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                 List<WebRequest> web_requests = new List<WebRequest> ();
  45
  46                 // Constructor
  47
  48                 public HttpRequestChannel (HttpChannelFactory<IRequestChannel> factory,
  49                         EndpointAddress address, Uri via)
  50                         : base (factory, address, via)
  51                 {
  52                         this.source = factory;
  53                 }
  54
  55                 public MessageEncoder Encoder {
  56                         get { return source.MessageEncoder; }
  57                 }
  58
  59 #if NET_2_1
  60                 public override T GetProperty<T> ()
  61                 {
  62                         if (typeof (T) == typeof (IHttpCookieContainerManager))
  63                                 return source.GetProperty<T> ();
  64                         return base.GetProperty<T> ();
  65                 }
  66 #endif
  67
  68                 // Request
  69
  70                 public override Message Request (Message message, TimeSpan timeout)
  71                 {
  72                         return EndRequest (BeginRequest (message, timeout, null, null));
  73                 }
  74
  75                 void BeginProcessRequest (HttpChannelRequestAsyncResult result)
  76                 {
  77                         Message message = result.Message;
  78                         TimeSpan timeout = result.Timeout;
  79                         // FIXME: is distination really like this?
  80                         Uri destination = message.Headers.To;
  81                         if (destination == null) {
  82                                 if (source.Transport.ManualAddressing)
  83                                         throw new InvalidOperationException ("When manual addressing is enabled on the transport, every request messages must be set its destination address.");
  84                                  else
  85                                         destination = Via ?? RemoteAddress.Uri;
  86                         }
  87
  88                         var web_request = HttpWebRequest.Create (destination);
  89                         web_requests.Add (web_request);
  90                         result.WebRequest = web_request;
  91                         web_request.Method = "POST";
  92                         web_request.ContentType = Encoder.ContentType;
  93 #if NET_2_1
  94                         HttpWebRequest hwr = (web_request as HttpWebRequest);
  95                                 var cmgr = source.GetProperty<IHttpCookieContainerManager> ();
  96                                 if (cmgr != null)
  97                                         hwr.CookieContainer = cmgr.CookieContainer;
  98 #endif
  99
 100                         // client authentication (while SL3 has NetworkCredential class, it is not implemented yet. So, it is non-SL only.)
 101                         var httpbe = (HttpTransportBindingElement) source.Transport;
 102                         string authType = null;
 103                         switch (httpbe.AuthenticationScheme) {
 104                         // AuthenticationSchemes.Anonymous is the default, ignored.
 105                         case AuthenticationSchemes.Basic:
 106                                 authType = "Basic";
 107                                 break;
 108                         case AuthenticationSchemes.Digest:
 109                                 authType = "Digest";
 110                                 break;
 111                         case AuthenticationSchemes.Ntlm:
 112                                 authType = "Ntlm";
 113                                 break;
 114                         case AuthenticationSchemes.Negotiate:
 115                                 authType = "Negotiate";
 116                                 break;
 117                         }
 118                         if (authType != null) {
 119                                 var cred = source.ClientCredentials;
 120                                 string user = cred != null ? cred.UserName.UserName : null;
 121                                 string pwd = cred != null ? cred.UserName.Password : null;
 122                                 if (String.IsNullOrEmpty (user))
 123                                         throw new InvalidOperationException (String.Format ("Use ClientCredentials to specify a user name for required HTTP {0} authentication.", authType));
 124                                 var nc = new NetworkCredential (user, pwd);
 125                                 web_request.Credentials = nc;
 126                                 // FIXME: it is said required in SL4, but it blocks full WCF.
 127                                 //web_request.UseDefaultCredentials = false;
 128                         }
 129
 130 #if !NET_2_1 // FIXME: implement this to not depend on Timeout property
 131                         web_request.Timeout = (int) timeout.TotalMilliseconds;
 132 #endif
 133
 134                         // There is no SOAP Action/To header when AddressingVersion is None.
