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36 lines
1.2 KiB
Python
36 lines
1.2 KiB
Python
# validators.py
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#
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# validators for file uploads, etc.
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from django.conf import settings
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# TODO: can we use the builtin Django validator instead?
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# see:
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# https://docs.djangoproject.com/en/4.0/ref/validators/#fileextensionvalidator
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def validate_file_extension(value):
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from django.core.exceptions import ValidationError
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import os
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ext = os.path.splitext(value.name)[1] # [0] returns path+filename
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# TODO: we might improve this with more thorough checks of file types
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# rather than just the extensions.
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# check if VALID_EXTENSIONS is defined in settings.py
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# if not use defaults
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if hasattr(settings, 'VALID_EXTENSIONS'):
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valid_extensions = settings.VALID_EXTENSIONS
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else:
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valid_extensions = ['.txt', '.asc', '.htm', '.html',
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'.pdf', '.doc', '.docx', '.odt', '.jpg', '.png', '.eml']
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if not ext.lower() in valid_extensions:
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# TODO: one more check in case it is a file with no extension; we
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# should always allow that?
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if not (ext.lower() == '' or ext.lower() == '.'):
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raise ValidationError(
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'Unsupported file extension: %s.' % ext.lower())
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