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# coding: utf-8
# Copyright (C) 2014 initOS GmbH & Co. KG (<http://www.initos.com>).
# @author: Joel Grand-Guillaume @ Camptocamp SA
# @ 2015 Valentin CHEMIERE @ Akretion
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
from openerp import models, fields, api, _
from openerp.exceptions import Warning as UserError
import hashlib
from base64 import b64decode
class IrAttachmentMetadata(models.Model):
_name = 'ir.attachment.metadata'
_inherits = {'ir.attachment': 'attachment_id'}
internal_hash = fields.Char(store=True, compute='_compute_hash')
external_hash = fields.Char()
attachment_id = fields.Many2one('ir.attachment', required=True,
ondelete='cascade')
@api.depends('datas', 'external_hash')
def _compute_hash(self):
if self.datas:
self.internal_hash = hashlib.md5(b64decode(self.datas)).hexdigest()
if self.external_hash and self.internal_hash != self.external_hash:
raise UserError(_('File corrupted'),
_("Something was wrong with the retreived file, "
"please relaunch the task."))