 135                         if (message.Version.Envelope.Equals (EnvelopeVersion.Soap11) ||
 136                             message.Version.Addressing.Equals (AddressingVersion.None)) {
 137                                 if (message.Headers.Action != null) {
 138                                         web_request.Headers ["SOAPAction"] = String.Concat ("\"", message.Headers.Action, "\"");
 139                                         message.Headers.RemoveAll ("Action", message.Version.Addressing.Namespace);
 140                                 }
 141                         }
 142
 143                         // apply HttpRequestMessageProperty if exists.
 144                         bool suppressEntityBody = false;
 145                         string pname = HttpRequestMessageProperty.Name;
 146                         if (message.Properties.ContainsKey (pname)) {
 147                                 HttpRequestMessageProperty hp = (HttpRequestMessageProperty) message.Properties [pname];
 148                                 foreach (var key in hp.Headers.AllKeys)
 149                                         if (!WebHeaderCollection.IsRestricted (key))
 150                                                 web_request.Headers [key] = hp.Headers [key];
 151                                 web_request.Method = hp.Method;
 152                                 // FIXME: do we have to handle hp.QueryString ?
 153                                 if (hp.SuppressEntityBody)
 154                                         suppressEntityBody = true;
 155                         }
 156 #if !NET_2_1
 157                         if (source.ClientCredentials != null) {
 158                                 var cred = source.ClientCredentials;
 159                                 if ((cred.ClientCertificate != null) && (cred.ClientCertificate.Certificate != null))
 160                                         ((HttpWebRequest)web_request).ClientCertificates.Add (cred.ClientCertificate.Certificate);
 161                         }
 162 #endif
 163
 164                         if (!suppressEntityBody && String.Compare (web_request.Method, "GET", StringComparison.OrdinalIgnoreCase) != 0) {
 165                                 MemoryStream buffer = new MemoryStream ();
 166                                 Encoder.WriteMessage (message, buffer);
 167
 168                                 if (buffer.Length > int.MaxValue)
 169                                         throw new InvalidOperationException ("The argument message is too large.");
 170
 171 #if !NET_2_1
 172                                 web_request.ContentLength = (int) buffer.Length;
 173 #endif
 174
 175                                 web_request.BeginGetRequestStream (delegate (IAsyncResult r) {
 176                                         try {
 177                                                 result.CompletedSynchronously &= r.CompletedSynchronously;
 178                                                 using (Stream s = web_request.EndGetRequestStream (r))
 179                                                         s.Write (buffer.GetBuffer (), 0, (int) buffer.Length);
 180                                                 web_request.BeginGetResponse (GotResponse, result);
 181                                         } catch (WebException ex) {
 182                                                 switch (ex.Status) {
 183 #if !NET_2_1
 184                                                 case WebExceptionStatus.NameResolutionFailure:
 185 #endif
 186                                                 case WebExceptionStatus.ConnectFailure:
 187                                                         result.Complete (new EndpointNotFoundException (new EndpointNotFoundException ().Message, ex));
 188                                                         break;
 189                                                 default:
 190                                                         result.Complete (ex);
 191                                                         break;
 192                                                 }
 193                                         } catch (Exception ex) {
 194                                                 result.Complete (ex);
 195                                         }
 196                                 }, null);
 197                         } else {
 198                                 web_request.BeginGetResponse (GotResponse, result);
 199                         }
 200                 }
 201
 202                 void GotResponse (IAsyncResult result)
 203                 {
 204                         HttpChannelRequestAsyncResult channelResult = (HttpChannelRequestAsyncResult) result.AsyncState;
 205                         channelResult.CompletedSynchronously &= result.CompletedSynchronously;
 206
 207                         WebResponse res;
 208                         Stream resstr;
 209                         try {
 210                                 res = channelResult.WebRequest.EndGetResponse (result);
 211                                 resstr = res.GetResponseStream ();
 212                         } catch (WebException we) {
 213                                 res = we.Response;
 214                                 if (res == null) {
 215                                         channelResult.Complete (we);
 216                                         return;
 217                                 }
 218
 219
 220                                 var hrr2 = (HttpWebResponse) res;
 221
 222                                 if ((int) hrr2.StatusCode >= 400 && (int) hrr2.StatusCode < 500) {
 223                                         Exception exception = new WebException (
 224                                                 String.Format ("There was an error on processing web request: Status code {0}({1}): {2}",
 225                                                                (int) hrr2.StatusCode, hrr2.StatusCode, hrr2.StatusDescription), null,
 226                                                 WebExceptionStatus.ProtocolError, hrr2);
 227
 228                                         if ((int) hrr2.StatusCode == 404) {
 229                                                 // Throw the same exception .NET does
 230                                                 exception = new EndpointNotFoundException (
 231                                                         "There was no endpoint listening at {0} that could accept the message. This is often caused by an incorrect address " +
 232                                                         "or SOAP action. See InnerException, if present, for more details.",
 233                                                         exception);
 234                                         }
 235
 236                                         channelResult.Complete (exception);
 237                                         return;
 238                                 }
 239
 240
 241                                 try {
 242                                         // The response might contain SOAP fault. It might not.
