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.Globalization;
  35 using System.IO;
  36 using System.Net.Sockets;
  37 using System.Runtime.Serialization;
  38 using System.Text;
  39
  40 namespace System.Net
  41 {
  42         [Serializable]
  43         public class HttpWebResponse : WebResponse, ISerializable, IDisposable
  44         {
  45                 Uri uri;
  46                 WebHeaderCollection webHeaders;
  47                 CookieCollection cookieCollection;
  48                 string method;
  49                 Version version;
  50                 HttpStatusCode statusCode;
  51                 string statusDescription;
  52                 long contentLength = -1;
  53                 string contentType;
  54
  55                 bool disposed = false;
  56                 Stream stream;
  57
  58                 // Constructors
  59
  60                 internal HttpWebResponse (Uri uri, string method, WebConnectionData data, bool cookiesSet)
  61                 {
  62                         this.uri = uri;
  63                         this.method = method;
  64                         webHeaders = data.Headers;
  65                         version = data.Version;
  66                         statusCode = (HttpStatusCode) data.StatusCode;
  67                         statusDescription = data.StatusDescription;
  68                         stream = data.stream;
  69                         if (cookiesSet) {
  70                                 FillCookies ();
  71                         } else if (webHeaders != null) {
  72                                 webHeaders.RemoveInternal ("Set-Cookie");
  73                                 webHeaders.RemoveInternal ("Set-Cookie2");
  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                                 return webHeaders ["Content-Encoding"];
 119                         }
 120                 }
 121
 122                 public override long ContentLength {
 123                         get {
 124                                 CheckDisposed ();
 125                                 if (contentLength != -1)
 126                                         return contentLength;
 127
 128                                 try {
 129                                         contentLength = (long) UInt64.Parse (webHeaders ["Content-Length"]);
 130                                 } catch (Exception) {
 131                                         return -1;
 132                                 }
 133
 134                                 return contentLength;
 135                         }
 136                 }
 137
 138                 public override string ContentType {
 139                         get {
 140                                 CheckDisposed ();
 141                                 if (contentType == null)
 142                                         contentType = webHeaders ["Content-Type"];
 143
 144                                 return contentType;
 145                         }
 146                 }
 147
 148                 public CookieCollection Cookies {
 149                         get {
 150                                 CheckDisposed ();
 151
 152                                 if (cookieCollection == null)
 153                                         cookieCollection = new CookieCollection ();
 154                                 return cookieCollection;
 155                         }
 156                         set {
 157                                 CheckDisposed ();
 158                                 cookieCollection = value;
 159                         }
 160                 }
 161
 162                 public override WebHeaderCollection Headers {
 163                         get {
 164                                 CheckDisposed ();
 165                                 return webHeaders;
 166                         }
 167                 }
 168
 169                 public DateTime LastModified {
 170                         get {
 171                                 CheckDisposed ();
 172                                 try {
 173                                         string dtStr = webHeaders ["Last-Modified"];
 174                                         return MonoHttpDate.Parse (dtStr);
 175                                 } catch (Exception) {
 176                                         return DateTime.Now;
 177                                 }
 178                         }
 179                 }
 180
 181                 public string Method {
 182                         get {
 183                                 CheckDisposed ();
 184                                 return method;
 185                         }
 186                 }
 187
 188                 public Version ProtocolVersion {
 189                         get {
 190                                 CheckDisposed ();
 191                                 return version;
 192                         }
 193                 }
 194
 195                 public override Uri ResponseUri {
 196                         get {
 197                                 CheckDisposed ();
 198                                 return uri;
 199                         }
 200                 }
 201
 202                 public string Server {
 203                         get {
 204                                 CheckDisposed ();
 205                                 return webHeaders ["Server"];
 206                         }
 207                 }
 208
 209                 public HttpStatusCode StatusCode {
 210                         get {
 211                                 CheckDisposed ();
 212                                 return statusCode;
 213                         }
 214                 }
