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 using System;\r
   9 using System.IO;\r
  10 using System.Runtime.Serialization;\r
  11 \r
  12 namespace System.Net \r
  13 {\r
  14         [Serializable]\r
  15         public class FileWebResponse : WebResponse, ISerializable, IDisposable\r
  16         {\r
  17                 private Uri responseUri;\r
  18                 private FileStream fileStream;\r
  19                 private long contentLength;\r
  20                 private WebHeaderCollection webHeaders;\r
  21                 private bool disposed = false;\r
  22                 \r
  23                 // Constructors\r
  24                 \r
  25                 internal FileWebResponse (Uri responseUri, FileStream fileStream)\r
  26                 {\r
  27                         try {\r
  28                                 this.responseUri = responseUri;\r
  29                                 this.fileStream = fileStream;\r
  30                                 this.contentLength = fileStream.Length;\r
  31                                 this.webHeaders = new WebHeaderCollection ();\r
  32                                 this.webHeaders.Add ("Content-Length", Convert.ToString (contentLength));\r
  33                                 this.webHeaders.Add ("Content-Type", "binary/octet-stream");\r
  34                         } catch (Exception e) {\r
  35                                 throw new WebException (e.Message, e);\r
  36                         }\r
  37                 }\r
  38                 \r
  39                 protected FileWebResponse (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
  40                 {\r
  41                         SerializationInfo info = serializationInfo;\r
  42 \r
  43                         responseUri = (Uri) info.GetValue ("responseUri", typeof (Uri));\r
  44                         contentLength = info.GetInt64 ("contentLength");\r
  45                         webHeaders = (WebHeaderCollection) info.GetValue ("webHeaders", typeof (WebHeaderCollection));\r
  46                 }\r
  47                 \r
  48                 // Properties\r
  49                 \r
  50                 public override long ContentLength {            \r
  51                         get {\r
  52                                 CheckDisposed ();\r
  53                                 return this.contentLength;\r
  54                         }\r
  55                 }\r
  56                 \r
  57                 public override string ContentType {            \r
  58                         get {\r
  59                                 CheckDisposed ();\r
  60                                 return "binary/octet-stream";\r
  61                         }\r
  62                 }\r
  63                 \r
  64                 public override WebHeaderCollection Headers {           \r
  65                         get {\r
  66                                 CheckDisposed ();\r
  67                                 return this.webHeaders;\r
  68                         }\r
  69                 }\r
  70                 \r
  71                 public override Uri ResponseUri {               \r
  72                         get {\r
  73                                 CheckDisposed ();\r
  74                                 return this.responseUri;\r
  75                         }\r
  76                 }               \r
  77 \r
  78                 // Methods\r
  79 \r
  80                 void ISerializable.GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)\r
  81                 {\r
  82                         SerializationInfo info = serializationInfo;\r
  83 \r
  84                         info.AddValue ("responseUri", responseUri, typeof (Uri));\r
  85                         info.AddValue ("contentLength", contentLength);\r
  86                         info.AddValue ("webHeaders", webHeaders, typeof (WebHeaderCollection));\r
  87                 }               \r
  88 \r
  89                 public override Stream GetResponseStream()\r
  90                 {\r
  91                         CheckDisposed ();\r
  92                         return this.fileStream;\r
  93                 }\r
  94                                 \r
  95                 // Cleaning up stuff\r
  96                 \r
  97                 ~FileWebResponse ()\r
  98                 {\r
  99                         Dispose (false);\r
 100                 }               \r
 101                 \r
 102                 public override void Close()\r
 103                 {\r
 104                         ((IDisposable) this).Dispose ();\r
 105                 }\r
 106 \r
 107                 void IDisposable.Dispose()\r
 108                 {\r
 109                         Dispose (true);\r
 110                         \r
 111                         // see spec, suppress finalization of this object.\r
 112                         GC.SuppressFinalize (this);  \r
 113                 }\r
 114                 \r
 115                 protected virtual void Dispose (bool disposing)\r
 116                 {\r
 117                         if (this.disposed)\r
 118                                 return;\r
 119                         this.disposed = true;\r
 120                         \r
 121                         if (disposing) {\r
 122                                 // release managed resources\r
 123                                 this.responseUri = null;\r
 124                                 this.webHeaders = null;\r
 125                         }\r
 126                         \r
 127                         // release unmanaged resources\r
 128                         FileStream stream = fileStream;\r
 129                         fileStream = null;\r
 130                         if (stream != null)\r
 131                                 stream.Close (); // also closes webRequest\r
 132                 }\r
 133                 \r
 134                 private void CheckDisposed ()\r
 135                 {\r
 136                         if (disposed)\r
 137                                 throw new ObjectDisposedException (GetType ().FullName);\r
 138                 }               \r
 139         }\r
 140 }\r