git-annex/Command/ImportFeed.hs

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{- git-annex command
-
- Copyright 2013-2024 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE CPP #-}
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module Command.ImportFeed where
import Text.Feed.Import
import Text.Feed.Query
import Text.Feed.Types
import qualified Data.Set as S
import qualified Data.Map as M
import Data.Time.Clock
import Data.Time.Clock.POSIX
import Data.Time.Format
import Data.Time.Calendar
import Data.Time.LocalTime
import Control.Concurrent.STM
import qualified Data.Text as T
import qualified Data.Text.Encoding as TE
import qualified System.FilePath.ByteString as P
import qualified Data.ByteString as B
import Command
import qualified Annex
import qualified Annex.Url as Url
import qualified Remote
import qualified Types.Remote as Remote
import Types.UrlContents
import Logs.Web
import Logs.File
import qualified Utility.Format
import Utility.Tmp
import Utility.Metered
import Command.AddUrl (addUrlFile, downloadRemoteFile, parseDownloadOptions, DownloadOptions(..), checkClaimingUrl, checkCanAdd, addWorkTree, checkRaw, useYoutubeDl)
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import Annex.UUID
import Backend.URL (fromUrl)
import Annex.Content
import Annex.WorkTree
import Annex.YoutubeDl
import Types.MetaData
import Logs.MetaData
import Annex.MetaData
import Annex.FileMatcher
import Annex.UntrustedFilePath
import qualified Utility.RawFilePath as R
import qualified Database.ImportFeed as Db
cmd :: Command
cmd = notBareRepo $ withAnnexOptions os $
command "importfeed" SectionCommon "import files from podcast feeds"
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(paramRepeating paramUrl) (seek <$$> optParser)
where
os = [jobsOption, jsonOptions, jsonProgressOption, backendOption]
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data ImportFeedOptions = ImportFeedOptions
{ feedUrls :: CmdParams
, templateOption :: Maybe String
, scrapeOption :: Bool
, downloadOptions :: DownloadOptions
}
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optParser :: CmdParamsDesc -> Parser ImportFeedOptions
optParser desc = ImportFeedOptions
<$> cmdParams desc
<*> optional (strOption
( long "template" <> metavar paramFormat
<> help "template for filenames"
))
<*> switch
( long "scrape"
<> help "scrape website for content to import"
)
<*> parseDownloadOptions False
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seek :: ImportFeedOptions -> CommandSeek
seek o = startConcurrency commandStages $ do
addunlockedmatcher <- addUnlockedMatcher
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cache <- getCache (templateOption o)
dlst <- liftIO $ newTMVarIO M.empty
checkst <- liftIO $ newTVarIO M.empty
forM_ (feedUrls o) $ \url -> do
liftIO $ atomically $ do
m <- takeTMVar dlst
putTMVar dlst (M.insert url Nothing m)
commandAction $ getFeed o url dlst
startpendingdownloads addunlockedmatcher cache dlst checkst False
startpendingdownloads addunlockedmatcher cache dlst checkst True
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clearfeedproblems checkst
where
getpendingdownloads dlst blocking
| blocking = do
m <- takeTMVar dlst
