mcs/class/Mono.Posix/Mono.Remoting.Channels.Unix/UnixBinaryServerFormatterSink.cs

   1 //
   2 // Mono.Remoting.Channels.Unix.UnixBinaryServerFormatterSink.cs
   3 //
   4 // Author: Duncan Mak (duncan@ximian.com)
   5 //         Lluis Sanchez Gual (lluis@ideary.com)
   6 //
   7 // 2002 (C) Copyright, Ximian, Inc.
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.Collections;
  33 using System.IO;
  34 using System.Runtime.Remoting.Messaging;
  35 using System.Runtime.Remoting.Channels;
  36 using System.Runtime.Serialization;
  37 using System.Runtime.Serialization.Formatters;
  38 using System.Runtime.Serialization.Formatters.Binary;
  39 using System.Runtime.InteropServices;
  40
  41 namespace Mono.Remoting.Channels.Unix {
  42
  43         internal class UnixBinaryServerFormatterSink : IServerChannelSink, IChannelSinkBase
  44         {
  45                 UnixBinaryCore _binaryCore = UnixBinaryCore.DefaultInstance;
  46
  47                 IServerChannelSink next_sink;
  48                 IChannelReceiver receiver;
  49
  50                 public UnixBinaryServerFormatterSink (IServerChannelSink nextSink, IChannelReceiver receiver)
  51                 {
  52                         this.next_sink = nextSink;
  53                         this.receiver = receiver;
  54                 }
  55
  56                 internal UnixBinaryCore BinaryCore
  57                 {
  58                         get { return _binaryCore; }
  59                         set { _binaryCore = value; }
  60                 }
  61
  62                 public IServerChannelSink NextChannelSink {
  63                         get {
  64                                 return next_sink;
  65                         }
  66                 }
  67
  68                 public IDictionary Properties {
  69                         get {
  70                                 return null;
  71                         }
  72                 }
  73
  74                 public void AsyncProcessResponse (IServerResponseChannelSinkStack sinkStack, object state,
  75                                                   IMessage message, ITransportHeaders headers, Stream stream)
  76                 {
  77                         ITransportHeaders responseHeaders = new TransportHeaders();
  78
  79                         if (sinkStack != null) stream = sinkStack.GetResponseStream (message, responseHeaders);
  80                         if (stream == null) stream = new MemoryStream();
  81
  82                         _binaryCore.Serializer.Serialize (stream, message, null);
  83                         if (stream is MemoryStream) stream.Position = 0;
  84
  85                         sinkStack.AsyncProcessResponse (message, responseHeaders, stream);
  86                 }
  87
  88                 public Stream GetResponseStream (IServerResponseChannelSinkStack sinkStack, object state,
  89                                                 IMessage msg, ITransportHeaders headers)
  90                 {
  91                         return null;
  92                 }
  93
  94                 public ServerProcessing ProcessMessage (IServerChannelSinkStack sinkStack,
  95                                                         IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream,
  96                                                         out IMessage responseMsg, out ITransportHeaders responseHeaders, out Stream responseStream)
  97                 {
  98                         sinkStack.Push (this, null);
  99                         ServerProcessing res;
 100
 101                         try
 102                         {
 103                                 string url = (string)requestHeaders["__RequestUri"];
 104                                 string uri;
 105                                 receiver.Parse (url, out uri);
 106                                 if (uri == null) uri = url;
 107
 108                                 MethodCallHeaderHandler mhh = new MethodCallHeaderHandler(uri);
 109                                 requestMsg = (IMessage) _binaryCore.Deserializer.Deserialize (requestStream, new HeaderHandler(mhh.HandleHeaders));
 110
 111                                 res = next_sink.ProcessMessage (sinkStack, requestMsg, requestHeaders, null, out responseMsg, out responseHeaders, out responseStream);
 112                         }
 113                         catch (Exception ex)
 114                         {
 115                                 responseMsg = new ReturnMessage (ex, (IMethodCallMessage)requestMsg);
 116                                 res = ServerProcessing.Complete;
 117                                 responseHeaders = null;
 118                                 responseStream = null;
 119                         }
 120
 121                         if (res == ServerProcessing.Complete)
 122                         {
 123                                 for (int n=0; n<3; n++) {
 124                                         responseStream = null;
 125                                         responseHeaders = new TransportHeaders();
 126
 127                                         if (sinkStack != null) responseStream = sinkStack.GetResponseStream (responseMsg, responseHeaders);
 128                                         if (responseStream == null) responseStream = new MemoryStream();
 129
 130                                         try {
 131                                                 _binaryCore.Serializer.Serialize (responseStream, responseMsg);
 132                                                 break;
 133                                         } catch (Exception ex) {
 134                                                 if (n == 2) throw ex;
 135                                                 else responseMsg = new ReturnMessage (ex, (IMethodCallMessage)requestMsg);
 136                                         }
 137                                 }
 138
 139                                 if (responseStream is MemoryStream) responseStream.Position = 0;
 140
 141
 142                                 sinkStack.Pop (this);
 143                         }
 144                         return res;
 145                 }
 146
 147         }
 148
 149         internal class MethodCallHeaderHandler
 150         {
 151                 string _uri;
 152
 153                 public MethodCallHeaderHandler (string uri)
 154                 {
 155                         _uri = uri;
 156                 }
 157
 158                 public object HandleHeaders (Header[] headers)
 159                 {
 160                         return _uri;
 161                 }
 162         }
 163 }