c5b8484c2e
Now it suffices to run git remote add, followed by git-annex sync. Now the remote is automatically initialized for use by git-annex, where before the git-annex branch had to manually be pushed before using git-annex sync. Note that this involved changes to git-annex-shell, so if the remote is using an old version, the manual push is still needed. Implementation required git-annex-shell be changed, so configlist can autoinit a repository even when no git-annex branch has been pushed yet. Unfortunate because we'll have to wait for it to get deployed to servers before being able to rely on this change in the documentation. Did consider making git-annex sync push the git-annex branch to repos that didn't have a uuid, but this seemed difficult to do without complicating it in messy ways. It would be cleaner to split a command out from configlist to handle the initialization. But this is difficult without sacrificing backwards compatability, for users of old git-annex versions which would not use the new command.
600 lines
19 KiB
Haskell
600 lines
19 KiB
Haskell
{- S3 remotes
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-
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- Copyright 2011-2015 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE CPP #-}
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module Remote.S3 (remote, iaHost, configIA, iaItemUrl) where
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import qualified Aws as AWS
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import qualified Aws.Core as AWS
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import qualified Aws.S3 as S3
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import qualified Data.Text as T
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import qualified Data.Text.Encoding as T
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import qualified Data.ByteString.Lazy as L
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import qualified Data.ByteString as S
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import qualified Data.Map as M
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import Data.Char
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import Network.Socket (HostName)
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import Network.HTTP.Conduit (Manager, newManager, closeManager)
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import Network.HTTP.Client (defaultManagerSettings, managerResponseTimeout, responseStatus, responseBody, RequestBody(..))
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import Network.HTTP.Types
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import Control.Monad.Trans.Resource
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import Control.Monad.Catch
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import Data.Conduit
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import Data.IORef
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import Data.Bits.Utils
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import System.Log.Logger
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import Common.Annex
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import Types.Remote
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import Types.Key
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import qualified Git
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import Config
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import Config.Cost
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import Remote.Helper.Special
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import Remote.Helper.Http
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import qualified Remote.Helper.AWS as AWS
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import Creds
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import Annex.UUID
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import Logs.Web
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import Utility.Metered
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import Utility.DataUnits
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import Annex.Content
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import Annex.Url (withUrlOptions)
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import Utility.Url (checkBoth)
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type BucketName = String
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remote :: RemoteType
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remote = RemoteType {
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typename = "S3",
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enumerate = const (findSpecialRemotes "s3"),
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generate = gen,
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setup = s3Setup
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}
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gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
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gen r u c gc = do
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cst <- remoteCost gc expensiveRemoteCost
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info <- extractS3Info c
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return $ new cst info
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where
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new cst info = Just $ specialRemote c
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(prepareS3Handle this $ store this info)
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(prepareS3HandleMaybe this $ retrieve this info)
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(prepareS3Handle this $ remove info)
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(prepareS3HandleMaybe this $ checkKey this info)
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this
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where
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this = Remote
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{ uuid = u
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, cost = cst
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, name = Git.repoDescribe r
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, storeKey = storeKeyDummy
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, retrieveKeyFile = retreiveKeyFileDummy
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, retrieveKeyFileCheap = retrieveCheap
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, removeKey = removeKeyDummy
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, checkPresent = checkPresentDummy
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, checkPresentCheap = False
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, whereisKey = Just (getWebUrls info)
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, remoteFsck = Nothing
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, repairRepo = Nothing
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, config = c
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, repo = r
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, gitconfig = gc
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, localpath = Nothing
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, readonly = False
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, availability = GloballyAvailable
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, remotetype = remote
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, mkUnavailable = gen r u (M.insert "host" "!dne!" c) gc
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, getInfo = includeCredsInfo c (AWS.creds u) (s3Info c info)
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, claimUrl = Nothing
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, checkUrl = Nothing
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}