if M.null m
then do
putTMVar dlst m
return m
else
let (pending, rest) = M.partition ispending m
in if M.null pending || not (M.null rest)
then retry
else do
putTMVar dlst rest
return pending
| otherwise = do
m <- takeTMVar dlst
let (pending, rest) = M.partition ispending m
putTMVar dlst rest
return pending
where
ispending Nothing = False
ispending (Just _) = True
startpendingdownloads addunlockedmatcher cache dlst checkst blocking = do
m <- liftIO $ atomically $ getpendingdownloads dlst blocking
forM_ (M.toList m) $ \(url, v) -> case v of
Nothing -> noop
Just Nothing -> noop
Just (Just is) ->
forM_ is $ \i -> do
cv <- liftIO newEmptyTMVarIO
liftIO $ atomically $ modifyTVar checkst $
M.insertWith (++) url [cv]
commandAction $
startDownload addunlockedmatcher o cache cv i
clearfeedproblems checkst = do
m <- liftIO $ atomically $ readTVar checkst
forM_ (M.toList m) $ \(url, cvl) ->
whenM (and <$> mapM (liftIO . atomically . takeTMVar) cvl) $
clearFeedProblem url
getFeed
:: ImportFeedOptions
-> URLString
-> TMVar (M.Map URLString (Maybe (Maybe [ToDownload])))
-> CommandStart
getFeed o url st =
starting "importfeed" (ActionItemOther (Just (UnquotedString url))) (SeekInput [url]) $
go `onException` recordfail
where
record v = liftIO $ atomically $ do
m <- takeTMVar st
putTMVar st (M.insert url v m)
recordfail = record (Just Nothing)
go
| scrapeOption o = scrape
| otherwise = get
get = withTmpFile "feed" $ \tmpf h -> do
liftIO $ hClose h
ifM (downloadFeed url tmpf)
( parse tmpf
, do
recordfail
next $ feedProblem url
"downloading the feed failed"
)
-- Use parseFeedFromFile rather than reading the file
-- ourselves because it goes out of its way to handle encodings.
parse tmpf = liftIO (parseFeedFromFile' tmpf) >>= \case
Nothing -> debugfeedcontent tmpf "parsing the feed failed"
Just f -> do
case decodeBS $ fromFeedText $ getFeedTitle f of
"" -> noop
t -> showNote (UnquotedString ('"' : t ++ "\""))
case findDownloads url f of
[] -> debugfeedcontent tmpf "bad feed content; no enclosures to download"
l -> do
record (Just (Just l))
next $ return True
debugfeedcontent tmpf msg = do
feedcontent <- liftIO $ readFile tmpf
fastDebug "Command.ImportFeed" $ unlines
[ "start of feed content"
, feedcontent
, "end of feed content"
]
recordfail
next $ feedProblem url
(msg ++ " (use --debug --debugfilter=ImportFeed to see the feed content that was downloaded)")
scrape = youtubePlaylist url >>= \case
Left err -> do
recordfail
next $ feedProblem url err
Right playlist -> do
record (Just (Just (playlistDownloads url playlist)))
next $ return True
parseFeedFromFile' :: FilePath -> IO (Maybe Feed)
#if MIN_VERSION_feed(1,1,0)
parseFeedFromFile' = parseFeedFromFile
#else
parseFeedFromFile' f = catchMaybeIO (parseFeedFromFile f)
#endif
data ToDownload = ToDownload
{ feedurl :: URLString
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, location :: DownloadLocation
, itemid :: Maybe B.ByteString
-- Either the parsed or unparsed date.
, itempubdate :: Maybe (Either String UTCTime)
-- Fields that are used as metadata and to generate the filename.
, itemfields :: [(String, String)]
-- True when youtube-dl found this by scraping, so certainly
-- supports downloading it.
