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 #if NET_2_0\r
  68                 [Obsolete ("Serialization is obsoleted for this type", false)]\r
  69 #endif\r
  70                 protected FileWebResponse (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
  71                 {\r
  72                         SerializationInfo info = serializationInfo;\r
  73 \r
  74                         responseUri = (Uri) info.GetValue ("responseUri", typeof (Uri));\r
  75                         contentLength = info.GetInt64 ("contentLength");\r
  76                         webHeaders = (WebHeaderCollection) info.GetValue ("webHeaders", typeof (WebHeaderCollection));\r
  77                 }\r
  78                 \r
  79                 // Properties\r
  80                 internal bool HasError {\r
  81                         get { return exception != null; }\r
  82                 }\r
  83 \r
  84                 internal Exception Error {\r
  85                         get { return exception; }\r
  86                 }\r
  87                 \r
  88                 public override long ContentLength {\r
  89                         get {\r
  90                                 CheckDisposed ();\r
  91                                 return this.contentLength;\r
  92                         }\r
  93                 }\r
  94                 \r
  95                 public override string ContentType {\r
  96                         get {\r
  97                                 CheckDisposed ();\r
  98                                 return "application/octet-stream";\r
  99                         }\r
 100                 }\r
 101                 \r
 102                 public override WebHeaderCollection Headers {\r
 103                         get {\r
 104                                 CheckDisposed ();\r
 105                                 return this.webHeaders;\r
 106                         }\r
 107                 }\r
 108                 \r
 109                 public override Uri ResponseUri {\r
 110                         get {\r
 111                                 CheckDisposed ();\r
 112                                 return this.responseUri;\r
 113                         }\r
 114                 }\r
 115 \r
 116                 // Methods\r
 117 \r
 118                 void ISerializable.GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
 119                 {\r
 120                         GetObjectData (serializationInfo, streamingContext);\r
 121                 }\r
 122 \r
 123 #if NET_2_0\r
 124                 protected override\r
 125 #endif\r
 126                 void GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
 127                 {\r
 128                         SerializationInfo info = serializationInfo;\r
 129 \r
 130                         info.AddValue ("responseUri", responseUri, typeof (Uri));\r
 131                         info.AddValue ("contentLength", contentLength);\r
 132                         info.AddValue ("webHeaders", webHeaders, typeof (WebHeaderCollection));\r
 133                 }\r
 134 \r
 135                 public override Stream GetResponseStream()\r
 136                 {\r
 137                         CheckDisposed ();\r
 138                         return this.fileStream;\r
 139                 }\r
 140                                 \r
 141                 // Cleaning up stuff\r
 142                 \r
 143                 ~FileWebResponse ()\r
 144                 {\r
 145                         Dispose (false);\r
 146                 }               \r
 147                 \r
 148                 public override void Close()\r
 149                 {\r
 150                         ((IDisposable) this).Dispose ();\r
 151                 }\r
 152 \r
 153 #if TARGET_JVM //enable overrides for extenders\r
 154                 public override void Dispose()\r
 155 #else\r
 156                 void IDisposable.Dispose()\r
 157 #endif\r
 158                 {\r
 159                         Dispose (true);\r
 160                         \r
 161                         // see spec, suppress finalization of this object.\r
 162                         GC.SuppressFinalize (this);  \r
 163                 }\r
 164                 \r
 165 #if !NET_2_0\r
 166                 protected virtual\r
 167 #endif\r
 168                 void Dispose (bool disposing)\r
 169                 {\r
 170                         if (this.disposed)\r
 171                                 return;\r
 172                         this.disposed = true;\r
 173                         \r
 174                         if (disposing) {\r
 175                                 // release managed resources\r
 176                                 this.responseUri = null;\r
 177                                 this.webHeaders = null;\r
 178                         }\r
 179                         \r
 180                         // release unmanaged resources\r
 181                         FileStream stream = fileStream;\r
 182                         fileStream = null;\r
 183                         if (stream != null)\r
 184                                 stream.Close (); // also closes webRequest\r
 185                 }\r
 186                 \r
 187                 private void CheckDisposed ()\r
 188                 {\r
 189                         if (disposed)\r
 190                                 throw new ObjectDisposedException (GetType ().FullName);\r
 191                 }               \r
 192         }\r
 193 }\r