mcs/class/System.Web.Mvc3/Mvc/FileStreamResult.cs

   1 namespace System.Web.Mvc {
   2     using System;
   3     using System.IO;
   4     using System.Web;
   5
   6     public class FileStreamResult : FileResult {
   7
   8         // default buffer size as defined in BufferedStream type
   9         private const int _bufferSize = 0x1000;
  10
  11         public FileStreamResult(Stream fileStream, string contentType)
  12             : base(contentType) {
  13             if (fileStream == null) {
  14                 throw new ArgumentNullException("fileStream");
  15             }
  16
  17             FileStream = fileStream;
  18         }
  19
  20         public Stream FileStream {
  21             get;
  22             private set;
  23         }
  24
  25         protected override void WriteFile(HttpResponseBase response) {
  26             // grab chunks of data and write to the output stream
  27             Stream outputStream = response.OutputStream;
  28             using (FileStream) {
  29                 byte[] buffer = new byte[_bufferSize];
  30
  31                 while (true) {
  32                     int bytesRead = FileStream.Read(buffer, 0, _bufferSize);
  33                     if (bytesRead == 0) {
  34                         // no more data
  35                         break;
  36                     }
  37
  38                     outputStream.Write(buffer, 0, bytesRead);
  39                 }
  40             }
  41         }
  42
  43     }
  44 }