 215
 216                 public string StatusDescription {
 217                         get {
 218                                 CheckDisposed ();
 219                                 return statusDescription;
 220                         }
 221                 }
 222
 223                 // Methods
 224
 225                 public override int GetHashCode ()
 226                 {
 227                         CheckDisposed ();
 228                         return base.GetHashCode ();
 229                 }
 230
 231                 public string GetResponseHeader (string headerName)
 232                 {
 233                         CheckDisposed ();
 234                         string value = webHeaders [headerName];
 235                         return (value != null) ? value : "";
 236                 }
 237
 238                 public override Stream GetResponseStream ()
 239                 {
 240                         CheckDisposed ();
 241                         if (stream == null)
 242                                 return Stream.Null;
 243                         if (0 == String.Compare (method, "HEAD", true)) // see par 4.3 & 9.4
 244                                 return Stream.Null;
 245
 246                         return stream;
 247                 }
 248
 249                 void ISerializable.GetObjectData (SerializationInfo serializationInfo,
 250                                                   StreamingContext streamingContext)
 251                 {
 252                         SerializationInfo info = serializationInfo;
 253
 254                         info.AddValue ("uri", uri);
 255                         info.AddValue ("contentLength", contentLength);
 256                         info.AddValue ("contentType", contentType);
 257                         info.AddValue ("method", method);
 258                         info.AddValue ("statusDescription", statusDescription);
 259                         info.AddValue ("cookieCollection", cookieCollection);
 260                         info.AddValue ("version", version);
 261                         info.AddValue ("statusCode", statusCode);
 262                 }
 263
 264
 265                 // Cleaning up stuff
 266
 267                 public override void Close ()
 268                 {
 269                         ((IDisposable) this).Dispose ();
 270                 }
 271
 272                 void IDisposable.Dispose ()
 273                 {
 274                         Dispose (true);
 275                         GC.SuppressFinalize (this);
 276                 }
 277
 278                 protected virtual void Dispose (bool disposing)
 279                 {
 280                         if (this.disposed)
 281                                 return;
 282                         this.disposed = true;
 283
 284                         if (disposing) {
 285                                 // release managed resources
 286                                 uri = null;
 287                                 webHeaders = null;
 288                                 cookieCollection = null;
 289                                 method = null;
 290                                 version = null;
 291                                 statusDescription = null;
 292                         }
 293
 294                         // release unmanaged resources
 295                         Stream st = stream;
 296                         stream = null;
 297                         if (st != null) {
 298                                 WebConnectionStream wce = st as WebConnectionStream;
 299                                 if (wce != null) {
 300                                         try {
 301                                                 wce.ReadAll ();
 302                                         } catch {}
 303                                 }
 304                                 st.Close ();
 305                         }
 306                 }
 307
 308                 private void CheckDisposed ()
 309                 {
 310                         if (disposed)
 311                                 throw new ObjectDisposedException (GetType ().FullName);
 312                 }
 313
 314                 void FillCookies ()
 315                 {
 316                         if (webHeaders == null)
 317                                 return;
 318
 319                         string [] values = webHeaders.GetValues ("Set-Cookie");
 320                         if (values != null) {
 321                                 foreach (string va in values)
 322                                         SetCookie (va);
 323                         }
 324
 325                         values = webHeaders.GetValues ("Set-Cookie2");
 326                         if (values != null) {
 327                                 foreach (string va in values)
 328                                         SetCookie2 (va);
 329                         }
 330                 }
 331
 332                 void SetCookie (string header)
 333                 {
 334                         string [] name_values = header.Trim ().Split (';');
 335                         int length = name_values.Length;
 336                         Cookie cookie = null;
 337                         int pos;
 338                         for (int i = 0; i < length; i++) {
 339                                 pos = 0;
 340                                 string name_value = name_values [i].Trim ();
 341                                 if (name_value == "")
 342                                         continue;
 343
 344                                 string name = GetCookieName (name_value, name_value.Length, ref pos);