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s3Setup :: Maybe UUID -> Maybe CredPair -> RemoteConfig -> Annex (RemoteConfig, UUID)
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s3Setup mu mcreds c = do
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u <- maybe (liftIO genUUID) return mu
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s3Setup' (isNothing mu) u mcreds c
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s3Setup' :: Bool -> UUID -> Maybe CredPair -> RemoteConfig -> Annex (RemoteConfig, UUID)
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s3Setup' new u mcreds c = if configIA c then archiveorg else defaulthost
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where
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remotename = fromJust (M.lookup "name" c)
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defbucket = remotename ++ "-" ++ fromUUID u
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defaults = M.fromList
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[ ("datacenter", T.unpack $ AWS.defaultRegion AWS.S3)
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, ("storageclass", "STANDARD")
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, ("host", AWS.s3DefaultHost)
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, ("port", "80")
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, ("bucket", defbucket)
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]
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use fullconfig = do
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gitConfigSpecialRemote u fullconfig "s3" "true"
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return (fullconfig, u)
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defaulthost = do
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(c', encsetup) <- encryptionSetup c
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c'' <- setRemoteCredPair encsetup c' (AWS.creds u) mcreds
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let fullconfig = c'' `M.union` defaults
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when new $
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genBucket fullconfig u
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use fullconfig
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archiveorg = do
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showNote "Internet Archive mode"
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c' <- setRemoteCredPair noEncryptionUsed c (AWS.creds u) mcreds
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-- Ensure user enters a valid bucket name, since
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-- this determines the name of the archive.org item.
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let validbucket = replace " " "-" $
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fromMaybe (error "specify bucket=") $
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getBucketName c'
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let archiveconfig =
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-- IA acdepts x-amz-* as an alias for x-archive-*
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M.mapKeys (replace "x-archive-" "x-amz-") $
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-- encryption does not make sense here
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M.insert "encryption" "none" $
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M.insert "bucket" validbucket $
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M.union c' $
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-- special constraints on key names
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M.insert "mungekeys" "ia" defaults
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info <- extractS3Info archiveconfig
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withS3Handle archiveconfig u $
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writeUUIDFile archiveconfig u info
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use archiveconfig
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-- Sets up a http connection manager for S3 endpoint, which allows
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-- http connections to be reused across calls to the helper.
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prepareS3Handle :: Remote -> (S3Handle -> helper) -> Preparer helper
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prepareS3Handle r = resourcePrepare $ const $
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withS3Handle (config r) (uuid r)
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-- Allows for read-only actions, which can be run without a S3Handle.
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prepareS3HandleMaybe :: Remote -> (Maybe S3Handle -> helper) -> Preparer helper
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prepareS3HandleMaybe r = resourcePrepare $ const $
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withS3HandleMaybe (config r) (uuid r)
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store :: Remote -> S3Info -> S3Handle -> Storer
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store _r info h = fileStorer $ \k f p -> do
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case partSize info of
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Just partsz | partsz > 0 -> do
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fsz <- liftIO $ getFileSize f
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if fsz > partsz
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then multipartupload fsz partsz k f p
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else singlepartupload k f p
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_ -> singlepartupload k f p
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-- Store public URL to item in Internet Archive.
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when (isIA info && not (isChunkKey k)) $
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setUrlPresent webUUID k (iaPublicKeyUrl info k)
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return True
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where
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singlepartupload k f p = do
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rbody <- liftIO $ httpBodyStorer f p
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void $ sendS3Handle h $ putObject info (T.pack $ bucketObject info k) rbody
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multipartupload fsz partsz k f p = do
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#if MIN_VERSION_aws(0,10,6)
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let object = T.pack (bucketObject info k)
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let startreq = (S3.postInitiateMultipartUpload (bucket info) object)
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{ S3.imuStorageClass = Just (storageClass info)
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, S3.imuMetadata = metaHeaders info
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, S3.imuAutoMakeBucket = isIA info
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, S3.imuExpires = Nothing -- TODO set some reasonable expiry
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}
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uploadid <- S3.imurUploadId <$> sendS3Handle h startreq
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-- The actual part size will be a even multiple of the
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-- 32k chunk size that hGetUntilMetered uses.
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let partsz' = (partsz `div` toInteger defaultChunkSize) * toInteger defaultChunkSize
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-- Send parts of the file, taking care to stream each part
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-- w/o buffering in memory, since the parts can be large.
