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

   1 //
   2 // System.Net.FileWebResponse
   3 //
   4 // Author:
   5 //   Lawrence Pit (loz@cable.a2000.nl)
   6 //
   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
  29 using System;
  30 using System.IO;
  31 using System.Runtime.Serialization;
  32
  33 namespace System.Net
  34 {
  35         [Serializable]
  36         public class FileWebResponse : WebResponse, ISerializable, IDisposable
  37         {
  38                 private Uri responseUri;
  39                 private FileStream fileStream;
  40                 private long contentLength;
  41                 private WebHeaderCollection webHeaders;
  42                 private bool disposed = false;
  43
  44                 // Constructors
  45
  46                 internal FileWebResponse (Uri responseUri, FileStream fileStream)
  47                 {
  48                         try {
  49                                 this.responseUri = responseUri;
  50                                 this.fileStream = fileStream;
  51                                 this.contentLength = fileStream.Length;
  52                                 this.webHeaders = new WebHeaderCollection ();
  53                                 this.webHeaders.Add ("Content-Length", Convert.ToString (contentLength));
  54                                 this.webHeaders.Add ("Content-Type", "binary/octet-stream");
  55                         } catch (Exception e) {
  56                                 throw new WebException (e.Message, e);
  57                         }
  58                 }
  59
  60                 protected FileWebResponse (SerializationInfo serializationInfo, StreamingContext streamingContext)
  61                 {
  62                         SerializationInfo info = serializationInfo;
  63
  64                         responseUri = (Uri) info.GetValue ("responseUri", typeof (Uri));
  65                         contentLength = info.GetInt64 ("contentLength");
  66                         webHeaders = (WebHeaderCollection) info.GetValue ("webHeaders", typeof (WebHeaderCollection));
  67                 }
  68
  69                 // Properties
  70
  71                 public override long ContentLength {
  72                         get {
  73                                 CheckDisposed ();
  74                                 return this.contentLength;
  75                         }
  76                 }
  77
  78                 public override string ContentType {
  79                         get {
  80                                 CheckDisposed ();
  81                                 return "binary/octet-stream";
  82                         }
  83                 }
  84
  85                 public override WebHeaderCollection Headers {
  86                         get {
  87                                 CheckDisposed ();
  88                                 return this.webHeaders;
  89                         }
  90                 }
  91
  92                 public override Uri ResponseUri {
  93                         get {
  94                                 CheckDisposed ();
  95                                 return this.responseUri;
  96                         }
  97                 }
  98
  99                 // Methods
 100
 101                 void ISerializable.GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)
 102                 {
 103                         SerializationInfo info = serializationInfo;
 104
 105                         info.AddValue ("responseUri", responseUri, typeof (Uri));
 106                         info.AddValue ("contentLength", contentLength);
 107                         info.AddValue ("webHeaders", webHeaders, typeof (WebHeaderCollection));
 108                 }
 109
 110                 public override Stream GetResponseStream()
 111                 {
 112                         CheckDisposed ();
 113                         return this.fileStream;
 114                 }
 115
 116                 // Cleaning up stuff
 117
 118                 ~FileWebResponse ()
 119                 {
 120                         Dispose (false);
 121                 }
 122
 123                 public override void Close()
 124                 {
 125                         ((IDisposable) this).Dispose ();
 126                 }
 127
 128                 void IDisposable.Dispose()
 129                 {
 130                         Dispose (true);
 131
 132                         // see spec, suppress finalization of this object.
 133                         GC.SuppressFinalize (this);
 134                 }
 135
 136                 protected virtual void Dispose (bool disposing)
 137                 {
 138                         if (this.disposed)
 139                                 return;
 140                         this.disposed = true;
 141
 142                         if (disposing) {
 143                                 // release managed resources
 144                                 this.responseUri = null;
 145                                 this.webHeaders = null;
 146                         }
 147
 148                         // release unmanaged resources
 149                         FileStream stream = fileStream;
 150                         fileStream = null;
 151                         if (stream != null)
 152                                 stream.Close (); // also closes webRequest
 153                 }
 154
 155                 private void CheckDisposed ()
 156                 {
 157                         if (disposed)
 158                                 throw new ObjectDisposedException (GetType ().FullName);
 159                 }
 160         }
 161 }