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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 Lesser General +Public License instead of this License. But first, please read +. diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/src/Text/XML/WSDL/Parser.hs b/src/Text/XML/WSDL/Parser.hs new file mode 100644 --- /dev/null +++ b/src/Text/XML/WSDL/Parser.hs @@ -0,0 +1,218 @@ +{-# LANGUAGE CPP #-} +{-# LANGUAGE FlexibleContexts #-} +{-# LANGUAGE NoMonomorphismRestriction #-} +{-# LANGUAGE OverloadedStrings #-} +{-# LANGUAGE RankNTypes #-} +{-# LANGUAGE RecordWildCards #-} + +-- | For parsing WSDLs. +module Text.XML.WSDL.Parser ( + parseLBS, parseFile +) where + +#if __GLASGOW_HASKELL__ <= 708 +import Control.Applicative (pure, (<$>)) +#endif +import Control.Monad +import Control.Monad.Catch (MonadThrow, throwM) +import Control.Monad.Reader +import Control.Monad.Trans.Resource (MonadResource) +import Data.ByteString.Lazy (ByteString) +import Data.Conduit +import Data.Maybe +import Data.String +import Data.Text (Text) +import qualified Data.Text as T +import Data.XML.Types +import Network.URI (parseURI) +import Text.XML.Stream.Parse hiding (parseFile, parseLBS) +import qualified Text.XML.Stream.Parse as P + +import Text.XML.WSDL.Types + +data ParseState = ParseState + { psDocumentNamespace :: Maybe Text + -- , psDocumentSchemas :: [Schema] + } deriving Show + +type Parser a = forall m o. (MonadThrow m, MonadReader ParseState m) => ConduitM Event o m a + +emptyParseState :: ParseState +emptyParseState = ParseState Nothing -- [] + +-- | Parse a 'ByteString' into a WSDL. +parseLBS :: MonadThrow m => ByteString -> m WSDL +parseLBS t = runReaderT (P.parseLBS def t $$ parseWSDL) emptyParseState + +-- | Parse a file into a WSDL. +parseFile :: MonadResource m => FilePath -> m WSDL +parseFile f = runReaderT (P.parseFile def f $$ parseWSDL) emptyParseState + +ignoreDocs :: MonadThrow m => ConduitM Event Event m b +ignoreDocs = forever $ do + p <- await + case p of + Just d@(EventBeginElement n _) | nameLocalName n == "documentation" -> do + leftover d + void $ ignoreTree ((== "documentation") . nameLocalName) + Just x -> yield x + Nothing -> return () + +parseWSDL :: MonadThrow m => ConduitM Event o (ReaderT ParseState m) WSDL +parseWSDL = (ignoreDocs =$) $ force "Missing WSDL" $ tag + (\ n -> if nameLocalName n == "definitions" then Just n else Nothing) + (\ n -> do + tns <- (>>= parseURI . T.unpack) <$> attr "targetNamespace" + docname <- (textToName <$>) <$> attr "name" + return (n, tns, docname) + ) + (\ (n, tns, docname) -> local (\ a -> a { psDocumentNamespace = nameNamespace n }) $ do + xel <- many parseXElement + tys <- parseTypes + messages <- many parseMessage + portTypes <- many parsePortType + bindings <- many parseBinding + services <- many parseService + return $ WSDL tns docname tys messages portTypes bindings services xel) + +parseTypes :: Parser (Maybe WSDLTypes) +parseTypes = tagNS "types" ignoreAttrs + (\ _ -> do + ss <- many parseSchema + return $ WSDLTypes ss []) + +parseSchema :: MonadThrow m => ConduitM Event o m (Maybe Schema) +parseSchema = tagPredicate ((== "schema") . nameLocalName) ignoreAttrs + (\ _ -> many ignoreAllTreesContent >> return Schema) + +parseMessage :: Parser (Maybe WSDLMessage) +parseMessage = tagNS "message" (requireAttr "name") + (\ t -> do + parts <- many parsePart + return $ WSDLMessage t parts) + +parsePart :: Parser (Maybe WSDLMessagePart) +parsePart = tagNS "part" + (liftM3 (,,) + (requireAttr "name") + (attr "element") + (attr "type")) + (\ (n,e,t) -> do + unless (isJust e || isJust t) $ + throwM $ XmlException "Element or type required" Nothing + return $ WSDLMessagePart + (textToName n) + (textToName <$> e) + (textToName <$> t)) + +parsePortType :: Parser (Maybe WSDLPortType) +parsePortType = tagNS "portType" (requireAttr "name") + (\ n -> do + ops <- many parseAbstractOperation + return $ WSDLPortType n ops) + +parseAbstractOperation :: Parser (Maybe AbstractOperation) +parseAbstractOperation = choose [parseOpReqRes] + +parseOpReqRes :: Parser (Maybe AbstractOperation) +parseOpReqRes = opTag $ \ (n, order) -> do + inpM <- parseInputMessage + case inpM of + Nothing -> return Nothing + Just inp -> do + oupM <- parseOutputMessage + case oupM of + Nothing -> return Nothing + Just oup -> do + faults <- many parseFault + return . Just $ AbstractRequestResponseOperation n inp oup faults (maybeToList order) + +parseBinding :: Parser (Maybe WSDLBinding) +parseBinding = tagNS "binding" + (liftM2 (,) (requireAttr "name") (requireAttr "type")) + (\ (n,t) -> do + xel <- many parseXElement + ops <- many parseBindingOperation + return $ WSDLBinding n (textToName t) ops xel) + +parseBindingOperation :: Parser (Maybe ConcreteOperation) +parseBindingOperation = tagNS "operation" + (requireAttr "name") + (\ n -> do + xel <- many parseXElement + cin <- parseCInputMessage + cout <- parseCOutputMessage + faults <- many parseCFaultMessage + return $ ConcreteOperation n cin cout faults xel) + +parseCInputMessage :: Parser (Maybe ConcreteInputMessage) +parseCInputMessage = tagNS "input" (attr "name") + (\ n -> ConcreteInputMessage n <$> many parseXElement) + +parseCOutputMessage :: Parser (Maybe ConcreteOutputMessage) +parseCOutputMessage = tagNS "output" (attr "name") + (\ n -> ConcreteOutputMessage n <$> many parseXElement) + +parseCFaultMessage :: Parser (Maybe ConcreteFaultMessage) +parseCFaultMessage = tagNS "output" (requireAttr "name") + (\ n -> ConcreteFaultMessage n <$> many parseXElement) + +parseXElement :: MonadThrow m => ConduitM Event o m (Maybe Node) +parseXElement = tag (\ n -> if isNothing (namePrefix n) then Nothing else Just n) + (\ n -> (,) n <$> manyA (optionalAttrRaw Just)) + (\ (name, attrs) -> return $ NodeElement $ Element name attrs []) + where + manyA x = do + x' <- x + case x' of + Just y -> (y:) <$> manyA x + Nothing -> pure [] + +opTag :: (MonadReader ParseState m, MonadThrow m) + => ((Text, Maybe Text) -> ConduitM Event o m (Maybe a)) + -> ConduitM Event o m (Maybe a) +opTag = fmap join . tagNS "operation" (liftM2 (,) (requireAttr "name") (attr "parameterOrder")) + +parseInputMessage :: Parser (Maybe InputMessage) +parseInputMessage = tagNS "input" + (liftM2 (,) (attr "name") (textToName <$> requireAttr "message")) + (return . uncurry InputMessage) + +parseOutputMessage :: Parser (Maybe OutputMessage) +parseOutputMessage = tagNS "output" + (liftM2 (,) (attr "name") (textToName <$> requireAttr "message")) + (return . uncurry OutputMessage) + +parseFault :: Parser (Maybe FaultMessage) +parseFault = tagNS "fault" + (liftM2 (,) (requireAttr "name") (textToName <$> requireAttr "message")) + (return . uncurry FaultMessage) + +parseService :: Parser (Maybe WSDLService) +parseService = tagNS "service" (requireAttr "name") + (\ n -> do + xel <- many parseXElement + ports <- many parsePort + return $ WSDLService n ports xel) + +parsePort :: Parser (Maybe WSDLPort) +parsePort = tagNS "port" (liftM2 (,) (requireAttr "name") (requireAttr "binding")) + (\ (n,b) -> do + xel <- many parseXElement + return $ WSDLPort n (textToName b) xel) + +textToName :: T.Text -> Name +textToName s = case fromString (T.unpack s) of + Name {..} -> case T.split (== ':') nameLocalName of + [pre, x] -> Name x nameNamespace (Just pre) + [x] -> Name x nameNamespace Nothing + _ -> error "invalid name" + +tagNS :: (MonadReader ParseState m, MonadThrow m) + => Text + -> AttrParser a + -> (a -> ConduitM Event o m b) + -> ConduitM Event o m (Maybe b) +tagNS t a p = do + ns <- asks psDocumentNamespace + tagPredicate (\ n -> nameLocalName n == t && nameNamespace n == ns) a p diff --git a/src/Text/XML/WSDL/Types.hs b/src/Text/XML/WSDL/Types.hs new file mode 100644 --- /dev/null +++ b/src/Text/XML/WSDL/Types.hs @@ -0,0 +1,195 @@ +{-# LANGUAGE CPP #-} +{-# LANGUAGE DeriveDataTypeable #-} + +#ifdef __GLASGOW_HASKELL__ +{-# LANGUAGE DeriveGeneric #-} +#define GENERIC , Generic +#else +#define GENERIC +#endif + +#define INSTANCES (Eq, Show, Typeable GENERIC) + +-- | A description of WSDLs. Most of the verbiage here is copied verbatim +-- from the WSDL spec: see http://www.w3.org/TR/wsdl. +-- +-- TODO: +-- * Documentation support +-- * Schema support +module Text.XML.WSDL.Types where + +import Data.Text (Text) +import Data.Typeable (Typeable) +import Data.XML.Types (Name, Node) +import Network.URI (URI) +#ifdef __GLASGOW_HASKELL__ +import GHC.Generics +#endif + +-- | Represents a WSDL document; this contains the six WSDL elements as +-- described below, as well as @name@ and @targetNamespace@ as defined in +-- the spec. +-- +-- WSDL documents can be assigned an optional @name@ attribute that serves +-- as a lightweight form of documentation. Optionally, a @targetNamespace@ +-- attribute may be specified. This represents the URI associated with the +-- WSDL. +data WSDL = WSDL + { targetNamespace :: Maybe URI + , documentName :: Maybe Name + , types :: Maybe WSDLTypes + , messages :: [WSDLMessage] + , portTypes :: [WSDLPortType] + , bindings :: [WSDLBinding] + , services :: [WSDLService] + , additionalWSDLInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- * Document elements + +-- *** Type definitions +-- | Data type definitions used to describe the messages exchanged. +data WSDLTypes = WSDLTypes + { schemas :: [Schema] + , additionalTypeInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- *** Messages +-- | Represents an abstract definition of the data being transmitted. +-- A message consists of logical parts, each of which is associated with +-- a definition within some type system. +data WSDLMessage = WSDLMessage + { wsdlMessageName :: Text + , wsdlMessageParts :: [WSDLMessagePart] + } deriving INSTANCES + +-- | Messages consist of one or more logical 'WSDLMessagePart's. +data WSDLMessagePart = WSDLMessagePart + { wsdlMessagePartName :: Name + , wsdlMessagePartElement :: Maybe Name + , wsdlMessagePartType :: Maybe Name + } deriving INSTANCES + +-- *** Port types +-- | A set of abstract operations. Each operation refers to an input +-- 'WSDLMessage' and output 'WSDLMessage's. +-- +-- NB: Though the WSDL spec explicitly mentions that each operation refers +-- to an input message, the grammar provided on the W3 site makes +-- @\@ optional. The wording of the spec, rather than the example +-- grammar, is followed here. +data WSDLPortType = WSDLPortType + { wsdlPortTypeName :: Text + , wsdlPortTypeOperations :: [AbstractOperation] + } deriving INSTANCES + +-- | A 'WSDLPortType' is a named set of 'AbstractOperation's and the +-- abstract messages involved. +data AbstractOperation = AbstractOneWayOperation + { operationName :: Text + , operationInput :: InputMessage + , operationParameterOrder :: [Text] } + | AbstractRequestResponseOperation + { operationName :: Text + , operationInput :: InputMessage + , operationOutput :: OutputMessage + , operationFaults :: [FaultMessage] + , operationParameterOrder :: [Text] } + | AbstractSolicitResponseOperation + { operationName :: Text + , operationOutput :: OutputMessage + , operationInput :: InputMessage + , operationFaults :: [FaultMessage] + , operationParameterOrder :: [Text] } + | AbstractNotificationOperation + { operationName :: Text + , operationOutput :: OutputMessage + , operationParameterOrder :: [Text] } + deriving INSTANCES + +-- | An abstract message representing input to the given operation. +data InputMessage = InputMessage + { inputMessageName :: Maybe Text + , inputMessageType :: Name + } deriving INSTANCES + +-- | An abstract message representing output from the given operation. +data OutputMessage = OutputMessage + { outputMessageName :: Maybe Text + , outputMessageType :: Name + } deriving INSTANCES + +-- | An abstract message representing faults returned by the given operation. +data FaultMessage = FaultMessage + { faultMessageName :: Text + , faultMessageType :: Name + } deriving INSTANCES + +-- *** Bindings +-- | Specifies a concrete protocol and data format specifications for the +-- operations and messages defined by a particular 'WSDLPortType'. +data WSDLBinding = WSDLBinding + { wsdlBindingName :: Text + , wsdlBindingType :: Name + , wsdlBindingOperations :: [ConcreteOperation] + , additionalBindingInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- | Describes a concrete operation. +data ConcreteOperation = ConcreteOperation + { cOperationName :: Text + , cOperationInput :: Maybe ConcreteInputMessage + , cOperationOutput :: Maybe ConcreteOutputMessage + , cOperationFault :: [ConcreteFaultMessage] + , additionalOperationInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- | A