On Aug 2, 4:25 pm, Jarek Zgoda <[EMAIL PROTECTED]> wrote: > André napisa³(a): > > >>>> Other than installing PIL, is there a "simple" way using Python only > >>>> to determine if a file is a valid image file? > >>>> I'd be happy if I could at least identify valid images files for gif, > >>>> jpeg and png. Pointers to existing modules or examples would be > >>>> appreciated. > >>>> The reason why I'd prefer not using PIL is that I'd like to bundle > >>>> such a function/module in my app. > >>>> André > >>> I should have added: I'm interesting in validating the file *content* > >>> - not the filename :-) > >> Is the module imghdr enough for your needs? > > > Yes, thanks. > > Be aware that broken images (i.e. partially downloaded) in many cases > pass the imghdr.what() test. This function checks for patterns in files, > just like "file" utility. >
That's all I need; I'm not concerned about broken images. I am writing a web app and need to prevent someone using redirection to send malicious content when I'm supposedly loading an image file. So, what I plan to do is open the file using urlopen, preload the image and see if it is valid; if so, I pass it on to the browser. To find out more, look for "redirect" on the following page (it is the first occurence of that word) http://ha.ckers.org/xss.html > -- > Jarek Zgodahttp://jpa.berlios.de/ -- http://mail.python.org/mailman/listinfo/python-list
