mirror of https://github.com/voidlizard/hbs2
420 lines
13 KiB
Haskell
420 lines
13 KiB
Haskell
{-# Language TemplateHaskell #-}
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{-# Language UndecidableInstances #-}
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{-# Language RankNTypes #-}
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{-# Language AllowAmbiguousTypes #-}
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module Main where
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import HBS2.Actors.ChunkWriter
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import HBS2.Actors.Peer
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import HBS2.Clock
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import HBS2.Defaults
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import HBS2.Events
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import HBS2.Hash
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import HBS2.Merkle
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import HBS2.Net.Messaging.Fake
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import HBS2.Net.PeerLocator
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import HBS2.Net.Proto
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import HBS2.Net.Proto.BlockAnnounce
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import HBS2.Net.Proto.BlockChunks
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import HBS2.Net.Proto.BlockInfo
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import HBS2.Net.Proto.Sessions
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import HBS2.Prelude.Plated
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import HBS2.Storage
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import HBS2.Storage.Simple
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import HBS2.Storage.Simple.Extra
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import Test.Tasty.HUnit
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import Codec.Serialise hiding (encode,decode)
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import Control.Concurrent.Async
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import Control.Concurrent.STM
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import Control.Concurrent.STM.TBQueue qualified as Q
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import Control.Monad.Reader
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import Control.Monad.Trans.Maybe
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import Data.ByteString.Lazy (ByteString)
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import Data.ByteString.Lazy.Char8 qualified as B8
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import Data.Default
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import Data.Foldable hiding (find)
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import Data.Map (Map)
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import Data.Map qualified as Map
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import Data.Maybe
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import Data.Word
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import Lens.Micro.Platform
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import Prettyprinter hiding (pipe)
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import System.Directory
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import System.Exit
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import System.FilePath.Posix
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import System.IO
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debug :: (MonadIO m) => Doc ann -> m ()
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debug p = liftIO $ hPrint stderr p
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data Fake
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data BlockDownload =
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BlockDownload
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{ _sBlockHash :: Hash HbSync
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, _sBlockSize :: Size
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, _sBlockChunkSize :: ChunkSize
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, _sBlockOffset :: Offset
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, _sBlockWritten :: Size
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}
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deriving stock (Typeable)
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makeLenses 'BlockDownload
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newBlockDownload :: Hash HbSync -> BlockDownload
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newBlockDownload h = BlockDownload h 0 0 0 0
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instance HasPeer Fake where
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newtype instance Peer Fake = FakePeer Word8
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deriving newtype (Hashable,Num,Enum,Real,Integral)
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deriving stock (Eq,Ord,Show)
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instance Pretty (Peer Fake) where
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pretty (FakePeer n) = parens ("peer" <+> pretty n)
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instance HasProtocol Fake (BlockInfo Fake) where
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type instance ProtocolId (BlockInfo Fake) = 1
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type instance Encoded Fake = ByteString
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decode = either (const Nothing) Just . deserialiseOrFail
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encode = serialise
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-- FIXME: 3 is for debug only!
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instance Expires (EventKey Fake (BlockInfo Fake)) where
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expiresIn _ = Just 3
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instance Expires (EventKey Fake (BlockChunks Fake)) where
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expiresIn _ = Just 10
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instance Expires (EventKey Fake (BlockAnnounce Fake)) where
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expiresIn _ = Nothing
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instance HasProtocol Fake (BlockChunks Fake) where
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type instance ProtocolId (BlockChunks Fake) = 2
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type instance Encoded Fake = ByteString
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decode = either (const Nothing) Just . deserialiseOrFail
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encode = serialise
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instance HasProtocol Fake (BlockAnnounce Fake) where
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type instance ProtocolId (BlockAnnounce Fake) = 3
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type instance Encoded Fake = ByteString
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decode = either (const Nothing) Just . deserialiseOrFail
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encode = serialise
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type instance SessionData e (BlockInfo e) = BlockSizeSession e
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type instance SessionData e (BlockChunks e) = BlockDownload
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newtype instance SessionKey e (BlockChunks e) =
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DownloadSessionKey (Peer e, Cookie e)
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deriving stock (Generic,Typeable)
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newtype BlockSizeSession e =
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BlockSizeSession
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{ _bsBlockSizes :: Map (Peer e) Size
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}
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makeLenses 'BlockSizeSession
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instance Ord (Peer e) => Default (BlockSizeSession e) where
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def = BlockSizeSession mempty
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deriving stock instance Show (BlockSizeSession Fake)
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deriving newtype instance Hashable (SessionKey Fake (BlockChunks Fake))
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deriving stock instance Eq (SessionKey Fake (BlockChunks Fake))
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runTestPeer :: Peer Fake
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-> (SimpleStorage HbSync -> ChunkWriter HbSync IO -> IO ())
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-> IO ()
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runTestPeer p zu = do
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dir <- liftIO $ canonicalizePath ( ".peers" </> show (fromIntegral p :: Int))
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let chDir = dir </> "tmp-chunks"
