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Merge branch 's3-aws'

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Joey Hess 2014-12-03 14:02:29 -04:00
commit 911ba8d972
12 changed files with 493 additions and 225 deletions
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38
Remote/Helper/AWS.hs
View file

@ -1,6 +1,6 @@
{- Amazon Web Services common infrastructure.
-
- Copyright 2011,2012 Joey Hess <joey@kitenet.net>
- Copyright 2011-2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
@ -12,8 +12,14 @@ module Remote.Helper.AWS where
import Common.Annex
import Creds
import qualified Aws
import qualified Aws.S3 as S3
import qualified Data.Map as M
import qualified Data.ByteString as B
import qualified Data.Text as T
import Data.Text.Encoding (encodeUtf8)
import Data.Text (Text)
import Data.IORef
creds :: UUID -> CredPairStorage
creds u = CredPairStorage
@ -22,6 +28,13 @@ creds u = CredPairStorage
, credPairRemoteKey = Just "s3creds"
}
genCredentials :: CredPair -> IO Aws.Credentials
genCredentials (keyid, secret) = Aws.Credentials
<$> pure (encodeUtf8 (T.pack keyid))
<*> pure (encodeUtf8 (T.pack secret))
<*> newIORef []
<*> pure Nothing
data Service = S3 | Glacier
deriving (Eq)
@ -33,9 +46,10 @@ regionMap = M.fromList . regionInfo
defaultRegion :: Service -> Region
defaultRegion = snd . Prelude.head . regionInfo
{- S3 and Glacier use different names for some regions. Ie, "us-east-1"
- cannot be used with S3, while "US" cannot be used with Glacier. Dunno why.
- Also, Glacier is not yet available in all regions. -}
data ServiceRegion = BothRegion Region | S3Region Region | GlacierRegion Region
{- The "US" and "EU" names are used as location constraints when creating a
- S3 bucket. -}
regionInfo :: Service -> [(Text, Region)]
regionInfo service = map (\(t, r) -> (t, fromServiceRegion r)) $
filter (matchingService . snd) $
@ -45,9 +59,7 @@ regionInfo service = map (\(t, r) -> (t, fromServiceRegion r)) $
[ ("US East (N. Virginia)", [S3Region "US", GlacierRegion "us-east-1"])
, ("US West (Oregon)", [BothRegion "us-west-2"])
, ("US West (N. California)", [BothRegion "us-west-1"])
-- Requires AWS4-HMAC-SHA256 which S3 library does not
-- currently support.
-- , ("EU (Frankfurt)", [BothRegion "eu-central-1"])
, ("EU (Frankfurt)", [BothRegion "eu-central-1"])
, ("EU (Ireland)", [S3Region "EU", GlacierRegion "eu-west-1"])
, ("Asia Pacific (Singapore)", [S3Region "ap-southeast-1"])
, ("Asia Pacific (Tokyo)", [BothRegion "ap-northeast-1"])
@ -63,4 +75,14 @@ regionInfo service = map (\(t, r) -> (t, fromServiceRegion r)) $
matchingService (S3Region _) = service == S3
matchingService (GlacierRegion _) = service == Glacier
data ServiceRegion = BothRegion Region | S3Region Region | GlacierRegion Region
s3HostName :: Region -> B.ByteString
s3HostName "US" = "s3.amazonaws.com"
s3HostName "EU" = "s3-eu-west-1.amazonaws.com"
s3HostName r = encodeUtf8 $ T.concat ["s3-", r, ".amazonaws.com"]
s3DefaultHost :: String
s3DefaultHost = "s3.amazonaws.com"
mkLocationConstraint :: Region -> S3.LocationConstraint
mkLocationConstraint "US" = S3.locationUsClassic
mkLocationConstraint r = r

52
Remote/Helper/Http.hs
View file

@ -5,13 +5,15 @@
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE BangPatterns #-}
module Remote.Helper.Http where
import Common.Annex
import Types.StoreRetrieve
import Utility.Metered
import Remote.Helper.Special
import Network.HTTP.Client (RequestBody(..), Response, responseStatus, responseBody, BodyReader)
import Network.HTTP.Client (RequestBody(..), Response, responseStatus, responseBody, BodyReader, NeedsPopper)
import Network.HTTP.Types
import qualified Data.ByteString.Lazy as L
@ -24,17 +26,45 @@ import Control.Concurrent
-- Implemented as a fileStorer, so that the content can be streamed
-- from the file in constant space.
