module Text.LDIF.Parser (
parseLDIFStr,
parseLDIFFile,
parseDNStr
)
where
import Text.LDIF.Types
import Text.ParserCombinators.Parsec
import Data.Either
import Data.Char
import Data.List (isPrefixOf)
parseLDIFStr :: String -> Either ParseError LDIF
parseLDIFStr = parse pLdif "(param)" . preproc
parseLDIFFile :: String -> IO (Either ParseError LDIF)
parseLDIFFile name = do
input <- readFile name
return $ parse pLdif name (preproc input)
parseDNStr :: String -> Either ParseError DN
parseDNStr = parse pDN "(param)"
preproc :: String -> String
preproc = unwrap . stripComments
stripComments :: String -> String
stripComments input = unlines $ filter (not . isPrefixOf "#") $ lines input
unwrap :: String -> String
unwrap input = unlines $ preprocLines $ lines input
where
preprocLines xs = unbox $ foldl (preprocLine) ([],Nothing) xs
preprocLine (ys,r) [] = (addLineMaybe ys r,Just [])
preprocLine (ys,r) (l:lx) | l == ' ' = (ys,concatLineMaybe r lx)
| otherwise = (addLineMaybe ys r, Just $ l:lx)
concatLineMaybe Nothing x = Just x
concatLineMaybe (Just y) x = Just (y++x)
addLineMaybe xs Nothing = xs
addLineMaybe xs (Just x) = xs++[x]
unbox (ys,Nothing) = ys
unbox (ys,Just x) = ys++[x]
pLdif :: CharParser st LDIF
pLdif = try pLdifChanges <|> pLdifContent
pLdifChanges :: CharParser st LDIF
pLdifChanges = do
ver <- optionMaybe pVersionSpec
recs <- sepEndBy1 pChangeRec pSEPs
return $ LDIFChanges ver recs
pLdifContent :: CharParser st LDIF
pLdifContent = do
ver <- optionMaybe pVersionSpec
recs <- sepEndBy1 pAttrValRec pSEPs
return $ LDIFContent ver recs
pAttrValRec :: CharParser st ContentRecord
pAttrValRec = do
dn <- pDNSpec
pSEP
attrVals <- sepEndBy1 pAttrValSpec pSEP
return $ ContentRecord dn attrVals
pChangeRec :: CharParser st ChangeRecord
pChangeRec = try pChangeAdd
<|> try pChangeDel
<|> try pChangeMod
<|> pChangeModDN
pChangeAdd :: CharParser st ChangeRecord
pChangeAdd = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "add"
pSEP
vals <- sepEndBy1 pAttrValSpec pSEP
return $ ChangeRecord dn (ChangeAdd vals)
pChangeDel :: CharParser st ChangeRecord
pChangeDel = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "delete"
pSEP
return $ ChangeRecord dn ChangeDelete
pChangeMod :: CharParser st ChangeRecord
pChangeMod = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "modify"
pSEP
mods <- sepEndBy1 pModSpec (char '-' >> pSEP)
return $ ChangeRecord dn (ChangeModify mods)
pChangeModDN :: CharParser st ChangeRecord
pChangeModDN = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "modrdn"
pSEP
string "newrdn:"
pFILL
pRDN
pSEP
string "deleteoldrdn:"
pFILL
oneOf "01"
pSEP
return $ ChangeRecord dn ChangeModDN
pRDN :: CharParser st String
pRDN = pSafeString
pDNSpec :: CharParser st DN
pDNSpec = do
string "dn:"
pDN
pDN :: CharParser st DN
pDN = do
pFILL
avals <- sepEndBy pAttrEqValue (char ',')
return $ DN avals
pAttrEqValue :: CharParser st AttrValue
pAttrEqValue = do
att <- pAttributeType
char '='
val <- pAttrValueDN
return (att,val)
pAttrValueDN :: CharParser st Value
pAttrValueDN = do
many (noneOf stringChars)
where
specialChars = [',','=','+','<','>','#',';','\n','\r']
stringChars = '\\':'"':specialChars
pVersionSpec :: CharParser st String
pVersionSpec = do
string "version:"
pFILL
many1 digit
pModSpec :: CharParser st Modify
pModSpec = do
modType <- pModType
pFILL
att <- pAttributeDescription
pSEP
vals <- sepEndBy pAttrValSpec pSEP
return $ mkMod modType att vals
mkMod :: String -> String -> [AttrValue] -> Modify
mkMod modType att vals | modType == "add:" = ModAdd att (map (snd) vals)
| modType == "delete:" = ModDelete att (map (snd) vals)
| modType == "replace:" = ModReplace att (map (snd) vals)
| otherwise = error $ "unexpected mod:" ++ modType
pModType :: CharParser st String
pModType = try (string "add:")
<|> try (string "delete:")
<|> string "replace:"
pAttributeDescription :: CharParser st String
pAttributeDescription = pAttributeType
pAttributeType :: CharParser st String
pAttributeType = try pLdapOid
<|> (do { l <- letter; o <- pAttrTypeChars; return $ l:o } )
pAttrValSpec :: CharParser st AttrValue
pAttrValSpec = do
name <- pAttributeDescription
val <- pValueSpec
return (name, val)
pValueSpec :: CharParser st Value
pValueSpec = try (char ':' >> char ':' >> pFILL >> pBase64String)
<|> try (char ':' >> pFILL >> pSafeString)
<|> (char ':' >> char '<' >> pFILL >> pURL)
pURL :: CharParser st String
pURL = pSafeString
pSafeString :: CharParser st String
pSafeString = do
c <- noneOf "\n\r :<"
r <- many (noneOf "\n\r")
return $ c:r
pBase64String :: CharParser st String
pBase64String = pSafeString
pAttrTypeChars :: CharParser st String
pAttrTypeChars = many (satisfy (\x -> isAlphaNum x || x == '-'))
pLdapOid :: CharParser st String
pLdapOid = do
num <- many1 digit
rest <- many (do { string "."; n <- many1 digit; return $ '.':n})
return $ num ++ concat rest
pFILL :: CharParser st ()
pFILL = spaces
pSEP :: CharParser st ()
pSEP = try (char '\r' >> char '\n' >> return () )
<|> (char '\n' >> return () )
pSEPs :: CharParser st ()
pSEPs = many pSEP >> return ()