Downloading 200MB+ files and errors in .NET

[blantz]

I am using Forms Authentication to force a login to a support folder,
where there are large .exe and .zip files for download. In my
web.config file, i am blocking these file extensions with a
httpHandler

<httpHandlers>
<add verb="*" path="*.exe" type="MyHandler.NewHandler,httpHandler"/>
<add verb="*" path="*.zip" type="MyHandler.NewHandler,httpHandler"/>
</httpHandlers>

The code that downloads the files in the handler is...

string strFileName =
context.Request.MapPath(context.Request.ServerVariables["PATH_INFO"]);
FileInfo myFile = new FileInfo(strFileName);
objResponse.AddHeader("Content-Disposition","attachment; filename=" +
myFile.Name);
objResponse.ContentType = "application/octet-stream";
objResponse.TransmitFile(myFile.Name);
objResponse.Flush();
objResponse.End();

My problem is that when you are downloading a file, part way through
an error message appears saying, "The connection with the server has
been reset" or the file will seem to have downloaded correct, but only
40 or 50 mb's have been downloaded.

I thought it may be a timeout issue, so i made this change to the
web.config file... nothing changed though.

<system.web>
<httpRuntime executionTimeout="36000" />
</system.web>

 

[Guest]

Check this article:
http://support.microsoft.com/default.aspx?scid=kb;en-us;812406&Product=aspnet

Anyways, I tried the code they provided and I didn't like it. Basically, it
will host up the server into a very long loop if the client clicked Cancel
but didn't close the browser.

Hope that helps..

 

[lantz]

Thanks for the reply... but we already tried that way. Instead of
Response.WriteFile we are using Response.TransmitFile which just became
available several weeks ago.

Any other thoughts?

 

[Guest]

Any other thoughts?

You might be interested in this article:
http://www.devx.com/dotnet/Article/22533

It provides a way of downloading a file chunk-wise, AND being enabling your
application to resume broken downloads.