diff --git a/BSD3 b/BSD3 new file mode 100644 --- /dev/null +++ b/BSD3 @@ -0,0 +1,26 @@ +Copyright (c) Ian Lynagh. +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions +are met: +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. +2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. +3. The names of the author may not 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 REGENTS OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +SUCH DAMAGE. diff --git a/COPYING b/COPYING new file mode 100644 --- /dev/null +++ b/COPYING @@ -0,0 +1,6 @@ + +Copyright (c) Ian Lynagh, 2005, 2007. + +This package can be used under either the GPL v2, as in ./GPL-2, or the +3-clause BSD, as in ./BSD3, license. + diff --git a/Codec/Binary/EncodingQ/String.hs b/Codec/Binary/EncodingQ/String.hs new file mode 100644 --- /dev/null +++ b/Codec/Binary/EncodingQ/String.hs @@ -0,0 +1,49 @@ + +-- XXX Write tests + +-- Defined in RFC 2047 +-- We assume we have US-ASCII characters. + +module Codec.Binary.EncodingQ.String ( encode, decode) where + +import Codec.MIME.String.Internal.Utils +import Data.Bits +import Data.Char + +-- len is the maximum length the encoded text in a single block is +-- allowed to be +encode :: Int -> String -> [String] +encode _ "" = [] +encode len xs = enc len 0 id id xs + +-- The Int is the number of characters on this line so far +-- 76 is the maximum we can have no one line, and 3 is the most +-- generated for 1 input char (but we also need space for a trailing +-- '=' for a soft line break). + +enc :: Int -> Int -- Length stuff + -> ([String] -> [String]) -> (String -> String) -- accumulators + -> String -- input + -> [String] +enc _ _ acc_list acc_string "" = acc_list [acc_string ""] +enc len so_far acc_list acc_string (c:cs) + = if so_far' > len + then enc len new_len (acc_list . (acc_string "" :)) id cs + else enc len new_len acc_list (acc_string . (encoded ++)) cs + where encoded = if isAsciiPrint c && (c /= ' ') && (c /= '?') + then [c] + else ['=', x1, x2] + new_len = length encoded + so_far' = so_far + new_len + o = ord c + x1 = toUpper $ intToDigit (o `shiftR` 4) + x2 = toUpper $ intToDigit (o .&. 0xF) + +decode :: String -> String +decode ('=':c1:c2:cs) + | isAsciiHexDigit c1 && isAsciiHexDigit c2 + = chr ((digitToInt c1 `shiftL` 4) + digitToInt c2):decode cs +decode ('_':cs) = ' ':decode cs +decode (c:cs) = c:decode cs +decode "" = "" + diff --git a/Codec/MIME/String.hs b/Codec/MIME/String.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String.hs @@ -0,0 +1,21 @@ + +module Codec.MIME.String ( + module Codec.MIME.String.ContentDisposition, + module Codec.MIME.String.Date, + module Codec.MIME.String.EncodedWord, + module Codec.MIME.String.Flatten, + module Codec.MIME.String.Headers, + module Codec.MIME.String.Parse, + module Codec.MIME.String.QuotedPrintable, + module Codec.MIME.String.Types, + ) where + +import Codec.MIME.String.ContentDisposition +import Codec.MIME.String.Date +import Codec.MIME.String.EncodedWord +import Codec.MIME.String.Flatten +import Codec.MIME.String.Headers +import Codec.MIME.String.Parse +import Codec.MIME.String.QuotedPrintable +import Codec.MIME.String.Types + diff --git a/Codec/MIME/String/ContentDisposition.hs b/Codec/MIME/String/ContentDisposition.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/ContentDisposition.hs @@ -0,0 +1,115 @@ + +-- We assume we have US-ASCII characters + +module Codec.MIME.String.ContentDisposition + ( + ContentDisposition(ContentDisposition), + DispositionType(Inline, Attachment), + DispositionParameter(..), + get_content_disposition, + ) where + +import Codec.MIME.String.Internal.Utils +import Codec.MIME.String.Internal.ABNF + ( + Parser, parse, nested_parse, + (<$>), (<$), (<*>), (<*), (<|>), + pEOI, pPred, pChar, pMany, pAtLeast, + ) +import Codec.MIME.String.Date (FullDate, p_date_time) +import Codec.MIME.String.Headers + ( + Parameter, p_parameter, + cws, p_ci_string, p_extension_token, p_value, p_quoted_string, + ) + +data ContentDisposition = ContentDisposition DispositionType + [DispositionParameter] + deriving (Show, Read) + +data DispositionType = Inline | Attachment + deriving (Show, Read) + +data DispositionParameter = Filename String + | CreationDate FullDate + | ModificationDate FullDate + | ReadDate FullDate + | Size Integer + | DispositionParameter Parameter + deriving (Show, Read) + +get_content_disposition :: String -> Maybe ContentDisposition +get_content_disposition xs + = case parse ph_content_disposition xs of + Left cd -> Just cd + Right _ -> Nothing + +ph_content_disposition :: Parser Char ContentDisposition +ph_content_disposition = ContentDisposition + <$ cws + <*> p_disposition_type + <*> pMany ( id + <$ cws + <* pChar ';' + <* cws + <*> p_disposition_parm) + <* cws + <* pEOI + +p_disposition_type :: Parser Char DispositionType +p_disposition_type = Inline <$ p_ci_string "inline" + <|> Attachment <$ p_ci_string "attachment" + <|> Attachment <$ p_extension_token + +p_disposition_parm :: Parser Char DispositionParameter +p_disposition_parm = p_filename_parm + <|> p_creation_date_parm + <|> p_modification_date_parm + <|> p_read_date_parm + <|> p_size_parm + <|> DispositionParameter <$> p_parameter + +p_filename_parm :: Parser Char DispositionParameter +p_filename_parm = Filename + <$ p_ci_string "filename" + <* cws + <* pChar '=' + <* cws + <*> p_value + +p_creation_date_parm :: Parser Char DispositionParameter +p_creation_date_parm = CreationDate + <$ p_ci_string "creation-date" + <* cws + <* pChar '=' + <* cws + <*> p_quoted_date_time + +p_modification_date_parm :: Parser Char DispositionParameter +p_modification_date_parm = ModificationDate + <$ p_ci_string "modification-date" + <* cws + <* pChar '=' + <* cws + <*> p_quoted_date_time + +p_read_date_parm :: Parser Char DispositionParameter +p_read_date_parm = ReadDate + <$ p_ci_string "read-date" + <* cws + <* pChar '=' + <* cws + <*> p_quoted_date_time + +p_size_parm :: Parser Char DispositionParameter +p_size_parm = (Size . read) + <$ p_ci_string "size" + <* cws + <* pChar '=' + <* cws + <*> pAtLeast 1 (pPred isAsciiDigit) + +p_quoted_date_time :: Parser Char FullDate +p_quoted_date_time = nested_parse p_quoted_string + (id <$> p_date_time <* pEOI) + diff --git a/Codec/MIME/String/Date.hs b/Codec/MIME/String/Date.