how to check the exe file validation

[pankaj semwal]

Hi,
I am using strut2. And uploading the file.

I used the java script to avoid the exe file uploading.

But when i rename it.It get uploaded.

Can any tell me how to avoid exe file validation.

Thanks

[Ankit Garg]

pankaj semwal wrote:But when i rename it.It get uploaded.

What do you mean?? Did you rename A.exe to B.exe or did you change the extension of the file??

[pankaj semwal]

I rename the file.
from a.exe to a.doc.

[Ankit Garg]

Well since you changed the file name, javascript will definitely pass the file as being ok. If you want to check if a file is actually an exe file with a different extension, then you'll have to do something on the server side. You might need to check the first few bytes of the file (called the header) but I don't have any idea about exe file headers...