mcs/class/System.ServiceModel/System.ServiceModel.Channels/HttpRequestChannel.cs

   1 //
   2 // HttpRequestChannel.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2006 Novell, Inc.  http://www.novell.com
   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 using System;
  29 using System.Collections.Generic;
  30 using System.IO;
  31 using System.Net;
  32 using System.Net.Security;
  33 using System.ServiceModel;
  34 using System.ServiceModel.Description;
  35 using System.ServiceModel.Security;
  36 using System.Threading;
  37
  38 namespace System.ServiceModel.Channels
  39 {
  40         internal class HttpRequestChannel : RequestChannelBase
  41         {
  42                 HttpChannelFactory<IRequestChannel> source;
  43
  44                 WebRequest web_request;
  45
  46                 // FIXME: supply maxSizeOfHeaders.
  47                 int max_headers = 0x10000;
  48
  49                 // Constructor
  50
  51                 public HttpRequestChannel (HttpChannelFactory<IRequestChannel> factory,
  52                         EndpointAddress address, Uri via)
  53                         : base (factory, address, via)
  54                 {
  55                         this.source = factory;
  56                 }
  57
  58                 public int MaxSizeOfHeaders {
  59                         get { return max_headers; }
  60                 }
  61
  62                 public MessageEncoder Encoder {
  63                         get { return source.MessageEncoder; }
  64                 }
  65
  66                 // Request
  67
  68                 public override Message Request (Message message, TimeSpan timeout)
  69                 {
  70                         return EndRequest (BeginRequest (message, timeout, null, null));
  71                 }
  72
  73                 void BeginProcessRequest (HttpChannelRequestAsyncResult result)
  74                 {
  75                         Message message = result.Message;
  76                         TimeSpan timeout = result.Timeout;
  77                         // FIXME: is distination really like this?
  78                         Uri destination = message.Headers.To;
  79                         if (destination == null) {
  80                                 if (source.Source.ManualAddressing)
  81                                         throw new InvalidOperationException ("When manual addressing is enabled on the transport, every request messages must be set its destination address.");
  82                                  else
  83                                         destination = Via ?? RemoteAddress.Uri;
  84                         }
  85
  86                         web_request = HttpWebRequest.Create (destination);
  87                         web_request.Method = "POST";
  88                         web_request.ContentType = Encoder.ContentType;
  89
  90 #if !NET_2_1 // FIXME: implement this to not depend on Timeout property
  91                         web_request.Timeout = (int) timeout.TotalMilliseconds;
  92 #endif
  93
  94                         // There is no SOAP Action/To header when AddressingVersion is None.
  95                         if (message.Version.Envelope.Equals (EnvelopeVersion.Soap11) ||
  96                             message.Version.Addressing.Equals (AddressingVersion.None)) {
  97                                 if (message.Headers.Action != null) {
  98                                         web_request.Headers ["SOAPAction"] = String.Concat ("\"", message.Headers.Action, "\"");
  99                                         message.Headers.RemoveAll ("Action", message.Version.Addressing.Namespace);
 100                                 }
 101                         }
 102
 103                         // apply HttpRequestMessageProperty if exists.
 104                         bool suppressEntityBody = false;
 105 #if !NET_2_1
 106                         string pname = HttpRequestMessageProperty.Name;
 107                         if (message.Properties.ContainsKey (pname)) {
 108                                 HttpRequestMessageProperty hp = (HttpRequestMessageProperty) message.Properties [pname];
 109                                 web_request.Headers.Add (hp.Headers);
 110                                 web_request.Method = hp.Method;
 111                                 // FIXME: do we have to handle hp.QueryString ?
