mcs/class/System/System.Net/FileWebResponse.cs

   1 //\r
   2 // System.Net.FileWebResponse\r
   3 //\r
   4 // Author:\r
   5 //   Lawrence Pit (loz@cable.a2000.nl)\r
   6 //\r
   7 \r
   8 //\r
   9 // Permission is hereby granted, free of charge, to any person obtaining\r
  10 // a copy of this software and associated documentation files (the\r
  11 // "Software"), to deal in the Software without restriction, including\r
  12 // without limitation the rights to use, copy, modify, merge, publish,\r
  13 // distribute, sublicense, and/or sell copies of the Software, and to\r
  14 // permit persons to whom the Software is furnished to do so, subject to\r
  15 // the following conditions:\r
  16 // \r
  17 // The above copyright notice and this permission notice shall be\r
  18 // included in all copies or substantial portions of the Software.\r
  19 // \r
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\r
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\r
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\r
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  27 //\r
  28 \r
  29 using System;\r
  30 using System.IO;\r
  31 using System.Runtime.Serialization;\r
  32 \r
  33 namespace System.Net \r
  34 {\r
  35         [Serializable]\r
  36         public class FileWebResponse : WebResponse, ISerializable, IDisposable\r
  37         {\r
  38                 private Uri responseUri;\r
  39                 private FileStream fileStream;\r
  40                 private long contentLength;\r
  41                 private WebHeaderCollection webHeaders;\r
  42                 private bool disposed;\r
  43                 Exception exception;\r
  44                 \r
  45                 // Constructors\r
  46                 \r
  47                 internal FileWebResponse (Uri responseUri, FileStream fileStream)\r
  48                 {\r
  49                         try {\r
  50                                 this.responseUri = responseUri;\r
  51                                 this.fileStream = fileStream;\r
  52                                 this.contentLength = fileStream.Length;\r
  53                                 this.webHeaders = new WebHeaderCollection ();\r
  54                                 this.webHeaders.Add ("Content-Length", Convert.ToString (contentLength));\r
  55                                 this.webHeaders.Add ("Content-Type", "application/octet-stream");\r
  56                         } catch (Exception e) {\r
  57                                 throw new WebException (e.Message, e);\r
  58                         }\r
  59                 }\r
  60 \r
  61                 internal FileWebResponse (Uri responseUri, WebException exception)\r
  62                 {\r
  63                         this.responseUri = responseUri;\r
  64                         this.exception = exception;\r
  65                 }\r
  66                 \r
  67                 [Obsolete ("Serialization is obsoleted for this type", false)]\r
  68                 protected FileWebResponse (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
  69                 {\r
  70                         SerializationInfo info = serializationInfo;\r
  71 \r
  72                         responseUri = (Uri) info.GetValue ("responseUri", typeof (Uri));\r
  73                         contentLength = info.GetInt64 ("contentLength");\r
  74                         webHeaders = (WebHeaderCollection) info.GetValue ("webHeaders", typeof (WebHeaderCollection));\r
  75                 }\r
  76                 \r
  77                 // Properties\r
  78                 internal bool HasError {\r
  79                         get { return exception != null; }\r
  80                 }\r
  81 \r
  82                 internal Exception Error {\r
  83                         get { return exception; }\r
  84                 }\r
  85                 \r
  86                 public override long ContentLength {\r
  87                         get {\r
  88                                 CheckDisposed ();\r
  89                                 return this.contentLength;\r
  90                         }\r
  91                 }\r
  92                 \r
  93                 public override string ContentType {\r
  94                         get {\r
  95                                 CheckDisposed ();\r
  96                                 return "application/octet-stream";\r
  97                         }\r
  98                 }\r
  99                 \r
 100                 public override WebHeaderCollection Headers {\r
 101                         get {\r
 102                                 CheckDisposed ();\r
 103                                 return this.webHeaders;\r
 104                         }\r
 105                 }\r
 106                 \r
 107                 public override Uri ResponseUri {\r
 108                         get {\r
 109                                 CheckDisposed ();\r
 110                                 return this.responseUri;\r
 111                         }\r
 112                 }\r
 113 \r
 114                 // Methods\r
 115 \r
 116                 void ISerializable.GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
 117                 {\r
 118                         GetObjectData (serializationInfo, streamingContext);\r
 119                 }\r
 120 \r
 121                 protected override void GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
 122                 {\r
 123                         SerializationInfo info = serializationInfo;\r
 124 \r
 125                         info.AddValue ("responseUri", responseUri, typeof (Uri));\r
 126                         info.AddValue ("contentLength", contentLength);\r
 127                         info.AddValue ("webHeaders", webHeaders, typeof (WebHeaderCollection));\r
 128                 }\r
 129 \r
 130                 public override Stream GetResponseStream()\r
 131                 {\r
 132                         CheckDisposed ();\r
 133                         return this.fileStream;\r
 134                 }\r
 135                                 \r
 136                 // Cleaning up stuff\r
 137                 \r
 138                 ~FileWebResponse ()\r
 139                 {\r
 140                         Dispose (false);\r
 141                 }               \r
 142                 \r
 143                 public override void Close()\r
 144                 {\r
 145                         ((IDisposable) this).Dispose ();\r
 146                 }\r
 147 \r
 148                 void IDisposable.Dispose()\r
 149                 {\r
 150                         Dispose (true);\r
 151                         \r
 152                         // see spec, suppress finalization of this object.\r
 153                         GC.SuppressFinalize (this);  \r
 154                 }\r
 155                 \r
 156                 protected override\r
 157                 void Dispose (bool disposing)\r
 158                 {\r
 159                         if (this.disposed)\r
 160                                 return;\r
 161                         this.disposed = true;\r
 162                         \r
 163                         if (disposing) {\r
 164                                 // release managed resources\r
 165                                 this.responseUri = null;\r
 166                                 this.webHeaders = null;\r
 167                         }\r
 168                         \r
 169                         // release unmanaged resources\r
 170                         FileStream stream = fileStream;\r
 171                         fileStream = null;\r
 172                         if (stream != null)\r
 173                                 stream.Close (); // also closes webRequest\r
 174                         base.Dispose (disposing);\r
 175                 }\r
 176                 \r
 177                 private void CheckDisposed ()\r
 178                 {\r
 179                         if (disposed)\r
 180                                 throw new ObjectDisposedException (GetType ().FullName);\r
 181                 }               \r
 182         }\r
 183 }\r