, youtubedlscraped :: Bool
}
data DownloadLocation = Enclosure URLString | MediaLink URLString
type ItemId = String
data Cache = Cache
{ dbhandle :: Maybe Db.ImportFeedDbHandle
, template :: Utility.Format.Format
}
getCache :: Maybe String -> Annex Cache
getCache opttemplate = ifM (Annex.getRead Annex.force)
( ret Nothing
, do
j <- jsonOutputEnabled
unless j $
showStartMessage (StartMessage "importfeed" (ActionItemOther (Just "gathering known urls")) (SeekInput []))
h <- Db.openDb
unless j
showEndOk
ret (Just h)
)
where
tmpl = Utility.Format.gen $ fromMaybe defaultTemplate opttemplate
ret h = return $ Cache h tmpl
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findDownloads :: URLString -> Feed -> [ToDownload]
findDownloads u f = catMaybes $ map mk (feedItems f)
where
mk i = case getItemEnclosure i of
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Just (enclosureurl, _, _) ->
Just $ mk' i
(Enclosure $ decodeBS $ fromFeedText enclosureurl)
Nothing -> case getItemLink i of
Just l -> Just $ mk' i
(MediaLink $ decodeBS $ fromFeedText l)
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Nothing -> Nothing
mk' i l = ToDownload
{ feedurl = u
, location = l
, itemid = case getItemId i of
Just (_, iid) -> Just (fromFeedText iid)
_ -> Nothing
, itempubdate = case getItemPublishDate i :: Maybe (Maybe UTCTime) of
Just (Just d) -> Just (Right d)
_ -> Left . decodeBS . fromFeedText
<$> getItemPublishDateString i
, itemfields = extractFeedItemFields f i u
, youtubedlscraped = False
}
{- Feeds change, so a feed download cannot be resumed. -}
downloadFeed :: URLString -> FilePath -> Annex Bool
downloadFeed url f
| Url.parseURIRelaxed url == Nothing = giveup "invalid feed url"
| otherwise = Url.withUrlOptions $
Url.download nullMeterUpdate Nothing url f
startDownload :: AddUnlockedMatcher -> ImportFeedOptions -> Cache -> TMVar Bool -> ToDownload -> CommandStart
startDownload addunlockedmatcher opts cache cv todownload = case location todownload of
Enclosure url -> startdownloadenclosure url
MediaLink linkurl -> do
let mediaurl = setDownloader linkurl YoutubeDownloader
let mediakey = Backend.URL.fromUrl mediaurl Nothing
-- 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
-- to avoid adding it a second time.
let quviurl = setDownloader linkurl QuviDownloader
checkknown mediaurl $ checkknown quviurl $
ifM (Annex.getRead Annex.fast <||> pure (relaxedOption (downloadOptions opts)))
( addmediafast linkurl mediaurl mediakey
, downloadmedia linkurl mediaurl mediakey
)
where
{- Avoids downloading any items that are already known to be
- associated with a file in the annex. -}
checkknown url a = case dbhandle cache of
Just db -> ifM (liftIO $ Db.isKnownUrl db url)
( nothingtodo
, case itemid todownload of
Just iid ->
ifM (liftIO $ Db.isKnownItemId db iid)
( nothingtodo
, a
)
Nothing -> a
)
Nothing -> a
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nothingtodo = recordsuccess >> stop
recordsuccess = liftIO $ atomically $ putTMVar cv True
startdownloadenclosure :: URLString -> CommandStart
startdownloadenclosure url = checkknown url $ startUrlDownload cv todownload url $
downloadEnclosure addunlockedmatcher opts cache cv todownload url
downloadmedia linkurl mediaurl mediakey =
ifM (useYoutubeDl (downloadOptions opts) <&&> youtubeDlSupported linkurl)
( startUrlDownload cv todownload linkurl $
withTmpWorkDir mediakey $ \workdir -> do
dl <- youtubeDl linkurl (fromRawFilePath workdir) nullMeterUpdate
case dl of
Right (Just mediafile) -> do
let ext = case takeExtension mediafile of
[] -> ".m"
s -> s
runDownload todownload linkurl ext cache cv $ \f ->
checkCanAdd (downloadOptions opts) f $ \canadd -> do
addWorkTree canadd addunlockedmatcher webUUID mediaurl f mediakey (Just (toRawFilePath mediafile))
return (Just [mediakey])
-- youtube-dl didn't support it, so
-- download it as if the link were
-- an enclosure.