 112                                 if (hp.SuppressEntityBody)
 113                                         suppressEntityBody = true;
 114                         }
 115 #endif
 116
 117                         if (!suppressEntityBody && String.Compare (web_request.Method, "GET", StringComparison.OrdinalIgnoreCase) != 0) {
 118                                 MemoryStream buffer = new MemoryStream ();
 119                                 Encoder.WriteMessage (message, buffer);
 120
 121                                 if (buffer.Length > int.MaxValue)
 122                                         throw new InvalidOperationException ("The argument message is too large.");
 123
 124 #if !NET_2_1
 125                                 web_request.ContentLength = (int) buffer.Length;
 126 #endif
 127
 128                                 web_request.BeginGetRequestStream (delegate (IAsyncResult r) {
 129                                         try {
 130                                                 result.CompletedSynchronously &= r.CompletedSynchronously;
 131                                                 using (Stream s = web_request.EndGetRequestStream (r))
 132                                                         s.Write (buffer.GetBuffer (), 0, (int) buffer.Length);
 133                                                 web_request.BeginGetResponse (GotResponse, result);
 134                                         } catch (Exception ex) {
 135                                                 result.Complete (ex);
 136                                         }
 137                                 }, null);
 138                         } else {
 139                                 web_request.BeginGetResponse (GotResponse, result);
 140                         }
 141                 }
 142
 143                 void GotResponse (IAsyncResult result)
 144                 {
 145                         HttpChannelRequestAsyncResult channelResult = (HttpChannelRequestAsyncResult) result.AsyncState;
 146                         channelResult.CompletedSynchronously &= result.CompletedSynchronously;
 147
 148                         WebResponse res;
 149                         Stream resstr;
 150                         try {
 151                                 res = web_request.EndGetResponse (result);
 152                                 resstr = res.GetResponseStream ();
 153                         } catch (WebException we) {
 154                                 res = we.Response;
 155 #if NET_2_1 // debug
 156                                 Console.WriteLine (we);
 157 #endif
 158                                 try {
 159                                         // The response might contain SOAP fault. It might not.
 160                                         resstr = res.GetResponseStream ();
 161                                 } catch (WebException we2) {
 162 #if NET_2_1 // debug
 163                                         Console.WriteLine (we2);
 164 #endif
 165
 166                                         channelResult.Complete (we2);
 167                                         return;
 168                                 }
 169                         }
 170
 171                         try {
 172                                 using (var responseStream = resstr) {
 173                                         MemoryStream ms = new MemoryStream ();
 174                                         byte [] b = new byte [65536];
 175                                         int n = 0;
 176
 177                                         while (true) {
 178                                                 n = responseStream.Read (b, 0, 65536);
 179                                                 if (n == 0)
 180                                                         break;
 181                                                 ms.Write (b, 0, n);
 182                                         }
 183                                         ms.Seek (0, SeekOrigin.Begin);
 184
 185                                         channelResult.Response = Encoder.ReadMessage (
 186                                                 //responseStream, MaxSizeOfHeaders);
 187                                                 ms, MaxSizeOfHeaders, res.ContentType);
 188 /*
 189 MessageBuffer buf = ret.CreateBufferedCopy (0x10000);
 190 ret = buf.CreateMessage ();
 191 System.Xml.XmlTextWriter w = new System.Xml.XmlTextWriter (Console.Out);
 192 w.Formatting = System.Xml.Formatting.Indented;
 193 buf.CreateMessage ().WriteMessage (w);
 194 w.Close ();
 195 */
 196                                         channelResult.Complete ();
 197                                 }
 198                         } catch (Exception ex) {
 199                                 channelResult.Complete (ex);
 200                         } finally {
 201                                 res.Close ();
 202                         }
 203                 }
 204
 205                 public override IAsyncResult BeginRequest (Message message, TimeSpan timeout, AsyncCallback callback, object state)
 206                 {
 207                         ThrowIfDisposedOrNotOpen ();
 208
 209                         HttpChannelRequestAsyncResult result = new HttpChannelRequestAsyncResult (message, timeout, callback, state);
 210                         BeginProcessRequest (result);
 211                         return result;
 212                 }
 213
 214                 public override Message EndRequest (IAsyncResult result)
 215                 {
 216                         if (result == null)
 217                                 throw new ArgumentNullException ("result");
 218                         HttpChannelRequestAsyncResult r = result as HttpChannelRequestAsyncResult;