httpStorer :: (Key -> RequestBody -> Annex Bool) -> Storer
httpStorer a = fileStorer $ \k f m -> do
size <- liftIO $ (fromIntegral . fileSize <$> getFileStatus f :: IO Integer)
let streamer sink = withMeteredFile f m $ \b -> do
mvar <- newMVar $ L.toChunks b
let getnextchunk = modifyMVar mvar $ pure . pop
sink getnextchunk
let body = RequestBodyStream (fromInteger size) streamer
a k body
httpStorer a = fileStorer $ \k f m -> a k =<< liftIO (httpBodyStorer f m)
-- Reads the file and generates a streaming request body, that will update
-- the meter as it's sent.
httpBodyStorer :: FilePath -> MeterUpdate -> IO RequestBody
httpBodyStorer src m = do
size <- fromIntegral . fileSize <$> getFileStatus src :: IO Integer
let streamer sink = withMeteredFile src m $ \b -> byteStringPopper b sink
return $ RequestBodyStream (fromInteger size) streamer
byteStringPopper :: L.ByteString -> NeedsPopper () -> IO ()
byteStringPopper b sink = do
mvar <- newMVar $ L.toChunks b
let getnextchunk = modifyMVar mvar $ \v ->
case v of
[] -> return ([], S.empty)
(c:cs) -> return (cs, c)
sink getnextchunk
{- Makes a Popper that streams a given number of chunks of a given
- size from the handle, updating the meter as the chunks are read. -}
handlePopper :: Integer -> Int -> MeterUpdate -> Handle -> NeedsPopper () -> IO ()
handlePopper numchunks chunksize meterupdate h sink = do
mvar <- newMVar zeroBytesProcessed
let getnextchunk = do
sent <- takeMVar mvar
if sent >= target
then do
putMVar mvar sent
return S.empty
else do
b <- S.hGet h chunksize
let !sent' = addBytesProcessed sent chunksize
putMVar mvar sent'
meterupdate sent'
return b
sink getnextchunk
where
pop [] = ([], S.empty)
pop (c:cs) = (cs, c)
target = toBytesProcessed (numchunks * fromIntegral chunksize)
-- Reads the http body and stores it to the specified file, updating the
-- meter as it goes.

554
Remote/S3.hs
View file

@ -1,22 +1,31 @@
{- S3 remotes
-
- Copyright 2011-2013 Joey Hess <joey@kitenet.net>
- Copyright 2011-2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE CPP #-}
module Remote.S3 (remote, iaHost, configIA, iaItemUrl) where
import Network.AWS.AWSConnection
import Network.AWS.S3Object hiding (getStorageClass)
import Network.AWS.S3Bucket hiding (size)
import Network.AWS.AWSResult
import qualified Aws as AWS
import qualified Aws.Core as AWS
import qualified Aws.S3 as S3
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Data.ByteString.Lazy as L
import qualified Data.ByteString as S
import qualified Data.Map as M
import Data.Char
import Network.Socket (HostName)
import Network.HTTP.Conduit (Manager, newManager, closeManager)
import Network.HTTP.Client (defaultManagerSettings, managerResponseTimeout, responseStatus, responseBody, RequestBody(..))
