Printer.hs

{-
Copyright (c) Sebastiaan Visser 2008

All rights reserved.

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modification, are permitted provided that the following conditions
are met:
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   notice, this list of conditions and the following disclaimer.
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   documentation and/or other materials provided with the distribution.
3. Neither the name of the author nor the names of his contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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-}
{-# LANGUAGE FlexibleInstances #-}
module Network.Protocol.Http.Printer where

import Network.Protocol.Http.Data
import Network.Protocol.Http.Status

-- instance Show (Http Request) where
--   showsPrec _ r@(Http Request {} _ hs) =
--     showRequestLine r . shows hs . eol

printRequest :: Http Request -> String
printRequest r@(Http Request {} _ hs) = (showRequestLine r . showHeaders hs . eol) ""

-- instance Show (Http Response) where
--   showsPrec _ r@(Http Response {} _ hs) =
--     showResponseLine r . shows hs . eol

printResponse :: Http Response -> String
printResponse r@(Http Response {} _ hs) = (showResponseLine r . showHeaders hs . eol) ""

-- | Show HTTP request status line.

showRequestLine :: Http Request -> String -> String
showRequestLine (Http (Request m u) v _) =
    shows m . ss " " . ss u . ss " "
  . showVersion v . eol

-- | Show HTTP response status line.

showResponseLine :: Http Response -> String -> String
showResponseLine (Http (Response s) v _) =
    showVersion v . ss " "
  . shows (codeFromStatus s)
  . ss " " . shows s . eol

showHeaders :: Headers -> ShowS
showHeaders =
      foldr (\a b -> a . eol . b) id
    . map (\(k, a) -> ss k . ss ": " . ss a)
    . unHeaders

-- instance Show Headers where
--   showsPrec _ =
--       foldr (\a b -> a . eol . b) id
--     . map (\(k, a) -> ss k . ss ": " . ss a)
--     . unHeaders

showVersion :: Version -> ShowS
showVersion (Version a b) = ss "HTTP/" . shows a . ss "." . shows b

-- instance Show Version where
--   showsPrec _ (Version a b) = ss "HTTP/" . shows a . ss "." . shows b

eol :: ShowS
eol = ss "\r\n"

ss :: String -> ShowS
ss = showString