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{-
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
\-}
{-# LANGUAGE CPP, ScopedTypeVariables, OverloadedStrings #-}
module OfficialServer.DBInteraction
(
startDBConnection
) where
import Prelude hiding (catch);
import Control.Concurrent
import Control.Monad
import Data.List as L
import Data.ByteString.Char8 as B
#if defined(OFFICIAL_SERVER)
import System.Process
import System.IO as SIO
import qualified Control.Exception as Exception
import qualified Data.Map as Map
import Data.Maybe
import Data.Time
import System.Log.Logger
#endif
------------------------
import CoreTypes
#if defined(OFFICIAL_SERVER)
import Utils
#endif
localAddressList :: [B.ByteString]
localAddressList = ["127.0.0.1", "0:0:0:0:0:0:0:1", "0:0:0:0:0:ffff:7f00:1"]
fakeDbConnection :: forall b. ServerInfo -> IO b
fakeDbConnection si = forever $ do
q <- readChan $ dbQueries si
case q of
CheckAccount clId clUid _ clHost ->
writeChan (coreChan si) $ ClientAccountInfo clId clUid (if clHost `L.elem` localAddressList then Admin else Guest)
ClearCache -> return ()
SendStats {} -> return ()
dbConnectionLoop :: ServerInfo -> IO ()
#if defined(OFFICIAL_SERVER)
flushRequests :: ServerInfo -> IO ()
flushRequests si = do
e <- isEmptyChan $ dbQueries si
unless e $ do
q <- readChan $ dbQueries si
case q of
CheckAccount clId clUid _ clHost ->
writeChan (coreChan si) $ ClientAccountInfo clId clUid (if clHost `L.elem` localAddressList then Admin else Guest)
ClearCache -> return ()
SendStats {} -> return ()
GetReplayName {} -> return ()
StoreAchievements {} -> return ()
flushRequests si
pipeDbConnectionLoop :: Chan DBQuery -> Chan CoreMessage -> Handle -> Handle -> Map.Map ByteString (UTCTime, AccountInfo) -> Int -> IO (Map.Map ByteString (UTCTime, AccountInfo), Int)
pipeDbConnectionLoop queries cChan hIn hOut accountsCache req =
Exception.handle (\(e :: Exception.IOException) -> warningM "Database" (show e) >> return (accountsCache, req)) $
do
q <- readChan queries
(updatedCache, newReq) <- case q of
CheckAccount clId clUid clNick _ -> do
let cacheEntry = clNick `Map.lookup` accountsCache
currentTime <- getCurrentTime
if (isNothing cacheEntry) || (currentTime `diffUTCTime` (fst . fromJust) cacheEntry > 10 * 60) then
do
SIO.hPutStrLn hIn $ show q
hFlush hIn
(clId', clUid', accountInfo) <- SIO.hGetLine hOut >>= (maybeException . maybeRead)
writeChan cChan $ ClientAccountInfo clId' clUid' accountInfo
return $ (Map.insert clNick (currentTime, accountInfo) accountsCache, req + 1)
`Exception.onException`
(unGetChan queries q)
else
do
writeChan cChan $ ClientAccountInfo clId clUid (snd $ fromJust cacheEntry)
return (accountsCache, req)
GetReplayName {} -> do
SIO.hPutStrLn hIn $ show q
hFlush hIn
(clId', clUid', accountInfo) <- SIO.hGetLine hOut >>= (maybeException . maybeRead)
writeChan cChan $ ClientAccountInfo clId' clUid' accountInfo
return (accountsCache, req)
ClearCache -> return (Map.empty, req)
StoreAchievements {} -> (
(SIO.hPutStrLn hIn $ show q) >>
hFlush hIn >>
return (accountsCache, req))
`Exception.onException`
(unGetChan queries q)
SendStats {} -> (
(SIO.hPutStrLn hIn $ show q) >>
hFlush hIn >>
return (accountsCache, req))
`Exception.onException`
(unGetChan queries q)
pipeDbConnectionLoop queries cChan hIn hOut updatedCache newReq
where
maybeException (Just a) = return a
maybeException Nothing = ioError (userError "Can't read")
pipeDbConnection ::
Map.Map ByteString (UTCTime, AccountInfo)
-> ServerInfo
-> Int
-> IO ()
pipeDbConnection accountsCache si errNum = do
(updatedCache, newErrNum) <-
Exception.handle (\(e :: Exception.IOException) -> warningM "Database" (show e) >> return (accountsCache, errNum + 1)) $ do
(Just hIn, Just hOut, _, _) <- createProcess (proc "./OfficialServer/extdbinterface" [])
{std_in = CreatePipe,
std_out = CreatePipe}
hSetBuffering hIn LineBuffering
hSetBuffering hOut LineBuffering
B.hPutStrLn hIn $ dbHost si
B.hPutStrLn hIn $ dbName si
B.hPutStrLn hIn $ dbLogin si
B.hPutStrLn hIn $ dbPassword si
(c, r) <- pipeDbConnectionLoop (dbQueries si) (coreChan si) hIn hOut accountsCache 0
return (c, if r > 0 then 0 else errNum + 1)
when (newErrNum > 1) $ flushRequests si
threadDelay (3000000)
pipeDbConnection updatedCache si newErrNum
dbConnectionLoop si =
if (not . B.null $ dbHost si) then
pipeDbConnection Map.empty si 0
else
fakeDbConnection si
#else
dbConnectionLoop = fakeDbConnection
#endif
startDBConnection :: ServerInfo -> IO ()
startDBConnection serverInfo =
forkIO (dbConnectionLoop serverInfo) >> return ()
|
