class/System.Runtime.Remoting/System.Runtime.Remoting.Channels.Tcp/TcpServerTransportSink.cs

   1 //
   2 // System.Runtime.Remoting.Channels.Tcp.TcpServerTransportSink.cs
   3 //
   4 // Author: Rodrigo Moya (rodrigo@ximian.com)
   5 //         Lluis Sanchez Gual (lsg@ctv.es)
   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.Runtime.Remoting.Messaging;
  34 using System.Net.Sockets;
  35 using System.IO;
  36
  37 namespace System.Runtime.Remoting.Channels.Tcp
  38 {
  39         internal class TcpServerTransportSink : IServerChannelSink, IChannelSinkBase
  40         {
  41                 IServerChannelSink next_sink;
  42
  43                 public TcpServerTransportSink (IServerChannelSink next)
  44                 {
  45                         next_sink = next;
  46                 }
  47
  48                 public IServerChannelSink NextChannelSink
  49                 {
  50                         get
  51                         {
  52                                 return next_sink;
  53                         }
  54                 }
  55
  56                 public IDictionary Properties
  57                 {
  58                         get
  59                         {
  60                                 if (next_sink != null) return next_sink.Properties;
  61                                 else return null;
  62                         }
  63                 }
  64
  65                 public void AsyncProcessResponse (IServerResponseChannelSinkStack sinkStack, object state,
  66                         IMessage msg, ITransportHeaders headers, Stream responseStream)
  67                 {
  68                         ClientConnection connection = (ClientConnection)state;
  69
  70                         NetworkStream ns = new NetworkStream (connection.Socket);
  71                         TcpMessageIO.SendMessageStream (ns, responseStream, headers, connection.Buffer);
  72                         ns.Flush ();
  73                         ns.Close ();
  74                 }
  75
  76                 public Stream GetResponseStream (IServerResponseChannelSinkStack sinkStack, object state,
  77                         IMessage msg, ITransportHeaders headers)
  78                 {
  79                         return null;
  80                 }
  81
  82                 public ServerProcessing ProcessMessage (IServerChannelSinkStack sinkStack,
  83                         IMessage requestMsg,
  84                         ITransportHeaders requestHeaders,
  85                         Stream requestStream,
  86                         out IMessage responseMsg,
  87                         out ITransportHeaders responseHeaders,
  88                         out Stream responseStream)
  89                 {
  90                         // this is the first sink, and TcpServerChannel does not call it.
  91                         throw new NotSupportedException ();
  92                 }
  93
  94                 internal void InternalProcessMessage (ClientConnection connection, Stream stream)
  95                 {
  96                         // Reads the headers and the request stream
  97
  98                         Stream requestStream;
  99                         ITransportHeaders requestHeaders;
 100
 101                         requestStream = TcpMessageIO.ReceiveMessageStream (stream, out requestHeaders, connection.Buffer);
 102                         requestHeaders [CommonTransportKeys.IPAddress] = connection.ClientAddress;
 103                         requestHeaders [CommonTransportKeys.ConnectionId] = connection.Id;
 104
 105                         string uri = (string) requestHeaders [CommonTransportKeys.RequestUri];
 106                         TcpChannel.ParseChannelUrl (uri, out uri);
 107
 108                         if (uri != null)
 109                                 requestHeaders [CommonTransportKeys.RequestUri] = uri;
 110
 111                         // Pushes the connection object together with the sink. This information
 112                         // will be used for sending the response in an async call.
 113
 114                         ServerChannelSinkStack sinkStack = new ServerChannelSinkStack();
 115                         sinkStack.Push(this, connection);
 116
 117                         ITransportHeaders responseHeaders;
 118                         Stream responseStream;
 119                         IMessage responseMsg;
 120
 121                         ServerProcessing proc = next_sink.ProcessMessage(sinkStack, null, requestHeaders, requestStream, out responseMsg, out responseHeaders, out responseStream);
 122
 123                         switch (proc)
 124                         {
 125                                 case ServerProcessing.Complete:
 126                                         TcpMessageIO.SendMessageStream (stream, responseStream, responseHeaders, connection.Buffer);
 127                                         stream.Flush ();
 128                                         break;
 129
 130                                 case ServerProcessing.Async:
 131                                 case ServerProcessing.OneWay:
 132                                         break;
 133                         }
 134                 }
 135         }
 136 }
 137