Right Nothing -> contdownloadlink
Left msg -> do
warning $ UnquotedString $ linkurl ++ ": " ++ msg
liftIO $ atomically $ putTMVar cv False
next $ return False
, startdownloadlink
)
where
startdownloadlink = checkRaw (Just linkurl) (downloadOptions opts) nothingtodo $
startdownloadenclosure linkurl
contdownloadlink = downloadEnclosure addunlockedmatcher opts cache cv todownload linkurl
addmediafast linkurl mediaurl mediakey =
ifM (useYoutubeDl (downloadOptions opts)
<&&> (pure (youtubedlscraped todownload) <||> youtubeDlSupported linkurl))
( startUrlDownload cv todownload linkurl $ do
runDownload todownload linkurl ".m" cache cv $ \f ->
checkCanAdd (downloadOptions opts) f $ \canadd -> do
addWorkTree canadd addunlockedmatcher webUUID mediaurl f mediakey Nothing
return (Just [mediakey])
, startdownloadenclosure linkurl
)
downloadEnclosure :: AddUnlockedMatcher -> ImportFeedOptions -> Cache -> TMVar Bool -> ToDownload -> URLString -> CommandPerform
downloadEnclosure addunlockedmatcher opts cache cv todownload url =
runDownload todownload url (takeWhile (/= '?') $ takeExtension url) cache cv $ \f -> do
let f' = fromRawFilePath f
r <- checkClaimingUrl (downloadOptions opts) url
if Remote.uuid r == webUUID || rawOption (downloadOptions opts)
then checkRaw (Just url) (downloadOptions opts) (pure Nothing) $ do
let dlopts = (downloadOptions opts)
-- force using the filename
-- chosen here
{ fileOption = Just f'
-- don't use youtube-dl
, rawOption = True
}
let go urlinfo = Just . maybeToList <$> addUrlFile addunlockedmatcher dlopts url urlinfo f
if relaxedOption (downloadOptions opts)
then go Url.assumeUrlExists
else Url.withUrlOptions (Url.getUrlInfo url) >>= \case
Right urlinfo -> go urlinfo
Left err -> do
warning (UnquotedString err)
return (Just [])
else do
res <- tryNonAsync $ maybe
(giveup $ "unable to checkUrl of " ++ Remote.name r)
(flip id url)
(Remote.checkUrl r)
case res of
Left _ -> return (Just [])
Right (UrlContents sz _) ->
Just . maybeToList <$>
downloadRemoteFile addunlockedmatcher r (downloadOptions opts) url f sz
Right (UrlMulti l) -> do
kl <- forM l $ \(url', sz, subf) ->
let dest = f P.</> toRawFilePath (sanitizeFilePath subf)
in downloadRemoteFile addunlockedmatcher r (downloadOptions opts) url' dest sz
return $ Just $ if all isJust kl
then catMaybes kl
else []
runDownload
:: ToDownload
-> URLString
-> String
-> Cache
-> TMVar Bool
-> (RawFilePath -> Annex (Maybe [Key]))
-> CommandPerform
runDownload todownload url extension cache cv getter = do
dest <- makeunique (1 :: Integer) $
feedFile (template cache) todownload extension
case dest of
Nothing -> do
recordsuccess
next $ return True
Just f -> getter (toRawFilePath f) >>= \case
Just ks
-- Download problem.
| null ks -> do
broken <- checkFeedBroken (feedurl todownload)
when broken $
void $ feedProblem url "download failed"
liftIO $ atomically $ putTMVar cv broken
next $ return False
| otherwise -> do
forM_ ks $ \key ->
ifM (annexGenMetaData <$> Annex.getGitConfig)
( addMetaData key $ extractMetaData todownload
, addMetaData key $ minimalMetaData todownload
)
recordsuccess
next $ return True
-- Was not able to add anything, but not
-- because of a download problem.
Nothing -> do
recordsuccess
next $ return False
where
recordsuccess = liftIO $ atomically $ putTMVar cv True
forced = Annex.getRead Annex.force
{- Find a unique filename to save the url to.
- If the file exists, prefixes it with a number.
