BinaryClientFormatterSink.cs :  » 2.6.4-mono-.net-core » System.Runtime » System » Runtime » Remoting » Channels » C# / CSharp Open Source

//
// System.Runtime.Remoting.Channels.BinaryClientFormatterSink.cs
//
// Author: Rodrigo Moya (rodrigo@ximian.com)
//         Dietmar Maurer (dietmar@ximian.com)
//         Lluis Sanchez Gual (lluis@ideary.com)
//
// 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.Runtime.Remoting.Messaging;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

namespace System.Runtime.Remoting.Channels{
  public class BinaryClientFormatterSink : IClientFormatterSink,
    IMessageSink, IClientChannelSink, IChannelSinkBase
  {
    BinaryCore _binaryCore = BinaryCore.DefaultInstance;
    IClientChannelSink _nextInChain;

    public BinaryClientFormatterSink (IClientChannelSink nextSink)
    {
      _nextInChain = nextSink;
    }

    internal BinaryCore BinaryCore
    {
      get { return _binaryCore; }
      set { _binaryCore = value; }
    }

    public IClientChannelSink NextChannelSink
    {
      get {
        return _nextInChain;
      }
    }

    public IMessageSink NextSink
    {
      get {
        // This is the last sink in the IMessageSink sink chain
        return null;
      }
    }

    public IDictionary Properties
    {
      get {
        return null;
      }
    }

    public void AsyncProcessRequest (IClientChannelSinkStack sinkStack,
             IMessage msg,
             ITransportHeaders headers,
             Stream stream)
          {
      // never called because the formatter sink is
      // always the first in the chain
      throw new NotSupportedException("BinaryClientFormatterSink must be the first sink in the IClientChannelSink chain");
    }

    public void AsyncProcessResponse (IClientResponseChannelSinkStack sinkStack,
              object state,
              ITransportHeaders headers,
              Stream stream)
    {
      IMessage replyMessage = (IMessage)_binaryCore.Deserializer.DeserializeMethodResponse (stream, null, (IMethodCallMessage)state);
      sinkStack.DispatchReplyMessage (replyMessage);
    }

    public Stream GetRequestStream (IMessage msg,
            ITransportHeaders headers)
    {
      // never called
      throw new NotSupportedException ();
    }

    public void ProcessMessage (IMessage msg,
              ITransportHeaders requestHeaders,
              Stream requestStream,
              out ITransportHeaders responseHeaders,
              out Stream responseStream)
    {
      // never called because the formatter sink is
      // always the first in the chain
      throw new NotSupportedException ();
    }

    public IMessageCtrl AsyncProcessMessage (IMessage msg,
      IMessageSink replySink)
    {
      ITransportHeaders transportHeaders = new TransportHeaders();
      transportHeaders[CommonTransportKeys.RequestUri] = ((IMethodCallMessage)msg).Uri;
      transportHeaders["Content-Type"] = "application/octet-stream";

      Stream stream = _nextInChain.GetRequestStream(msg, transportHeaders);
      if (stream == null) stream = new MemoryStream ();

      _binaryCore.Serializer.Serialize (stream, msg, null);
      if (stream is MemoryStream) stream.Position = 0;

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

      _nextInChain.AsyncProcessRequest (stack, msg, transportHeaders, stream);

      // FIXME: No idea about how to implement IMessageCtrl
      return null;  
    }

    public IMessage SyncProcessMessage (IMessage msg)
    {
      try {

        ITransportHeaders call_headers = new TransportHeaders();
        call_headers[CommonTransportKeys.RequestUri] = ((IMethodCallMessage)msg).Uri;
        call_headers["Content-Type"] = "application/octet-stream";

        Stream call_stream = _nextInChain.GetRequestStream(msg, call_headers);
        if (call_stream == null) call_stream = new MemoryStream ();

        // Serialize msg to the stream

        _binaryCore.Serializer.Serialize (call_stream, msg, null);
        if (call_stream is MemoryStream) call_stream.Position = 0;

        Stream response_stream;
        ITransportHeaders response_headers;

        _nextInChain.ProcessMessage (msg, call_headers, call_stream, out response_headers,
                  out response_stream);

        // Deserialize response_stream

        return (IMessage) _binaryCore.Deserializer.DeserializeMethodResponse (response_stream, null, (IMethodCallMessage)msg);
        
      } catch (Exception e) {
         return new ReturnMessage (e, (IMethodCallMessage)msg);
      }
    }
  }
}