import Network.HTTP.Types
import Control.Monad.Trans.Resource
import Control.Monad.Catch
import Data.Conduit
import Common.Annex
import Types.Remote
@ -25,13 +34,15 @@ import qualified Git
import Config
import Config.Cost
import Remote.Helper.Special
import Remote.Helper.Http
import qualified Remote.Helper.AWS as AWS
import Creds
import Utility.Metered
import Annex.UUID
import Logs.Web
import Utility.Metered
import Utility.DataUnits
type Bucket = String
type BucketName = String
remote :: RemoteType
remote = RemoteType {
@ -42,13 +53,16 @@ remote = RemoteType {
}
gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
gen r u c gc = new <$> remoteCost gc expensiveRemoteCost
gen r u c gc = do
cst <- remoteCost gc expensiveRemoteCost
info <- extractS3Info c
return $ new cst info
where
new cst = Just $ specialRemote c
(prepareStore this)
(prepareRetrieve this)
(simplyPrepare $ remove this c)
(simplyPrepare $ checkKey this)
new cst info = Just $ specialRemote c
(prepareS3 this info $ store this)
(prepareS3 this info retrieve)
(prepareS3 this info remove)
(prepareS3 this info $ checkKey this)
this
where
this = Remote {
@ -73,10 +87,11 @@ gen r u c gc = new <$> remoteCost gc expensiveRemoteCost
remotetype = remote,
mkUnavailable = gen r u (M.insert "host" "!dne!" c) gc,
getInfo = includeCredsInfo c (AWS.creds u) $ catMaybes
[ Just ("bucket", fromMaybe "unknown" (getBucket c))
[ Just ("bucket", fromMaybe "unknown" (getBucketName c))
, if configIA c
then Just ("internet archive item", iaItemUrl $ fromMaybe "unknown" $ getBucket c)
then Just ("internet archive item", iaItemUrl $ fromMaybe "unknown" $ getBucketName c)
else Nothing
, Just ("partsize", maybe "unlimited" (roughSize storageUnits False) (getPartSize c))
]
}
@ -92,8 +107,8 @@ s3Setup' u mcreds c = if configIA c then archiveorg else defaulthost
defaults = M.fromList
[ ("datacenter", T.unpack $ AWS.defaultRegion AWS.S3)
, ("storageclass", "STANDARD")
, ("host", defaultAmazonS3Host)
, ("port", show defaultAmazonS3Port)
, ("host", AWS.s3DefaultHost)
, ("port", "80")
, ("bucket", defbucket)
]
@ -113,52 +128,114 @@ s3Setup' u mcreds c = if configIA c then archiveorg else defaulthost
c' <- setRemoteCredPair noEncryptionUsed c (AWS.creds u) mcreds
-- Ensure user enters a valid bucket name, since
-- this determines the name of the archive.org item.
let bucket = replace " " "-" $ map toLower $
let validbucket = replace " " "-" $ map toLower $
fromMaybe (error "specify bucket=") $
getBucket c'
getBucketName c'
let archiveconfig =
-- hS3 does not pass through x-archive-* headers
-- IA acdepts x-amz-* as an alias for x-archive-*
M.mapKeys (replace "x-archive-" "x-amz-") $
-- encryption does not make sense here
M.insert "encryption" "none" $
M.insert "bucket" bucket $
M.insert "bucket" validbucket $
M.union c' $
-- special constraints on key names
M.insert "mungekeys" "ia" $
-- bucket created only when files are uploaded
M.insert "x-amz-auto-make-bucket" "1" defaults
writeUUIDFile archiveconfig u
M.insert "mungekeys" "ia" defaults
info <- extractS3Info archiveconfig
withS3Handle archiveconfig u info $
writeUUIDFile archiveconfig u
use archiveconfig
prepareStore :: Remote -> Preparer Storer
prepareStore r = resourcePrepare (const $ s3Action r False) $ \(conn, bucket) ->
fileStorer $ \k src p -> do
ok <- s3Bool =<< liftIO (store (conn, bucket) r k p src)
-- Sets up a http connection manager for S3 encdpoint, which allows
-- http connections to be reused across calls to the helper.
prepareS3 :: Remote -> S3Info -> (S3Handle -> helper) -> Preparer helper
prepareS3 r info = resourcePrepare $ const $
withS3Handle (config r) (uuid r) info
-- Store public URL to item in Internet Archive.
when (ok && configIA (config r) && not (isChunkKey k)) $
setUrlPresent k (iaKeyUrl r k)
store :: Remote -> S3Handle -> Storer
store r h = fileStorer $ \k f p -> do
case partSize (hinfo h) of
Just partsz | partsz > 0 -> do
fsz <- fromIntegral . fileSize <$> liftIO (getFileStatus f)
if fsz > partsz
then multipartupload fsz partsz k f p
else singlepartupload k f p
_ -> singlepartupload k f p
-- Store public URL to item in Internet Archive.