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/Date.hs @@ -0,0 +1,241 @@ + +module Codec.MIME.String.Date + (FullDate(FullDate), DOW(..), Date(Date), Day, Month(..), Year, + Time(Time), Zone, TimeOfDay(TimeOfDay), Hour, Minute, Second, + show_full_date, show_mbox_full_date, get_date, p_date_time, + get_current_date, epochDate, + ) + where + +import Codec.MIME.String.Internal.ABNF + ( + Parser, parse, + (<$>), (<$), (<*>), (<*), (<|>), + pEOI, pPred, pChar, pAtLeast, pFromTo, pExactly, pMaybe, + ) +import Codec.MIME.String.Headers (cws, p_ci_string) +import Codec.MIME.String.Internal.Utils + +import Control.Monad.Trans (MonadIO, liftIO) +import System.Time hiding (Month(May), Day) +import qualified System.Time as Time (Month(May)) + +data FullDate = FullDate (Maybe DOW) Date Time + deriving (Show, Read) + +data DOW = Mon | Tue | Wed | Thu | Fri | Sat | Sun + deriving (Show, Read) + +data Date = Date Day Month Year + deriving (Show, Read) +type Day = Int +data Month = Jan | Feb | Mar | Apr | May | Jun + | Jul | Aug | Sep | Oct | Nov | Dec + deriving (Show, Read) +type Year = Int + +data Time = Time TimeOfDay Zone + deriving (Show, Read) +type Zone = Int +data TimeOfDay = TimeOfDay Hour Minute (Maybe Second) + deriving (Show, Read) +type Hour = Int +type Minute = Int +type Second = Int + +epochDate :: FullDate +epochDate = FullDate (Just Thu) (Date 01 Jan 1970) + (Time (TimeOfDay 0 0 (Just 0)) 0) + +------------------------ Showing + +show_full_date :: FullDate -> String +show_full_date (FullDate m_dow date time) + = shown_dow ++ show_date date ++ " " ++ show_time time + where shown_dow = case m_dow of + Nothing -> "" + Just dow -> show dow ++ ", " + +show_date :: Date -> String +show_date (Date day month year) + = show_int 2 day ++ " " ++ show month ++ " " ++ show year + +show_time :: Time -> String +show_time (Time tod zone) = show_tod tod ++ " " ++ show_zone zone + +show_tod :: TimeOfDay -> String +show_tod (TimeOfDay h m m_s) + = show_int 2 h ++ ":" ++ show_int 2 m ++ shown_s + where shown_s = case m_s of + Nothing -> "" + Just s -> ":" ++ show_int 2 s + +show_zone :: Zone -> String +show_zone z = (if z < 0 then '-' else '+'):show_int 4 (abs z) + +show_int :: Int -> Int -> String +show_int digits int = let s = show int + in replicate (digits - length s) '0' ++ s + +-- Showing for the "From " line in mboxes is sadly a slightly different format + +show_mbox_full_date :: FullDate -> String +show_mbox_full_date (FullDate m_dow (Date day month year) (Time tod _)) + = shown_dow ++ show month ++ " " ++ show_int 2 day ++ " " ++ + show_tod tod ++ " " ++ show year + where shown_dow = case m_dow of + Nothing -> "" + Just dow -> show dow ++ " " + +------------------------ Parsing + +get_date :: String -> Maybe FullDate +get_date xs + = case parse ph_date xs of + Left f -> Just f + Right _ -> Nothing + +ph_date :: Parser Char FullDate +ph_date = id + <$ cws + <*> p_date_time + <* cws + <* pEOI + +p_date_time :: Parser Char FullDate +p_date_time = FullDate + <$> pMaybe ( id + <$> p_dow + <* cws + <* pChar ',' + <* cws) + <*> p_date + <* cws + <*> p_time + +p_dow :: Parser Char DOW +p_dow = Mon <$ p_ci_string "Mon" + <|> Tue <$ p_ci_string "Tue" + <|> Wed <$ p_ci_string "Wed" + <|> Thu <$ p_ci_string "Thu" + <|> Fri <$ p_ci_string "Fri" + <|> Sat <$ p_ci_string "Sat" + <|> Sun <$ p_ci_string "Sun" + +p_date :: Parser Char Date +p_date = Date + <$> p_day + <* cws + <*> p_month + <* cws + <*> p_year + +-- obs-year merged in +p_year :: Parser Char Year +p_year = (\ds -> let y = read ds + in case ds of + [_, _, _] -> 2000 + y + [_, _] + | y < 50 -> 1900 + y + | otherwise -> 2000 + y + _ -> y) + <$> pAtLeast 2 (pPred isAsciiDigit) + +p_month :: Parser Char Month +p_month = Jan <$ p_ci_string "Jan" + <|> Feb <$ p_ci_string "Feb" + <|> Mar <$ p_ci_string "Mar" + <|> Apr <$ p_ci_string "Apr" + <|> May <$ p_ci_string "May" + <|> Jun <$ p_ci_string "Jun" + <|> Jul <$ p_ci_string "Jul" + <|> Aug <$ p_ci_string "Aug" + <|> Sep <$ p_ci_string "Sep" + <|> Oct <$ p_ci_string "Oct" + <|> Nov <$ p_ci_string "Nov" + <|> Dec <$ p_ci_string "Dec" + +p_day :: Parser Char Day +p_day = read <$> pFromTo 1 2 (pPred isAsciiDigit) + +p_time :: Parser Char Time +p_time = Time + <$> p_time_of_day + <* cws + <*> p_zone + +p_time_of_day :: Parser Char TimeOfDay +p_time_of_day = TimeOfDay + <$> p_hour + <* cws + <* pChar ':' + <* cws + <*> p_minute + <*> pMaybe ( id + <$ cws + <* pChar ':' + <* cws + <*> p_second) + +p_hour :: Parser Char Hour +p_hour = read <$> pExactly 2 (pPred isAsciiDigit) + +p_minute :: Parser Char Minute +p_minute = read <$> pExactly 2 (pPred isAsciiDigit) + +p_second :: Parser Char Second +p_second = read <$> pExactly 2 (pPred isAsciiDigit) + +p_zone :: Parser Char Zone +p_zone = (\f n -> f $ read n) + <$> (id <$ pChar '+' <|> negate <$ pChar '-') + <*> pExactly 4 (pPred isAsciiDigit) + <|> p_obs_zone + +p_obs_zone :: Parser Char Zone +p_obs_zone = 0 <$ p_ci_string "UT" + <|> 0 <$ p_ci_string "GMT" + <|> -500 <$ p_ci_string "EST" + <|> -400 <$ p_ci_string "EDT" + <|> -600 <$ p_ci_string "CST" + <|> -500 <$ p_ci_string "CDT" + <|> -700 <$ p_ci_string "MST" + <|> -600 <$ p_ci_string "MDT" + <|> -800 <$ p_ci_string "PST" + <|> -700 <$ p_ci_string "PDT" + -- Military time zones. Strictly we shouldn't accept [jJ] + -- but no harm done. + -- 'they SHOULD all be considered equivalent to "-0000"' as + -- RFC 822 defined them incorrectly. + <|> 0 <$ pPred isAsciiAlpha + +get_current_date :: MonadIO m => m FullDate +get_current_date + = do clt <- liftIO getClockTime + cat <- liftIO $ toCalendarTime clt + let fd = FullDate (Just dow) date time + get_dow Sunday = Sun + get_dow Monday = Mon + get_dow Tuesday = Tue + get_dow Wednesday = Wed + get_dow Thursday = Thu + get_dow Friday = Fri + get_dow Saturday = Sat + get_month January = Jan + get_month February = Feb + get_month March = Mar + get_month April = Apr + get_month Time.May = May + get_month June = Jun + get_month July = Jul + get_month August = Aug + get_month September = Sep + get_month October = Oct + get_month November = Nov + get_month December = Dec + dow = get_dow (ctWDay cat) + date = Date (ctDay cat) (get_month (ctMonth cat)) (ctYear cat) + time = Time tod (ctTZ cat `div` 36) + tod = TimeOfDay (ctHour cat) (ctMin cat) (Just (ctSec cat)) + return fd + diff --git a/Codec/MIME/String/EncodedWord.hs b/Codec/MIME/String/EncodedWord.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/EncodedWord.hs @@ -0,0 +1,8 @@ + +module Codec.MIME.String.EncodedWord (base64_encode) where + +import Codec.Binary.Base64.String (encode) + +base64_encode :: String -> String -> String +base64_encode charset xs = "=?" ++ charset ++ "?B?" ++ encode xs ++ "?=" + diff --git a/Codec/MIME/String/Flatten.hs b/Codec/MIME/String/Flatten.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/Flatten.hs @@ -0,0 +1,111 @@ + +module Codec.MIME.String.Flatten (flatten) where + +import qualified Codec.Binary.Base64.String as Base64 (encode) +import Codec.MIME.String.Date (FullDate, show_full_date, show_mbox_full_date) +import Codec.MIME.String.EncodedWord (base64_encode) +import qualified Codec.MIME.String.QuotedPrintable as QP (encode) +import Codec.MIME.String.Internal.Utils + +import Data.List (intersperse) +import Network.BSD (getHostName) +import System.Locale (defaultTimeLocale) +import System.Random (randomIO) +import System.Time (getClockTime, toCalendarTime, formatCalendarTime) + +-- XXX This should take a headers structure +-- Flatten {meta info, message body and list of attachments} to a raw message +flatten :: String -> String -> String -> FullDate + -> String -> [(String, FilePath)] + -> IO String +flatten from_name from_email subject date body attachments + = do msgid <- mk_msgid + let -- XXX This (\n) could be prettier - check llengths of bits + from_full = encode_name from_name ++ "\n <" ++ from_email ++ ">" + boundary = "=:" + part_start = "\n--" ++ boundary ++ "\n" + parts_end = "\n--" ++ boundary ++ "--\n" + text_content = unlines [ + "Content-type: text/plain; charset=utf-8", + "Content-transfer-encoding: quoted-printable", + "Content-Disposition: inline"] + common_headers = unlines [ + "From " ++ from_email ++ " " ++ show_mbox_full_date date, + "Date: " ++ show_full_date date, + "Message-ID: " ++ msgid, + "From: " ++ from_full, + "Subject: " ++ mk_subject subject, + "MIME-Version: 1.0"] + -- This is overly paranoid + safe_char c = isAsciiAlphaNum c || (c `elem` " .