Restrictions by file extension in server 2008?

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Restrictions by file extension in server 2008?

Hi,

I am having problems downloading files possibly due to the file extensions not matching the actual file. What is happening is the File.Exists check is returning false for these even though the named file does exist. Is anybody aware of anything in IIS or even IE which would cause this. I have seen this with .txt, .exe. and .avi files. The .avi works of as long as the file really is an avi and not renamed from something else.

Please advise any knowledge on this subject.

Thank you,

James

Are you doing this within server-side ASP.NET code? If so, you may need to use Server.MapPath or assign the appropriate permissions to be able to access the file's directory.

Please submit code to show what you're trying to do.

David Andres 2009-09-06 04:59:54

Please see my other post at: http://stackoverflow.com/questions/1384649/how-to-retrive-and-download-server-files-file-exists-and-urlYes, server side code

James 2009-09-06 05:01:52

What I am doing is building a list of URL's which I pass to an ActiveX download control. But I am getting file does not exist on all my test files except for a couple .avi's

James 2009-09-06 05:05:40

Are all of these files within the same directory? In any case, check your permissions. Make sure the ASPNET user has access to the folders you're trying to retrieve files from.

David Andres 2009-09-06 05:13:25

Yes, All are in the same folder so I would think since the .avi files are working that permissions must be ok. I will check. Thanks

James 2009-09-06 13:41:13

The folder has full permissions so that isn't it....

James 2009-09-06 15:24:22

Bear in mind that the Everyone user does not include ASPNET, so you'll need to give that user permissions separately. Once done, you can view Effective Permissions on the "missing" files to see if ASPNET can access it. Also, what OS is the server running against, and does it differ from your local environment?

David Andres 2009-09-06 15:44:45

also...make doubly sure that there's nothing added/removed from the file names that are being passed to File.Exists...

David Andres 2009-09-06 15:49:43

See my new post for what the problem is.http://stackoverflow.com/questions/1386338/why-is-fileinfo-showing-an-extra-file-extension

James 2009-09-06 18:33:50

+1 A:

Ok, we have an answer.... I actually had double file extensions on the files that were not working but the option to hide known extensions was turned on (I guess by default). The .avi files looked the same as the others so I guess it was considering .avi to be an "unknown" file type. Whatever!

The answer is on my other post here:

http://stackoverflow.com/questions/1386338/why-is-fileinfo-showing-an-extra-file-extension

Thanks, James

James 2009-09-06 19:26:50

ansaurus

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Restrictions by file extension in server 2008?

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