class/System.Runtime.Remoting/System.Runtime.Remoting.Channels.Ipc.Win32/IpcClientChannel.cs

   1 //
   2 // System.Runtime.Remoting.Channels.Ipc.Win32.IpcClientChannel.cs
   3 //
   4 // Author: Robert Jordan (robertj@gmx.net)
   5 //
   6 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   7 //
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30
  31 using System;
  32 using System.Collections;
  33 using System.IO;
  34 using System.Runtime.Remoting;
  35 using System.Runtime.Remoting.Channels;
  36 using System.Runtime.Remoting.Messaging;
  37
  38 namespace System.Runtime.Remoting.Channels.Ipc.Win32
  39 {
  40     internal class IpcClientChannel : IChannelSender, IChannel
  41     {
  42         readonly string channelName = IpcChannelHelper.Scheme;
  43         readonly int channelPriority = 1;
  44         readonly IClientChannelSinkProvider clientProvider;
  45
  46         /// <summary>
  47         /// Creates a default client channel.
  48         /// </summary>
  49         public IpcClientChannel()
  50             : this ((IDictionary)null, null)
  51         {
  52         }
  53
  54         /// <summary>
  55         /// Creates a default client channel.
  56         /// </summary>
  57         /// <param name="name">The channel name.</param>
  58         /// <param name="sinkProvider">The provider</param>
  59         public IpcClientChannel(string name, IClientChannelSinkProvider provider)
  60             : this (IpcServerChannel.BuildDefaultProperties (name), provider)
  61         {
  62         }
  63
  64         /// <summary>
  65         /// Creates a client channel.
  66         /// </summary>
  67         /// <param name="properties">The properties.</param>
  68         /// <param name="sinkProvider">The provider</param>
  69         public IpcClientChannel(IDictionary properties, IClientChannelSinkProvider provider)
  70         {
  71             if (properties != null)
  72             {
  73                 foreach (DictionaryEntry e in properties)
  74                 {
  75                     switch ((string)e.Key)
  76                     {
  77                         case "name":
  78                             channelName = (string)e.Value;
  79                             break;
  80                         case "priority":
  81                             channelPriority = Convert.ToInt32(e.Value);
  82                             break;
  83                     }
  84                 }
  85             }
  86
  87             if (provider == null)
  88             {
  89                 clientProvider = new BinaryClientFormatterSinkProvider();
  90                 clientProvider.Next = new IpcClientChannelSinkProvider();
  91             }
  92             else
  93             {
  94                 // add us to the sink chain.
  95                 clientProvider = provider;
  96                 IClientChannelSinkProvider p;
  97                 for (p = clientProvider; p.Next != null; p = p.Next) {}
  98                 p.Next = new IpcClientChannelSinkProvider();
  99             }
 100
 101         }
 102
 103         #region IChannelSender Members
 104
 105         public IMessageSink CreateMessageSink(string url, object remoteChannelData, out string objectURI)
 106         {
 107             objectURI = null;
 108             string channelUri = null;
 109
 110             if (url != null)
 111             {
 112                 channelUri = Parse(url, out objectURI);
 113             }
 114
 115             if (channelUri == null)
 116             {
 117                 // get url from the channel data
 118                 IChannelDataStore ds = remoteChannelData as IChannelDataStore;
 119                 if (ds != null)
 120                 {
 121                     channelUri = Parse(ds.ChannelUris[0], out objectURI);
 122                     if (channelUri != null)
 123                         url = ds.ChannelUris[0];
 124                 }
 125             }
 126
 127             if (channelUri != null)
 128             {
 129                 return (IMessageSink) clientProvider.CreateSink(this, url, remoteChannelData);
 130             }
 131             else
 132             {
 133                 return null;
 134             }
 135         }
 136
 137         #endregion
 138
 139         #region IChannel Members
 140
 141         public string ChannelName
 142         {
 143             get
 144             {
 145                 return channelName;
 146             }
 147         }
 148
 149         public int ChannelPriority