-_") + mime_attachment (a, fn) + = part_start + -- XXX Can we give a better MIME type than this? + ++ "Content-type: application/octet-stream\n" + ++ "Content-transfer-encoding: base64\n" + ++ "Content-Disposition: attachment; filename=\"" + ++ (case reverse $ filter safe_char + $ takeWhile ('/' /=) + $ reverse fn of + [] -> "unknown" + fn' -> fn') + ++ "\"\n" + ++ "\n" + ++ Base64.encode a + msg = if single_part + then common_headers + ++ text_content + ++ "\n" + ++ QP.encode (my_lines body) + else common_headers + ++ "Content-type: multipart/mixed; boundary=\"" + ++ boundary ++ "\"\n" + ++ "\n" + ++ "This is a multi-part message in MIME format.\n" + ++ part_start + ++ text_content + ++ "\n" + ++ QP.encode (my_lines body) + ++ concatMap mime_attachment attachments + ++ parts_end + return msg + where single_part = null attachments + +-- XXX The IO calls used to use liftIOErr. We could use something similar +-- but require we are called in a MonadError m? +-- XXX We should possibly be including a program name +mk_msgid :: IO String +mk_msgid + = do hostname <- getHostName + clock_time <- getClockTime + calendar_time <- toCalendarTime clock_time + r <- randomIO + let timestamp = formatCalendarTime defaultTimeLocale + "%Y%m%d%H%M%S" calendar_time + lhs = concat $ intersperse "." + [timestamp, show (r :: Int)] + return (lhs ++ "@" ++ hostname) + +mk_subject :: String -> String +mk_subject subject + = if can_send_clear subject && + length_at_most (76 - length "Subject: ") subject + then subject + else encode_string (length "Subject: ") subject + +can_send_clear :: String -> Bool +can_send_clear = all isAsciiPrint + +length_at_most :: Int -> [a] -> Bool +length_at_most _ [] = True +length_at_most 0 _ = False +length_at_most i (_:xs) = length_at_most (i-1) xs + +encode_name :: String -> String +encode_name rn = encode_string (length "From: ") rn + +encode_string :: Int -> String -> String +encode_string n s + = concat $ intersperse "\n " $ map (base64_encode "utf-8") (splits n' s) + where n' = ((76 - n - length "=?utf-8?B??=") * 3) `div` 4 + diff --git a/Codec/MIME/String/Headers.hs b/Codec/MIME/String/Headers.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/Headers.hs @@ -0,0 +1,635 @@ + +-- We assume we have US-ASCII characters + +module Codec.MIME.String.Headers + ( + Domain(Domain, LiteralDomain), + Mailbox(Mailbox), + RoutedEmailAddress(RoutedEmailAddress, NormalEmailAddress), + EmailAddress(EmailAddress), get_addr_spec, + Address(Address, Group), + ContentType(ContentType), get_content_type, + ContentDescription(ContentDescription), + get_content_description, + ContentTransferEncoding(ContentTransferEncoding), + get_content_transfer_encoding, + ContentID(ContentID), get_content_id, + MessageID(MessageID), + MIMEVersion(MIMEVersion), get_mime_version, + Parameter(Parameter), p_parameter, + From(From), To(To), Subject(Subject), + get_from, get_to, get_subject, + get_boundary, p_extension_token, p_value, p_quoted_string, + cws, p_ci_string, + ) + where + +import Text.Iconv +import Codec.MIME.String.Internal.ABNF + ( + Parser, parse, pSucceed, pFail, + (<$>), (<$), (<*>), (<*), (<|>), (<|), (), + pEOI, pPred, pChar, pMany, pAtLeast, pMaybe, pOptDef, pString, + ) +import qualified Codec.Binary.Base64.String as Base64 (decode) +import qualified Codec.Binary.EncodingQ.String as EncodingQ (decode) +import Codec.MIME.String.Internal.Utils + +import Data.Char +import Data.List + +----------------------- +-- Utils + +ignore :: Parser inp a -> Parser inp () +ignore p = () <$ p + +boxp :: Parser inp a -> Parser inp [a] +boxp p = box <$> p + +----------------------- +-- RFC 2234 + +p_CTL :: Parser Char Char +p_CTL = pPred (\c -> ord c < 32 || ord c == 127) + +p_SP :: Parser Char Char +p_SP = pChar ' ' + +p_HTAB :: Parser Char Char +p_HTAB = pChar '\t' + +p_WSP :: Parser Char Char +p_WSP = p_SP <|> p_HTAB + +----------------------- +-- RFC 2822 + +-- Case insensitive strings, written "Foo" +p_ci_string :: String -> Parser Char String +p_ci_string s = s <$ f s + where f "" = pSucceed () + f (c:cs) = let p = if isAsciiAlpha c + then pChar (toLower c) <| pChar (toUpper c) + else pChar c + in () <$ p <* f cs + +p_NO_WS_CTL :: Parser Char Char +p_NO_WS_CTL = pPred (\c -> let o = ord c in 1 <= o && o <= 8 + || o == 11 + || o == 12 + || 14 <= o && o <= 31 + || o == 127) + +-- If we follow the spec precisely then we get pMany (pMany), and hence +-- non-termination, so we merge the definition of p_obs_text in. +p_text :: Parser Char String +p_text = concat + <$> pMany ( + p_encoded_words + <| boxp (pPred (\c -> let o = ord c in 0 <= o && o <= 9 + || o == 11 + || o == 12 + || 14 <= o && o <= 127)) + ) + +-- We are lax about checking they have any necessary surrounding +-- whitespace +p_encoded_words :: Parser Char String +p_encoded_words = (\x xs -> x ++ concat xs) + <$> p_encoded_word + <*> pMany (id <$ cws <*> p_encoded_word) + +p_encoded_word :: Parser Char String +p_encoded_word = (\cs dec text -> case convert Fuzzy cs "utf8" (dec text) of + ConversionSuccess xs -> xs + ConversionFailed -> error "p_encoded_word: Can't happen XXX" + ConversionUnsupported -> error "p_encoded_word: Unknown charset XXX") + <$ pString "=?" + <*> p_charset + <* pChar '?' + <*> p_encoding + <* pChar '?' + <*> p_encoded_text + <* pString "?=" + +-- token definition inlined as they use a different one to p_token. +p_charset :: Parser Char String +p_charset = pAtLeast 1 (pPred isAscii (p_SP <|> p_CTL <|> p_especials)) + +p_especials :: Parser Char Char +p_especials = pPred (`elem` "()<>@,;:\\\"/[]?.