author | nemo |
Mon, 15 Jun 2009 13:48:31 +0000 | |
changeset 2164 | 3d7e8afd869d |
parent 2117 | 1ac0e10e546f |
child 2172 | 80d34c0b9dfe |
permissions | -rw-r--r-- |
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module Main where |
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Add caching for accounts information (entries are stored in memory forever)
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import Prelude hiding (catch) |
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import Control.Monad |
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import Control.Exception |
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import System.IO |
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import Maybe |
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import Database.HDBC |
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import Database.HDBC.MySQL |
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-------------------------- |
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import CoreTypes |
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dbQueryString = |
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"select users.pass, users_roles.rid from users left join users_roles on users.uid = users_roles.uid where users.name = ?" |
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dbInteractionLoop dbConn = forever $ do |
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q <- (getLine >>= return . read) |
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response <- case q of |
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CheckAccount clUid clNick _ -> do |
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statement <- prepare dbConn dbQueryString |
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execute statement [SqlString $ clNick] |
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passAndRole <- fetchRow statement |
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finish statement |
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if isJust passAndRole then |
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return $ ( |
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clUid, |
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HasAccount |
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(fromSql $ head $ fromJust $ passAndRole) |
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((fromSql $ last $ fromJust $ passAndRole) == (Just (3 :: Int))) |
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) |
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else |
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return $ (clUid, Guest) |
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putStrLn (show response) |
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hFlush stdout |
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dbConnectionLoop mySQLConnectionInfo = |
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Control.Exception.handle (\e -> return ()) $ handleSqlError $ |
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bracket |
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(connectMySQL mySQLConnectionInfo) |
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(disconnect) |
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(dbInteractionLoop) |
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processRequest :: DBQuery -> IO String |
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processRequest (CheckAccount clUid clNick clHost) = return $ show (clUid, Guest) |
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main = do |
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dbHost <- getLine |
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dbLogin <- getLine |
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dbPassword <- getLine |
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let mySQLConnectInfo = defaultMySQLConnectInfo {mysqlHost = dbHost, mysqlDatabase = "hedge_main", mysqlUser = dbLogin, mysqlPassword = dbPassword} |
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dbConnectionLoop mySQLConnectInfo |