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.Transport.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
  91                         var cmgr = source.GetProperty<IHttpCookieContainerManager> ();
  92                         if (cmgr != null)
  93                                 ((HttpWebRequest) web_request).CookieContainer = cmgr.CookieContainer;
  94 #endif
  95
  96 #if !MOONLIGHT // until we support NetworkCredential like SL4 will do.
  97                         // client authentication (while SL3 has NetworkCredential class, it is not implemented yet. So, it is non-SL only.)
  98                         var httpbe = (HttpTransportBindingElement) source.Transport;
  99                         string authType = null;
 100                         switch (httpbe.AuthenticationScheme) {
 101                         // AuthenticationSchemes.Anonymous is the default, ignored.
 102                         case AuthenticationSchemes.Basic:
 103                                 authType = "Basic";
 104                                 break;
 105                         case AuthenticationSchemes.Digest:
 106                                 authType = "Digest";
 107                                 break;
 108                         case AuthenticationSchemes.Ntlm:
 109                                 authType = "Ntlm";
 110                                 break;
 111                         case AuthenticationSchemes.Negotiate:
 112                                 authType = "Negotiate";
 113                                 break;
 114                         }
 115                         if (authType != null) {
 116                                 var cred = source.ClientCredentials;
 117                                 string user = cred != null ? cred.UserName.UserName : null;
 118                                 string pwd = cred != null ? cred.UserName.Password : null;
 119                                 if (String.IsNullOrEmpty (user))
 120                                         throw new InvalidOperationException (String.Format ("Use ClientCredentials to specify a user name for required HTTP {0} authentication.", authType));
 121                                 var nc = new NetworkCredential (user, pwd);
 122                                 web_request.Credentials = nc;
 123                                 // FIXME: it is said required in SL4, but it blocks full WCF.
 124                                 //web_request.UseDefaultCredentials = false;
 125                         }
 126 #endif
 127
 128 #if !NET_2_1 // FIXME: implement this to not depend on Timeout property
 129                         web_request.Timeout = (int) timeout.TotalMilliseconds;
 130 #endif
 131
 132                         // There is no SOAP Action/To header when AddressingVersion is None.
 133                         if (message.Version.Envelope.Equals (EnvelopeVersion.Soap11) ||
 134                             message.Version.Addressing.Equals (AddressingVersion.None)) {
 135                                 if (message.Headers.Action != null) {
 136                                         web_request.Headers ["SOAPAction"] = String.Concat ("\"", message.Headers.Action, "\"");
 137                                         message.Headers.RemoveAll ("Action", message.Version.Addressing.Namespace);
 138                                 }
 139                         }
 140
 141                         // apply HttpRequestMessageProperty if exists.
 142                         bool suppressEntityBody = false;
 143 #if !NET_2_1
 144                         string pname = HttpRequestMessageProperty.Name;
 145                         if (message.Properties.ContainsKey (pname)) {
 146                                 HttpRequestMessageProperty hp = (HttpRequestMessageProperty) message.Properties [pname];
 147                                 web_request.Headers.Clear ();
 148                                 web_request.Headers.Add (hp.Headers);
 149                                 web_request.Method = hp.Method;
 150                                 // FIXME: do we have to handle hp.QueryString ?
