Hello, Thanks everyone for your interest and replies. Thanks very much. I had one more question. If I use getContentType() of FormFile, does it give the same results on different operating systems that is if the client is using different operating systems. Does the change in server OS affects the getContentType() result.
Thanks once again. --- Craig McClanahan <[EMAIL PROTECTED]> wrote: > If your server is a Unix platform, one thing you > could do is run the > shell command "file" against the uploaded file, and > take a look at the > result. This tool ignores any extension on the > filename, and examines > the content of the file itself against signature > patterns it knows > about. > > Craig > > > > On Sun, 24 Oct 2004 22:30:43 -0400, Bill Siggelkow > <[EMAIL PROTECTED]> wrote: > > I know of no way to deterministically discover > what type of file the > > user sent. There is nothing to prevent a user from > taking a .exe file > > and changing the extension to .txt or anything > else ... others may have > > a better idea ... > > > > > > > > struts lover wrote: > > > > > Thanks Bill. > > > I had another question. What if the user has > some .exe > > > file with .doc extension. I mean > somefile.exe.doc. > > > How do I check the valid file type with the > extension. > > > > > > Thanks once again. > > > > > > --- Bill Siggelkow <[EMAIL PROTECTED]> > wrote: > > > > > > > > >>U can set the accepted mime types on the input > tag; > > >>however, the browser > > >>may not do anything with this information; so in > > >>your ActionForm, I > > >>suggest you validate the type by checking the > > >>extension of the received > > >>file name. > > >> > > >>struts lover wrote: > > >> > > >> > > >>>Hi Everyone, > > >>>I wanted to know what is the best practice for > > >> > > >>file > > >> > > >>>type validation. I want the user to allow to > > >> > > >>upload > > >> > > >>>only certain type of files and disallow all > other > > >>>types. > > >>>I am using Struts FormFile. > > >>> > > >>>Any help would be appreciated. > > >>>Thanks. > > >>> > > >>> > > >>> > > >>>_______________________________ > > >>>Do you Yahoo!? > > >>>Declare Yourself - Register online to vote > today! > > >>>http://vote.yahoo.com > > >> > > >> > > >> > > > > --------------------------------------------------------------------- > > > > > >>To unsubscribe, e-mail: > > >>[EMAIL PROTECTED] > > >>For additional commands, e-mail: > > >>[EMAIL PROTECTED] > > >> > > >> > > > > > > > > > > > > > > > > > > _______________________________ > > > Do you Yahoo!? > > > Declare Yourself - Register online to vote > today! > > > http://vote.yahoo.com > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: > [EMAIL PROTECTED] > > For additional commands, e-mail: > [EMAIL PROTECTED] > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
