Version.hs

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-- Copyright 2002, Simon Marlow.
-- Copyright 2006, Bjorn Bringert.
-- Copyright 2009, Henning Thielemann.
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module Network.MoHWS.HTTP.Version (
      T(Cons), major, minor,
      http1_1, http1_0,
      pInRequest,
   ) where

import Text.ParserCombinators.Parsec (Parser, string, digit, many1, char, )
import Network.MoHWS.Utility (readM, )
import Control.Monad (liftM2, )


data T = Cons {major, minor :: Int}
  deriving (Eq,Ord)

instance Show T where
   showsPrec _ v =
      showString "HTTP/" . shows (major v) .
      showString "." . shows (minor v)

http1_1, http1_0 :: T
http1_1 = Cons 1 1
http1_0 = Cons 1 0

pInRequest :: Parser T
pInRequest =
   liftM2 Cons
      (string "HTTP/" >> int)
      (char '.' >> int)

int :: Parser Int
int = many1 digit >>= readM