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 cookie_container;
  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.cookie_container = container;
  73                                 FillCookies ();
  74                         }
  75                 }
  76
  77                 protected HttpWebResponse (SerializationInfo serializationInfo, StreamingContext streamingContext)
  78                 {
  79                         SerializationInfo info = serializationInfo;
  80
  81                         uri = (Uri) info.GetValue ("uri", typeof (Uri));
  82                         contentLength = info.GetInt64 ("contentLength");
  83                         contentType = info.GetString ("contentType");
  84                         method = info.GetString ("method");
  85                         statusDescription = info.GetString ("statusDescription");
  86                         cookieCollection = (CookieCollection) info.GetValue ("cookieCollection", typeof (CookieCollection));
  87                         version = (Version) info.GetValue ("version", typeof (Version));
  88                         statusCode = (HttpStatusCode) info.GetValue ("statusCode", typeof (HttpStatusCode));
  89                 }
  90
  91                 // Properties
  92
  93                 public string CharacterSet {
  94                         // Content-Type   = "Content-Type" ":" media-type
  95                         // media-type     = type "/" subtype *( ";" parameter )
  96                         // parameter      = attribute "=" value
  97                         // 3.7.1. default is ISO-8859-1
  98                         get {
  99                                 CheckDisposed ();
 100                                 string contentType = ContentType;
 101                                 if (contentType == null)
 102                                         return "ISO-8859-1";
 103                                 string val = contentType.ToLower ();
 104                                 int pos = val.IndexOf ("charset=");
 105                                 if (pos == -1)
 106                                         return "ISO-8859-1";
 107                                 pos += 8;
 108                                 int pos2 = val.IndexOf (';', pos);
 109                                 return (pos2 == -1)
 110                                      ? contentType.Substring (pos)
 111                                      : contentType.Substring (pos, pos2 - pos);
 112                         }
 113                 }
 114
 115                 public string ContentEncoding {
 116                         get {
 117                                 CheckDisposed ();
 118                                 string h = webHeaders ["Content-Encoding"];
 119                                 return h != null ? h : "";
 120                         }
 121                 }
 122
 123                 public override long ContentLength {
 124                         get {
 125                                 CheckDisposed ();
 126                                 if (contentLength != -1)
 127                                         return contentLength;
 128
 129                                 try {
 130                                         contentLength = (long) UInt64.Parse (webHeaders ["Content-Length"]);
 131                                 } catch (Exception) {
 132                                         return -1;
 133                                 }
 134
 135                                 return contentLength;
 136                         }
 137                 }
 138
 139                 public override string ContentType {
 140                         get {
 141                                 CheckDisposed ();
 142                                 if (contentType == null)
 143                                         contentType = webHeaders ["Content-Type"];
 144
 145                                 return contentType;
 146                         }
 147                 }
 148
 149                 public CookieCollection Cookies {
 150                         get {
 151                                 CheckDisposed ();
 152
 153                                 if (cookieCollection == null)
 154                                         cookieCollection = new CookieCollection ();
 155                                 return cookieCollection;
 156                         }
 157                         set {
 158                                 CheckDisposed ();
 159                                 cookieCollection = value;
 160                         }
 161                 }
 162
 163                 public override WebHeaderCollection Headers {
 164                         get {
 165                                 CheckDisposed ();
 166                                 return webHeaders;
 167                         }
 168                 }
 169
 170                 public DateTime LastModified {
 171                         get {
 172                                 CheckDisposed ();
 173                                 try {
 174                                         string dtStr = webHeaders ["Last-Modified"];
 175                                         return MonoHttpDate.Parse (dtStr);
 176                                 } catch (Exception) {
 177                                         return DateTime.Now;
 178                                 }
 179                         }
 180                 }
 181
 182                 public string Method {
 183                         get {
 184                                 CheckDisposed ();
 185                                 return method;
 186                         }
 187                 }
 188
 189                 public Version ProtocolVersion {
 190                         get {
 191                                 CheckDisposed ();
 192                                 return version;
 193                         }
 194                 }
 195
 196                 public override Uri ResponseUri {
 197                         get {
 198                                 CheckDisposed ();
 199                                 return uri;
 200                         }
 201                 }
 202
 203                 public string Server {
 204                         get {
 205                                 CheckDisposed ();
 206                                 return webHeaders ["Server"];
 207                         }
 208                 }
 209
 210                 public HttpStatusCode StatusCode {
 211                         get {
 212                                 CheckDisposed ();
 213                                 return statusCode;
 214                         }