when (isIA (hinfo h) && not (isChunkKey k)) $
setUrlPresent k (iaKeyUrl r k)
return True
where
singlepartupload k f p = do
rbody <- liftIO $ httpBodyStorer f p
void $ sendS3Handle h $ putObject h (bucketObject (hinfo h) k) rbody
multipartupload fsz partsz k f p = do
#if MIN_VERSION_aws(0,10,6)
let info = hinfo h
let object = bucketObject info k
return ok
let startreq = (S3.postInitiateMultipartUpload (bucket info) object)
{ S3.imuStorageClass = Just (storageClass info)
, S3.imuMetadata = metaHeaders info
, S3.imuAutoMakeBucket = isIA info
, S3.imuExpires = Nothing -- TODO set some reasonable expiry
}
uploadid <- S3.imurUploadId <$> sendS3Handle h startreq
store :: (AWSConnection, Bucket) -> Remote -> Key -> MeterUpdate -> FilePath -> IO (AWSResult ())
store (conn, bucket) r k p file = do
size <- (fromIntegral . fileSize <$> getFileStatus file) :: IO Integer
withMeteredFile file p $ \content -> do
-- size is provided to S3 so the whole content
-- does not need to be buffered to calculate it
let object = S3Object
bucket (bucketFile r k) ""
(("Content-Length", show size) : getXheaders (config r))
content
sendObject conn $
setStorageClass (getStorageClass $ config r) object
-- The actual part size will be a even multiple of the
-- 32k chunk size that hGetUntilMetered uses.
let partsz' = (partsz `div` toInteger defaultChunkSize) * toInteger defaultChunkSize
prepareRetrieve :: Remote -> Preparer Retriever
prepareRetrieve r = resourcePrepare (const $ s3Action r False) $ \(conn, bucket) ->
byteRetriever $ \k sink ->
liftIO (getObject conn $ bucketKey r bucket k)
>>= either s3Error (sink . obj_data)
-- Send parts of the file, taking care to stream each part
-- w/o buffering in memory, since the parts can be large.
etags <- bracketIO (openBinaryFile f ReadMode) hClose $ \fh -> do
let sendparts meter etags partnum = do
pos <- liftIO $ hTell fh
if pos >= fsz
then return (reverse etags)
else do
-- Calculate size of part that will
-- be read.
let sz = if fsz - pos < partsz'
then fsz - pos
else partsz'
let p' = offsetMeterUpdate p (toBytesProcessed pos)
let numchunks = ceiling (fromIntegral sz / fromIntegral defaultChunkSize :: Double)
let popper = handlePopper numchunks defaultChunkSize p' fh
let req = S3.uploadPart (bucket info) object partnum uploadid $
RequestBodyStream (fromIntegral sz) popper
S3.UploadPartResponse _ etag <- sendS3Handle h req
sendparts (offsetMeterUpdate meter (toBytesProcessed sz)) (etag:etags) (partnum + 1)
sendparts p [] 1
void $ sendS3Handle h $ S3.postCompleteMultipartUpload
(bucket info) object uploadid (zip [1..] etags)
#else
warning $ "Cannot do multipart upload (partsize " ++ show partsz ++ ") of large file (" ++ show fsz ++ "); built with too old a version of the aws library."
singlepartupload k f p
#endif
{- Implemented as a fileRetriever, that uses conduit to stream the chunks
- out to the file. Would be better to implement a byteRetriever, but
- that is difficult. -}
retrieve :: S3Handle -> Retriever
retrieve h = fileRetriever $ \f k p -> liftIO $ runResourceT $ do
(fr, fh) <- allocate (openFile f WriteMode) hClose
let req = S3.getObject (bucket info) (bucketObject info k)
S3.GetObjectResponse { S3.gorResponse = rsp } <- sendS3Handle' h req
responseBody rsp $$+- sinkprogressfile fh p zeroBytesProcessed
release fr
where
info = hinfo h
sinkprogressfile fh meterupdate sofar = do
mbs <- await
case mbs of
Nothing -> return ()
Just bs -> do
let sofar' = addBytesProcessed sofar (S.length bs)
liftIO $ do
void $ meterupdate sofar'
S.hPut fh bs
sinkprogressfile fh meterupdate sofar'
retrieveCheap :: Key -> FilePath -> Annex Bool
retrieveCheap _ _ = return False
@ -166,61 +243,236 @@ retrieveCheap _ _ = return False
{- Internet Archive doesn't easily allow removing content.
