57 lines
2.0 KiB
Python
57 lines
2.0 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 base64
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import uuid
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import six
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from django.core.files.base import ContentFile
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from rest_framework import fields, serializers
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from . import api_errors
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class SlugCreatedRelatedField(serializers.SlugRelatedField):
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def to_internal_value(self, data):
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return self.get_queryset().get_or_create(**{self.slug_field: data})[0]
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class Base64FileField(fields.Field):
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def __init__(self, *args, **kwargs):
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self.max_size = kwargs.pop('max_size', 0)
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super(Base64FileField, self).__init__(*args, **kwargs)
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def get_max_size(self):
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if hasattr(self.max_size, '__call__'):
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return self.max_size()
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return self.max_size
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def to_internal_value(self, data):
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if isinstance(data, six.string_types):
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# base64 encoded image - decode
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name = uuid.uuid4()
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try:
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content = base64.b64decode(data)
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except ValueError:
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raise api_errors.APIError('NOT_BASE64')
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max_size = self.get_max_size()
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if max_size and len(content) > self.get_max_size():
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raise api_errors.APIError('TOO_BIG', limit=str(self.get_max_size()))
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data = ContentFile(content, name=name)
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else:
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raise api_errors.APIError('NOT_STRING')
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return data
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