concrete message representing input to the given operation. +data ConcreteInputMessage = ConcreteInputMessage + { cInputMessageName :: Maybe Text + , additionalConcreteInputInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- | A concrete message representing output from the given operation. +data ConcreteOutputMessage = ConcreteOutputMessage + { cOutputMessageName :: Maybe Text + , additionalConcreteOutputInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- | A concrete message representing faults returned by the given operation. +data ConcreteFaultMessage = ConcreteFaultMessage + { cFaultMessageName :: Text + , additionalConcreteFaultInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- *** Services +-- | Used to aggregate a set of related 'WSDLPort's. +data WSDLService = WSDLService + { wsdlServiceName :: Text + , wsdlServicePorts :: [WSDLPort] + , additionalServiceInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- *** Ports +-- | Specifies the address for a 'WSDLBinding', thus defining a single +-- communication endpoint. +data WSDLPort = WSDLPort + { wsdlPortName :: Text + , wsdlPortBinding :: Name + , additionalPortInfo :: [ExtensibilityElement] + } deriving INSTANCES + +-- * Additional properties +-- *** Extensibility elements +-- | Certain tags in a WSDL document can have additional information +-- associated with them by way of Extensibility Elements. These are +-- generally used to specify binding information for a specific protocol +-- or format (e.g. SOAP). +type ExtensibilityElement = Node + +-- *** Documentation +-- | Documentation can appear inside any WSDL element. +type Documentation = Maybe Node + +-- | Placeholder +data Schema = Schema deriving INSTANCES diff --git a/tests/hspec.hs b/tests/hspec.hs new file mode 100644 --- /dev/null +++ b/tests/hspec.hs @@ -0,0 +1,36 @@ +{-# LANGUAGE OverloadedStrings #-} +{-# LANGUAGE TemplateHaskell #-} + +import Control.Exception +import Control.Monad hiding (forM_) +import Data.ByteString.Lazy (fromStrict) +import Data.Either +import Data.FileEmbed +import Data.Foldable (forM_) +import Network.URI +import Test.Hspec +import Text.XML.WSDL.Parser +import Text.XML.WSDL.Types + +parsedWsdl :: Either SomeException WSDL +parsedWsdl = parseLBS $ fromStrict $(embedFile "tests/hello.wsdl") + +main :: IO () +main = forM_ parsedWsdl $ \ wsdl -> hspec $ do + describe "WSDL" $ it "Show" $ show wsdl `shouldStartWith` "WSDL" + + describe "parse" $ do + it "targetNamespace" $ + targetNamespace wsdl `shouldBe` parseURI "http://www.examples.com/wsdl/HelloService.wsdl" + it "types" $ + types wsdl `shouldBe` Just (WSDLTypes [Schema] []) + describe "messages" $ do + let firstMessage = head (messages wsdl) + it "names" $ + wsdlMessageName firstMessage `shouldBe` "SayHelloRequest" + describe "parts" $ do + let firstPart = head (wsdlMessageParts firstMessage) + it "names" $ + wsdlMessagePartName firstPart `shouldBe` "firstName" + it "types" $ + wsdlMessagePartType firstPart `shouldBe` Just "string" diff --git a/wsdl.cabal b/wsdl.cabal new file mode 100644 --- /dev/null +++ b/wsdl.cabal @@ -0,0 +1,44 @@ +-- Initial wsdl.cabal generated by cabal init. For further documentation, +-- see http://haskell.org/cabal/users-guide/ + +name: wsdl +version: 0.1.0.0 +synopsis: WSDL parsing in Haskell +description: + DO NOT USE, UNSTABLE AND INCOMPLETE. + . + This library provides a definition of, parsing and [TODO] generation of WSDL documents. +license: GPL-3 +license-file: LICENSE +author: Jude Taylor +maintainer: me@jude.bio +category: XML +build-type: Simple +cabal-version: >=1.10 + +source-repository head + type: git + location: https://github.com/pikajude/hs-wsdl.git + +library + exposed-modules: Text.XML.WSDL.Types + Text.XML.WSDL.Parser + build-depends: base >= 4.7 && < 5 + , bytestring + , conduit + , exceptions + , mtl + , network-uri + , resourcet + , text + , xml-conduit + , xml-types + hs-source-dirs: src + default-language: Haskell2010 + ghc-options: -Wall + +test-suite spec + type: exitcode-stdio-1.0 + main-is: hspec.hs + hs-source-dirs: tests + build-depends: base, bytestring, file-embed, hspec, network-uri, wsdl