids <- S.toList . S.filter (/= noneValue)
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. S.map (decodeBS . fromMetaValue)
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. currentMetaDataValues itemIdField
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<$> getCurrentMetaData k
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return (itemids, u)
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findDownloads :: URLString -> Feed -> [ToDownload]
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findDownloads u f = catMaybes $ map mk (feedItems f)
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where
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mk i = case getItemEnclosure i of
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Just (enclosureurl, _, _) ->
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Just $ ToDownload f u i $ Enclosure $
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T.unpack enclosureurl
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Nothing -> case getItemLink i of
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Just link -> Just $ ToDownload f u i $
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MediaLink $ T.unpack link
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Nothing -> Nothing
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{- Feeds change, so a feed download cannot be resumed. -}
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downloadFeed :: URLString -> Annex (Maybe String)
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downloadFeed url
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| Url.parseURIRelaxed url == Nothing = giveup "invalid feed url"
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| otherwise = withTmpFile "feed" $ \f h -> do
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liftIO $ hClose h
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ifM (Url.withUrlOptions $ Url.download nullMeterUpdate url f)
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( Just <$> liftIO (readFileStrict f)
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, return Nothing
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)
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performDownload :: AddUnlockedMatcher -> ImportFeedOptions -> Cache -> ToDownload -> Annex Bool
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performDownload addunlockedmatcher opts cache todownload = case location todownload of
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Enclosure url -> checkknown url $
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rundownload url (takeWhile (/= '?') $ takeExtension url) $ \f -> do
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r <- Remote.claimingUrl url
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if Remote.uuid r == webUUID || rawOption (downloadOptions opts)
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then do
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let dlopts = (downloadOptions opts)
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-- force using the filename
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-- chosen here
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{ fileOption = Just f
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-- don't use youtube-dl
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, rawOption = True
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}
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let go urlinfo = maybeToList <$> addUrlFile addunlockedmatcher dlopts url urlinfo f
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if relaxedOption (downloadOptions opts)
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then go Url.assumeUrlExists
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else Url.withUrlOptions (Url.getUrlInfo url) >>= \case
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Right urlinfo -> go urlinfo
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Left err -> do
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warning err
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return []
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else do
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res <- tryNonAsync $ maybe
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(error $ "unable to checkUrl of " ++ Remote.name r)
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(flip id url)
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(Remote.checkUrl r)
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case res of
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Left _ -> return []
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Right (UrlContents sz _) ->
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maybeToList <$>
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downloadRemoteFile addunlockedmatcher r (downloadOptions opts) url f sz
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Right (UrlMulti l) -> do
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kl <- forM l $ \(url', sz, subf) ->
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downloadRemoteFile addunlockedmatcher r (downloadOptions opts) url' (f </> sanitizeFilePath subf) sz
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return $ if all isJust kl
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then catMaybes kl
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else []
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MediaLink linkurl -> do
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let mediaurl = setDownloader linkurl YoutubeDownloader
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let mediakey = Backend.URL.fromUrl mediaurl Nothing
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-- Old versions of git-annex that used quvi might have
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-- used the quviurl for this, so check if it's known
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-- to avoid adding it a second time.
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let quviurl = setDownloader linkurl QuviDownloader
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checkknown mediaurl $ checkknown quviurl $
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ifM (Annex.getState Annex.fast <||> pure (relaxedOption (downloadOptions opts)))
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( addmediafast linkurl mediaurl mediakey
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, downloadmedia linkurl mediaurl mediakey
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)
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where
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forced = Annex.getState Annex.force
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{- Avoids downloading any items that are already known to be
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- associated with a file in the annex, unless forced. -}
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checkknown url a
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| knownitemid || S.member url (knownurls cache)
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= ifM forced (a, return True)
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| otherwise = a
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knownitemid = case getItemId (item todownload) of
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Just (_, itemid) ->
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S.member (T.unpack itemid) (knownitems cache)
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_ -> False
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rundownload url extension getter = do
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dest <- makeunique url (1 :: Integer) $
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feedFile (template cache) todownload extension
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case dest of
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Nothing -> return True
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Just f -> do
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showStart' "addurl" (Just url)
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ks <- getter f
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if null ks
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then do
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showEndFail
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checkFeedBroken (feedurl todownload)
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else do
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forM_ ks $ \key ->
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ifM (annexGenMetaData <$> Annex.getGitConfig)
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( addMetaData key $ extractMetaData todownload
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, addMetaData key $ minimalMetaData todownload
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)
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showEndOk
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return True
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{- Find a unique filename to save the url to.
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- If the file exists, prefixes it with a number.
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- When forced, the file may already exist and have the same
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- url, in which case Nothing is returned as it does not need
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- to be re-downloaded. -}
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makeunique url n file = ifM alreadyexists
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( ifM forced
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( ifAnnexed (toRawFilePath f) checksameurl tryanother
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, tryanother
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)
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, return $ Just f
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)
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where
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f = if n < 2
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then file
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else
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let (d, base) = splitFileName file
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in d </> show n ++ "_" ++ base
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tryanother = makeunique url (n + 1) file
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alreadyexists = liftIO $ isJust <$> catchMaybeIO (getSymbolicLinkStatus f)
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checksameurl k = ifM (elem url <$> getUrls k)
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( return Nothing
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, tryanother
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)
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downloadmedia linkurl mediaurl mediakey
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| rawOption (downloadOptions opts) = downloadlink
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| otherwise = do
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r <- withTmpWorkDir mediakey $ \workdir -> do
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dl <- youtubeDl linkurl workdir
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case dl of
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Right (Just mediafile) -> do
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let ext = case takeExtension mediafile of
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[] -> ".m"
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s -> s
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ok <- rundownload linkurl ext $ \f -> do
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addWorkTree addunlockedmatcher webUUID mediaurl f mediakey (Just mediafile)
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return [mediakey]
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return (Just ok)
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-- youtude-dl didn't support it, so
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-- download it as if the link were
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-- an enclosure.