 150         {
 151             get
 152             {
 153                 return channelPriority;
 154             }
 155         }
 156
 157         public string Parse(string url, out string objectURI)
 158         {
 159             return IpcChannelHelper.Parse(url, out objectURI);
 160         }
 161
 162         #endregion
 163     }
 164
 165     internal class IpcClientChannelSinkProvider : IClientChannelSinkProvider
 166     {
 167         #region IClientChannelSinkProvider Members
 168
 169         public IClientChannelSink CreateSink(IChannelSender channel, string url, object remoteChannelData)
 170         {
 171             return new IpcClientChannelSink(url);
 172         }
 173
 174         public IClientChannelSinkProvider Next
 175         {
 176             get
 177             {
 178                 return null;
 179             }
 180             set
 181             {
 182                 throw new NotSupportedException();
 183             }
 184         }
 185
 186         #endregion
 187     }
 188
 189     internal class IpcClientChannelSink : IClientChannelSink
 190     {
 191         readonly string pipeName;
 192
 193         public IpcClientChannelSink(string url)
 194         {
 195             string unused;
 196             IpcChannelHelper.Parse(url, out pipeName, out unused);
 197         }
 198
 199         #region IClientChannelSink Members
 200
 201         delegate void AsyncResponse(IClientChannelSinkStack sinkStack, IpcTransport transport);
 202
 203         public void AsyncProcessRequest(IClientChannelSinkStack sinkStack, IMessage msg, ITransportHeaders headers, Stream stream)
 204         {
 205             headers[CommonTransportKeys.RequestUri] = ((IMethodCallMessage)msg).Uri;
 206
 207             // connect
 208             NamedPipeClient client = new NamedPipeClient(pipeName);
 209             NamedPipeSocket socket = client.Connect();
 210             IpcTransport t = new IpcTransport(socket);
 211             t.Write(headers, stream);
 212
 213             // schedule an async call
 214             if (!RemotingServices.IsOneWay(((IMethodCallMessage)msg).MethodBase))
 215             {
 216                 new AsyncResponse(AsyncHandler).BeginInvoke(sinkStack, t, null, null);
 217             }
 218         }
 219
 220         void AsyncHandler(IClientChannelSinkStack sinkStack, IpcTransport transport)
 221         {
 222             try
 223             {
 224                 // get the response headers and the response stream from the server
 225                 ITransportHeaders responseHeaders;
 226                 Stream responseStream;
 227                 transport.Read(out responseHeaders, out responseStream);
 228                 transport.Close();
 229                 sinkStack.AsyncProcessResponse(responseHeaders, responseStream);
 230             }
 231             catch (Exception ex)
 232             {
 233                 sinkStack.DispatchException(ex);
 234             }
 235         }
 236
 237         public void ProcessMessage(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream, out ITransportHeaders responseHeaders, out Stream responseStream)
 238         {
 239             responseHeaders = null;
 240             responseStream = null;
 241
 242             requestHeaders[CommonTransportKeys.RequestUri] = ((IMethodCallMessage)msg).Uri;
 243
 244             // connect
 245             NamedPipeClient client = new NamedPipeClient(pipeName);
 246             NamedPipeSocket socket = client.Connect();
 247             IpcTransport t = new IpcTransport(socket);
 248             t.Write(requestHeaders, requestStream);
 249             t.Read(out responseHeaders, out responseStream);
 250             t.Close();
 251         }
 252
 253         public void AsyncProcessResponse(IClientResponseChannelSinkStack sinkStack, object state, ITransportHeaders headers, Stream stream)
 254         {
 255             throw new NotSupportedException();
 256         }
 257
 258         public Stream GetRequestStream(IMessage msg, ITransportHeaders headers)
 259         {
 260             return null;
 261         }
 262
 263         public IClientChannelSink NextChannelSink
 264         {
 265             get { return null; }
 266         }
 267
 268         #endregion
 269
 270         #region IChannelSinkBase Members
 271
 272         public IDictionary Properties
 273         {
 274             get { return null; }
 275         }
 276
 277         #endregion
 278
 279     }
 280
 281 }
 282
 283 #endif