=") + +-- This is much stricter than specified, but if it's not [qQbB] then +-- we'd want to fall back to showing it as a string anyway. +p_encoding :: Parser Char (String -> String) +p_encoding = EncodingQ.decode <$ (pChar 'Q' <|> pChar 'q') + <|> Base64.decode <$ (pChar 'B' <|> pChar 'b') + +p_encoded_text :: Parser Char String +p_encoded_text = pMany (pPred (\c -> isAsciiPrint c && c /= '?' && c /= ' ')) + +p_quoted_pair :: Parser Char String +p_quoted_pair = id <$ pChar '\\' <*> p_text <|> (boxp p_obs_qp) + +p_obs_qp :: Parser Char Char +p_obs_qp = id <$ pChar '\\' <*> pPred isAscii + +-- Done differently as the newlines are already gone +p_FWS :: Parser Char String +p_FWS = pMany p_WSP + +p_ctext :: Parser Char Char +p_ctext = p_NO_WS_CTL + <|> pPred (\c -> let o = ord c in 33 <= o && o <= 39 + || 42 <= o && o <= 91 + || 93 <= o && o <= 126) + +p_ccontent :: Parser Char () +p_ccontent = ignore p_ctext <|> ignore p_quoted_pair <|> p_comment + +p_comment :: Parser Char () +p_comment = () + <$ pChar '(' + <* pMany (() <$ pMany p_NO_WS_CTL <* p_ccontent) + <* pMany p_NO_WS_CTL + <* pChar ')' + +-- We might want to keep the result. If we do then we also need to +-- handle encoded words properly. +-- This isn't quite CFWS as we need to be able to accept "1.0" +-- as a MIME version with cws between all the characters. +-- Also, we've already removed all the newlines in the headers. +cws :: Parser Char () +cws = ignore $ pMany (ignore (pAtLeast 1 p_WSP) <|> p_comment) + +p_qtext :: Parser Char Char +p_qtext = p_NO_WS_CTL + <|> pPred (\c -> let o = ord c in o == 33 + || 35 <= o && o <= 91 + || 93 <= o && o <= 126) + +p_qcontent :: Parser Char String +p_qcontent = boxp p_qtext + <|> p_quoted_pair + +p_quoted_string :: Parser Char String +p_quoted_string = (++) + <$ cws + <* pChar '"' + <*> (concat <$> pMany ((++) <$> pOptDef "" p_FWS <*> p_qcontent)) + <*> pOptDef "" p_FWS + <* pChar '"' + +p_dcontent :: Parser Char String +p_dcontent = boxp p_dtext <|> p_quoted_pair + +p_dtext :: Parser Char Char +p_dtext = p_NO_WS_CTL + <|> pPred (\c -> let o = ord c in 33 <= o && o <= 90 + || 94 <= o && o <= 126) + +data MessageID = MessageID String Domain + deriving (Show, Read) + +p_msg_id :: Parser Char MessageID +p_msg_id = MessageID + <$ cws + <* pChar '<' + <*> p_id_left + <* pChar '@' + <*> p_id_right + <* pChar '>' + <* cws + +p_atom :: Parser Char String +p_atom = id + <$ cws + <*> pAtLeast 1 p_atext + <* cws + +p_atext :: Parser Char Char +p_atext = pPred (\c -> isAsciiAlphaNum c || c `elem` "!#$%&'+-/=?^_`{|}~") + +p_dot_atom :: Parser Char String +p_dot_atom = id + <$ cws + <*> p_dot_atom_text + <* cws + +p_word :: Parser Char String +p_word = p_atom <|> p_quoted_string + +-- This incorporates obs-phrase +p_phrase :: Parser Char [String] +p_phrase = (:) + <$> (p_encoded_words <| p_word) + <*> pMany (id <$ cws <*> (p_encoded_words <| p_word <| pString ".")) + <|> boxp p_quoted_string + +p_dot_atom_text :: Parser Char String +p_dot_atom_text = (\x xs -> x ++ concat xs) + <$> pAtLeast 1 p_atext + <*> pMany ((:) <$> pChar '.' <*> pAtLeast 1 p_atext) + +p_id_left :: Parser Char String +p_id_left = p_dot_atom_text <|> p_no_fold_quote <|> p_obs_id_left + +p_id_right :: Parser Char Domain +p_id_right = Domain <$> p_dot_atom_text + <|> p_no_fold_literal + <|> p_obs_id_right + +p_obs_id_left :: Parser Char String +p_obs_id_left = p_local_part + +p_local_part :: Parser Char String +p_local_part = p_dot_atom <|> p_quoted_string <|> p_obs_local_part + +p_obs_local_part :: Parser Char String +p_obs_local_part = (\x xs -> x ++ concat xs) + <$> p_word + <*> pMany ((:) <$> pChar '.' <*> p_word) + +p_domain :: Parser Char Domain +p_domain = Domain <$> p_dot_atom <|> p_domain_literal <|> p_obs_domain + +p_domain_literal :: Parser Char Domain +p_domain_literal = (LiteralDomain . concat) + <$ cws + <* pChar '[' + <*> pMany ( id + <$ p_FWS + <*> p_dcontent) + <* p_FWS + <* pChar ']' + <* cws + +p_obs_domain :: Parser Char Domain +p_obs_domain = (\x xs -> Domain (x ++ concat xs)) + <$> p_atom + <*> pMany ((:) <$> pChar '.' <*> p_atom) + +p_obs_id_right :: Parser Char Domain +p_obs_id_right = p_domain + +p_no_fold_quote :: Parser Char String +p_no_fold_quote = concat + <$ pChar '"' + <*> pMany (boxp p_qtext <|> p_quoted_pair) + <* pChar '"' + +data Domain = Domain String | LiteralDomain String + deriving (Show, Read, Eq) + +p_no_fold_literal :: Parser Char Domain +p_no_fold_literal = LiteralDomain . concat + <$ pChar '[' + <*> pMany (boxp p_dtext <|> p_quoted_pair) + <* pChar ']' + +data Subject = Subject String + deriving (Show, Read) + +get_subject :: String -> Maybe Subject +get_subject xs + = case parse ph_subject xs of + Left cd -> Just cd + Right _ -> Nothing + +-- This is actually the RFC822 definition, as otherwise things get very +-- confusing. +-- Would be pMany, but p_text already does that for us +ph_subject :: Parser Char Subject +ph_subject = Subject <$> p_text <* pEOI + +data From = From [Mailbox] + deriving (Show, Read, Eq) + +get_from :: String -> Maybe From +get_from xs + = case parse ph_from xs of + Left f -> Just f + Right _ -> Nothing + +ph_from :: Parser Char From +ph_from = From <$ cws <*> p_mailbox_list <* cws <* pEOI + +data To = To [Address] + deriving (Show, Read) + +data Address = Address Mailbox + | Group String [Mailbox] + deriving (Show, Read) + +get_to :: String -> Maybe To +get_to xs + = case parse ph_to xs of + Left t -> Just t + Right _ -> Nothing + +ph_to :: Parser Char To +ph_to = To <$ cws <*> p_address_list <* cws <* pEOI + +-- obs-addr-list merged in +p_address_list :: Parser Char [Address] +p_address_list = (:) + <$ pMany (() <$ pChar ',' <* cws) + <*> p_address + <*> pMany ( id + <$ pAtLeast 1 (() <$ cws <* pChar ',') + <* cws + <*> p_address) + <* pMany (() <$ cws <* pChar ',') + +p_address :: Parser Char Address +p_address = Address <$> p_mailbox + <|> p_group + +p_group :: Parser Char Address +p_group = Group + <$> p_display_name + <* cws + <* pChar ':' + <* cws + <*> pOptDef [] p_mailbox_list + <* cws + <* pChar ';' + +-- obs-mbox-list merged in +p_mailbox_list :: Parser Char [Mailbox] +p_mailbox_list = (:) + <$ pMany (() <$ pChar ',' <* cws) + <*> p_mailbox + <*> pMany ( id + <$ pAtLeast 1 (() <$ cws <* pChar ',') + <* cws + <*> p_mailbox) + <* pMany (() <$ cws <* pChar ',') + +data Mailbox = Mailbox (Maybe String) RoutedEmailAddress + deriving (Show, Read, Eq) + +p_mailbox :: Parser Char Mailbox +p_mailbox = p_name_addr + <|> (Mailbox Nothing . NormalEmailAddress) <$> p_addr_spec + +p_name_addr :: Parser Char Mailbox +p_name_addr = Mailbox + <$> pMaybe p_display_name + <* cws + <*> p_angle_addr + +data EmailAddress = EmailAddress String Domain + deriving (Show, Read, Eq) + +data RoutedEmailAddress = NormalEmailAddress EmailAddress + | RoutedEmailAddress [Domain] EmailAddress + deriving (Show, Read, Eq) + +p_angle_addr :: Parser Char RoutedEmailAddress +p_angle_addr = ($) + <$ pChar '<' + <* cws + -- This next makes us also satisfy obs-angle-addr + <*> pOptDef NormalEmailAddress + (RoutedEmailAddress <$> p_obs_route <* cws) + <*> p_addr_spec + <* cws + <* pChar '>' + +get_addr_spec :: String -> Maybe EmailAddress +get_addr_spec xs + = case parse p_addr_spec xs of + Left e -> Just e + Right _ -> Nothing + +p_addr_spec :: Parser Char EmailAddress +p_addr_spec = EmailAddress + <$> p_local_part + <* cws + <* pChar '@' + <* cws + <*> p_domain + +p_display_name :: Parser Char String +p_display_name = (concat . intersperse " ") <$> p_phrase + +p_obs_route :: Parser Char [Domain] +p_obs_route = id <$> p_obs_domain_list <* pChar ':' + +p_obs_domain_list :: Parser Char [Domain] +p_obs_domain_list = (:) + <$ pChar '@' + <* cws + <*> p_domain + <*> pMany ( id + <$ pMaybe (() <$ cws <* pChar ',') + <* cws + <* pChar '@' + <* cws + <*> p_domain) + +----------------------- +-- RFC 2045 + +data MIMEVersion = MIMEVersion Integer Integer + deriving (Show, Read) + +get_mime_version :: String -> Maybe MIMEVersion +get_mime_version xs = case parse ph_mime_version xs of + Left ct -> Just ct + Right _ -> Nothing + +ph_mime_version :: Parser Char MIMEVersion +ph_mime_version = MIMEVersion + <$ cws + <*> (read <$> pMany (pPred isAsciiDigit)) + <* cws + <* pChar '.' + <* cws + <*> (read <$> pMany (pPred isAsciiDigit)) + <* cws + <* pEOI + +data ContentType = ContentType String -- Case insensitive: lower-cased + String -- Case insensitive: lower-cased + [Parameter] + deriving (Show, Read) +data Parameter = Parameter String -- Case insensitive: lower-cased + String + deriving (Show, Read) + +get_content_type :: String -> Maybe ContentType +get_content_type xs = case parse ph_content_type xs of + Left ct -> Just ct + Right _ -> Nothing + +ph_content_type :: Parser Char ContentType +ph_content_type = ContentType + <$ cws + <*> p_type + <* cws + <* pChar '/' + <* cws + <*> p_subtype + <*> pMany (id + <$ cws + <* pChar ';' + <* cws + <*> p_parameter) + <* cws + <* pEOI + + +-- For type and subtypes, allow anything that matches a regexp that +-- subsumes the currently allowed values +p_type :: Parser Char String +p_type = pAtLeast 1 (pPred (\c -> isAsciiAlphaNum c || c `elem` "-.+")) + +p_subtype :: Parser Char String +p_subtype = pAtLeast 1 (pPred (\c -> isAsciiAlphaNum c || c `elem` "-.+")) + +{- +p_type :: Parser Char String +p_type = p_discrete_type <|> p_composite_type + +p_subtype :: Parser Char String +p_subtype = map asciiToLower <$> (p_extension_token <|> p_iana_token) + +p_discrete_type :: Parser Char String +p_discrete_type = p_ci_string "text" + <|> p_ci_string "image" + <|> p_ci_string "audio" + <|> p_ci_string "video" + <|> p_ci_string "application" + <|> map asciiToLower <$> p_extension_token + +p_composite_type :: Parser Char String +p_composite_type = p_ci_string "message" + <|> p_ci_string "multipart" + <|> map asciiToLower <$> p_extension_token + +p_iana_token :: Parser Char String +p_iana_token = pFail +-} + +p_extension_token :: Parser Char String +p_extension_token = p_ietf_token <|> p_x_token + +p_ietf_token :: Parser Char String +p_ietf_token = pFail + +p_x_token :: Parser Char String +p_x_token = (\x t -> x:'-':t) + <$> (pChar 'X' <|> pChar 'x') + <* pChar '-' + <*> p_token + +p_parameter :: Parser Char Parameter +p_parameter = Parameter + <$> p_attribute + <* cws + <* pChar '=' + <* cws + <*> p_value + +p_attribute :: Parser Char String +p_attribute = map asciiToLower <$> p_token + +p_value :: Parser Char String +p_value = p_token <|> p_quoted_string + +p_token :: Parser Char String +p_token = pAtLeast 1 (pPred isAscii (p_SP <|> p_CTL <|> p_tspecials)) + +p_tspecials :: Parser Char Char +p_tspecials = pPred (`elem` "()<>@,;:\\\"/[]?=") + +----- + +data ContentTransferEncoding + = ContentTransferEncoding String -- Case insensitive: lower-cased + deriving (Show, Read) + +get_content_transfer_encoding :: String -> Maybe ContentTransferEncoding +get_content_transfer_encoding xs + = case parse ph_content_transfer_encoding xs of + Left cte -> Just cte + Right _ -> Nothing + +ph_content_transfer_encoding :: Parser Char ContentTransferEncoding +ph_content_transfer_encoding + = ContentTransferEncoding + <$ cws + <*> p_mechanism + <* cws + <* pEOI + +p_mechanism :: Parser Char String +p_mechanism = p_ci_string "7bit" + <|> p_ci_string "8bit" + <|> p_ci_string "binary" + <|> p_ci_string "quoted-printable" + <|> p_ci_string "base64" + <|> map asciiToLower <$> p_ietf_token + <|> map asciiToLower <$> p_x_token + +data ContentID = ContentID MessageID + deriving (Show, Read) + +get_content_id :: String -> Maybe ContentID +get_content_id xs + = case parse ph_content_id xs of + Left ci -> Just ci + Right _ -> Nothing + +ph_content_id :: Parser Char ContentID +ph_content_id + = ContentID + <$ cws + <*> p_msg_id + <* cws + <* pEOI + +data ContentDescription = ContentDescription String + deriving (Show, Read) + +get_content_description :: String -> Maybe ContentDescription +get_content_description xs + = case parse ph_content_description xs of + Left cd -> Just cd + Right _ -> Nothing + +ph_content_description :: Parser Char ContentDescription +ph_content_description + = ContentDescription + <$ cws + <*> p_text -- would be pMany, but p_text already does that for us + <* cws + <* pEOI + +----------------------- +-- RFC 2046 + +-- Not really a header as such + +get_boundary :: String -> Maybe String +get_boundary xs + = case parse p_boundary xs of + Left b -> Just b + Right _ -> Nothing + +-- We are very flexible here +p_boundary :: Parser Char String +p_boundary = (\ss b bs -> dropFromEndWhile (' ' ==) (ss ++ [b] ++ bs)) + <$> pMany (pChar ' ') + <*> p_bchars + <*> pMany p_bchars + +p_bchars :: Parser Char Char +p_bchars = p_bcharsnospace <|> pChar ' ' + +p_bcharsnospace :: Parser Char Char +p_bcharsnospace = pPred (\c -> isAsciiAlphaNum c || c `elem` "'()+_,-./:=?") + diff --git a/Codec/MIME/String/Internal/ABNF.hs b/Codec/MIME/String/Internal/ABNF.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/Internal/ABNF.hs @@ -0,0 +1,173 @@ + +module Codec.MIME.String.Internal.ABNF + (Parser, apply, parse, + pPred, pSucceed, pFail, pEOI, (<*>), (<|>), (<| ), (), nested_parse, + pChar, pString, (<$>), (<$ ), (<* ), ( |>), + pMany, pAtLeast, pAtMost, pExactly, pFromTo, pOptDef, pMaybe + ) where + +import Data.Word + +newtype Parser inp res = Parser ([(inp, Pos)] -> ParseResult inp res) + +data ParseResult inp res = Success res [(inp, Pos)] !Pos + | Fail !Pos + +type Line = Integer +type Column = Integer +data Pos = Pos !Line !Column + | EOI + deriving (Eq, Ord) + +get_pos :: [(a, Pos)] -> Pos +get_pos [] = EOI +get_pos ((_, p):_) = p + +show_pos :: Pos -> String +show_pos EOI = "End of input" +show_pos (Pos l c) = "Line " ++ show l ++ ", column " ++ show c + +infixl 6 <$>, <$, <*>, <* +infixr 3 <|>, <|, |> + +posify :: String -> [(Char, Pos)] +posify = f 1 1 + where f _ _ [] = [] + f l c ('\n':xs) = ('\n', Pos l c):f (l+1) 1 xs + f l c (x :xs) = (x, Pos l c):f l (c+1) xs + +apply :: Parser Char a -> String -> Either (a, String) String +apply (Parser p) xs + = case p $ posify xs of + Success res ys _ -> Left (res, map fst ys) + Fail pos -> Right ("Error: Failed at " ++ show_pos pos) + +parse :: Parser Char a -> String -> Either a String +parse (Parser p) xs + = case p $ posify xs of + Success res [] _ -> Left res + Success _ ((_, pos):_) _ -> + Right ("Error: Only consumed up to " ++ show_pos pos) + Fail pos -> + Right ("Error: Failed at " ++ show_pos pos) + +-- Primitive combinators + +pPred :: (inp -> Bool) -> Parser inp inp +pPred p = Parser + $ \inp -> case inp of + ((x, pos):inp') + | p x -> Success x inp' pos + _ -> Fail (get_pos inp) + +pSucceed :: res -> Parser a res +pSucceed x = Parser $ \inp -> Success x inp (get_pos inp) + +pFail :: Parser a res +pFail = Parser $ \inp -> Fail (get_pos inp) + +pEOI :: Parser a () +pEOI = Parser $ \inp -> case inp of + [] -> Success () [] EOI + _ -> Fail (get_pos inp) + +(<*>) :: Parser inp (a -> b) -> Parser inp a -> Parser inp b +Parser p <*> Parser q = Parser $ \inp -> + case p inp of + Fail pos -> Fail pos + Success f inp' pos -> + case q inp' of + Fail pos' -> Fail (pos `max` pos') + Success x inp'' pos' -> + Success (f x) inp'' (pos `max` pos') + +(<|>) :: Parser inp a -> Parser inp a -> Parser inp a +Parser p <|> Parser q = Parser $ \inp -> + case (p inp, q inp) of + (Fail posp, Fail posq) -> Fail (posp `max` posq) + (Fail posp, Success x inp' posq) -> + Success x inp' (posp `max` posq) + (Success x inp' posp, Fail posq) -> + Success x inp' (posp `max` posq) + (rp@(Success _ _ posp), rq@(Success _ _ posq)) + -> if posp >= posq then rp else rq + +(<| ) :: Parser inp a -> Parser inp a -> Parser inp a +Parser p <| Parser q = Parser $ \inp -> + case p inp of + Fail posp -> + case q inp of + Fail posq -> Fail (posp `max` posq) + Success x inp' posq -> + Success x inp' (posp `max` posq) + s -> s + +() :: Parser inp a -> Parser inp b -> Parser inp a +Parser p Parser q = Parser $ \inp -> case q inp of + Fail _ -> + p inp + Success _ _ pos -> Fail pos + +check_fails_empty :: Parser inp a -> () +check_fails_empty (Parser p) = case p [] of + Fail _ -> () + _ -> error "check_fails_empty failed" + +nested_parse :: Parser Char String -> Parser Char a -> Parser Char a +nested_parse (Parser p1) (Parser p2) + = Parser + $ \inp -> case p1 inp of + Fail pos -> Fail pos + Success inp' rem_inp pos -> + case p2 $ posify inp' of + Fail pos' -> Fail (pos `max` pos') + Success x [] pos' -> Success x rem_inp (pos `max` pos') + Success _ _ pos' -> Fail (pos `max` pos') + +-- Derived combinators + +pChar :: Char -> Parser Char Char +pChar c = pPred (c ==) + +pString :: String -> Parser Char String +pString "" = pSucceed "" +pString (c:cs) = (:) <$> pChar c <*> pString cs + +(<$>) :: (a -> b) -> Parser inp a -> Parser inp b +x <$> q = pSucceed x <*> q + +(<$ ) :: a -> Parser inp b -> Parser inp a +x <$ q = pSucceed x <* q + +(<* ) :: Parser inp a -> Parser inp b -> Parser inp a +p <* q = (\x _ -> x) <$> p <*> q + +( |>) :: Parser inp a -> Parser inp a -> Parser inp a +p |> q = q <| p + +pMany :: Parser inp a -> Parser inp [a] +pMany p = check_fails_empty p `seq` ((:) <$> p <*> pMany p) <| pSucceed [] + +pAtLeast :: Word -> Parser inp a -> Parser inp [a] +pAtLeast 0 p = pMany p +pAtLeast n p = ((:) <$> p <*> pAtLeast (n-1) p) + +pAtMost :: Word -> Parser inp a -> Parser inp [a] +pAtMost 0 _ = pSucceed [] +pAtMost n p = ((:) <$> p <*> pAtMost (n-1) p) <| pSucceed [] + +pExactly :: Word -> Parser inp a -> Parser inp [a] +pExactly 0 _ = pSucceed [] +pExactly n p = ((:) <$> p <*> pExactly (n-1) p) + +pFromTo :: Word -> Word -> Parser inp a -> Parser inp [a] +pFromTo 0 t p = pAtMost t p +pFromTo _ 0 _ = error "Codec.MIME.String.Internal.ABNF.pFromTo: Bad arguments" +pFromTo f t p = ((:) <$> p <*> pFromTo (f-1) (t-1) p) + +pOptDef :: a -> Parser inp a -> Parser inp a +pOptDef x p = p <| pSucceed x + +pMaybe :: Parser inp a -> Parser inp (Maybe a) +pMaybe p = Just <$> p <| pSucceed Nothing + diff --git a/Codec/MIME/String/Internal/Utils.hs b/Codec/MIME/String/Internal/Utils.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/Internal/Utils.hs @@ -0,0 +1,58 @@ + +module Codec.MIME.String.Internal.Utils where + +import Data.Char + +isAsciiDigit :: Char -> Bool +isAsciiDigit c = isAscii c && isDigit c + +isAsciiHexDigit :: Char -> Bool +isAsciiHexDigit c = isAscii c && isHexDigit c + +isAsciiPrint :: Char -> Bool +isAsciiPrint c = isAscii c && isPrint c + +isAsciiAlpha :: Char -> Bool +isAsciiAlpha c = isAscii c && isAlpha c + +isAsciiAlphaNum :: Char -> Bool +isAsciiAlphaNum c = isAscii c && isAlphaNum c + +asciiToLower :: Char -> Char +asciiToLower c | isAscii c = toLower c + | otherwise = c + +asciiToUpper :: Char -> Char +asciiToUpper c | isAscii c = toUpper c + | otherwise = c + +splits :: Int -> [a] -> [[a]] +splits _ [] = [] +splits n xs = case splitAt n xs of + (ys, zs) -> ys:splits n zs + +box :: a -> [a] +box x = [x] + +dropFromEndWhile :: (a -> Bool) -> [a] -> [a] +dropFromEndWhile p = foldr (\x xs -> if null xs && p x then [] else x:xs) [] + +-- We are generous about what we allow as line terminators. Any of +-- \r \n \r\n \n\r will satisfy us. +my_lines :: String -> [String] +my_lines xs = case get_line xs of + (ys, Nothing) -> [ys] + (ys, Just zs) -> ys:my_lines zs + +get_line :: String -> (String, Maybe String) +get_line xs = case break is_cr_or_lf xs of + (ys, z1:z2:zs) + | is_cr_or_lf z2 && z1 /= z2 -> (ys, Just zs) + (ys, _:zs) -> (ys, Just zs) + (ys, "") -> (ys, Nothing) + +is_cr_or_lf :: Char -> Bool +is_cr_or_lf '\r' = True +is_cr_or_lf '\n' = True +is_cr_or_lf _ = False + diff --git a/Codec/MIME/String/Parse.hs b/Codec/MIME/String/Parse.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/Parse.hs @@ -0,0 +1,309 @@ + +module Codec.MIME.String.Parse where + +import Text.Iconv +import qualified Codec.Binary.Base64.String as Base64 (decode) +import Codec.MIME.String.ContentDisposition + ( + ContentDisposition(ContentDisposition), get_content_disposition, + DispositionType(Inline, Attachment), + DispositionParameter(..), + ) +import Codec.MIME.String.Date (get_date) +import Codec.MIME.String.Headers + ( + ContentTransferEncoding(ContentTransferEncoding), + get_content_transfer_encoding, + ContentType(ContentType), get_content_type, + get_content_description, get_boundary, + Parameter(Parameter), + MIMEVersion(MIMEVersion), get_mime_version, + Subject(Subject), + get_subject, get_from, get_to, + ) +import qualified Codec.MIME.String.QuotedPrintable as QuotedPrintable (decode) +import Codec.MIME.String.Types + ( + ParseM, + Header(Header, h_raw_header, h_raw_name, h_name, h_body), + Headers, + Message(Message), + MessageInfo(..), + Multipart(Multipart), + MessageContent(NoContent, Mixed, Alternative, + Parallel, Digest, RFC822), + mkData, mkBody, + digest_content_type, ascii_text_content_type, + ) +import Codec.MIME.String.Internal.Utils + +import Control.Monad (liftM) +import Control.Monad.State (evalState, get, put) +import Data.Maybe (fromMaybe) + +mkMessage :: MessageInfo -> ParseM MessageContent -> ParseM Message +mkMessage mi f_mc + = do pn <- get + put (pn + 1) + -- This is done slightly oddly so we get numbering in the natural + -- order, which in turn is important when looking for a part number + mc <- f_mc + return $ Message pn mi mc + +parse :: String -> Message +parse msg = evalState (parse_message msg) 1 + +parse_message :: String -> ParseM Message +parse_message msg + = let (headers, m_body) = parse_headers msg + in case get_header headers "mime-version:" get_mime_version of + -- We only try and be clever