mcs/class/System.Runtime.Remoting/System.Runtime.Remoting.Channels/BinaryServerFormatterSink.cs

   1 //
   2 // System.Runtime.Remoting.Channels.BinaryServerFormatterSink.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.Collections;
  32 using System.IO;
  33 using System.Runtime.Remoting.Messaging;
  34 using System.Runtime.Serialization;
  35 using System.Runtime.Serialization.Formatters;
  36 using System.Runtime.Serialization.Formatters.Binary;
  37 using System.Runtime.InteropServices;
  38
  39 namespace System.Runtime.Remoting.Channels {
  40
  41         public class BinaryServerFormatterSink : IServerChannelSink, IChannelSinkBase
  42         {
  43                 [Serializable]
  44                 public enum Protocol
  45                 {
  46                         Http = 0,
  47                         Other = 1,
  48                 }
  49
  50                 BinaryCore _binaryCore = BinaryCore.DefaultInstance;
  51
  52                 IServerChannelSink next_sink;
  53                 Protocol protocol;
  54                 IChannelReceiver receiver;
  55
  56                 public BinaryServerFormatterSink (BinaryServerFormatterSink.Protocol protocol,
  57                                                   IServerChannelSink nextSink,
  58                                                   IChannelReceiver receiver)
  59                 {
  60                         this.protocol = protocol;
  61                         this.next_sink = nextSink;
  62                         this.receiver = receiver;
  63                 }
  64
  65                 internal BinaryCore BinaryCore
  66                 {
  67                         get { return _binaryCore; }
  68                         set { _binaryCore = value; }
  69                 }
  70
  71                 public IServerChannelSink NextChannelSink {
  72                         get {
  73                                 return next_sink;
  74                         }
  75                 }
  76
  77                 public IDictionary Properties {
  78                         get {
  79                                 return null;
  80                         }
  81                 }
  82
  83                 [ComVisible(false)]
  84                 public TypeFilterLevel TypeFilterLevel
  85                 {
  86                         get { return _binaryCore.TypeFilterLevel; }
  87                         set
  88                         {
  89                                 IDictionary props = (IDictionary) ((ICloneable)_binaryCore.Properties).Clone ();
  90                                 props ["typeFilterLevel"] = value;
  91                                 _binaryCore = new BinaryCore (this, props, BinaryServerFormatterSinkProvider.AllowedProperties);
  92                         }
  93                 }
  94
  95                 public void AsyncProcessResponse (IServerResponseChannelSinkStack sinkStack, object state,
  96                                                   IMessage msg, ITransportHeaders headers, Stream stream)
  97                 {
  98                         ITransportHeaders responseHeaders = new TransportHeaders();
  99
 100                         if (sinkStack != null) stream = sinkStack.GetResponseStream (msg, responseHeaders);
 101                         if (stream == null) stream = new MemoryStream();
 102
 103                         _binaryCore.Serializer.Serialize (stream, msg, null);
 104                         if (stream is MemoryStream) stream.Position = 0;
 105
 106                         sinkStack.AsyncProcessResponse (msg, responseHeaders, stream);
 107                 }
 108
 109                 public Stream GetResponseStream (IServerResponseChannelSinkStack sinkStack, object state,
 110                                                 IMessage msg, ITransportHeaders headers)
 111                 {
 112                         return null;
 113                 }
 114
 115                 public ServerProcessing ProcessMessage (IServerChannelSinkStack sinkStack,
 116                                                         IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream,
 117                                                         out IMessage responseMsg, out ITransportHeaders responseHeaders, out Stream responseStream)
 118                 {
 119                         // Check whether the request was already processed by another
 120                         // formatter sink and pass the request to the next sink if so.
 121                         if (requestMsg != null)
 122                                 return next_sink.ProcessMessage (sinkStack,
 123                                                                  requestMsg,
 124                                                                  requestHeaders,
 125                                                                  requestStream,
 126                                                                  out responseMsg,
 127                                                                  out responseHeaders,
 128                                                                  out responseStream);
 129
 130                         // Check whether the request is suitable for this formatter
 131                         // and pass the request to the next sink if not.
 132                         // Note that a null content-type is handled as suitable,
 133                         // otherwise no other sink will be able to handle the request.
 134                         string contentType = requestHeaders["Content-Type"] as string;
 135                         if (contentType != null && contentType != "application/octet-stream") {
 136                                 try {
 137                                         return next_sink.ProcessMessage (sinkStack,
 138                                                 requestMsg,
 139                                                 requestHeaders,
 140                                                 requestStream,
 141                                                 out responseMsg,
 142                                                 out responseHeaders,
 143                                                 out responseStream);
 144                                 } catch {
 145                                         // Let this formatter handle the exception.
 146                                 }
 147                         }
 148
 149                         sinkStack.Push (this, null);
 150                         ServerProcessing res;
 151
 152                         try
 153                         {
 154                                 string url = (string)requestHeaders[CommonTransportKeys.RequestUri];
 155                                 string uri;
 156                                 receiver.Parse (url, out uri);
 157                                 if (uri == null) uri = url;
 158
 159                                 MethodCallHeaderHandler mhh = new MethodCallHeaderHandler(uri);
 160                                 requestMsg = (IMessage) _binaryCore.Deserializer.Deserialize (requestStream, new HeaderHandler(mhh.HandleHeaders));
 161
 162                                 res = next_sink.ProcessMessage (sinkStack, requestMsg, requestHeaders, null, out responseMsg, out responseHeaders, out responseStream);
 163                         }
 164                         catch (Exception ex)
 165                         {
 166                                 responseMsg = new ReturnMessage (ex, (IMethodCallMessage)requestMsg);
 167                                 res = ServerProcessing.Complete;
 168                                 responseHeaders = null;
 169                                 responseStream = null;
 170                         }
 171
 172                         if (res == ServerProcessing.Complete)
 173                         {
 174                                 for (int n=0; n<3; n++) {
 175                                         responseStream = null;
 176                                         responseHeaders = new TransportHeaders();
 177
 178                                         if (sinkStack != null) responseStream = sinkStack.GetResponseStream (responseMsg, responseHeaders);
 179                                         if (responseStream == null) responseStream = new MemoryStream();
 180
 181                                         try {
 182                                                 _binaryCore.Serializer.Serialize (responseStream, responseMsg);
 183                                                 break;
 184                                         } catch (Exception ex) {
 185                                                 if (n == 2) throw ex;
 186                                                 else responseMsg = new ReturnMessage (ex, (IMethodCallMessage)requestMsg);
 187                                         }
 188                                 }
 189
 190                                 if (responseStream is MemoryStream) responseStream.Position = 0;
 191
 192
 193                                 sinkStack.Pop (this);
 194                         }
 195                         return res;
 196                 }
 197
 198         }
 199
 200         internal class MethodCallHeaderHandler
 201         {
 202                 string _uri;
 203
 204                 public MethodCallHeaderHandler (string uri)
 205                 {
 206                         _uri = uri;
 207                 }
 208
 209                 public object HandleHeaders (Header[] headers)
 210                 {
 211                         return _uri;
 212                 }
 213         }
 214 }