mirror of https://github.com/jumpserver/jumpserver
153 lines
3.8 KiB
Python
153 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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#
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import json
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from django.db import models
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from django.utils.translation import ugettext_lazy as _
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from ..utils import get_signer
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__all__ = [
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'JsonMixin', 'JsonDictMixin', 'JsonListMixin', 'JsonTypeMixin',
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'JsonCharField', 'JsonTextField', 'JsonListCharField', 'JsonListTextField',
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'JsonDictCharField', 'JsonDictTextField', 'EncryptCharField',
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'EncryptTextField', 'EncryptMixin', 'EncryptJsonDictTextField',
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]
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signer = get_signer()
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class JsonMixin:
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tp = None
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@staticmethod
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def json_decode(data):
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try:
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return json.loads(data)
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except (TypeError, json.JSONDecodeError):
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return None
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@staticmethod
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def json_encode(data):
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return json.dumps(data)
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def from_db_value(self, value, expression, connection, context):
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if value is None:
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return value
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return self.json_decode(value)
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def to_python(self, value):
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if value is None:
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return value
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if not isinstance(value, str) or not value.startswith('"'):
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return value
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else:
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return self.json_decode(value)
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def get_prep_value(self, value):
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if value is None:
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return value
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return self.json_encode(value)
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class JsonTypeMixin(JsonMixin):
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tp = dict
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def from_db_value(self, value, expression, connection, context):
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value = super().from_db_value(value, expression, connection, context)
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if not isinstance(value, self.tp):
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value = self.tp()
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return value
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def to_python(self, value):
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data = super().to_python(value)
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if not isinstance(data, self.tp):
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data = self.tp()
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return data
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def get_prep_value(self, value):
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if not isinstance(value, self.tp):
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value = self.tp()
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return self.json_encode(value)
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class JsonDictMixin(JsonTypeMixin):
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tp = dict
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class JsonDictCharField(JsonDictMixin, models.CharField):
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description = _("Marshal dict data to char field")
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class JsonDictTextField(JsonDictMixin, models.TextField):
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description = _("Marshal dict data to text field")
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class JsonListMixin(JsonTypeMixin):
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tp = list
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class JsonStrListMixin(JsonListMixin):
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pass
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class JsonListCharField(JsonListMixin, models.CharField):
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description = _("Marshal list data to char field")
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class JsonListTextField(JsonListMixin, models.TextField):
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description = _("Marshal list data to text field")
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class JsonCharField(JsonMixin, models.CharField):
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description = _("Marshal data to char field")
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class JsonTextField(JsonMixin, models.TextField):
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description = _("Marshal data to text field")
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class EncryptMixin:
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def from_db_value(self, value, expression, connection, context):
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if value is not None:
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return signer.unsign(value)
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return None
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def get_prep_value(self, value):
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if value is None:
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return value
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return signer.sign(value)
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class EncryptTextField(EncryptMixin, models.TextField):
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description = _("Encrypt field using Secret Key")
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class EncryptCharField(EncryptMixin, models.CharField):
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@staticmethod
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def change_max_length(kwargs):
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kwargs.setdefault('max_length', 1024)
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max_length = kwargs.get('max_length')
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if max_length < 129:
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max_length = 128
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max_length = max_length * 2
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kwargs['max_length'] = max_length
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def __init__(self, *args, **kwargs):
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self.change_max_length(kwargs)
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super().__init__(*args, **kwargs)
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def deconstruct(self):
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name, path, args, kwargs = super().deconstruct()
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max_length = kwargs.pop('max_length')
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if max_length > 255:
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max_length = max_length // 2
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kwargs['max_length'] = max_length
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return name, path, args, kwargs
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class EncryptJsonDictTextField(EncryptMixin, JsonDictTextField):
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pass
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