 345                                 string value = GetCookieValue (name_value, name_value.Length, ref pos);
 346                                 if (cookie == null) {
 347                                         cookie = new Cookie (name, value);
 348                                         continue;
 349                                 }
 350
 351                                 name = name.ToUpper ();
 352                                 switch (name) {
 353                                 case "COMMENT":
 354                                         if (cookie.Comment == null)
 355                                                 cookie.Comment = value;
 356                                         break;
 357                                 case "COMMENTURL":
 358                                         if (cookie.CommentUri == null)
 359                                                 cookie.CommentUri = new Uri (value);
 360                                         break;
 361                                 case "DISCARD":
 362                                         cookie.Discard = true;
 363                                         break;
 364                                 case "DOMAIN":
 365                                         if (cookie.Domain == "")
 366                                                 cookie.Domain = value;
 367                                         break;
 368                                 case "MAX-AGE": // RFC Style Set-Cookie2
 369                                         if (cookie.Expires == DateTime.MinValue)
 370                                                 cookie.Expires = cookie.TimeStamp.AddSeconds (Int32.Parse (value));
 371                                         break;
 372                                 case "EXPIRES": // Netscape Style Set-Cookie
 373                                         if (cookie.Expires != DateTime.MinValue)
 374                                                 break;
 375                                         try {
 376                                                 cookie.Expires = DateTime.ParseExact (value, "r", CultureInfo.InvariantCulture);
 377                                         } catch {
 378                                                 try {
 379                                                 cookie.Expires = DateTime.ParseExact (value,
 380                                                                 "ddd, dd'-'MMM'-'yyyy HH':'mm':'ss 'GMT'",
 381                                                                 CultureInfo.InvariantCulture);
 382                                                 } catch {
 383                                                         cookie.Expires = DateTime.Now.AddDays (1);
 384                                                 }
 385                                         }
 386                                         break;
 387                                 case "PATH":
 388                                         cookie.Path = value;
 389                                         break;
 390                                 case "PORT":
 391                                         if (cookie.Port == null)
 392                                                 cookie.Port = value;
 393                                         break;
 394                                 case "SECURE":
 395                                         cookie.Secure = true;
 396                                         break;
 397                                 case "VERSION":
 398                                         cookie.Version = Int32.Parse (value);
 399                                         break;
 400                                 }
 401                         }
 402
 403                         if (cookieCollection == null)
 404                                 cookieCollection = new CookieCollection ();
 405
 406                         if (cookie.Domain == "")
 407                                 cookie.Domain = uri.Host;
 408
 409                         cookieCollection.Add (cookie);
 410                 }
 411
 412                 void SetCookie2 (string cookies_str)
 413                 {
 414                         string [] cookies = cookies_str.Split (',');
 415
 416                         foreach (string cookie_str in cookies)
 417                                 SetCookie (cookie_str);
 418                 }
 419
 420                 static string GetCookieValue (string str, int length, ref int i)
 421                 {
 422                         if (i >= length)
 423                                 return null;
 424
 425                         int k = i;
 426                         while (k < length && Char.IsWhiteSpace (str [k]))
 427                                 k++;
 428
 429                         int begin = k;
 430                         while (k < length && str [k] != ';')
 431                                 k++;
 432
 433                         i = k;
 434                         return str.Substring (begin, i - begin).Trim ();
 435                 }
 436
 437                 static string GetCookieName (string str, int length, ref int i)
 438                 {
 439                         if (i >= length)
 440                                 return null;
 441
 442                         int k = i;
 443                         while (k < length && Char.IsWhiteSpace (str [k]))
 444                                 k++;
 445
 446                         int begin = k;
 447                         while (k < length && str [k] != ';' &&  str [k] != '=')
 448                                 k++;
 449
 450                         i = k + 1;
 451                         return str.Substring (begin, k - begin).Trim ();
 452                 }
 453         }
 454 }
 455