mcs/class/System/System.Net/HttpWebResponse.cs

   1 //
   2 // System.Net.HttpWebResponse
   3 //
   4 // Authors:
   5 //      Lawrence Pit (loz@cable.a2000.nl)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //
   8 // (c) 2002 Lawrence Pit
   9 // (c) 2003 Ximian, Inc. (http://www.ximian.com)
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Collections;
  35 using System.Globalization;
  36 using System.IO;
  37 using System.Net.Sockets;
  38 using System.Runtime.Serialization;
  39 using System.Text;
  40
  41 namespace System.Net
  42 {
  43         [Serializable]
  44         public class HttpWebResponse : WebResponse, ISerializable, IDisposable
  45         {
  46                 Uri uri;
  47                 WebHeaderCollection webHeaders;
  48                 CookieCollection cookieCollection;
  49                 string method;
  50                 Version version;
  51                 HttpStatusCode statusCode;
  52                 string statusDescription;
  53                 long contentLength = -1;
  54                 string contentType;
  55                 CookieContainer cookieContainer;
  56
  57                 bool disposed = false;
  58                 Stream stream;
  59
  60                 // Constructors
  61
  62                 internal HttpWebResponse (Uri uri, string method, WebConnectionData data, CookieContainer container)
  63                 {
  64                         this.uri = uri;
  65                         this.method = method;
  66                         webHeaders = data.Headers;
  67                         version = data.Version;
  68                         statusCode = (HttpStatusCode) data.StatusCode;
  69                         statusDescription = data.StatusDescription;
  70                         stream = data.stream;
  71                         if (container != null) {
  72                                 this.cookieContainer = container;
  73                                 FillCookies ();
  74                         } else if (webHeaders != null) {
  75                                 webHeaders.RemoveInternal ("Set-Cookie");
  76                                 webHeaders.RemoveInternal ("Set-Cookie2");
  77                         }
  78                 }
  79
  80                 protected HttpWebResponse (SerializationInfo serializationInfo, StreamingContext streamingContext)
  81                 {
  82                         SerializationInfo info = serializationInfo;
  83
  84                         uri = (Uri) info.GetValue ("uri", typeof (Uri));
  85                         contentLength = info.GetInt64 ("contentLength");
  86                         contentType = info.GetString ("contentType");
  87                         method = info.GetString ("method");
  88                         statusDescription = info.GetString ("statusDescription");
  89                         cookieCollection = (CookieCollection) info.GetValue ("cookieCollection", typeof (CookieCollection));
  90                         version = (Version) info.GetValue ("version", typeof (Version));
  91                         statusCode = (HttpStatusCode) info.GetValue ("statusCode", typeof (HttpStatusCode));
  92                 }
  93
  94                 // Properties
  95
  96                 public string CharacterSet {
  97                         // Content-Type   = "Content-Type" ":" media-type
  98                         // media-type     = type "/" subtype *( ";" parameter )
  99                         // parameter      = attribute "=" value
 100                         // 3.7.1. default is ISO-8859-1
 101                         get {
 102                                 CheckDisposed ();
 103                                 string contentType = ContentType;
 104                                 if (contentType == null)
 105                                         return "ISO-8859-1";
 106                                 string val = contentType.ToLower ();
 107                                 int pos = val.IndexOf ("charset=");
 108                                 if (pos == -1)
 109                                         return "ISO-8859-1";
 110                                 pos += 8;
 111                                 int pos2 = val.IndexOf (';', pos);
 112                                 return (pos2 == -1)
 113                                      ? contentType.Substring (pos)
 114                                      : contentType.Substring (pos, pos2 - pos);
 115                         }
 116                 }
 117
 118                 public string ContentEncoding {
 119                         get {
 120                                 CheckDisposed ();
 121                                 return webHeaders ["Content-Encoding"];
 122                         }
 123                 }
 124
 125                 public override long ContentLength {
 126                         get {
 127                                 CheckDisposed ();
 128                                 if (contentLength != -1)
 129                                         return contentLength;
 130
 131                                 try {
 132                                         contentLength = (long) UInt64.Parse (webHeaders ["Content-Length"]);
 133                                 } catch (Exception) {
 134                                         return -1;
 135                                 }
 136
 137                                 return contentLength;
 138                         }
 139                 }
 140
 141                 public override string ContentType {
 142                         get {
 143                                 CheckDisposed ();
 144                                 if (contentType == null)
 145                                         contentType = webHeaders ["Content-Type"];
 146
 147                                 return contentType;
 148                         }
 149                 }
 150
 151                 public CookieCollection Cookies {
 152                         get {
 153                                 CheckDisposed ();
 154
 155                                 if (cookieCollection == null)
 156                                         cookieCollection = new CookieCollection ();
 157                                 return cookieCollection;
 158                         }
 159                         set {
 160                                 CheckDisposed ();
 161                                 cookieCollection = value;
 162                         }
 163                 }
 164
 165                 public override WebHeaderCollection Headers {
 166                         get {
 167                                 CheckDisposed ();
 168                                 return webHeaders;
 169                         }
 170                 }
 171
 172                 public DateTime LastModified {
 173                         get {
 174                                 CheckDisposed ();
 175                                 try {
 176                                         string dtStr = webHeaders ["Last-Modified"];
 177                                         return MonoHttpDate.Parse (dtStr);
 178                                 } catch (Exception) {
