code.delx.au - offlineimap/blob - src/Network/IMAP/Parser.hs

   1 {- offlineimap component
   2 Copyright (C) 2008 John Goerzen <jgoerzen@complete.org>
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 -}
  18
  19 module Network.IMAP.Parser where
  20 import Text.ParserCombinators.Parsec
  21 import Network.IMAP.Types
  22 import Text.Regex.Posix
  23 import Data.Int
  24
  25 {- | Read a full response from the server. -}
  26 {-
  27 readFullResponse :: Monad m =>
  28     IMAPConnection m ->         -- ^ The connection to the server
  29     IMAPString ->               -- ^ The tag that we are awaiting
  30     m IMAPString
  31 readFullResponse conn expectedtag =
  32     accumLines []
  33     where accumLines accum =
  34               do line <- getFullLine []
  35 -}
  36
  37 {- | Read a full line from the server, handling any continuation stuff.
  38
  39 If a {x}\r\n occurs, then that string (including the \r\n) will occur
  40 literally in the result, followed by the literal read, and the rest of the
  41 data.
  42  -}
  43
  44 getFullLine :: Monad m =>
  45                IMAPString ->    -- ^ The accumulator (empty for first call)
  46                IMAPConnection m -> -- ^ IMAP connection
  47                m IMAPString        -- ^ Result
  48
  49 getFullLine accum conn =
  50     do input <- readLine conn
  51        case checkContinuation input of
  52          Nothing -> return (accum ++ input)
  53          Just (size) ->
  54              do literal <- readBytes conn size
  55                 getFullLine (accum ++ input ++ "\r\n" ++ literal) conn
  56     where checkContinuation :: String -> Maybe Int64
  57           checkContinuation i =
  58               case i =~ "\\{([0-9]+)\\}$" :: (String, String, String, [String]) of
  59                 (_, _, _, [x]) -> Just (read x)
  60                 _ -> Nothing