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