- While it may remove the file, there are generally other files
- derived from it that it does not remove. -}
remove :: Remote -> RemoteConfig -> Remover
remove r c k
| configIA c = do
remove :: S3Handle -> Remover
remove h k
| isIA info = do
warning "Cannot remove content from the Internet Archive"
return False
| otherwise = remove' r k
remove' :: Remote -> Key -> Annex Bool
remove' r k = s3Action r False $ \(conn, bucket) ->
s3Bool =<< liftIO (deleteObject conn $ bucketKey r bucket k)
checkKey :: Remote -> CheckPresent
checkKey r k = s3Action r noconn $ \(conn, bucket) -> do
showAction $ "checking " ++ name r
res <- liftIO $ getObjectInfo conn $ bucketKey r bucket k
case res of
Right _ -> return True
Left (AWSError _ _) -> return False
Left e -> s3Error e
| otherwise = do
res <- tryNonAsync $ sendS3Handle h $
S3.DeleteObject (bucketObject info k) (bucket info)
return $ either (const False) (const True) res
where
noconn = error "S3 not configured"
s3Warning :: ReqError -> Annex Bool
s3Warning e = do
warning $ prettyReqError e
return False
info = hinfo h
s3Error :: ReqError -> a
s3Error e = error $ prettyReqError e
checkKey :: Remote -> S3Handle -> CheckPresent
checkKey r h k = do
showAction $ "checking " ++ name r
#if MIN_VERSION_aws(0,10,0)
rsp <- go
return (isJust $ S3.horMetadata rsp)
#else
catchMissingException $ do
void go
return True
#endif
where
go = sendS3Handle h $
S3.headObject (bucket (hinfo h)) (bucketObject (hinfo h) k)
s3Bool :: AWSResult () -> Annex Bool
s3Bool (Right _) = return True
s3Bool (Left e) = s3Warning e
#if ! MIN_VERSION_aws(0,10,0)
{- Catch exception headObject returns when an object is not present
- in the bucket, and returns False. All other exceptions indicate a
- check error and are let through. -}
catchMissingException :: Annex Bool -> Annex Bool
catchMissingException a = catchJust missing a (const $ return False)
where
missing :: AWS.HeaderException -> Maybe ()
missing e
| AWS.headerErrorMessage e == "ETag missing" = Just ()
| otherwise = Nothing
#endif
s3Action :: Remote -> a -> ((AWSConnection, Bucket) -> Annex a) -> Annex a
s3Action r noconn action = do
let bucket = M.lookup "bucket" $ config r
conn <- s3Connection (config r) (uuid r)
case (bucket, conn) of
(Just b, Just c) -> action (c, b)
_ -> return noconn
{- Generate the bucket if it does not already exist, including creating the
- UUID file within the bucket.
-
- Some ACLs can allow read/write to buckets, but not querying them,
- so first check if the UUID file already exists and we can skip doing
- anything.
-}
genBucket :: RemoteConfig -> UUID -> Annex ()
genBucket c u = do
showAction "checking bucket"
info <- extractS3Info c
withS3Handle c u info $ \h ->
go h =<< checkUUIDFile c u h
where
go _ (Right True) = noop
go h _ = do
v <- tryNonAsync $ sendS3Handle h (S3.getBucket $ bucket $ hinfo h)
case v of
Right _ -> noop
Left _ -> do
showAction $ "creating bucket in " ++ datacenter
void $ sendS3Handle h $
S3.PutBucket (bucket $ hinfo h) Nothing $
AWS.mkLocationConstraint $
T.pack datacenter
writeUUIDFile c u h
datacenter = fromJust $ M.lookup "datacenter" c
bucketFile :: Remote -> Key -> FilePath
bucketFile r = munge . key2file
{- Writes the UUID to an annex-uuid file within the bucket.
