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