 151                                 if (hp.SuppressEntityBody)
 152                                         suppressEntityBody = true;
 153                         }
 154 #endif
 155
 156                         if (!suppressEntityBody && String.Compare (web_request.Method, "GET", StringComparison.OrdinalIgnoreCase) != 0) {
 157                                 MemoryStream buffer = new MemoryStream ();
 158                                 Encoder.WriteMessage (message, buffer);
 159
 160                                 if (buffer.Length > int.MaxValue)
 161                                         throw new InvalidOperationException ("The argument message is too large.");
 162
 163 #if !NET_2_1
 164                                 web_request.ContentLength = (int) buffer.Length;
 165 #endif
 166
 167                                 web_request.BeginGetRequestStream (delegate (IAsyncResult r) {
 168                                         try {
 169                                                 result.CompletedSynchronously &= r.CompletedSynchronously;
 170                                                 using (Stream s = web_request.EndGetRequestStream (r))
 171                                                         s.Write (buffer.GetBuffer (), 0, (int) buffer.Length);
 172                                                 web_request.BeginGetResponse (GotResponse, result);
 173                                         } catch (Exception ex) {
 174                                                 result.Complete (ex);
 175                                         }
 176                                 }, null);
 177                         } else {
 178                                 web_request.BeginGetResponse (GotResponse, result);
 179                         }
 180                 }
 181
 182                 void GotResponse (IAsyncResult result)
 183                 {
 184                         HttpChannelRequestAsyncResult channelResult = (HttpChannelRequestAsyncResult) result.AsyncState;
 185                         channelResult.CompletedSynchronously &= result.CompletedSynchronously;
 186
 187                         WebResponse res;
 188                         Stream resstr;
 189                         try {
 190                                 res = web_request.EndGetResponse (result);
 191                                 resstr = res.GetResponseStream ();
 192                         } catch (WebException we) {
 193                                 res = we.Response;
 194                                 if (res == null) {
 195                                         channelResult.Complete (we);
 196                                         return;
 197                                 }
 198                                 try {
 199                                         // The response might contain SOAP fault. It might not.
 200                                         resstr = res.GetResponseStream ();
 201                                 } catch (WebException we2) {
 202                                         channelResult.Complete (we2);
 203                                         return;
 204                                 }
 205                         }
 206
 207                         var hrr = (HttpWebResponse) res;
 208                         if ((int) hrr.StatusCode >= 400) {
 209                                 channelResult.Complete (new WebException (String.Format ("There was an error on processing web request: Status code {0}({1}): {2}", (int) hrr.StatusCode, hrr.StatusCode, hrr.StatusDescription)));
 210                         }
 211
 212                         try {
 213                                 using (var responseStream = resstr) {
 214                                         MemoryStream ms = new MemoryStream ();
 215                                         byte [] b = new byte [65536];
 216                                         int n = 0;
 217
 218                                         while (true) {
 219                                                 n = responseStream.Read (b, 0, 65536);
 220                                                 if (n == 0)
 221                                                         break;
 222                                                 ms.Write (b, 0, n);
 223                                         }
 224                                         ms.Seek (0, SeekOrigin.Begin);
 225
 226                                         channelResult.Response = Encoder.ReadMessage (
 227                                                 //responseStream, MaxSizeOfHeaders);
 228                                                 ms, MaxSizeOfHeaders, res.ContentType);
 229 /*
 230 MessageBuffer buf = ret.CreateBufferedCopy (0x10000);
 231 ret = buf.CreateMessage ();
 232 System.Xml.XmlTextWriter w = new System.Xml.XmlTextWriter (Console.Out);
 233 w.Formatting = System.Xml.Formatting.Indented;
 234 buf.CreateMessage ().WriteMessage (w);
 235 w.Close ();
 236 */
 237                                         channelResult.Complete ();
 238                                 }
 239                         } catch (Exception ex) {
 240                                 channelResult.Complete (ex);
 241                         } finally {
 242                                 res.Close ();
 243                         }
 244                 }
 245
 246                 public override IAsyncResult BeginRequest (Message message, TimeSpan timeout, AsyncCallback callback, object state)
 247                 {
 248                         ThrowIfDisposedOrNotOpen ();
 249
 250                         HttpChannelRequestAsyncResult result = new HttpChannelRequestAsyncResult (message, timeout, callback, state);
 251                         BeginProcessRequest (result);
 252                         return result;
 253                 }
 254
 255                 public override Message EndRequest (IAsyncResult result)
 256                 {
 257                         if (result == null)