 215                 }
 216
 217                 public string StatusDescription {
 218                         get {
 219                                 CheckDisposed ();
 220                                 return statusDescription;
 221                         }
 222                 }
 223
 224                 // Methods
 225 #if !NET_2_0
 226                 public override int GetHashCode ()
 227                 {
 228                         CheckDisposed ();
 229                         return base.GetHashCode ();
 230                 }
 231 #endif
 232
 233                 public string GetResponseHeader (string headerName)
 234                 {
 235                         CheckDisposed ();
 236                         string value = webHeaders [headerName];
 237                         return (value != null) ? value : "";
 238                 }
 239
 240                 internal void ReadAll ()
 241                 {
 242                         WebConnectionStream wce = stream as WebConnectionStream;
 243                         if (wce == null)
 244                                 return;
 245
 246                         try {
 247                                 wce.ReadAll ();
 248                         } catch {}
 249                 }
 250
 251                 public override Stream GetResponseStream ()
 252                 {
 253                         CheckDisposed ();
 254                         if (stream == null)
 255                                 return Stream.Null;
 256                         if (0 == String.Compare (method, "HEAD", true)) // see par 4.3 & 9.4
 257                                 return Stream.Null;
 258
 259                         return stream;
 260                 }
 261
 262                 void ISerializable.GetObjectData (SerializationInfo serializationInfo,
 263                                                   StreamingContext streamingContext)
 264                 {
 265                         SerializationInfo info = serializationInfo;
 266
 267                         info.AddValue ("uri", uri);
 268                         info.AddValue ("contentLength", contentLength);
 269                         info.AddValue ("contentType", contentType);
 270                         info.AddValue ("method", method);
 271                         info.AddValue ("statusDescription", statusDescription);
 272                         info.AddValue ("cookieCollection", cookieCollection);
 273                         info.AddValue ("version", version);
 274                         info.AddValue ("statusCode", statusCode);
 275                 }
 276
 277
 278                 // Cleaning up stuff
 279
 280                 public override void Close ()
 281                 {
 282                         ((IDisposable) this).Dispose ();
 283                 }
 284
 285                 void IDisposable.Dispose ()
 286                 {
 287                         Dispose (true);
 288                         GC.SuppressFinalize (this);
 289                 }
 290
 291 #if !NET_2_0
 292                 protected virtual
 293 #endif
 294                 void Dispose (bool disposing)
 295                 {
 296                         if (this.disposed)
 297                                 return;
 298                         this.disposed = true;
 299
 300                         if (disposing) {
 301                                 // release managed resources
 302                                 uri = null;
 303                                 webHeaders = null;
 304                                 cookieCollection = null;
 305                                 method = null;
 306                                 version = null;
 307                                 statusDescription = null;
 308                         }
 309
 310                         // release unmanaged resources
 311                         Stream st = stream;
 312                         stream = null;
 313                         if (st != null)
 314                                 st.Close ();
 315                 }
 316
 317                 private void CheckDisposed ()
 318                 {
 319                         if (disposed)
 320                                 throw new ObjectDisposedException (GetType ().FullName);
 321                 }
 322
 323                 void FillCookies ()
 324                 {
 325                         if (webHeaders == null)
 326                                 return;
 327
 328                         string [] values = webHeaders.GetValues ("Set-Cookie");
 329                         if (values != null) {
 330                                 foreach (string va in values)
 331                                         SetCookie (va);
 332                         }
 333
 334                         values = webHeaders.GetValues ("Set-Cookie2");
 335                         if (values != null) {
 336                                 foreach (string va in values)
 337                                         SetCookie2 (va);
 338                         }
 339                 }
 340
 341                 void SetCookie (string header)
 342                 {
 343                         string name, val;
 344                         Cookie cookie = null;
 345                         CookieParser parser = new CookieParser (header);
 346
 347                         while (parser.GetNextNameValue (out name, out val)) {
 348                                 if ((name == null || name == "") && cookie == null)
 349                                         continue;
 350
 351                                 if (cookie == null) {
 352                                         cookie = new Cookie (name, val);
 353                                         continue;
 354                                 }
 355
 356                                 name = name.ToUpper ();
 357                                 switch (name) {
 358                                 case "COMMENT":
 359                                         if (cookie.Comment == null)
 360                                                 cookie.Comment = val;
 361                                         break;
 362                                 case "COMMENTURL":
 363                                         if (cookie.CommentUri == null)
 364                                                 cookie.CommentUri = new Uri (val);
 365                                         break;
 366                                 case "DISCARD":
 367                                         cookie.Discard = true;
 368                                         break;
 369                                 case "DOMAIN":
