Secure file field, which allows you to restrict uploaded file extensions. It may be useful for user-uploaded files (attachments).
This package adds model and forms field. What this fields does:
- restricts allowed file extensions (for example: only *.pdf files)
- checks file extensions is correct for sent content-type
- checks sent content type is correct for file content (detects by libmagic)
- checks uploaded file with anti-virus software
The package can be installed using:
pip install django-safe-filefield
Add the following settings:
INSTALLED_APPS += [ 'safe_filefield', ]
django-safe-filefield requires libmagic to be installed.
Simply add field to your model:
from safe_filefield.models import SafeFileField class MyModel(models.Model): attachment = SafeFileField( allowed_extensions=('xls', 'xlsx', 'csv') )
Or directly to your form:
from safe_filefield.forms import SafeFileField class MyForm(forms.Form): attachment = SafeFileField( allowed_extensions=('xls', 'xlsx', 'csv') )
Content type checking
To check actual file content type, use check_content_type argument. This will prevent attacker from uploading malicious file just by changing its extension.
class MyForm(forms.Form): attachment = SafeFileField( check_content_type=True )
To use this functionality you should have clamd daemon.
This package has ability to check uploaded file with ClamAV antivirus.
To use anti-virus protection simply enable it in your form or model definition:
from safe_filefield.forms import SafeFileField class MyForm(forms.Form): attachment = SafeFileField( scan_viruses=True, )
You can configure some ClamAV settings:
CLAMAV_SOCKET = 'unix://tmp/clamav.sock' # or tcp://127.0.0.1:3310 CLAMAV_TIMEOUT = 30 # 30 seconds timeout, None by default which means infinite
If you have any valuable contribution, suggestion or idea, please let me know as well because I will look into it.
Pull requests are welcome.