 258                                 throw new ArgumentNullException ("result");
 259                         HttpChannelRequestAsyncResult r = result as HttpChannelRequestAsyncResult;
 260                         if (r == null)
 261                                 throw new InvalidOperationException ("Wrong IAsyncResult");
 262                         r.WaitEnd ();
 263                         return r.Response;
 264                 }
 265
 266                 // Abort
 267
 268                 protected override void OnAbort ()
 269                 {
 270                         if (web_request != null)
 271                                 web_request.Abort ();
 272                         web_request = null;
 273                 }
 274
 275                 // Close
 276
 277                 protected override void OnClose (TimeSpan timeout)
 278                 {
 279                         if (web_request != null)
 280                                 web_request.Abort ();
 281                         web_request = null;
 282                 }
 283
 284                 protected override IAsyncResult OnBeginClose (TimeSpan timeout, AsyncCallback callback, object state)
 285                 {
 286                         throw new NotImplementedException ();
 287                 }
 288
 289                 protected override void OnEndClose (IAsyncResult result)
 290                 {
 291                         throw new NotImplementedException ();
 292                 }
 293
 294                 // Open
 295
 296                 protected override void OnOpen (TimeSpan timeout)
 297                 {
 298                 }
 299
 300                 protected override IAsyncResult OnBeginOpen (TimeSpan timeout, AsyncCallback callback, object state)
 301                 {
 302                         throw new NotImplementedException ();
 303                 }
 304
 305                 protected override void OnEndOpen (IAsyncResult result)
 306                 {
 307                         throw new NotImplementedException ();
 308                 }
 309
 310                 class HttpChannelRequestAsyncResult : IAsyncResult
 311                 {
 312                         public Message Message {
 313                                 get; private set;
 314                         }
 315
 316                         public TimeSpan Timeout {
 317                                 get; private set;
 318                         }
 319
 320                         AsyncCallback callback;
 321                         ManualResetEvent wait;
 322                         Exception error;
 323
 324                         public HttpChannelRequestAsyncResult (Message message, TimeSpan timeout, AsyncCallback callback, object state)
 325                         {
 326                                 CompletedSynchronously = true;
 327                                 Message = message;
 328                                 Timeout = timeout;
 329                                 this.callback = callback;
 330                                 AsyncState = state;
 331
 332                                 wait = new ManualResetEvent (false);
 333                         }
 334
 335                         public Message Response {
 336                                 get; set;
 337                         }
 338
 339                         public WaitHandle AsyncWaitHandle {
 340                                 get { return wait; }
 341                         }
 342
 343                         public object AsyncState {
 344                                 get; private set;
 345                         }
 346
 347                         public void Complete ()
 348                         {
 349                                 Complete (null);
 350                         }
 351
 352                         public void Complete (Exception ex)
 353                         {
 354                                 if (IsCompleted) {
 355                                         return;
 356                                 }
 357                                 // If we've already stored an error, don't replace it
 358                                 error = error ?? ex;
 359
 360                                 IsCompleted = true;
 361                                 wait.Set ();
 362                                 if (callback != null)
 363                                         callback (this);
 364                         }
 365
 366                         public bool CompletedSynchronously {
 367                                 get; set;
 368                         }
 369
 370                         public bool IsCompleted {
 371                                 get; private set;
 372                         }
 373
 374                         public void WaitEnd ()
 375                         {
 376                                 if (!IsCompleted) {
 377                                         // FIXME: Do we need to use the timeout? If so, what happens when the timeout is reached.
 378                                         // Is the current request cancelled and an exception thrown? If so we need to pass the
 379                                         // exception to the Complete () method and allow the result to complete 'normally'.
 380 #if NET_2_1
 381                                         // neither Moonlight nor MonoTouch supports contexts (WaitOne default to false)
 382                                         bool result = wait.WaitOne (Timeout);
 383 #else
 384                                         bool result = wait.WaitOne (Timeout, true);
 385 #endif
 386                                         if (!result)
 387                                                 throw new TimeoutException ();
 388                                 }
 389                                 if (error != null)
 390                                         throw error;
 391                         }
 392                 }
 393         }
 394 }