- When forced, the file may already exist and have the same
- url, in which case Nothing is returned as it does not need
- to be re-downloaded. -}
makeunique n file = ifM alreadyexists
( ifM forced
( lookupKey (toRawFilePath f) >>= \case
Just k -> checksameurl k
Nothing -> tryanother
, tryanother
)
, return $ Just f
)
where
f = if n < 2
then file
else
let (d, base) = splitFileName file
in d </> show n ++ "_" ++ base
tryanother = makeunique (n + 1) file
alreadyexists = liftIO $ isJust <$> catchMaybeIO (R.getSymbolicLinkStatus (toRawFilePath f))
checksameurl k = ifM (elem url . map fst . map getDownloader <$> getUrls k)
( return Nothing
, tryanother
)
startUrlDownload :: TMVar Bool -> ToDownload -> URLString -> CommandPerform -> CommandStart
startUrlDownload cv todownload url a = do
starting "addurl"
(ActionItemOther (Just (UnquotedString url)))
(SeekInput [feedurl todownload])
(go `onException` recordfailure)
where
recordfailure = do
void $ feedProblem url "download failed"
liftIO $ atomically $ tryPutTMVar cv False
go = do
maybeAddJSONField "url" url
a
defaultTemplate :: String
defaultTemplate = "${feedtitle}/${itemtitle}${extension}"
{- Generates a filename to use for a feed item by filling out the template.
- The filename may not be unique. -}
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feedFile :: Utility.Format.Format -> ToDownload -> String -> FilePath
feedFile tmpl i extension = sanitizeLeadingFilePathCharacter $
Utility.Format.format tmpl $
M.map sanitizeFilePathComponent $ M.fromList $ itemfields i ++
[ ("extension", extension)
, extractField "itempubdate" [itempubdatestring]
, extractField "itempubyear" [itempubyear]
, extractField "itempubmonth" [itempubmonth]
, extractField "itempubday" [itempubday]
, extractField "itempubhour" [itempubhour]
, extractField "itempubminute" [itempubminute]
, extractField "itempubsecond" [itempubsecond]
]
where
pubdate = maybe Nothing eitherToMaybe (itempubdate i)
itempubdatestring = case itempubdate i of
Just (Right pd) -> Just $ formatTime defaultTimeLocale "%F" pd
-- if date cannot be parsed, use the raw string
Just (Left s) -> Just $ replace "/" "-" s
Nothing -> Nothing
(itempubyear, itempubmonth, itempubday) = case pubdate of
Nothing -> (Nothing, Nothing, Nothing)
Just pd ->
let (y, m, d) = toGregorian (utctDay pd)
in (Just (show y), Just (show m), Just (show d))
(itempubhour, itempubminute, itempubsecond) = case pubdate of
Nothing -> (Nothing, Nothing, Nothing)
Just pd ->
let tod = timeToTimeOfDay (utctDayTime pd)
in ( Just (show (todHour tod))
, Just (show (todMin tod))
-- avoid fractional seconds
, Just (takeWhile (/= '.') (show (todSec tod)))
)
extractMetaData :: ToDownload -> MetaData
extractMetaData i = case itempubdate i of
Just (Right d) -> unionMetaData meta (dateMetaData d meta)
_ -> meta
where
tometa (k, v) = (mkMetaFieldUnchecked (T.pack k), S.singleton (toMetaValue (encodeBS v)))
meta = MetaData $ M.fromList $ map tometa $ itemfields i
minimalMetaData :: ToDownload -> MetaData
minimalMetaData i = case itemid i of
Nothing -> emptyMetaData
Just iid -> MetaData $ M.singleton itemIdField
(S.singleton $ toMetaValue iid)
noneValue :: String
noneValue = "none"
extractField :: String -> [Maybe String] -> (String, String)
extractField k [] = (k, noneValue)
extractField k (Just v:_)
| not (null v) = (k, v)
extractField k (_:rest) = extractField k rest
extractFeedItemFields :: Feed -> Item -> URLString -> [(String, String)]
extractFeedItemFields f i u = map (uncurry extractField)
[ ("feedurl", [Just u])
, ("feedtitle", [feedtitle])
, ("itemtitle", [itemtitle])
