ASP.NET Accessing shares

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,

I'm working on an ASP.NET application that allows users to upload images to
a central storage area and view using a HTTP handler.

This works great if the files are stored on a local drive on the web server.
The problem I have is that when I move this storage area to a share on
another machine with full permissions for everyone I still get
System.IO.FileNotFoundException.

Are there any other additional other permissions for the ASPNET account on
the web server that need to be set before I can access remote shares?

Many thanks
 
Serge,

The machines are not part of a domain so the ASPNET account is only on the
web server and therefore I cannot give permissions to the user directly on
the share.

Going to read article posted by flipdoubt.

Thanks
 
Oliver said:
Hi,

I'm working on an ASP.NET application that allows users to upload
images to a central storage area and view using a HTTP handler.

This works great if the files are stored on a local drive on the web
server. The problem I have is that when I move this storage area to a
share on another machine with full permissions for everyone I still
get System.IO.FileNotFoundException.

Are there any other additional other permissions for the ASPNET
account on the web server that need to be set before I can access
remote shares?
Click to expand...

In a scenario like this, you should use P/Invoke to do code-level
impersonation. You can then impersonate a user (or group) who has access to
that share.

http://support.microsoft.com/default.aspx?scid=KB;EN-US;306158

See "Impersonate a specific user in code".

--
Jim Cheshire
JIMCO Software
http://www.jimcosoftware.com

FrontPage add-ins for FrontPage 2000 - 2003
 
First, the FileNotFoundException doesn't indicate a problem with
permissions. It means that the file cannot be found. In other words, your
path is wrong.

The best way to access a network share is to use a UNC path (e.g.
\\192.168.1.1\c$\somefolder\somefile.txt).

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
Neither a follower nor a lender be.
 
Kevin said:
First, the FileNotFoundException doesn't indicate a problem with
permissions. It means that the file cannot be found. In other words,
your path is wrong.
Click to expand...

It is possible to see a FileNotFoundException when you are experiencing
permissions problems.

--
Jim Cheshire
JIMCO Software
http://www.jimcosoftware.com

FrontPage add-ins for FrontPage 2000 - 2003
 
I agree, I can open the file by pasting the UNC into explorer no problem -
just not through ASP.NET
 
Jim,

I was really trying to avoid having modify the application to impersonate a
user (not lazy just time constraints). So I just opened the share for full
access by everyone but no luck. At this rate it will quicker to re-write the
code.
 
Oliver said:
Jim,

I was really trying to avoid having modify the application to
impersonate a user (not lazy just time constraints). So I just opened
the share for full access by everyone but no luck. At this rate it
will quicker to re-write the code.
Click to expand...

If you are not impersonating, that means that the worker process account is
being used to access the share. It's possible that it's failing because of
that. I would set a password for the process account and then configure an
identical account on the file server. This will allow for pass-through
authentication.

--
Jim Cheshire
JIMCO Software
http://www.jimcosoftware.com

FrontPage add-ins for FrontPage 2000 - 2003
 
I was not aware of that. I suppose that the permissions exception might be
found in the InnerException. At any rate, I stand corrected!

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
Neither a follower nor a lender be.
 
Hi Oliver,

Apparently I was mistaken. If it is indeed a permissions issue, your ASP.Net
app may be running under a local machine account, rather then a
domain-accessible account. The following MSDN article will provide you with
the information you need to access a network share via the ASP.Net user
account:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetsec/html/THCMCh19.asp

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
Neither a follower nor a lender be.
 
Back
Top