-
- If the file already exists in the bucket, it must match.
-
- Note that IA buckets can only created by having a file
- stored in them. So this also takes care of that.
-}
writeUUIDFile :: RemoteConfig -> UUID -> S3Handle -> Annex ()
writeUUIDFile c u h = do
v <- checkUUIDFile c u h
case v of
Right True -> noop
_ -> void $ sendS3Handle h mkobject
where
file = T.pack $ uuidFile c
uuidb = L.fromChunks [T.encodeUtf8 $ T.pack $ fromUUID u]
mkobject = putObject h file (RequestBodyLBS uuidb)
{- Checks if the UUID file exists in the bucket
- and has the specified UUID already. -}
checkUUIDFile :: RemoteConfig -> UUID -> S3Handle -> Annex (Either SomeException Bool)
checkUUIDFile c u h = tryNonAsync $ check <$> get
where
get = liftIO
. runResourceT
. either (pure . Left) (Right <$$> AWS.loadToMemory)
=<< tryS3 (sendS3Handle h (S3.getObject (bucket (hinfo h)) file))
check (Right (S3.GetObjectMemoryResponse _meta rsp)) =
responseStatus rsp == ok200 && responseBody rsp == uuidb
check (Left _S3Error) = False
file = T.pack $ uuidFile c
uuidb = L.fromChunks [T.encodeUtf8 $ T.pack $ fromUUID u]
uuidFile :: RemoteConfig -> FilePath
uuidFile c = getFilePrefix c ++ "annex-uuid"
putObject :: S3Handle -> T.Text -> RequestBody -> S3.PutObject
putObject h file rbody = (S3.putObject (bucket info) file rbody)
{ S3.poStorageClass = Just (storageClass info)
, S3.poMetadata = metaHeaders info
, S3.poAutoMakeBucket = isIA info
}
where
info = hinfo h
data S3Handle = S3Handle
{ hmanager :: Manager
, hawscfg :: AWS.Configuration
, hs3cfg :: S3.S3Configuration AWS.NormalQuery
, hinfo :: S3Info
}
{- Sends a request to S3 and gets back the response.
-
- Note that pureAws's use of ResourceT is bypassed here;
- the response should be fully processed while the S3Handle
- is still open, eg within a call to withS3Handle.
-}
sendS3Handle
:: (AWS.Transaction req res, AWS.ServiceConfiguration req ~ S3.S3Configuration)
=> S3Handle
-> req
-> Annex res
sendS3Handle h r = liftIO $ runResourceT $ sendS3Handle' h r
sendS3Handle'
:: (AWS.Transaction r a, AWS.ServiceConfiguration r ~ S3.S3Configuration)
=> S3Handle
-> r
-> ResourceT IO a
sendS3Handle' h = AWS.pureAws (hawscfg h) (hs3cfg h) (hmanager h)
withS3Handle :: RemoteConfig -> UUID -> S3Info -> (S3Handle -> Annex a) -> Annex a
withS3Handle c u info a = do
creds <- getRemoteCredPairFor "S3" c (AWS.creds u)
awscreds <- liftIO $ AWS.genCredentials $ fromMaybe nocreds creds
let awscfg = AWS.Configuration AWS.Timestamp awscreds (AWS.defaultLog AWS.Error)
bracketIO (newManager httpcfg) closeManager $ \mgr ->
a $ S3Handle mgr awscfg s3cfg info
where
s3cfg = s3Configuration c
httpcfg = defaultManagerSettings
{ managerResponseTimeout = Nothing }
nocreds = error "Cannot use S3 without credentials configured"
s3Configuration :: RemoteConfig -> S3.S3Configuration AWS.NormalQuery
s3Configuration c = (S3.s3 proto endpoint False) { S3.s3Port = port }
where
proto
| port == 443 = AWS.HTTPS
| otherwise = AWS.HTTP
host = fromJust $ M.lookup "host" c
datacenter = fromJust $ M.lookup "datacenter" c
-- When the default S3 host is configured, connect directly to
-- the S3 endpoint for the configured datacenter.
