File: SoapClientFormatterSink.cs

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//
// System.Runtime.Remoting.Channels.SoapClientFormatterSink.cs
//
// Authors: 	Rodrigo Moya (rodrigo@ximian.com)
// 		Jean-Marc André (jean-marc.andre@polymtl.ca)
//
// 2002 (C) Copyright, Ximian, Inc.
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.Collections;
using System.IO;
using System.Reflection;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters;
using System.Runtime.Serialization.Formatters.Soap;

namespace System.Runtime.Remoting.Channels
{
	public class SoapClientFormatterSink : IClientFormatterSink,
		IMessageSink, IClientChannelSink, IChannelSinkBase
	{
		private IClientChannelSink _nextChannelSink;
		private SoapCore _soapCore = SoapCore.DefaultInstance;

		public SoapClientFormatterSink (IClientChannelSink nextSink)
		{
			_nextChannelSink = nextSink;
		}
		
		internal SoapCore SoapCore {
			get { return _soapCore; }
			set { _soapCore = value; }
		}
		
		// IClientChannelSink
		public IClientChannelSink NextChannelSink {
			get {
				return _nextChannelSink;
			}
		}
		
		// IMessageSink
		public IMessageSink NextSink {
			get {
				return null ;
			}
		}
		
		// IChannelSinkBase
		public IDictionary Properties {
			get {
				return null;
			}
		}

		public IMessageCtrl AsyncProcessMessage (IMessage msg,
							 IMessageSink replySink)
		{
			Stream requestStream;
			ITransportHeaders requestHeaders;
			SoapMessageFormatter soapMsgFormatter;
			
			SerializeMessage (msg, out requestStream, out requestHeaders,
				out soapMsgFormatter);

			ClientChannelSinkStack stack = new ClientChannelSinkStack (replySink);
			stack.Push(this, new CallData (msg, soapMsgFormatter));

			_nextChannelSink.AsyncProcessRequest (stack, msg, requestHeaders, requestStream);

			return null;
		}

		public void AsyncProcessRequest (IClientChannelSinkStack sinkStack,
						 IMessage msg,
						 ITransportHeaders headers,
						 Stream stream)
		{
			// this method should never be called
			throw new NotSupportedException ();
		}

		public void AsyncProcessResponse (IClientResponseChannelSinkStack sinkStack,
						  object state,
						  ITransportHeaders headers,
						  Stream stream)
		{
			CallData data = (CallData) state;
			SoapMessageFormatter soapMsgFormatter = data.Formatter;
			IMessage replyMessage = (IMessage) DeserializeMessage (
				stream, headers, (IMethodCallMessage) data.Msg,
				soapMsgFormatter);
			sinkStack.DispatchReplyMessage (replyMessage);
			
		}

		public Stream GetRequestStream (IMessage msg,
						ITransportHeaders headers)
		{
			// First sink in the chain so this method should never
			// be called
			throw new NotSupportedException ();
		}

		public void ProcessMessage (IMessage msg,
					    ITransportHeaders requestHeaders,
					    Stream requestStream,
					    out ITransportHeaders responseHeaders,
					    out Stream responseStream)
		{
			// First sink in the chain so this method should never
			// be called
			throw new NotSupportedException ();
			
		}

		public IMessage SyncProcessMessage (IMessage msg)
		{
			Stream requestStream, responseStream;
			ITransportHeaders requestHeaders, responseHeaders;
			SoapMessageFormatter soapMsgFormatter;

			SerializeMessage (msg, out requestStream, out requestHeaders,
				out soapMsgFormatter);
			_nextChannelSink.ProcessMessage(msg, requestHeaders,
				requestStream, out responseHeaders,
				out responseStream);

			return DeserializeMessage(responseStream, responseHeaders,
				(IMethodCallMessage) msg, soapMsgFormatter);
		}
		
		
		private void SerializeMessage(IMessage msg, out Stream requestStream, out ITransportHeaders requestHeaders, out SoapMessageFormatter soapMsgFormatter) {
			SoapMessage soapMsg;
			soapMsgFormatter = new SoapMessageFormatter();
			soapMsg = soapMsgFormatter.BuildSoapMessageFromMethodCall (
				(IMethodCallMessage) msg, out requestHeaders);

			// Get the stream where the message will be serialized
			requestStream = _nextChannelSink.GetRequestStream (msg,
				requestHeaders);

			if (requestStream == null)
				requestStream = new MemoryStream();

			// Serialize the message into the stream
			_soapCore.Serializer.Serialize(requestStream, soapMsg, null);

			if (requestStream is MemoryStream)
				requestStream.Position = 0;
		}
		
		
		private IMessage DeserializeMessage(Stream responseStream, ITransportHeaders responseHeaders,IMethodCallMessage mcm, SoapMessageFormatter soapMsgFormatter) 
		{
			SoapFormatter fm = _soapCore.GetSafeDeserializer ();
			SoapMessage rtnMessage = soapMsgFormatter.CreateSoapMessage (false);
			fm.TopObject = rtnMessage;
			object objReturn = fm.Deserialize(responseStream);

			if (objReturn is SoapFault)
				return soapMsgFormatter.FormatFault ((SoapFault) objReturn, mcm);
			else
				return soapMsgFormatter.FormatResponse ((ISoapMessage) objReturn, mcm);
		}

		class CallData
		{
			public CallData (IMessage msg, SoapMessageFormatter formatter)
			{
				Msg = msg;
				Formatter = formatter;
			}

			public IMessage Msg;
			public SoapMessageFormatter Formatter;
		}
	}
}