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etags <- bracketIO (openBinaryFile f ReadMode) hClose $ \fh -> do
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let sendparts meter etags partnum = do
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pos <- liftIO $ hTell fh
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if pos >= fsz
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then return (reverse etags)
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else do
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-- Calculate size of part that will
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-- be read.
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let sz = if fsz - pos < partsz'
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then fsz - pos
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else partsz'
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let p' = offsetMeterUpdate p (toBytesProcessed pos)
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let numchunks = ceiling (fromIntegral sz / fromIntegral defaultChunkSize :: Double)
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let popper = handlePopper numchunks defaultChunkSize p' fh
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let req = S3.uploadPart (bucket info) object partnum uploadid $
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RequestBodyStream (fromIntegral sz) popper
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S3.UploadPartResponse _ etag <- sendS3Handle h req
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sendparts (offsetMeterUpdate meter (toBytesProcessed sz)) (etag:etags) (partnum + 1)
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sendparts p [] 1
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void $ sendS3Handle h $ S3.postCompleteMultipartUpload
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(bucket info) object uploadid (zip [1..] etags)
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#else
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warning $ "Cannot do multipart upload (partsize " ++ show partsz ++ ") of large file (" ++ show fsz ++ "); built with too old a version of the aws library."
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singlepartupload k f p
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#endif
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{- Implemented as a fileRetriever, that uses conduit to stream the chunks
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- out to the file. Would be better to implement a byteRetriever, but
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- that is difficult. -}
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retrieve :: Remote -> S3Info -> Maybe S3Handle -> Retriever
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retrieve _ info (Just h) = fileRetriever $ \f k p -> liftIO $ runResourceT $ do
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(fr, fh) <- allocate (openFile f WriteMode) hClose
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let req = S3.getObject (bucket info) (T.pack $ bucketObject info k)
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S3.GetObjectResponse { S3.gorResponse = rsp } <- sendS3Handle' h req
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responseBody rsp $$+- sinkprogressfile fh p zeroBytesProcessed
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release fr
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where
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sinkprogressfile fh meterupdate sofar = do
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mbs <- await
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case mbs of
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Nothing -> return ()
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Just bs -> do
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let sofar' = addBytesProcessed sofar (S.length bs)
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liftIO $ do
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void $ meterupdate sofar'
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S.hPut fh bs
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sinkprogressfile fh meterupdate sofar'
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retrieve r info Nothing = case getpublicurl info of
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Nothing -> \_ _ _ -> do
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warnMissingCredPairFor "S3" (AWS.creds $ uuid r)
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return False
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Just geturl -> fileRetriever $ \f k _p ->
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unlessM (downloadUrl [geturl k] f) $
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error "failed to download content"
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retrieveCheap :: Key -> AssociatedFile -> FilePath -> Annex Bool
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retrieveCheap _ _ _ = return False
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{- Internet Archive doesn't easily allow removing content.
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- While it may remove the file, there are generally other files
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- derived from it that it does not remove. -}
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remove :: S3Info -> S3Handle -> Remover
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remove info h k
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| isIA info = do
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warning "Cannot remove content from the Internet Archive"
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return False
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| otherwise = do
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res <- tryNonAsync $ sendS3Handle h $
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S3.DeleteObject (T.pack $ bucketObject info k) (bucket info)
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return $ either (const False) (const True) res
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checkKey :: Remote -> S3Info -> Maybe S3Handle -> CheckPresent
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checkKey r info (Just h) k = do
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showAction $ "checking " ++ name r
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#if MIN_VERSION_aws(0,10,0)
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rsp <- go
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return (isJust $ S3.horMetadata rsp)
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#else
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catchMissingException $ do
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void go
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return True
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#endif
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where
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go = sendS3Handle h $
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S3.headObject (bucket info) (T.pack $ bucketObject info k)
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#if ! MIN_VERSION_aws(0,10,0)
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{- Catch exception headObject returns when an object is not present
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- in the bucket, and returns False. All other exceptions indicate a
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- check error and are let through. -}
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catchMissingException :: Annex Bool -> Annex Bool
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catchMissingException a = catchJust missing a (const $ return False)
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where
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missing :: AWS.HeaderException -> Maybe ()
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missing e
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| AWS.headerErrorMessage e == "ETag missing" = Just ()
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| otherwise = Nothing
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#endif
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checkKey r info Nothing k = case getpublicurl info of
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Nothing -> do
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warnMissingCredPairFor "S3" (AWS.creds $ uuid r)
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error "No S3 credentials configured"
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Just geturl -> do
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showAction $ "checking " ++ name r
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withUrlOptions $ checkBoth (geturl k) (keySize k)
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{- Generate the bucket if it does not already exist, including creating the
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- UUID file within the bucket.