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Right Nothing -> Just <$> downloadlink
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Left msg -> do
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warning msg
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return Nothing
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return (fromMaybe False r)
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where
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downloadlink = performDownload addunlockedmatcher opts cache todownload
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{ location = Enclosure linkurl }
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addmediafast linkurl mediaurl mediakey =
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ifM (pure (not (rawOption (downloadOptions opts)))
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<&&> youtubeDlSupported linkurl)
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( rundownload linkurl ".m" $ \f -> do
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addWorkTree addunlockedmatcher webUUID mediaurl f mediakey Nothing
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return [mediakey]
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, performDownload addunlockedmatcher opts cache todownload
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{ location = Enclosure linkurl }
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)
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defaultTemplate :: String
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defaultTemplate = "${feedtitle}/${itemtitle}${extension}"
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{- Generates a filename to use for a feed item by filling out the template.
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- The filename may not be unique. -}
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feedFile :: Utility.Format.Format -> ToDownload -> String -> FilePath
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feedFile tmpl i extension = Utility.Format.format tmpl $
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M.map sanitizeFilePath $ M.fromList $ extractFields i ++
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[ ("extension", extension)
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, extractField "itempubdate" [pubdate $ item i]
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]
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where
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pubdate itm = case getItemPublishDate itm :: Maybe (Maybe UTCTime) of
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Just (Just d) -> Just $
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formatTime defaultTimeLocale "%F" d
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-- if date cannot be parsed, use the raw string
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_ -> replace "/" "-" . T.unpack
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<$> getItemPublishDateString itm
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extractMetaData :: ToDownload -> MetaData
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extractMetaData i = case getItemPublishDate (item i) :: Maybe (Maybe UTCTime) of
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Just (Just d) -> unionMetaData meta (dateMetaData d meta)
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_ -> meta
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where
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tometa (k, v) = (mkMetaFieldUnchecked (T.pack k), S.singleton (toMetaValue (encodeBS v)))
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meta = MetaData $ M.fromList $ map tometa $ extractFields i
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minimalMetaData :: ToDownload -> MetaData
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minimalMetaData i = case getItemId (item i) of
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(Nothing) -> emptyMetaData
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(Just (_, itemid)) -> MetaData $ M.singleton itemIdField
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(S.singleton $ toMetaValue $ encodeBS $ T.unpack itemid)
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{- Extract fields from the feed and item, that are both used as metadata,
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- and to generate the filename. -}
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extractFields :: ToDownload -> [(String, String)]
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extractFields i = map (uncurry extractField)
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[ ("feedtitle", [feedtitle])
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, ("itemtitle", [itemtitle])
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, ("feedauthor", [feedauthor])
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, ("itemauthor", [itemauthor])
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, ("itemsummary", [T.unpack <$> getItemSummary (item i)])
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, ("itemdescription", [T.unpack <$> getItemDescription (item i)])
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, ("itemrights", [T.unpack <$> getItemRights (item i)])
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, ("itemid", [T.unpack . snd <$> getItemId (item i)])
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, ("title", [itemtitle, feedtitle])
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, ("author", [itemauthor, feedauthor])
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]
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where
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feedtitle = Just $ T.unpack $ getFeedTitle $ feed i
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itemtitle = T.unpack <$> getItemTitle (item i)
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feedauthor = T.unpack <$> getFeedAuthor (feed i)
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itemauthor = T.unpack <$> getItemAuthor (item i)
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itemIdField :: MetaField
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itemIdField = mkMetaFieldUnchecked "itemid"
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extractField :: String -> [Maybe String] -> (String, String)
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extractField k [] = (k, noneValue)
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extractField k (Just v:_)
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| not (null v) = (k, v)
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extractField k (_:rest) = extractField k rest
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noneValue :: String
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noneValue = "none"
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{- Called when there is a problem with a feed.
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-
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- If the feed has been broken for some time,
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- returns False, otherwise only warns. -}
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feedProblem :: URLString -> String -> Annex Bool
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feedProblem url message = ifM (checkFeedBroken url)
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( do
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warning $ message ++ " (having repeated problems with feed: " ++ url ++ ")"
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return False
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, do
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warning $ "warning: " ++ message
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return True
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)
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{- A feed is only broken if problems have occurred repeatedly, for at
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- least 23 hours. -}
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checkFeedBroken :: URLString -> Annex Bool
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checkFeedBroken url = checkFeedBroken' url =<< feedState url
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checkFeedBroken' :: URLString -> FilePath -> Annex Bool
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checkFeedBroken' url f = do
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prev <- maybe Nothing readish <$> liftIO (catchMaybeIO $ readFile f)
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now <- liftIO getCurrentTime
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case prev of
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Nothing -> do
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writeLogFile f $ show now
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return False
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Just prevtime -> do
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let broken = diffUTCTime now prevtime > 60 * 60 * 23
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when broken $
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-- Avoid repeatedly complaining about
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-- broken feed.
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clearFeedProblem url
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return broken
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clearFeedProblem :: URLString -> Annex ()
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clearFeedProblem url = void $ liftIO . tryIO . removeFile =<< feedState url
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feedState :: URLString -> Annex FilePath
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feedState url = fromRepo $ gitAnnexFeedState $ fromUrl url Nothing
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