if the MIME version is 1.0 + Just (MIMEVersion 1 0) -> + parse_mime_message ascii_text_content_type msg + _ -> + do let m_from = get_header headers "from:" get_from + m_subject = get_header headers "subject:" (Just . Subject) + m_to = get_header headers "to:" get_to + m_date = get_header headers "date:" get_date + mi = MessageInfo { + mi_headers = headers, + mi_from = m_from, + mi_subject = m_subject, + mi_to = m_to, + mi_date = m_date, + mi_content_description = Nothing + } + mc = case m_body of + Just body -> + mkBody ascii_text_content_type "unknown" + (convertAsciiToUtf8 body) + Nothing -> + return $ NoContent ascii_text_content_type + mkMessage mi mc + +convertAsciiToUtf8 :: String -> String +convertAsciiToUtf8 xs + = case convert Fuzzy "US-ASCII" "utf8" xs of + ConversionSuccess xs' -> xs' + ConversionFailed -> + error "convertAsciiToUtf8: Can't happen XXX: Fuzzy conversion failed" + ConversionUnsupported -> + error "convertAsciiToUtf8: Can't happen XXX: Conversion unsupported" + +parse_mime_message :: ContentType -> String -> ParseM Message +parse_mime_message def_content_type msg + = let (headers, m_body) = parse_headers msg + mi = make_mime_message_info headers + mc = case m_body of + Nothing -> + do let m_ct = get_header headers "content-type:" + get_content_type + content_type = fromMaybe def_content_type m_ct + return $ NoContent content_type + Just body -> + make_mime_message_content def_content_type headers body + in mkMessage mi mc + +make_mime_message_info :: Headers -> MessageInfo +make_mime_message_info headers + = let m_content_description = get_header headers "content-description:" + get_content_description + m_from = get_header headers "from:" get_from + m_subject = get_header headers "subject:" get_subject + m_to = get_header headers "to:" get_to + m_date = get_header headers "date:" get_date + in MessageInfo { + mi_headers = headers, + mi_from = m_from, + mi_subject = m_subject, + mi_to = m_to, + mi_date = m_date, + mi_content_description = m_content_description + } + +make_mime_message_content :: ContentType -> Headers -> String + -> ParseM MessageContent +make_mime_message_content def_content_type headers body + = -- We accept illegal combinations of content type and + -- encoding, so just decode whatever it says + case m_decoded_body of + Nothing -> + mkData (Just cte) content_type filename body + Just decoded_body -> + case content_disposition of + ContentDisposition Attachment _ -> + mkData Nothing content_type filename decoded_body + ContentDisposition Inline _ -> + case content_type of + ContentType "text" _ ps -> + let charset = fromMaybe "US-ASCII" + $ lookup_param "charset" ps + in case convert Fuzzy charset "utf8" decoded_body of + ConversionSuccess xs -> + mkBody content_type filename xs + ConversionUnsupported -> + mkData Nothing content_type filename decoded_body + ConversionFailed -> + error "make_mime_message_content: Fuzzy conversion failed: Can't happen XXX" + ContentType "multipart" st ps + | Just raw_b <- lookup_param "boundary" ps, + Just b <- get_boundary raw_b + -> do let (preamble, parts, epilogue) + = get_parts b decoded_body + ct = case st of + "digest" -> digest_content_type + _ -> ascii_text_content_type + constr = case st of + "alternative" -> Alternative + "parallel" -> Parallel + "digest" -> Digest + _ -> Mixed + ms <- mapM (parse_mime_message ct) parts + return $ constr (Multipart preamble ms epilogue) + ContentType "message" "rfc822" _ -> + liftM (RFC822 decoded_body filename) + (parse_message decoded_body) + -- Anything else is treated like an + -- application/octet-stream + _ -> mkData Nothing content_type filename decoded_body + where m_cd = get_header headers "content-disposition:" + get_content_disposition + content_disposition = fromMaybe (ContentDisposition Inline []) m_cd + m_ct = get_header headers "content-type:" + get_content_type + content_type = fromMaybe def_content_type m_ct + filename = get_filename content_disposition content_type + m_ce = get_header headers "content-transfer-encoding:" + get_content_transfer_encoding + cte@(ContentTransferEncoding content_transfer_encoding) + = fromMaybe (ContentTransferEncoding "7bit") m_ce + m_decoded_body + = if content_transfer_encoding == "base64" then + Just (Base64.decode body) + else if content_transfer_encoding == "quoted-printable" then + Just (QuotedPrintable.decode $ my_lines body) + else if content_transfer_encoding `elem` + ["7bit", "8bit", "binary"] then + -- Don't worry if 8-bit data is in 7-bit transfer-encoded data + Just body + else Nothing + +get_filename :: ContentDisposition -> ContentType -> FilePath +get_filename (ContentDisposition _ params) (ContentType _ _ params') + = loop params + where loop [] = -- Look up legacy name parameter in content type + case lookup_param "name" params' of + Nothing -> default_filename + Just f -> sanitise f + loop (Filename f:_) = sanitise f + loop (_:ps) = loop ps + sanitise f = case reverse $ takeWhile ('/' /=) $ reverse f of + "" -> default_filename + f' -> f' + default_filename = "unknown" + +get_parts :: String -> String -> (String, [String], String) +get_parts boundary body + = case gps [] body of + (pre:parts, epi) -> (pre, parts, epi) + _ -> error "Parse.get_parts: Can't happen XXX" + where gps acc "" = ([from_acc acc], "") + gps acc xs + = case fmap (dropWhile isWSP) $ after dd_boundary + $ snd $ read_line_ending xs of + Just "--" -> ([from_acc acc], "") + Just ('-':'-':cs@(c:_)) + | is_cr_or_lf c -> ([from_acc acc], cs) + Just "" -> ([from_acc acc], "") + Just (c1:cs) + | is_cr_or_lf c1 + -> let cs' = case cs of + c2:cs'' + | is_cr_or_lf c2 && c1 /= c2 + -> cs'' + _ -> cs + in case gps [] cs' of + (ps, ep) -> (from_acc acc:ps, ep) + _ -> case read_line_ending xs of + (le, xs') -> + case break is_cr_or_lf xs' of + (ys, zs) -> gps (ys:le:acc) zs + from_acc acc = concat $ reverse acc + read_line_ending cs = case cs of + (c1:cs1) + | is_cr_or_lf c1 -> + case cs1 of + (c2:cs2) + | is_cr_or_lf c2 && c1 /= c2 -> + ([c1, c2], cs2) + _ -> ([c1], cs1) + _ -> ("", cs) + after "" ys = Just ys + after (x:xs) (y:ys) + | x == y = after xs ys + | otherwise = Nothing + after (_:_) "" = Nothing + dd_boundary = "--" ++ boundary + isWSP ' ' = True + isWSP '\t' = True + isWSP _ = False + +-- Returns the value of the first parameter of the name (must be lower cased) +lookup_param :: String -> [Parameter] -> Maybe String +lookup_param _ [] = Nothing +lookup_param name (Parameter n v:ps) + | name == n = Just v + | otherwise = lookup_param name ps + +get_header :: Headers -> String -> (String -> Maybe a) -> Maybe a +get_header hs name getter + = case filter ((name ==) . h_name) hs of + [h] -> getter (h_body h) + _ -> Nothing + +-- We skip over leading white space lines, both for resilience and +-- because this is allowed for MIME part headers. +parse_headers :: String -> (Headers, Maybe String) +parse_headers msg = skip_whitespace (Just msg) + where skip_whitespace :: Maybe String -> ([Header], Maybe