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-
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- Some ACLs can allow read/write to buckets, but not querying them,
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- so first check if the UUID file already exists and we can skip doing
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- anything.
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-}
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genBucket :: RemoteConfig -> UUID -> Annex ()
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genBucket c u = do
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showAction "checking bucket"
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info <- extractS3Info c
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withS3Handle c u $ \h ->
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go info h =<< checkUUIDFile c u info h
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where
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go _ _ (Right True) = noop
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go info h _ = do
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v <- tryNonAsync $ sendS3Handle h (S3.getBucket $ bucket info)
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case v of
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Right _ -> noop
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Left _ -> do
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showAction $ "creating bucket in " ++ datacenter
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void $ sendS3Handle h $ S3.PutBucket
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(bucket info)
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(acl info)
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locconstraint
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writeUUIDFile c u info h
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locconstraint = mkLocationConstraint $ T.pack datacenter
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datacenter = fromJust $ M.lookup "datacenter" c
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{- Writes the UUID to an annex-uuid file within the bucket.
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-
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- If the file already exists in the bucket, it must match.
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-
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- Note that IA buckets can only created by having a file
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- stored in them. So this also takes care of that.
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-}
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writeUUIDFile :: RemoteConfig -> UUID -> S3Info -> S3Handle -> Annex ()
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writeUUIDFile c u info h = do
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v <- checkUUIDFile c u info h
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case v of
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Right True -> noop
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_ -> void $ sendS3Handle h mkobject
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where
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file = T.pack $ uuidFile c
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uuidb = L.fromChunks [T.encodeUtf8 $ T.pack $ fromUUID u]
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mkobject = putObject info file (RequestBodyLBS uuidb)
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{- Checks if the UUID file exists in the bucket
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- and has the specified UUID already. -}
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checkUUIDFile :: RemoteConfig -> UUID -> S3Info -> S3Handle -> Annex (Either SomeException Bool)
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checkUUIDFile c u info h = tryNonAsync $ check <$> get
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where
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get = liftIO
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. runResourceT
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. either (pure . Left) (Right <$$> AWS.loadToMemory)
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=<< tryS3 (sendS3Handle h (S3.getObject (bucket info) file))
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check (Right (S3.GetObjectMemoryResponse _meta rsp)) =
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responseStatus rsp == ok200 && responseBody rsp == uuidb
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check (Left _S3Error) = False
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file = T.pack $ uuidFile c
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uuidb = L.fromChunks [T.encodeUtf8 $ T.pack $ fromUUID u]
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uuidFile :: RemoteConfig -> FilePath
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uuidFile c = getFilePrefix c ++ "annex-uuid"
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data S3Handle = S3Handle
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{ hmanager :: Manager
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, hawscfg :: AWS.Configuration
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, hs3cfg :: S3.S3Configuration AWS.NormalQuery
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}
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{- Sends a request to S3 and gets back the response.
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-
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- Note that pureAws's use of ResourceT is bypassed here;
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- the response should be fully processed while the S3Handle
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- is still open, eg within a call to withS3Handle.
