890330f0fe
Convert Utility.Url to return Either String so the error message can be displated in the annex monad and so captured. (When curl is used, its errors are still not caught.)
405 lines
13 KiB
Haskell
405 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 Command.AddUrl (addWorkTree)
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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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<$> cmdParams desc
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<*> optional (strOption
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( long "template" <> metavar paramFormat
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<> help "template for filenames"
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))
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<*> parseDownloadOptions False
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seek :: ImportFeedOptions -> CommandSeek
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seek o = do
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cache <- getCache (templateOption o)
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forM_ (feedUrls o) (getFeed o cache)
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getFeed :: ImportFeedOptions -> Cache -> URLString -> CommandSeek
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getFeed opts cache url = do
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showStart "importfeed" url
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downloadFeed url >>= \case
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Nothing -> showEndResult =<< feedProblem url
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"downloading the feed failed"
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Just feedcontent -> case parseFeedString feedcontent of
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Nothing -> debugfeedcontent feedcontent "parsing the feed failed"
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Just f -> case findDownloads url f of
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[] -> debugfeedcontent feedcontent "bad feed content; no enclosures to download"
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l -> do
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showEndOk
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ifM (and <$> mapM (performDownload 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 :: ImportFeedOptions -> Cache -> ToDownload -> Annex Bool
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performDownload 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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urlinfo <- if relaxedOption (downloadOptions opts)
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then pure Url.assumeUrlExists
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else Url.withUrlOptions $
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Url.getUrlInfo url
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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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maybeToList <$> addUrlFile dlopts url urlinfo f
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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 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 r (downloadOptions opts) url' (f </> fromSafeFilePath 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" 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 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 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 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 webUUID mediaurl f mediakey Nothing
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return [mediakey]
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, performDownload 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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