mono/mcs/class/System.Runtime.Remoting/System.Runtime.Remoting.Channels/SoapServerFormatterSink.cs

//
// System.Runtime.Remoting.Channels.SoapServerFormatterSink.cs
//
// Authors: 	Duncan Mak ([email protected])
// 		Jean-Marc Andre ([email protected])
//
// 2002 (C) Copyright, Ximian, Inc.
//

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;
using System.Runtime.InteropServices;


namespace System.Runtime.Remoting.Channels {

	/// <summary>
	//	The formatter sink that uses SoapFormatter
	/// </summary>
	// <remarks>
	// 	The formatter sink deserializes the message from the channel sink
	// 	and passes the result to the remoting infrastructure
	// </remark>
	// 	
	public class SoapServerFormatterSink : IServerChannelSink, IChannelSinkBase
	{
		IServerChannelSink next_sink;
		IChannelReceiver _receiver;
		private SoapCore _soapCore = SoapCore.DefaultInstance;
		
		public SoapServerFormatterSink (SoapServerFormatterSink.Protocol protocol,
						IServerChannelSink nextSink,
						IChannelReceiver receiver)
		{
			this.next_sink = nextSink;
			_receiver = receiver;
		}

		internal SoapCore SoapCore
		{
			get { return _soapCore; }
			set { _soapCore = value; }
		}
		
		/// <summary>
		//	Gets the next channel sink in the channel sink chain
		//  </summary>
		/// <value>
		//	The next channel sink in the sink chain
		//  </value>
		public IServerChannelSink NextChannelSink {
			get {
				return next_sink;
			}
		}

		public IDictionary Properties {
			get {
				return null;
			}
		}

#if NET_1_1
		[ComVisible(false)]
		public TypeFilterLevel TypeFilterLevel
		{
			get { return _soapCore.TypeFilterLevel; }
			set 
			{
				IDictionary props = (IDictionary) ((ICloneable)_soapCore.Properties).Clone ();
				props ["typeFilterLevel"] = value;
				_soapCore = new SoapCore (this, props, SoapServerFormatterSinkProvider.AllowedProperties);
			}
		}
#endif

		public void AsyncProcessResponse (IServerResponseChannelSinkStack sinkStack, object state,
						  IMessage msg, ITransportHeaders headers, Stream stream)
						  
		{
			ITransportHeaders responseHeaders = new TransportHeaders();

			if(sinkStack != null) stream = sinkStack.GetResponseStream(msg, responseHeaders);
			if(stream == null) stream = new MemoryStream();

			SoapMessageFormatter soapMsgFormatter = (SoapMessageFormatter)state;

			SoapMessage soapMessage = (SoapMessage) soapMsgFormatter.BuildSoapMessageFromMethodResponse((IMethodReturnMessage)msg, out responseHeaders);

			_soapCore.Serializer.Serialize(stream, soapMessage, null);

			if(stream is MemoryStream) stream.Position = 0;
			sinkStack.AsyncProcessResponse (msg, responseHeaders, stream);
		}

		public Stream GetResponseStream (IServerResponseChannelSinkStack sinkStack, object state,
						IMessage msg, ITransportHeaders headers)
		{
			// this method shouldn't be called
			throw new NotSupportedException ();
		}
		
		public ServerProcessing ProcessMessage (IServerChannelSinkStack sinkStack,
							IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream,
							out IMessage responseMsg, out ITransportHeaders responseHeaders, out Stream responseStream)
		{
			responseMsg = null;
			responseHeaders = null;
			responseStream = null;

			Exception exception;
			ServerProcessing sp;
			SoapMessageFormatter soapMsgFormatter = new SoapMessageFormatter();
			sinkStack.Push(this, soapMsgFormatter);

			try {
				string url = (string)requestHeaders[CommonTransportKeys.RequestUri];
				string uri;
				_receiver.Parse(url, out uri);
				if(uri == null)	uri = url;
				Type serverType = RemotingServices.GetServerTypeForUri(uri);
				if (serverType == null) throw new RemotingException ("No receiver for uri " + uri);
			
				SoapFormatter fm = _soapCore.GetSafeDeserializer ();
				SoapMessage soapMessage = soapMsgFormatter.CreateSoapMessage (true);
				fm.TopObject = soapMessage;
				requestStream.Position = 0;
				fm.Deserialize(requestStream);

				requestMsg = soapMsgFormatter.BuildMethodCallFromSoapMessage(soapMessage, uri);
				
				sp = next_sink.ProcessMessage(sinkStack, requestMsg, requestHeaders, null, out responseMsg, out responseHeaders, out responseStream);
				
				if(sp == ServerProcessing.Complete) {
					if(responseMsg != null && responseStream == null) {

						object rtnMessageObject = soapMsgFormatter.BuildSoapMessageFromMethodResponse((IMethodReturnMessage) responseMsg, out responseHeaders);
						responseStream = new MemoryStream();
						_soapCore.Serializer.Serialize(responseStream, rtnMessageObject);
					}
				}
			}
			catch(Exception e)
			{
				responseMsg = (IMethodReturnMessage)new ReturnMessage(e, (IMethodCallMessage)requestMsg);
				object rtnMessageObject = soapMsgFormatter.BuildSoapMessageFromMethodResponse((IMethodReturnMessage) responseMsg, out responseHeaders);
				responseStream = new MemoryStream();
				_soapCore.Serializer.Serialize(responseStream, rtnMessageObject);
				sp = ServerProcessing.Complete;
			}

			if (sp == ServerProcessing.Complete)
				sinkStack.Pop(this);

			return sp;
			
		}

		private object HH(Header[] headers) {
			foreach(Header h in headers) {
				Console.WriteLine("Name: {0} Value:{0}", h.Name, h.Value);
			}
			return null;
		}
		
		[Serializable]
		public enum Protocol
		{
			Http = 0,
			Other = 1,
		}
	}

}