 179                                         return DateTime.Now;
 180                                 }
 181                         }
 182                 }
 183
 184                 public string Method {
 185                         get {
 186                                 CheckDisposed ();
 187                                 return method;
 188                         }
 189                 }
 190
 191                 public Version ProtocolVersion {
 192                         get {
 193                                 CheckDisposed ();
 194                                 return version;
 195                         }
 196                 }
 197
 198                 public override Uri ResponseUri {
 199                         get {
 200                                 CheckDisposed ();
 201                                 return uri;
 202                         }
 203                 }
 204
 205                 public string Server {
 206                         get {
 207                                 CheckDisposed ();
 208                                 return webHeaders ["Server"];
 209                         }
 210                 }
 211
 212                 public HttpStatusCode StatusCode {
 213                         get {
 214                                 CheckDisposed ();
 215                                 return statusCode;
 216                         }
 217                 }
 218
 219                 public string StatusDescription {
 220                         get {
 221                                 CheckDisposed ();
 222                                 return statusDescription;
 223                         }
 224                 }
 225
 226                 // Methods
 227
 228                 public override int GetHashCode ()
 229                 {
 230                         CheckDisposed ();
 231                         return base.GetHashCode ();
 232                 }
 233
 234                 public string GetResponseHeader (string headerName)
 235                 {
 236                         CheckDisposed ();
 237                         string value = webHeaders [headerName];
 238                         return (value != null) ? value : "";
 239                 }
 240
 241                 internal void ReadAll ()
 242                 {
 243                         WebConnectionStream wce = stream as WebConnectionStream;
 244                         if (wce == null)
 245                                 return;
 246
 247                         try {
 248                                 wce.ReadAll ();
 249                         } catch {}
 250                 }
 251
 252                 public override Stream GetResponseStream ()
 253                 {
 254                         CheckDisposed ();
 255                         if (stream == null)
 256                                 return Stream.Null;
 257                         if (0 == String.Compare (method, "HEAD", true)) // see par 4.3 & 9.4
 258                                 return Stream.Null;
 259
 260                         return stream;
 261                 }
 262
 263                 void ISerializable.GetObjectData (SerializationInfo serializationInfo,
 264                                                   StreamingContext streamingContext)
 265                 {
 266                         SerializationInfo info = serializationInfo;
 267
 268                         info.AddValue ("uri", uri);
 269                         info.AddValue ("contentLength", contentLength);
 270                         info.AddValue ("contentType", contentType);
 271                         info.AddValue ("method", method);
 272                         info.AddValue ("statusDescription", statusDescription);
 273                         info.AddValue ("cookieCollection", cookieCollection);
 274                         info.AddValue ("version", version);
 275                         info.AddValue ("statusCode", statusCode);
 276                 }
 277
 278
 279                 // Cleaning up stuff
 280
 281                 public override void Close ()
 282                 {
 283                         ((IDisposable) this).Dispose ();
 284                 }
 285
 286                 void IDisposable.Dispose ()
 287                 {
 288                         Dispose (true);
 289                         GC.SuppressFinalize (this);
 290                 }
 291
 292                 protected virtual void Dispose (bool disposing)
 293                 {
 294                         if (this.disposed)
 295                                 return;
 296                         this.disposed = true;
 297
 298                         if (disposing) {
 299                                 // release managed resources
 300                                 uri = null;
 301                                 webHeaders = null;
 302                                 cookieCollection = null;
 303                                 method = null;
 304                                 version = null;
 305                                 statusDescription = null;
 306                         }
 307
 308                         // release unmanaged resources
 309                         Stream st = stream;
 310                         stream = null;
 311                         if (st != null)
 312                                 st.Close ();
 313                 }
 314
 315                 private void CheckDisposed ()
 316                 {
 317                         if (disposed)
 318                                 throw new ObjectDisposedException (GetType ().FullName);
 319                 }
 320
 321                 void FillCookies ()
 322                 {
 323                         if (webHeaders == null)
 324                                 return;
 325
 326                         string [] values = webHeaders.GetValues ("Set-Cookie");
 327                         if (values != null) {
 328                                 foreach (string va in values)
 329                                         SetCookie (va);
 330                         }
 331
 332                         values = webHeaders.GetValues ("Set-Cookie2");
 333                         if (values != null) {
 334                                 foreach (string va in values)
 335                                         SetCookie2 (va);
 336                         }
 337                 }
 338
 339                 void SetCookie (string header)
 340                 {
 341                         string name, val;
 342                         Cookie cookie = null;
 343                         CookieParser parser = new CookieParser (header);
 344
 345                         while (parser.GetNextNameValue (out name, out val)) {
 346                                 if (name == null || name == "")
 347                                         continue;
 348
 349                                 if (cookie == null) {
 350                                         cookie = new Cookie (name, val);
 351                                         continue;
 352                                 }
 353
 354                                 name = name.ToUpper ();
