module Rakka.Utils
( yesOrNo
+ , trueOrFalse
, parseYesOrNo
, maybeA
, deleteIfEmpty
- , formatW3CDateTime
, chomp
+ , guessMIMEType
+ , isSafeChar
+ , mkQueryString
)
where
+import qualified Codec.Binary.UTF8.String as UTF8
import Control.Arrow
import Control.Arrow.ArrowList
-import Data.Time
-import Text.Printf
+import qualified Data.ByteString.Lazy as Lazy (ByteString)
+import qualified Data.ByteString.Lazy.Char8 as L8 hiding (ByteString)
+import Magic
+import Network.HTTP.Lucu
+import Network.URI
+import System.IO.Unsafe
yesOrNo :: Bool -> String
yesOrNo False = "no"
+trueOrFalse :: Bool -> String
+trueOrFalse True = "true"
+trueOrFalse False = "false"
+
+
parseYesOrNo :: ArrowChoice a => a String Bool
parseYesOrNo
= proc str -> do case str of
_ -> returnA -< str
-formatW3CDateTime :: ZonedTime -> String
-formatW3CDateTime zonedTime
- = formatLocalTime (zonedTimeToLocalTime zonedTime)
- ++
- formatTimeZone (zonedTimeZone zonedTime)
+chomp :: String -> String
+chomp = reverse . snd . break (/= '\n') . reverse
+
+
+guessMIMEType :: Lazy.ByteString -> MIMEType
+guessMIMEType = read . unsafePerformIO . magicString magic . L8.unpack
where
- formatLocalTime :: LocalTime -> String
- formatLocalTime localTime
- = let (year, month, day) = toGregorian (localDay localTime)
- timeOfDay = localTimeOfDay localTime
- (secInt, secFrac) = properFraction (todSec timeOfDay)
- in
- (printf "%04d-%02d-%02dT%02d:%02d:%02d"
- year
- month
- day
- (todHour timeOfDay)
- (todMin timeOfDay)
- (secInt :: Int))
- ++
- (if secFrac == 0
- then ""
- else tail (show secFrac))
-
- formatTimeZone :: TimeZone -> String
- formatTimeZone tz
- = case timeZoneMinutes tz of
- offset | offset < 0 -> '-':(showTZ $ negate offset)
- | offset == 0 -> "Z"
- | otherwise -> '+':(showTZ offset)
-
- showTZ :: Int -> String
- showTZ offset
- = let hour = offset `div` 60
- minute = offset - hour * 60
- in
- show2 hour ++ ":" ++ show2 minute
-
- show2 :: Int -> String
- show2 n | n < 10 = '0':(show n)
- | otherwise = show n
+ magic :: Magic
+ magic = unsafePerformIO
+ $ do m <- magicOpen [MagicMime]
+ magicLoadDefault m
+ return m
-chomp :: String -> String
-chomp = reverse . snd . break (/= '\n') . reverse
+isSafeChar :: Char -> Bool
+isSafeChar c
+ | c == '/' = True
+ | isReserved c = False
+ | c > ' ' && c <= '~' = True
+ | otherwise = False
+
+
+mkQueryString :: [(String, String)] -> String
+mkQueryString [] = ""
+mkQueryString ((k, v) : xs) = encode k ++ "=" ++ encode v ++
+ if xs == [] then
+ ""
+ else
+ ';' : mkQueryString(xs)
+ where
+ encode :: String -> String
+ encode = escapeURIString isSafeChar . UTF8.encodeString
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