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|
{- git-annex command
-
- Copyright 2011-2013 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.AddUrl where
import Network.URI
import Common.Annex
import Command
import Backend
import qualified Command.Add
import qualified Annex
import qualified Annex.Queue
import qualified Backend.URL
import qualified Utility.Url as Url
import Annex.Content
import Logs.Web
import qualified Option
import Types.Key
import Types.KeySource
import Config
import Annex.Content.Direct
import Logs.Location
import qualified Logs.Transfer as Transfer
import Utility.Daemon (checkDaemon)
def :: [Command]
def = [notBareRepo $ withOptions [fileOption, pathdepthOption, relaxedOption] $
command "addurl" (paramRepeating paramUrl) seek
SectionCommon "add urls to annex"]
fileOption :: Option
fileOption = Option.field [] "file" paramFile "specify what file the url is added to"
pathdepthOption :: Option
pathdepthOption = Option.field [] "pathdepth" paramNumber "path components to use in filename"
relaxedOption :: Option
relaxedOption = Option.flag [] "relaxed" "skip size check"
seek :: [CommandSeek]
seek = [withField fileOption return $ \f ->
withFlag relaxedOption $ \relaxed ->
withField pathdepthOption (return . maybe Nothing readish) $ \d ->
withStrings $ start relaxed f d]
start :: Bool -> Maybe FilePath -> Maybe Int -> String -> CommandStart
start relaxed optfile pathdepth s = go $ fromMaybe bad $ parseURI s
where
bad = fromMaybe (error $ "bad url " ++ s) $
parseURI $ escapeURIString isUnescapedInURI s
go url = do
pathmax <- liftIO $ fileNameLengthLimit "."
let file = fromMaybe (url2file url pathdepth pathmax) optfile
showStart "addurl" file
next $ perform relaxed s file
perform :: Bool -> String -> FilePath -> CommandPerform
perform relaxed url file = ifAnnexed file addurl geturl
where
geturl = next $ addUrlFile relaxed url file
addurl (key, _backend)
| relaxed = do
setUrlPresent key url
next $ return True
| otherwise = do
headers <- getHttpHeaders
ifM (liftIO $ Url.check url headers $ keySize key)
( do
setUrlPresent key url
next $ return True
, do
warning $ "failed to verify url exists: " ++ url
stop
)
addUrlFile :: Bool -> String -> FilePath -> Annex Bool
addUrlFile relaxed url file = do
liftIO $ createDirectoryIfMissing True (parentDir file)
ifM (Annex.getState Annex.fast <||> pure relaxed)
( nodownload relaxed url file
, do
showAction $ "downloading " ++ url ++ " "
download url file
)
download :: String -> FilePath -> Annex Bool
download url file = do
dummykey <- genkey
tmp <- fromRepo $ gitAnnexTmpLocation dummykey
showOutput
ifM (runtransfer dummykey tmp)
( do
backend <- chooseBackend file
let source = KeySource
{ keyFilename = file
, contentLocation = tmp
, inodeCache = Nothing
}
k <- genKey source backend
case k of
Nothing -> return False
Just (key, _) -> cleanup url file key (Just tmp)
, return False
)
where
{- Generate a dummy key to use for this download, before we can
- examine the file and find its real key. This allows resuming
- downloads, as the dummy key for a given url is stable.
-
- If the assistant is running, actually hits the url here,
- to get the size, so it can display a pretty progress bar.
-}
genkey = do
pidfile <- fromRepo gitAnnexPidFile
size <- ifM (liftIO $ isJust <$> checkDaemon pidfile)
( do
headers <- getHttpHeaders
liftIO $ snd <$> Url.exists url headers
, return Nothing
)
Backend.URL.fromUrl url size
runtransfer dummykey tmp =
Transfer.download webUUID dummykey (Just file) Transfer.forwardRetry $ const $ do
liftIO $ createDirectoryIfMissing True (parentDir tmp)
downloadUrl [url] tmp
cleanup :: String -> FilePath -> Key -> Maybe FilePath -> Annex Bool
cleanup url file key mtmp = do
when (isJust mtmp) $
logStatus key InfoPresent
setUrlPresent key url
Command.Add.addLink file key False
whenM isDirect $ do
void $ addAssociatedFile key file
{- For moveAnnex to work in direct mode, the symlink
- must already exist, so flush the queue. -}
Annex.Queue.flush
maybe noop (moveAnnex key) mtmp
return True
nodownload :: Bool -> String -> FilePath -> Annex Bool
nodownload relaxed url file = do
headers <- getHttpHeaders
(exists, size) <- if relaxed
then pure (True, Nothing)
else liftIO $ Url.exists url headers
if exists
then do
key <- Backend.URL.fromUrl url size
cleanup url file key Nothing
else do
warning $ "unable to access url: " ++ url
return False
url2file :: URI -> Maybe Int -> Int -> FilePath
url2file url pathdepth pathmax = case pathdepth of
Nothing -> truncateFilePath pathmax $ escape fullurl
Just depth
| depth >= length urlbits -> frombits id
| depth > 0 -> frombits $ drop depth
| depth < 0 -> frombits $ reverse . take (negate depth) . reverse
| otherwise -> error "bad --pathdepth"
where
fullurl = uriRegName auth ++ uriPath url ++ uriQuery url
frombits a = intercalate "/" $ a urlbits
urlbits = map (truncateFilePath pathmax . escape) $ filter (not . null) $ split "/" fullurl
auth = fromMaybe (error $ "bad url " ++ show url) $ uriAuthority url
escape = replace "/" "_" . replace "?" "_"
|