 355                                 switch (name) {
 356                                 case "COMMENT":
 357                                         if (cookie.Comment == null)
 358                                                 cookie.Comment = val;
 359                                         break;
 360                                 case "COMMENTURL":
 361                                         if (cookie.CommentUri == null)
 362                                                 cookie.CommentUri = new Uri (val);
 363                                         break;
 364                                 case "DISCARD":
 365                                         cookie.Discard = true;
 366                                         break;
 367                                 case "DOMAIN":
 368                                         if (cookie.Domain == "")
 369                                                 cookie.Domain = val;
 370                                         break;
 371                                 case "MAX-AGE": // RFC Style Set-Cookie2
 372                                         if (cookie.Expires == DateTime.MinValue)
 373                                                 cookie.Expires = cookie.TimeStamp.AddSeconds (Int32.Parse (val));
 374                                         break;
 375                                 case "EXPIRES": // Netscape Style Set-Cookie
 376                                         if (cookie.Expires != DateTime.MinValue)
 377                                                 break;
 378                                         try {
 379                                                 cookie.Expires = DateTime.ParseExact (val, "r", CultureInfo.InvariantCulture);
 380                                         } catch {
 381                                                 try {
 382                                                 cookie.Expires = DateTime.ParseExact (val,
 383                                                                 "ddd, dd'-'MMM'-'yyyy HH':'mm':'ss 'GMT'",
 384                                                                 CultureInfo.InvariantCulture);
 385                                                 } catch {
 386                                                         cookie.Expires = DateTime.Now.AddDays (1);
 387                                                 }
 388                                         }
 389                                         break;
 390                                 case "PATH":
 391                                         cookie.Path = val;
 392                                         break;
 393                                 case "PORT":
 394                                         if (cookie.Port == null)
 395                                                 cookie.Port = val;
 396                                         break;
 397                                 case "SECURE":
 398                                         cookie.Secure = true;
 399                                         break;
 400                                 case "VERSION":
 401                                         cookie.Version = Int32.Parse (val);
 402                                         break;
 403                                 }
 404                         }
 405
 406                         if (cookieCollection == null)
 407                                 cookieCollection = new CookieCollection ();
 408
 409                         if (cookie.Domain == "")
 410                                 cookie.Domain = uri.Host;
 411
 412                         cookieCollection.Add (cookie);
 413                         if (cookieContainer != null)
 414                                 cookieContainer.Add (uri, cookie);
 415                 }
 416
 417                 void SetCookie2 (string cookies_str)
 418                 {
 419                         string [] cookies = cookies_str.Split (',');
 420
 421                         foreach (string cookie_str in cookies)
 422                                 SetCookie (cookie_str);
 423                 }
 424         }
 425
 426         class CookieParser {
 427                 string header;
 428                 int pos;
 429                 int length;
 430
 431                 public CookieParser (string header) : this (header, 0)
 432                 {
 433                 }
 434
 435                 public CookieParser (string header, int position)
 436                 {
 437                         this.header = header;
 438                         this.pos = position;
 439                         this.length = header.Length;
 440                 }
 441
 442                 public bool GetNextNameValue (out string name, out string val)
 443                 {
 444                         name = null;
 445                         val = null;
 446
 447                         if (pos >= length)
 448                                 return false;
 449
 450                         name = GetCookieName ();
 451                         if (header [pos] == '=') {
 452                                 pos++;
 453                                 val = GetCookieValue ();
 454                                 if (pos < length && header [pos] == ';')
 455                                         pos++;
 456                         }
 457
 458                         return true;
 459                 }
 460
 461                 string GetCookieName ()
 462                 {
 463                         int k = pos;
 464                         while (k < length && Char.IsWhiteSpace (header [k]))
 465                                 k++;
 466
 467                         int begin = k;
 468                         while (k < length && header [k] != ';' &&  header [k] != '=')
 469                                 k++;
 470
 471                         pos = k;
 472                         return header.Substring (begin, k - begin).Trim ();
 473                 }
 474
 475                 string GetCookieValue ()
 476                 {
 477                         if (pos >= length)
 478                                 return null;
 479
 480                         int k = pos;
 481                         while (k < length && Char.IsWhiteSpace (header [k]))
 482                                 k++;
 483
 484                         int begin;
 485                         if (header [k] == '"'){
 486                                 int j;
 487                                 begin = ++k;
 488
 489                                 while (k < length && header [k] != '"')
 490                                         k++;
 491
 492                                 for (j = k; j < length && header [j] != ';'; j++)
 493                                         ;
 494                                 pos = j;
 495                         } else {
 496                                 begin = k;
 497                                 while (k < length && header [k] != ';')
 498                                         k++;
 499                                 pos = k;
 500                         }
 501
 502                         return header.Substring (begin, k - begin).Trim ();
 503                 }
 504         }
 505 }
 506