61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
# fargo - document box
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# Copyright (C) 2016-2019 Entr'ouvert
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import hashlib
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from django.apps import apps
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from django.utils.timezone import utc
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try:
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import magic
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except ImportError:
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magic = None
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def to_isodate(dt):
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return dt.astimezone(utc).isoformat('T').split('.')[0] + 'Z'
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def sha256_of_file(f):
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'''Compute SHA-256 hash of Django File object'''
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hasher = hashlib.sha256()
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for chunk in f.chunks():
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hasher.update(chunk)
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return hasher.hexdigest()
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def get_mime_type(fd):
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if magic is None:
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return None
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mime_type = magic.from_buffer(next(fd.chunks(1024 * 20)), mime=True)
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if mime_type:
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mime_type = mime_type.split(';')[0]
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if mime_type.startswith('cannot open'):
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mime_type = None
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return mime_type
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def cleanup_model(model, n=None):
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manager = getattr(model, 'objects', None)
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if hasattr(manager, 'cleanup'):
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manager.cleanup(n=n)
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def cleanup(n=None):
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for model in apps.get_models():
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cleanup_model(model, n=n)
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