 243                                         resstr = res.GetResponseStream ();
 244                                 } catch (WebException we2) {
 245                                         channelResult.Complete (we2);
 246                                         return;
 247                                 }
 248                         }
 249
 250                         var hrr = (HttpWebResponse) res;
 251                         if ((int) hrr.StatusCode >= 400 && (int) hrr.StatusCode < 500) {
 252                                 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)));
 253                         }
 254
 255                         try {
 256                                 Message ret;
 257
 258                                 // TODO: unit test to make sure an empty response never throws
 259                                 // an exception at this level
 260                                 if (hrr.ContentLength == 0) {
 261                                         ret = Message.CreateMessage (Encoder.MessageVersion, String.Empty);
 262                                 } else {
 263
 264                                         using (var responseStream = resstr) {
 265                                                 MemoryStream ms = new MemoryStream ();
 266                                                 byte [] b = new byte [65536];
 267                                                 int n = 0;
 268
 269                                                 while (true) {
 270                                                         n = responseStream.Read (b, 0, 65536);
 271                                                         if (n == 0)
 272                                                                 break;
 273                                                         ms.Write (b, 0, n);
 274                                                 }
 275                                                 ms.Seek (0, SeekOrigin.Begin);
 276
 277                                                 ret = Encoder.ReadMessage (
 278                                                         ms, (int) source.Transport.MaxReceivedMessageSize, res.ContentType);
 279                                         }
 280                                 }
 281
 282                                 var rp = new HttpResponseMessageProperty () { StatusCode = hrr.StatusCode, StatusDescription = hrr.StatusDescription };
 283                                 foreach (var key in hrr.Headers.AllKeys)
 284                                         rp.Headers [key] = hrr.Headers [key];
 285                                 ret.Properties.Add (HttpResponseMessageProperty.Name, rp);
 286
 287                                 channelResult.Response = ret;
 288                                 channelResult.Complete ();
 289                         } catch (Exception ex) {
 290                                 channelResult.Complete (ex);
 291                         } finally {
 292                                 res.Close ();
 293                         }
 294                 }
 295
 296                 public override IAsyncResult BeginRequest (Message message, TimeSpan timeout, AsyncCallback callback, object state)
 297                 {
 298                         ThrowIfDisposedOrNotOpen ();
 299
 300                         HttpChannelRequestAsyncResult result = new HttpChannelRequestAsyncResult (message, timeout, this, callback, state);
 301                         BeginProcessRequest (result);
 302                         return result;
 303                 }
 304
 305                 public override Message EndRequest (IAsyncResult result)
 306                 {
 307                         if (result == null)
 308                                 throw new ArgumentNullException ("result");
 309                         HttpChannelRequestAsyncResult r = result as HttpChannelRequestAsyncResult;
 310                         if (r == null)
 311                                 throw new InvalidOperationException ("Wrong IAsyncResult");
 312                         r.WaitEnd ();
 313                         return r.Response;
 314                 }
 315
 316                 // Abort
 317
 318                 protected override void OnAbort ()
 319                 {
 320                         foreach (var web_request in web_requests.ToArray ())
 321                                 web_request.Abort ();
 322                         web_requests.Clear ();
 323                 }
 324
 325                 // Close
 326
 327                 protected override void OnClose (TimeSpan timeout)
 328                 {
 329                         OnAbort ();
 330                 }
 331
 332                 protected override IAsyncResult OnBeginClose (TimeSpan timeout, AsyncCallback callback, object state)
 333                 {
 334                         OnAbort ();
 335                         return base.OnBeginClose (timeout, callback, state);
 336                 }
 337
 338                 protected override void OnEndClose (IAsyncResult result)
 339                 {
 340                         base.OnEndClose (result);
 341                 }
 342
 343                 // Open
 344
 345                 protected override void OnOpen (TimeSpan timeout)
 346                 {
 347                 }
 348
 349                 [MonoTODO ("find out what to do here")]
 350                 protected override IAsyncResult OnBeginOpen (TimeSpan timeout, AsyncCallback callback, object state)
 351                 {
 352                         return base.OnBeginOpen (timeout, callback, state);