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-}
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sendS3Handle
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:: (AWS.Transaction req res, AWS.ServiceConfiguration req ~ S3.S3Configuration)
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=> S3Handle
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-> req
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-> Annex res
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sendS3Handle h r = liftIO $ runResourceT $ sendS3Handle' h r
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sendS3Handle'
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:: (AWS.Transaction r a, AWS.ServiceConfiguration r ~ S3.S3Configuration)
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=> S3Handle
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-> r
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-> ResourceT IO a
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sendS3Handle' h r = AWS.pureAws (hawscfg h) (hs3cfg h) (hmanager h) r
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withS3Handle :: RemoteConfig -> UUID -> (S3Handle -> Annex a) -> Annex a
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withS3Handle c u a = withS3HandleMaybe c u $ \mh -> case mh of
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Just h -> a h
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Nothing -> do
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warnMissingCredPairFor "S3" (AWS.creds u)
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error "No S3 credentials configured"
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withS3HandleMaybe :: RemoteConfig -> UUID -> (Maybe S3Handle -> Annex a) -> Annex a
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withS3HandleMaybe c u a = do
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mcreds <- getRemoteCredPair c (AWS.creds u)
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case mcreds of
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Just creds -> do
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awscreds <- liftIO $ genCredentials creds
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let awscfg = AWS.Configuration AWS.Timestamp awscreds debugMapper
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bracketIO (newManager httpcfg) closeManager $ \mgr ->
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a $ Just $ S3Handle mgr awscfg s3cfg
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Nothing -> a Nothing
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where
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s3cfg = s3Configuration c
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httpcfg = defaultManagerSettings
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{ managerResponseTimeout = Nothing }
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s3Configuration :: RemoteConfig -> S3.S3Configuration AWS.NormalQuery
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s3Configuration c = (S3.s3 proto endpoint False) { S3.s3Port = port }
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where
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proto
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| port == 443 = AWS.HTTPS
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| otherwise = AWS.HTTP
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host = fromJust $ M.lookup "host" c
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datacenter = fromJust $ M.lookup "datacenter" c
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-- When the default S3 host is configured, connect directly to
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-- the S3 endpoint for the configured datacenter.
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-- When another host is configured, it's used as-is.
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endpoint
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| host == AWS.s3DefaultHost = AWS.s3HostName $ T.pack datacenter
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| otherwise = T.encodeUtf8 $ T.pack host
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port = let s = fromJust $ M.lookup "port" c in
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case reads s of
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[(p, _)] -> p
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_ -> error $ "bad S3 port value: " ++ s
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|
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tryS3 :: Annex a -> Annex (Either S3.S3Error a)
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tryS3 a = (Right <$> a) `catch` (pure . Left)
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data S3Info = S3Info
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{ bucket :: S3.Bucket
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, storageClass :: S3.StorageClass
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, bucketObject :: Key -> String
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, metaHeaders :: [(T.Text, T.Text)]