-- When another host is configured, it's used as-is.
endpoint
| host == AWS.s3DefaultHost = AWS.s3HostName $ T.pack datacenter
| otherwise = T.encodeUtf8 $ T.pack host
port = let s = fromJust $ M.lookup "port" c in
case reads s of
[(p, _)] -> p
_ -> error $ "bad S3 port value: " ++ s
tryS3 :: Annex a -> Annex (Either S3.S3Error a)
tryS3 a = (Right <$> a) `catch` (pure . Left)
data S3Info = S3Info
{ bucket :: S3.Bucket
, storageClass :: S3.StorageClass
, bucketObject :: Key -> T.Text
, metaHeaders :: [(T.Text, T.Text)]
, partSize :: Maybe Integer
, isIA :: Bool
}
extractS3Info :: RemoteConfig -> Annex S3Info
extractS3Info c = do
b <- maybe
(error "S3 bucket not configured")
(return . T.pack)
(getBucketName c)
return $ S3Info
{ bucket = b
, storageClass = getStorageClass c
, bucketObject = T.pack . getBucketObject c
, metaHeaders = getMetaHeaders c
, partSize = getPartSize c
, isIA = configIA c
}
getBucketName :: RemoteConfig -> Maybe BucketName
getBucketName = M.lookup "bucket"
getStorageClass :: RemoteConfig -> S3.StorageClass
getStorageClass c = case M.lookup "storageclass" c of
Just "REDUCED_REDUNDANCY" -> S3.ReducedRedundancy
_ -> S3.Standard
getPartSize :: RemoteConfig -> Maybe Integer
getPartSize c = readSize dataUnits =<< M.lookup "partsize" c
getMetaHeaders :: RemoteConfig -> [(T.Text, T.Text)]
getMetaHeaders = map munge . filter ismetaheader . M.assocs
where
ismetaheader (h, _) = metaprefix `isPrefixOf` h
metaprefix = "x-amz-meta-"
metaprefixlen = length metaprefix
munge (k, v) = (T.pack $ drop metaprefixlen k, T.pack v)
getFilePrefix :: RemoteConfig -> String
getFilePrefix = M.findWithDefault "" "fileprefix"
getBucketObject :: RemoteConfig -> Key -> FilePath
getBucketObject c = munge . key2file
where
munge s = case M.lookup "mungekeys" c of
Just "ia" -> iaMunge $ filePrefix c ++ s
_ -> filePrefix c ++ s
c = config r
filePrefix :: RemoteConfig -> String
filePrefix = M.findWithDefault "" "fileprefix"
bucketKey :: Remote -> Bucket -> Key -> S3Object
bucketKey r bucket k = S3Object bucket (bucketFile r k) "" [] L.empty
Just "ia" -> iaMunge $ getFilePrefix c ++ s
_ -> getFilePrefix c ++ s
{- Internet Archive limits filenames to a subset of ascii,
- with no whitespace. Other characters are xml entity
@ -234,118 +486,20 @@ iaMunge = (>>= munge)
| isSpace c = []
| otherwise = "&" ++ show (ord c) ++ ";"
{- Generate the bucket if it does not already exist, including creating the
- UUID file within the bucket.
-
- To check if the bucket exists, ask for its location. However, some ACLs
- can allow read/write to buckets, but not querying location, so first
- check if the UUID file already exists and we can skip doing anything.
-}
genBucket :: RemoteConfig -> UUID -> Annex ()
genBucket c u = do
conn <- s3ConnectionRequired c u
showAction "checking bucket"
unlessM ((== Right True) <$> checkUUIDFile c u conn) $ do
loc <- liftIO $ getBucketLocation conn bucket
case loc of
Right _ -> writeUUIDFile c u
Left err@(NetworkError _) -> s3Error err
Left (AWSError _ _) -> do
showAction $ "creating bucket in " ++ datacenter
res <- liftIO $ createBucketIn conn bucket datacenter
case res of
Right _ -> writeUUIDFile c u
Left err -> s3Error err
where
bucket = fromJust $ getBucket c
datacenter = fromJust $ M.lookup "datacenter" c
{- Writes the UUID to an annex-uuid file within the bucket.