String) + skip_whitespace Nothing = ([], Nothing) + skip_whitespace (Just xs) = case get_line xs of + ([], m_zs) -> ([], m_zs) + (ys, m_zs) -> + case dropWhile isWhite ys of + [] -> skip_whitespace m_zs + ys' -> gather [ys'] m_zs + gather :: [String] -> Maybe String -> ([Header], Maybe String) + gather acc Nothing = ([mk_header acc], Nothing) + gather acc (Just xs) + = case get_line xs of + ([], m_zs) -> ([mk_header acc], m_zs) + (ys, m_zs) + | starts_with_white ys -> gather (ys:acc) m_zs + | otherwise -> let (hs, m_rest) = gather [ys] m_zs + in (mk_header acc:hs, m_rest) + starts_with_white (c:_) = isWhite c + starts_with_white [] = False + isWhite ' ' = True + isWhite '\t' = True + isWhite _ = False + +-- Takes the lines comprising a header (in reverse order) and constructs +-- the corresponding Header +mk_header :: [String] -> Header +mk_header xs = let unfolded = concat xs' + (raw_name, body) = case break ends_header unfolded of + (name, ':':val) -> (name ++ ":", val) + (name, val) -> (name, val) + in Header { + h_raw_header = xs', + h_raw_name = raw_name, + h_name = map asciiToLower raw_name, + h_body = body + } + where ends_header ':' = True + ends_header ' ' = True + ends_header '\t' = True + ends_header _ = False + xs' = reverse xs + diff --git a/Codec/MIME/String/QuotedPrintable.hs b/Codec/MIME/String/QuotedPrintable.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/QuotedPrintable.hs @@ -0,0 +1,60 @@ + +-- Defined in RFC 2045. +-- We assume we have US-ASCII characters. +-- We return a string with native '\n' line endings. + +module Codec.MIME.String.QuotedPrintable (encode, decode) where + +import Codec.MIME.String.Internal.Utils +import Data.Bits +import Data.Char +import Data.List + +encode :: [String] -> String +encode = enc 0 + +-- The Int is the number of characters on this line so far +-- 76 is the maximum we can have no one line, and 3 is the most +-- generated for 1 input char (but we also need space for a trailing +-- '=' for a soft line break). +enc :: Int -> [String] -> String +enc _ [] = "" +enc _ [[]] = "" +enc _ ([]:ls) = '\n':enc 0 ls +enc n ls | n > 72 = '=':'\n':enc 0 ls +enc n ((c:cs):ls) + | (33 <= o && o <= 126 && o /= 61) || + (not (null cs) && (o == 9 || o == 32)) = c:enc (n+1) (cs:ls) + | otherwise = '=':x1:x2:enc (n+3) (cs:ls) + where o = ord c + x1 = toUpper $ intToDigit (o `shiftR` 4) + x2 = toUpper $ intToDigit (o .&. 0xF) + +-- decode is very forgiving, and makes some best guesses +decode :: [String] -> String +decode = dec . concat . intersperse "\n" + . removeSoftLinebreaks + . map (dropFromEndWhile is_tab_space) + where is_tab_space ' ' = True + is_tab_space '\t' = True + is_tab_space _ = False + breakLast "" = ("", "") + breakLast [x] = ("", [x]) + breakLast (x:xs) = case breakLast xs of + (ys, zs) -> (x:ys, zs) + removeSoftLinebreaks [] = [] + removeSoftLinebreaks (x:xs) + = case breakLast x of + (x', "=") -> + case removeSoftLinebreaks xs of + [] -> [x'] + (y:ys) -> (x' ++ y):ys + _ -> x:removeSoftLinebreaks xs + +dec :: String -> String +dec ('=':c1:c2:cs) + | isAsciiHexDigit c1 && isAsciiHexDigit c2 + = chr ((digitToInt c1 `shiftL` 4) + digitToInt c2):dec cs +dec (c:cs) = c:dec cs +dec "" = "" + diff --git a/Codec/MIME/String/Types.hs b/Codec/MIME/String/Types.hs new file mode 100644 --- /dev/null +++ b/Codec/MIME/String/Types.hs @@ -0,0 +1,82 @@ + +module Codec.MIME.String.Types + ( + ParseM, PartNumber, Headers, + Header(Header, h_raw_header, h_raw_name, h_name, h_body), + Message(..), MessageInfo(..), Multipart(Multipart), + MessageContent(NoContent, Body, Data, Mixed, Alternative, + Parallel, Digest, RFC822), + mkData, mkBody, + digest_content_type, ascii_text_content_type, + ) + where + +import Codec.MIME.String.Date (FullDate) +import Codec.MIME.String.Headers + ( + ContentType(ContentType), ContentDescription, ContentTransferEncoding, + Parameter(Parameter), From, To, Subject, + ) +import Codec.MIME.String.Internal.Utils (my_lines) + +import Control.Monad.State (State) + +type Headers = [Header] +data Header = Header { + h_raw_header :: [String], + h_raw_name :: String, + h_name :: String, + h_body :: String + } + deriving (Show, Read) + +data MessageInfo = MessageInfo { + mi_headers :: Headers, + mi_from :: Maybe From, + mi_to :: Maybe To, + mi_subject :: Maybe Subject, + mi_date :: Maybe FullDate, + mi_content_description :: Maybe ContentDescription + } + deriving (Show, Read) +data MessageContent = NoContent ContentType + | Body ContentType FilePath String -- UTF-8 text + | Data (Maybe ContentTransferEncoding) + ContentType FilePath String -- 8-bit data + | Mixed Multipart + | Alternative Multipart + | Parallel Multipart + | Digest Multipart + | RFC822 String{- unparsed message-} FilePath Message + deriving (Show, Read) + +type ParseM a = State PartNumber a + +mkBody :: ContentType -> FilePath -> String -> ParseM MessageContent +mkBody ct fp s = return $ Body ct fp $ unlines $ my_lines s + +mkData :: Maybe ContentTransferEncoding -> ContentType -> FilePath + -> String -> ParseM MessageContent +mkData m_cte ct fp s = return $ Data m_cte ct fp s + +data Multipart = Multipart String -- Preamble + [Message] -- The messages themselves + String -- Epilogue + deriving (Show, Read) + +type PartNumber = Integer + +data Message = Message { + m_part_number :: PartNumber, + m_message_info :: MessageInfo, + m_message_content :: MessageContent + } + deriving (Show, Read) + +ascii_text_content_type :: ContentType +ascii_text_content_type + = ContentType "text" "plain" [Parameter "charset" "US-ASCII"] + +digest_content_type :: ContentType +digest_content_type = ContentType "message" "rfc822" [] + diff --git a/GPL-2 b/GPL-2 new file mode 100644 --- /dev/null +++ b/GPL-2 @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,8 @@ + +module Main (main) where + +import Distribution.Simple + +main :: IO () +main = defaultMain + diff --git a/mime-string.cabal b/mime-string.cabal new file mode 100644 --- /dev/null +++ b/mime-string.cabal @@ -0,0 +1,34 @@ +Name: mime-string +Version: 0.1 +License: OtherLicense +License-File: COPYING +Copyright: Ian Lynagh, 2005, 2007 +Author: Ian Lynagh +Maintainer: igloo@earth.li +Stability: experimental +Homepage: http://urchin.earth.li/~ian/cabal/mime-string/ +Synopsis: MIME implementation for String's. +Description: + Implementation of the MIME RFCs 2045-2049. + A bit rough around the edges. +Category: Codec +Tested-With: GHC==6.6 +Build-Depends: base, mtl, network, iconv, base64-string +Extensions: PatternGuards +Extra-source-files: "BSD3", "GPL-2" +Exposed-modules: + Codec.Binary.EncodingQ.String + Codec.MIME.String + Codec.MIME.String.ContentDisposition + Codec.MIME.String.Date + Codec.MIME.String.EncodedWord + Codec.MIME.String.Flatten + Codec.MIME.String.Headers + Codec.MIME.String.Parse + Codec.MIME.String.Types + Codec.MIME.String.QuotedPrintable +Other-Modules: + Codec.MIME.String.Internal.ABNF + Codec.MIME.String.Internal.Utils +GHC-Options: -O -Wall -Werror +