 219                         if (r == null)
 220                                 throw new InvalidOperationException ("Wrong IAsyncResult");
 221                         r.WaitEnd ();
 222                         return r.Response;
 223                 }
 224
 225                 // Abort
 226
 227                 protected override void OnAbort ()
 228                 {
 229                         if (web_request != null)
 230                                 web_request.Abort ();
 231                         web_request = null;
 232                 }
 233
 234                 // Close
 235
 236                 protected override void OnClose (TimeSpan timeout)
 237                 {
 238                         if (web_request != null)
 239                                 web_request.Abort ();
 240                         web_request = null;
 241                 }
 242
 243                 protected override IAsyncResult OnBeginClose (TimeSpan timeout, AsyncCallback callback, object state)
 244                 {
 245                         throw new NotImplementedException ();
 246                 }
 247
 248                 protected override void OnEndClose (IAsyncResult result)
 249                 {
 250                         throw new NotImplementedException ();
 251                 }
 252
 253                 // Open
 254
 255                 protected override void OnOpen (TimeSpan timeout)
 256                 {
 257                 }
 258
 259                 protected override IAsyncResult OnBeginOpen (TimeSpan timeout, AsyncCallback callback, object state)
 260                 {
 261                         throw new NotImplementedException ();
 262                 }
 263
 264                 protected override void OnEndOpen (IAsyncResult result)
 265                 {
 266                         throw new NotImplementedException ();
 267                 }
 268
 269                 class HttpChannelRequestAsyncResult : IAsyncResult
 270                 {
 271                         public Message Message {
 272                                 get; private set;
 273                         }
 274
 275                         public TimeSpan Timeout {
 276                                 get; private set;
 277                         }
 278
 279                         AsyncCallback callback;
 280                         ManualResetEvent wait;
 281                         Exception error;
 282
 283                         public HttpChannelRequestAsyncResult (Message message, TimeSpan timeout, AsyncCallback callback, object state)
 284                         {
 285                                 CompletedSynchronously = true;
 286                                 Message = message;
 287                                 Timeout = timeout;
 288                                 this.callback = callback;
 289                                 AsyncState = state;
 290
 291                                 wait = new ManualResetEvent (false);
 292                         }
 293
 294                         public Message Response {
 295                                 get; set;
 296                         }
 297
 298                         public WaitHandle AsyncWaitHandle {
 299                                 get { return wait; }
 300                         }
 301
 302                         public object AsyncState {
 303                                 get; private set;
 304                         }
 305
 306                         public void Complete ()
 307                         {
 308                                 Complete (null);
 309                         }
 310
 311                         public void Complete (Exception ex)
 312                         {
 313                                 if (IsCompleted) {
 314                                         return;
 315                                 }
 316                                 // If we've already stored an error, don't replace it
 317                                 error = error ?? ex;
 318
 319                                 IsCompleted = true;
 320                                 wait.Set ();
 321                                 if (callback != null)
 322                                         callback (this);
 323                         }
 324
 325                         public bool CompletedSynchronously {
 326                                 get; set;
 327                         }
 328
 329                         public bool IsCompleted {
 330                                 get; private set;
 331                         }
 332
 333                         public void WaitEnd ()
 334                         {
 335                                 if (!IsCompleted) {
 336
 337                                         const bool exit_context =
 338 #if MONOTOUCH
 339                                                 false; // MonoTouch doesn't support any remoting feature
 340 #else
 341                                                 true;
 342 #endif
 343
 344                                         // FIXME: Do we need to use the timeout? If so, what happens when the timeout is reached.
 345                                         // Is the current request cancelled and an exception thrown? If so we need to pass the
 346                                         // exception to the Complete () method and allow the result to complete 'normally'.
 347                                         if (!wait.WaitOne (Timeout, exit_context))
 348                                                 throw new TimeoutException ();
 349                                 }
 350                                 if (error != null)
 351                                         throw error;
 352                         }
 353                 }
 354         }
 355 }