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liftIO $ createDirectoryIfMissing True dir
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let opts = [ StoragePrefix dir
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]
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stor <- simpleStorageInit opts
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cww <- newChunkWriterIO stor (Just chDir)
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sw <- liftIO $ async $ simpleStorageWorker stor
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cw <- liftIO $ async $ runChunkWriter cww
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zu stor cww
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simpleStorageStop stor
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stopChunkWriter cww
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mapM_ cancel [sw,cw]
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handleBlockInfo :: forall e m . ( MonadIO m
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, Sessions e (BlockInfo e) m
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, Default (SessionData e (BlockInfo e))
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, Ord (Peer e)
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, Pretty (Peer e)
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-- , EventEmitter e (BlockSize e) m
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)
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=> (Peer e, Hash HbSync, Maybe Integer)
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-> m ()
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handleBlockInfo (p, h, sz') = do
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maybe1 sz' (pure ()) $ \sz -> do
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let bsz = fromIntegral sz
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update @e def (BlockSizeKey h) (over bsBlockSizes (Map.insert p bsz))
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blockDownloadLoop :: forall e m . ( m ~ PeerM e IO
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, Request e (BlockInfo e) m
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, Request e (BlockChunks e) m
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, EventListener e (BlockInfo e) m
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, EventListener e (BlockChunks e) m
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, EventListener e (BlockAnnounce e) m
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-- , EventEmitter e (BlockChunks e) m
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-- , EventEmitter e (BlockInfo e) m
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, Sessions e (BlockInfo e) m
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, Sessions e (BlockChunks e) m
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, HasStorage m
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, Num (Peer e)
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, Pretty (Peer e)
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-- , Key HbSync ~ Hash HbSync
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) => m ()
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blockDownloadLoop = do
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stor <- getStorage
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let blks = [ "5KP4vM6RuEX6RA1ywthBMqZV5UJDLANC17UrF6zuWdRt"
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, "81JeD7LNR6Q7RYfyWBxfjJn1RsWzvegkUXae6FUNgrMZ"
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, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
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]
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blq <- liftIO $ Q.newTBQueueIO defBlockDownloadQ
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for_ blks $ \b -> liftIO $ atomically $ Q.writeTBQueue blq b
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subscribe @e BlockAnnounceInfoKey $ \(BlockAnnounceEvent p ann) -> do
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let h = view biHash ann
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let s = view biSize ann
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debug $ "BLOCK ANNOUNCE!" <+> pretty p
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<+> pretty h
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<+> pretty (view biSize ann)
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initDownload p h s -- FIXME: don't trust everybody
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fix \next -> do
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h <- liftIO $ atomically $ Q.readTBQueue blq
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here <- liftIO $ hasBlock stor h <&> isJust
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unless here $ do
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subscribe @e (BlockSizeEventKey h) $ \(BlockSizeEvent (p,h,s)) -> do
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initDownload p h s
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peers <- getPeerLocator @e >>= knownPeers @e
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for_ peers $ \p -> do
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debug $ "requesting block" <+> pretty h <+> "from" <+> pretty p
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request p (GetBlockSize @e h)
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liftIO $ print "piu!"
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next
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where
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initDownload p h s = do
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sto <- getStorage
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here <- liftIO $ hasBlock sto h <&> isJust
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if not here then do
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coo <- genCookie (p,h)
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let key = DownloadSessionKey (p, coo)
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let chusz = defChunkSize
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let new = set sBlockChunkSize chusz
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. set sBlockSize (fromIntegral s)
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$ newBlockDownload h
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update @e new key id
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subscribe @e (BlockChunksEventKey h) $ \(BlockReady _) -> do
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processBlock h
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request p (BlockChunks coo (BlockGetAllChunks @e h chusz)) -- FIXME: nicer construction
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else do
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processBlock h
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processBlock h = do
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sto <- getStorage
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debug $ "GOT BLOCK!" <+> pretty h
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-- NOTE: this is an adapter for a ResponseM monad
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-- because response is working in ResponseM monad (ha!)
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-- So don't be confused with types
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--
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mkAdapter :: forall e m . ( m ~ PeerM e IO
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, HasProtocol e (BlockChunks e)
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, Hashable (SessionKey e (BlockChunks e))
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, Sessions e (BlockChunks e) (ResponseM e m)
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, EventEmitter e (BlockChunks e) m
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, Pretty (Peer e)
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, Block ByteString ~ ByteString
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)
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=> ChunkWriter HbSync IO -> m (BlockChunksI e (ResponseM e m ))
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mkAdapter cww = do
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storage <- getStorage
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pure $
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BlockChunksI
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{ blkSize = liftIO . hasBlock storage
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, blkChunk = \h o s -> liftIO (getChunk storage h o s)
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, blkGetHash = \c -> find (DownloadSessionKey @e c) (view sBlockHash)
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-- КАК ТОЛЬКО ПРИНЯЛИ ВСЕ ЧАНКИ (ПРИШЁЛ ПОСЛЕДНИЙ ЧАНК):
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-- СЧИТАЕМ ХЭШ ТОГО, ЧТО ПОЛУЧИЛОСЬ
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-- ЕСЛИ ПОЛУЧИЛОСЬ ХОРОШО --- ТО:
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-- ПЕРЕЗАПИСЫВАЕМ БЛОК В СТОРЕЙДЖ
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-- ГОВОРИМ ОЖИДАЮЩЕЙ СТОРОНЕ, ЧТО БЛОК ПРИНЯТ?
