how can i control on submitted Urls if the link is to an image file? and also how can i sanitize any kind of hack attack by that url?
i’m using Codeigniter maybe some good library to control submitted urls ?
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how can i control on submitted Urls if the link is to an image file? and also how can i sanitize any kind of hack attack by that url?
i’m using Codeigniter maybe some good library to control submitted urls ?
Why not let apache (or nginx, etc.) serve your static files for you?
If you serve them through php–CodeIgniter or not–you open yourself up to a much greater opportunity for hacks.
Additionally, you’ll probably run a minimum of 3MB of memory per request through CI, whereas a static file server will usually run at the file’s size or less.
I could keep going. In fact, I will. CI has issues with seemingly random session expiration when serving resources (i.e. images, AJAX, etc.)
Are you still reading this? Serve your static files through apache.
UPDATE:
I assumed by your “submitted URL” language that it was the URI in question. Now it seems to be a question about validating user submitted input data. If it’s a URL, I assume it’s an image on a remote server. For this case, you’ll need to use cURL (or another http wrapper) to download headers for that URL. If the Content-Type header is present, you can use that to determine whether the file is an image.