-
- If the file already exists in the bucket, it must match.
-
- Note that IA items do not get created by createBucketIn.
- Rather, they are created the first time a file is stored in them.
- So this also takes care of that.
-}
writeUUIDFile :: RemoteConfig -> UUID -> Annex ()
writeUUIDFile c u = do
conn <- s3ConnectionRequired c u
v <- checkUUIDFile c u conn
case v of
Left e -> error e
Right True -> return ()
Right False -> do
let object = setStorageClass (getStorageClass c) (mkobject uuidb)
either s3Error return =<< liftIO (sendObject conn object)
where
file = uuidFile c
uuidb = L.fromChunks [T.encodeUtf8 $ T.pack $ fromUUID u]
bucket = fromJust $ getBucket c
mkobject = S3Object bucket file "" (getXheaders c)
{- Checks if the UUID file exists in the bucket and has the specified UUID already. -}
checkUUIDFile :: RemoteConfig -> UUID -> AWSConnection -> Annex (Either String Bool)
checkUUIDFile c u conn = check <$> liftIO (tryNonAsync $ getObject conn $ mkobject L.empty)
where
check (Right (Right o))
| obj_data o == uuidb = Right True
| otherwise = Left $ "This bucket is already in use by a different S3 special remote, with UUID: " ++ show (obj_data o)
check _ = Right False
uuidb = L.fromChunks [T.encodeUtf8 $ T.pack $ fromUUID u]
bucket = fromJust $ getBucket c
file = uuidFile c
mkobject = S3Object bucket file "" (getXheaders c)
uuidFile :: RemoteConfig -> FilePath
uuidFile c = filePrefix c ++ "annex-uuid"
s3ConnectionRequired :: RemoteConfig -> UUID -> Annex AWSConnection
s3ConnectionRequired c u =
maybe (error "Cannot connect to S3") return =<< s3Connection c u
s3Connection :: RemoteConfig -> UUID -> Annex (Maybe AWSConnection)
s3Connection c u = go =<< getRemoteCredPairFor "S3" c (AWS.creds u)
where
go Nothing = return Nothing
go (Just (ak, sk)) = return $ Just $ AWSConnection host port ak sk
host = fromJust $ M.lookup "host" c
port = let s = fromJust $ M.lookup "port" c in
case reads s of
[(p, _)] -> p
_ -> error $ "bad S3 port value: " ++ s
getBucket :: RemoteConfig -> Maybe Bucket
getBucket = M.lookup "bucket"
getStorageClass :: RemoteConfig -> StorageClass
getStorageClass c = case fromJust $ M.lookup "storageclass" c of
"REDUCED_REDUNDANCY" -> REDUCED_REDUNDANCY
_ -> STANDARD
getXheaders :: RemoteConfig -> [(String, String)]
getXheaders = filter isxheader . M.assocs
where
isxheader (h, _) = "x-amz-" `isPrefixOf` h
configIA :: RemoteConfig -> Bool
configIA = maybe False isIAHost . M.lookup "host"
{- Hostname to use for archive.org S3. -}
iaHost :: HostName
iaHost = "s3.us.archive.org"
configIA :: RemoteConfig -> Bool
configIA c = maybe False isIAHost (M.lookup "host" c)
isIAHost :: HostName -> Bool
isIAHost h = ".archive.org" `isSuffixOf` map toLower h
iaItemUrl :: Bucket -> URLString
iaItemUrl bucket = "http://archive.org/details/" ++ bucket
iaItemUrl :: BucketName -> URLString
iaItemUrl b = "http://archive.org/details/" ++ b
iaKeyUrl :: Remote -> Key -> URLString
iaKeyUrl r k = "http://archive.org/download/" ++ bucket ++ "/" ++ bucketFile r k
iaKeyUrl r k = "http://archive.org/download/" ++ b ++ "/" ++ getBucketObject (config r) k
where
bucket = fromMaybe "" $ getBucket $ config r
b = fromMaybe "" $ getBucketName $ config r