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, partSize :: Maybe Integer
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, isIA :: Bool
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, public :: Bool
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, getpublicurl :: Maybe (Key -> URLString)
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}
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extractS3Info :: RemoteConfig -> Annex S3Info
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extractS3Info c = do
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b <- maybe
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(error "S3 bucket not configured")
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(return . T.pack)
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(getBucketName c)
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let info = S3Info
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{ bucket = b
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, storageClass = getStorageClass c
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, bucketObject = getBucketObject c
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, metaHeaders = getMetaHeaders c
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, partSize = getPartSize c
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, isIA = configIA c
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, public = case M.lookup "public" c of
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Just "yes" -> True
|
|
_ -> False
|
|
, getpublicurl = case M.lookup "publicurl" c of
|
|
Just u -> Just $ genericPublicKeyUrl info u
|
|
Nothing -> case M.lookup "host" c of
|
|
Just h
|
|
| h == AWS.s3DefaultHost ->
|
|
Just $ awsPublicKeyUrl info
|
|
| isIAHost h ->
|
|
Just $ iaPublicKeyUrl info
|
|
_ -> Nothing
|
|
}
|
|
return info
|
|
|
|
putObject :: S3Info -> T.Text -> RequestBody -> S3.PutObject
|
|
putObject info file rbody = (S3.putObject (bucket info) file rbody)
|
|
{ S3.poStorageClass = Just (storageClass info)
|
|
, S3.poMetadata = metaHeaders info
|
|
, S3.poAutoMakeBucket = isIA info
|
|
, S3.poAcl = acl info
|
|
}
|
|
|
|
acl :: S3Info -> Maybe S3.CannedAcl
|
|
acl info
|
|
| public info = Just S3.AclPublicRead
|
|
| otherwise = Nothing
|
|
|
|
getBucketName :: RemoteConfig -> Maybe BucketName
|
|
getBucketName = map toLower <$$> 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 $ getFilePrefix c ++ s
|
|
_ -> getFilePrefix c ++ s
|
|
|
|
{- Internet Archive limits filenames to a subset of ascii,
|
|
- with no whitespace. Other characters are xml entity
|
|
- encoded. -}
|
|
iaMunge :: String -> String
|
|
iaMunge = (>>= munge)
|
|
where
|
|
munge c
|
|
| isAsciiUpper c || isAsciiLower c || isNumber c = [c]
|
|
| c `elem` ("_-.\"" :: String) = [c]
|
|
| isSpace c = []
|
|
| otherwise = "&" ++ show (ord c) ++ ";"
|
|
|
|
configIA :: RemoteConfig -> Bool
|
|
configIA = maybe False isIAHost . M.lookup "host"
|
|
|
|
{- Hostname to use for archive.org S3. -}
|
|
iaHost :: HostName
|
|
iaHost = "s3.us.archive.org"
|
|
|
|
isIAHost :: HostName -> Bool
|
|
isIAHost h = ".archive.org" `isSuffixOf` map toLower h
|
|
|
|
iaItemUrl :: BucketName -> URLString
|
|
iaItemUrl b = "http://archive.org/details/" ++ b
|
|
|
|
iaPublicKeyUrl :: S3Info -> Key -> URLString
|
|
iaPublicKeyUrl info = genericPublicKeyUrl info $
|
|
"http://archive.org/download/" ++ T.unpack (bucket info) ++ "/"
|
|
|
|
awsPublicKeyUrl :: S3Info -> Key -> URLString
|
|
awsPublicKeyUrl info = genericPublicKeyUrl info $
|
|
"https://" ++ T.unpack (bucket info) ++ ".s3.amazonaws.com/"
|
|
|
|
genericPublicKeyUrl :: S3Info -> URLString -> Key -> URLString
|
|
genericPublicKeyUrl info baseurl k = baseurl ++ bucketObject info k
|
|
|
|
genCredentials :: CredPair -> IO AWS.Credentials
|
|
genCredentials (keyid, secret) = AWS.Credentials
|
|
<$> pure (T.encodeUtf8 (T.pack keyid))
|
|
<*> pure (T.encodeUtf8 (T.pack secret))
|
|
<*> newIORef []
|
|
<*> pure Nothing
|
|
|
|
mkLocationConstraint :: AWS.Region -> S3.LocationConstraint
|
|
mkLocationConstraint "US" = S3.locationUsClassic
|
|
mkLocationConstraint r = r
|
|
|
|
debugMapper :: AWS.Logger
|
|
debugMapper level t = forward "S3" (T.unpack t)
|
|
where
|
|
forward = case level of
|
|
AWS.Debug -> debugM
|
|
AWS.Info -> infoM
|
|
AWS.Warning -> warningM
|
|
AWS.Error -> errorM
|
|
|
|
s3Info :: RemoteConfig -> S3Info -> [(String, String)]
|
|
s3Info c info = catMaybes
|
|
[ Just ("bucket", fromMaybe "unknown" (getBucketName c))
|
|
, Just ("endpoint", w82s (S.unpack (S3.s3Endpoint s3c)))
|
|
, Just ("port", show (S3.s3Port s3c))
|
|
, Just ("storage class", show (getStorageClass c))
|
|
, if configIA c
|
|
then Just ("internet archive item", iaItemUrl $ fromMaybe "unknown" $ getBucketName c)
|
|
else Nothing
|
|
, Just ("partsize", maybe "unlimited" (roughSize storageUnits False) (getPartSize c))
|
|
, Just ("public", if public info then "yes" else "no")
|
|
]
|
|
where
|
|
s3c = s3Configuration c
|
|
|
|
getWebUrls :: S3Info -> Key -> Annex [URLString]
|
|
getWebUrls info k = case (public info, getpublicurl info) of
|
|
(True, Just geturl) -> return [geturl k]
|
|
_ -> return []
|
|
|