 370                                         if (cookie.Domain == "")
 371                                                 cookie.Domain = val;
 372                                         break;
 373                                 case "MAX-AGE": // RFC Style Set-Cookie2
 374                                         if (cookie.Expires == DateTime.MinValue) {
 375                                                 try {
 376                                                 cookie.Expires = cookie.TimeStamp.AddSeconds (UInt32.Parse (val));
 377                                                 } catch {}
 378                                         }
 379                                         break;
 380                                 case "EXPIRES": // Netscape Style Set-Cookie
 381                                         if (cookie.Expires != DateTime.MinValue)
 382                                                 break;
 383                                         try {
 384                                                 cookie.Expires = DateTime.ParseExact (val, "r", CultureInfo.InvariantCulture);
 385                                         } catch {
 386                                                 try {
 387                                                 cookie.Expires = DateTime.ParseExact (val,
 388                                                                 "ddd, dd'-'MMM'-'yyyy HH':'mm':'ss 'GMT'",
 389                                                                 CultureInfo.InvariantCulture);
 390                                                 } catch {
 391                                                         cookie.Expires = DateTime.Now.AddDays (1);
 392                                                 }
 393                                         }
 394                                         break;
 395                                 case "PATH":
 396                                         cookie.Path = val;
 397                                         break;
 398                                 case "PORT":
 399                                         if (cookie.Port == null)
 400                                                 cookie.Port = val;
 401                                         break;
 402                                 case "SECURE":
 403                                         cookie.Secure = true;
 404                                         break;
 405                                 case "VERSION":
 406                                         try {
 407                                                 cookie.Version = (int) UInt32.Parse (val);
 408                                         } catch {}
 409                                         break;
 410                                 }
 411                         }
 412
 413                         if (cookieCollection == null)
 414                                 cookieCollection = new CookieCollection ();
 415
 416                         if (cookie.Domain == "")
 417                                 cookie.Domain = uri.Host;
 418
 419                         cookieCollection.Add (cookie);
 420                         if (cookie_container != null)
 421                                 cookie_container.Add (uri, cookie);
 422                 }
 423
 424                 void SetCookie2 (string cookies_str)
 425                 {
 426                         string [] cookies = cookies_str.Split (',');
 427
 428                         foreach (string cookie_str in cookies)
 429                                 SetCookie (cookie_str);
 430                 }
 431         }
 432
 433         class CookieParser {
 434                 string header;
 435                 int pos;
 436                 int length;
 437
 438                 public CookieParser (string header) : this (header, 0)
 439                 {
 440                 }
 441
 442                 public CookieParser (string header, int position)
 443                 {
 444                         this.header = header;
 445                         this.pos = position;
 446                         this.length = header.Length;
 447                 }
 448
 449                 public bool GetNextNameValue (out string name, out string val)
 450                 {
 451                         name = null;
 452                         val = null;
 453
 454                         if (pos >= length)
 455                                 return false;
 456
 457                         name = GetCookieName ();
 458                         if (pos < header.Length && header [pos] == '=') {
 459                                 pos++;
 460                                 val = GetCookieValue ();
 461                         }
 462
 463                         if (pos < length && header [pos] == ';')
 464                                 pos++;
 465
 466                         return true;
 467                 }
 468
 469                 string GetCookieName ()
 470                 {
 471                         int k = pos;
 472                         while (k < length && Char.IsWhiteSpace (header [k]))
 473                                 k++;
 474
 475                         int begin = k;
 476                         while (k < length && header [k] != ';' &&  header [k] != '=')
 477                                 k++;
 478
 479                         pos = k;
 480                         return header.Substring (begin, k - begin).Trim ();
 481                 }
 482
 483                 string GetCookieValue ()
 484                 {
 485                         if (pos >= length)
 486                                 return null;
 487
 488                         int k = pos;
 489                         while (k < length && Char.IsWhiteSpace (header [k]))
 490                                 k++;
 491
 492                         int begin;
 493                         if (header [k] == '"'){
 494                                 int j;
 495                                 begin = ++k;
 496
 497                                 while (k < length && header [k] != '"')
 498                                         k++;
 499
 500                                 for (j = k; j < length && header [j] != ';'; j++)
 501                                         ;
 502                                 pos = j;
 503                         } else {
 504                                 begin = k;
 505                                 while (k < length && header [k] != ';')
 506                                         k++;
 507                                 pos = k;
 508                         }
 509
 510                         return header.Substring (begin, k - begin).Trim ();
 511                 }
 512         }
 513 }
 514