, ("feedauthor", [feedauthor])
, ("itemauthor", [itemauthor])
, ("itemsummary", [decodeBS . fromFeedText <$> getItemSummary i])
, ("itemdescription", [decodeBS . fromFeedText <$> getItemDescription i])
, ("itemrights", [decodeBS . fromFeedText <$> getItemRights i])
, ("itemid", [decodeBS . fromFeedText . snd <$> getItemId i])
, ("title", [itemtitle, feedtitle])
, ("author", [itemauthor, feedauthor])
]
where
feedtitle = Just $ decodeBS $ fromFeedText $ getFeedTitle f
itemtitle = decodeBS . fromFeedText <$> getItemTitle i
feedauthor = decodeBS . fromFeedText <$> getFeedAuthor f
itemauthor = decodeBS . fromFeedText <$> getItemAuthor i
playlistFields :: URLString -> YoutubePlaylistItem -> [(String, String)]
playlistFields u i = map (uncurry extractField)
[ ("feedurl", [Just u])
, ("feedtitle", [youtube_playlist_title i])
, ("itemtitle", [youtube_title i])
, ("feedauthor", [youtube_playlist_uploader i])
, ("itemauthor", [youtube_playlist_uploader i])
-- itemsummary omitted, no equivilant in yt-dlp data
, ("itemdescription", [youtube_description i])
, ("itemrights", [youtube_license i])
, ("itemid", [youtube_url i])
, ("title", [youtube_title i, youtube_playlist_title i])
, ("author", [youtube_playlist_uploader i])
]
playlistDownloads :: URLString -> [YoutubePlaylistItem] -> [ToDownload]
playlistDownloads url = mapMaybe go
where
go i = do
iurl <- youtube_url i
return $ ToDownload
{ feedurl = url
, location = MediaLink iurl
, itemid = Just (encodeBS iurl)
, itempubdate =
Right . posixSecondsToUTCTime . fromIntegral
<$> youtube_timestamp i
, itemfields = playlistFields url i
, youtubedlscraped = True
}
{- Called when there is a problem with a feed.
-
- If the feed has been broken for some time,
- returns False, otherwise only warns. -}
feedProblem :: URLString -> String -> Annex Bool
feedProblem url message = ifM (checkFeedBroken url)
( do
warning $ UnquotedString $ message ++ " (having repeated problems with feed: " ++ url ++ ")"
return False
, do
warning $ UnquotedString $ "warning: " ++ message ++ " (feed: " ++ url ++ ")"
return True
)
{- A feed is only broken if problems have occurred repeatedly, for at
- least 23 hours. -}
checkFeedBroken :: URLString -> Annex Bool
checkFeedBroken url = checkFeedBroken' url =<< feedState url
checkFeedBroken' :: URLString -> RawFilePath -> Annex Bool
checkFeedBroken' url f = do
prev <- maybe Nothing readish
<$> liftIO (catchMaybeIO $ readFile (fromRawFilePath f))
now <- liftIO getCurrentTime
case prev of
Nothing -> do
writeLogFile f $ show now
return False
Just prevtime -> do
let broken = diffUTCTime now prevtime > 60 * 60 * 23
when broken $
-- Avoid repeatedly complaining about
-- broken feed.
clearFeedProblem url
return broken
clearFeedProblem :: URLString -> Annex ()
clearFeedProblem url =
void $ liftIO . tryIO . removeFile . fromRawFilePath
=<< feedState url
feedState :: URLString -> Annex RawFilePath
feedState url = fromRepo $ gitAnnexFeedState $ fromUrl url Nothing
{- The feed library parses the feed to Text, and does not use the
- filesystem encoding to do it, so when the locale is not unicode
- capable, a Text value can still include unicode characters.
-
- So, it's not safe to use T.unpack to convert that to a String,
- because later use of that String by eg encodeBS will crash
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- with an encoding error. Use this instead.
-
- This should not be used on a Text that is read using the
- filesystem encoding because it does not reverse that encoding.
-}
fromFeedText :: T.Text -> B.ByteString
fromFeedText = TE.encodeUtf8