Better way to download a binary file?
- by geoff
I have a site where a user can download a file. Some files are extremely large (the largest being 323 MB). When I test it to try and download this file I get an out of memory exception. The only way I know to download the file is below. The reason I'm using the code below is because the URL is encoded and I can't let the user link directly to the file. Is there another way to download this file without having to read the whole thing into a byte array?
FileStream fs = new FileStream(context.Server.MapPath(url), FileMode.Open,
FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
long numBytes = new FileInfo(context.Server.MapPath(url)).Length;
byte[] bytes = br.ReadBytes((int) numBytes);
string filename = Path.GetFileName(url);
context.Response.Buffer = true;
context.Response.Charset = "";
context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
context.Response.ContentType = "application/x-rar-compressed";
context.Response.AddHeader("content-disposition", "attachment;filename=" + filename);
context.Response.BinaryWrite(bytes);
context.Response.Flush();
context.Response.End();