 353                 }
 354
 355                 [MonoTODO ("find out what to do here")]
 356                 protected override void OnEndOpen (IAsyncResult result)
 357                 {
 358                         base.OnEndOpen (result);
 359                 }
 360
 361                 class HttpChannelRequestAsyncResult : IAsyncResult, IDisposable
 362                 {
 363                         public Message Message {
 364                                 get; private set;
 365                         }
 366
 367                         public TimeSpan Timeout {
 368                                 get; private set;
 369                         }
 370
 371                         AsyncCallback callback;
 372                         ManualResetEvent wait;
 373                         Exception error;
 374                         object locker = new object ();
 375                         bool is_completed;
 376                         HttpRequestChannel owner;
 377
 378                         public HttpChannelRequestAsyncResult (Message message, TimeSpan timeout, HttpRequestChannel owner, AsyncCallback callback, object state)
 379                         {
 380                                 Message = message;
 381                                 Timeout = timeout;
 382                                 this.owner = owner;
 383                                 this.callback = callback;
 384                                 AsyncState = state;
 385                         }
 386
 387                         public Message Response {
 388                                 get; set;
 389                         }
 390
 391                         public WebRequest WebRequest { get; set; }
 392
 393                         public WaitHandle AsyncWaitHandle {
 394                                 get {
 395                                         lock (locker) {
 396                                                 if (wait == null)
 397                                                         wait = new ManualResetEvent (is_completed);
 398                                         }
 399                                         return wait;
 400                                 }
 401                         }
 402
 403                         public object AsyncState {
 404                                 get; private set;
 405                         }
 406
 407                         public void Complete ()
 408                         {
 409                                 Complete (null);
 410                         }
 411
 412                         public void Complete (Exception ex)
 413                         {
 414                                 if (IsCompleted) {
 415                                         return;
 416                                 }
 417                                 // If we've already stored an error, don't replace it
 418                                 error = error ?? ex;
 419
 420                                 IsCompleted = true;
 421                                 if (callback != null)
 422                                         callback (this);
 423                         }
 424
 425                         public bool CompletedSynchronously {
 426                                 get; set;
 427                         }
 428
 429                         public bool IsCompleted {
 430                                 get { return is_completed; }
 431                                 set {
 432                                         is_completed = value;
 433                                         lock (locker) {
 434                                                 if (is_completed && wait != null)
 435                                                         wait.Set ();
 436                                                 Cleanup ();
 437                                         }
 438                                 }
 439                         }
 440
 441                         public void WaitEnd ()
 442                         {
 443                                 if (!IsCompleted) {
 444                                         // FIXME: Do we need to use the timeout? If so, what happens when the timeout is reached.
 445                                         // Is the current request cancelled and an exception thrown? If so we need to pass the
 446                                         // exception to the Complete () method and allow the result to complete 'normally'.
 447 #if NET_2_1
 448                                         // neither Moonlight nor MonoTouch supports contexts (WaitOne default to false)
 449                                         bool result = AsyncWaitHandle.WaitOne (Timeout);
 450 #else
 451                                         bool result = AsyncWaitHandle.WaitOne (Timeout, true);
 452 #endif
 453                                         if (!result)
 454                                                 throw new TimeoutException ();
 455                                 }
 456                                 if (error != null)
 457                                         throw error;
 458                         }
 459
 460                         public void Dispose ()
 461                         {
 462                                 Cleanup ();
 463                         }
 464
 465                         void Cleanup ()
 466                         {
 467                                 owner.web_requests.Remove (WebRequest);
 468                         }
 469                 }
 470         }
 471 }