author | nemo |
Sun, 21 Jun 2009 17:47:57 +0000 | |
changeset 2182 | ed7e7eb3f9ed |
parent 2172 | 80d34c0b9dfe |
child 2184 | f59f80e034b1 |
permissions | -rw-r--r-- |
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{-# LANGUAGE CPP #-} |
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module OfficialServer.DBInteraction |
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( |
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startDBConnection |
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) where |
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import Prelude hiding (catch); |
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import System.Process |
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import System.IO |
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import Control.Concurrent |
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import Control.Exception |
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import Control.Monad |
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import qualified Data.Map as Map |
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import Monad |
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import Maybe |
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import System.Log.Logger |
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import Data.Time |
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------------------------ |
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import CoreTypes |
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import Utils |
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localAddressList = ["127.0.0.1", "0:0:0:0:0:0:0:1", "0:0:0:0:0:ffff:7f00:1"] |
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fakeDbConnection serverInfo = do |
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q <- readChan $ dbQueries serverInfo |
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case q of |
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CheckAccount clUid _ clHost -> do |
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writeChan (coreChan serverInfo) $ ClientAccountInfo (clUid, |
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if clHost `elem` localAddressList then Admin else Guest) |
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ClearCache -> return () |
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fakeDbConnection serverInfo |
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#if defined(OFFICIAL_SERVER) |
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------------------------------------------------------------------- |
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-- borrowed from base 4.0.0 --------------------------------------- |
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onException :: IO a -> IO b -> IO a -- |
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onException io what = io `catch` \e -> do what -- |
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throw (e :: Exception) -- |
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-- to be deleted -------------------------------------------------- |
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------------------------------------------------------------------- |
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pipeDbConnectionLoop queries coreChan hIn hOut accountsCache = do |
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q <- readChan queries |
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updatedCache <- case q of |
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CheckAccount clUid clNick _ -> do |
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let cacheEntry = clNick `Map.lookup` accountsCache |
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currentTime <- getCurrentTime |
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if (isNothing cacheEntry) || (currentTime `diffUTCTime` (fst . fromJust) cacheEntry > 2 * 24 * 60 * 60) then |
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do |
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hPutStrLn hIn $ show q |
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hFlush hIn |
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(clId, accountInfo) <- hGetLine hOut >>= (maybeException . maybeRead) |
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writeChan coreChan $ ClientAccountInfo (clId, accountInfo) |
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return $ Map.insert clNick (currentTime, accountInfo) accountsCache |
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`onException` |
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(unGetChan queries q) |
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else |
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do |
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writeChan coreChan $ ClientAccountInfo (clUid, snd $ fromJust cacheEntry) |
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return accountsCache |
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ClearCache -> return Map.empty |
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SendStats {} -> do |
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hPutStrLn hIn $ show q |
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hFlush hIn |
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return accountsCache |
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return updatedCache |
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where |
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maybeException (Just a) = return a |
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maybeException Nothing = ioError (userError "Can't read") |
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pipeDbConnection accountsCache serverInfo = do |
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updatedCache <- |
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Control.Exception.handle (\e -> warningM "Database" (show e) >> return accountsCache) $ |
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bracket |
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(createProcess (proc "./OfficialServer/extdbinterface" []) {std_in = CreatePipe, std_out = CreatePipe}) |
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(\(_, _, _, processHandle) -> return accountsCache) |
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(\(Just hIn, Just hOut, _, _) -> do |
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hSetBuffering hIn LineBuffering |
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hSetBuffering hOut LineBuffering |
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hPutStrLn hIn $ dbHost serverInfo |
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hPutStrLn hIn $ dbLogin serverInfo |
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hPutStrLn hIn $ dbPassword serverInfo |
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pipeDbConnectionLoop (dbQueries serverInfo) (coreChan serverInfo) hIn hOut accountsCache |
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) |
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threadDelay (5 * 10^6) |
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pipeDbConnection updatedCache serverInfo |
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dbConnectionLoop serverInfo = |
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if (not . null $ dbHost serverInfo) then |
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pipeDbConnection Map.empty serverInfo |
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else |
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fakeDbConnection serverInfo |
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#else |
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dbConnectionLoop = fakeDbConnection |
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#endif |
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startDBConnection serverInfo = |
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forkIO $ dbConnectionLoop serverInfo |