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-- УДАЛЯЕМ КУКУ?
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, blkAcceptChunk = \(c,p,h,n,bs) -> void $ runMaybeT $ do
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let cKey = DownloadSessionKey (p,c)
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-- check if there is a session
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-- FIXME:
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-- TODO: log situation when no session
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dwnld <- MaybeT $ find cKey id
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let bslen = fromIntegral $ B8.length bs
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let mbSize = view sBlockSize dwnld
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let mbChSize = view sBlockChunkSize dwnld
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let offset0 = fromIntegral n * fromIntegral mbChSize :: Offset
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liftIO $ do
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writeChunk cww cKey h offset0 bs
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let written = view sBlockWritten dwnld + bslen
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let maxOff = max offset0 (view sBlockOffset dwnld)
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lift $ update dwnld cKey ( set sBlockOffset maxOff
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. set sBlockWritten written
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)
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let mbDone = (maxOff + fromIntegral mbChSize) > fromIntegral mbSize
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&& written >= mbSize
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when mbDone $ lift do
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deferred (Proxy @(BlockChunks e)) $ do
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h1 <- liftIO $ getHash cww cKey h
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-- ПОСЧИТАТЬ ХЭШ
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-- ЕСЛИ СОШЁЛСЯ - ФИНАЛИЗИРОВАТЬ БЛОК
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-- ЕСЛИ НЕ СОШЁЛСЯ - ТО ПОДОЖДАТЬ ЕЩЕ
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when ( h1 == h ) $ do
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liftIO $ commitBlock cww cKey h
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expire cKey
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emit @e (BlockChunksEventKey h) (BlockReady h)
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when (written > mbSize * defBlockDownloadThreshold) $ do
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debug $ "SESSION DELETED BECAUSE THAT PEER IS JERK:" <+> pretty p
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lift $ expire cKey
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-- ЕСЛИ ТУТ ВИСЕТЬ ДОЛГО, ТО НАС МОЖНО ДИДОСИТЬ,
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-- ПОСЫЛАЯ НЕ ВСЕ БЛОКИ ЧАНКА ИЛИ ПОСЫЛАЯ ОТДЕЛЬНЫЕ
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-- ЧАНКИ ПО МНОГУ РАЗ. А МЫ БУДЕМ ХЭШИ СЧИТАТЬ.
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-- ТАК НЕ ПОЙДЕТ
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-- ТАК ЧТО ТУТ ЖДЁМ, ДОПУСТИМ 2*mbSize и отваливаемся
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}
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main :: IO ()
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main = do
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hSetBuffering stderr LineBuffering
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void $ race (pause (10 :: Timeout 'Seconds)) $ do
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fake <- newFakeP2P True <&> Fabriq
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let (p0:ps) = [0..4] :: [Peer Fake]
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-- others
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others <- forM ps $ \p -> async $ runTestPeer p $ \s cw -> do
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let findBlk = hasBlock s
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let size = 1024*1024
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let blk = B8.concat [ fromString (take 1 $ show x)
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| x <- replicate size (fromIntegral p :: Int)
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]
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root <- putAsMerkle s blk
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rootSz <- hasBlock s (fromMerkleHash root)
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debug $ "I'm" <+> pretty p <+> pretty root
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runPeerM (AnyStorage s) fake p $ do
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adapter <- mkAdapter cw
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env <- ask
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liftIO $ async $ withPeerM env $ do
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maybe1 rootSz (pure ()) $ \rsz -> do
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pause ( 0.01 :: Timeout 'Seconds )
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let info = BlockAnnounceInfo 0 NoBlockInfoMeta rsz (fromMerkleHash root)
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let ann = BlockAnnounce @Fake info
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request @Fake p0 ann
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runProto @Fake
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[ makeResponse (blockSizeProto findBlk dontHandle)
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, makeResponse (blockChunksProto adapter)
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, makeResponse blockAnnounceProto
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]
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our <- async $ runTestPeer p0 $ \s cw -> do
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let blk = hasBlock s
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runPeerM (AnyStorage s) fake p0 $ do
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adapter <- mkAdapter cw
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env <- ask
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pl <- getPeerLocator @Fake
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addPeers @Fake pl ps
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as <- liftIO $ async $ withPeerM env blockDownloadLoop
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runProto @Fake
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[ makeResponse (blockSizeProto blk handleBlockInfo)
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, makeResponse (blockChunksProto adapter)
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, makeResponse blockAnnounceProto
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]
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liftIO $ cancel as
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pause ( 8 :: Timeout 'Seconds)
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mapM_ cancel (our:others)
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(_, e) <- waitAnyCatchCancel (our:others)
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debug (pretty $ show e)
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debug "we're done"
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assertBool "success" True
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exitSuccess
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assertBool "failed" False
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