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98 lines
3.5 KiB
98 lines
3.5 KiB
###################################################################################
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#
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# Copyright (c) 2017-2019 MuK IT GmbH.
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#
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# This file is part of MuK Large Objects Field
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# (see https://mukit.at).
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# 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 Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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###################################################################################
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import base64
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import hashlib
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import logging
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import tempfile
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from odoo import fields
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from odoo.tools import human_size
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_logger = logging.getLogger(__name__)
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class LargeObject(fields.Field):
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type = "lobject"
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column_type = ("oid", "oid")
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_slots = {
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"prefetch": False,
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"depends_context": ("bin_size", "human_size", "oid", "bytes", "stream", "checksum", "base64"),
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}
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def convert_to_column(self, value, record, values=None, validate=True):
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oid = record.with_context({"oid": True})[self.name]
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if oid:
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record.env.cr._cnx.lobject(oid, "rb").unlink()
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if not value:
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return None
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lobject = record.env.cr._cnx.lobject(0, "wb")
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if isinstance(value, bytes):
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lobject.write(value)
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elif isinstance(value, str):
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lobject.write(base64.b64decode(value))
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else:
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while True:
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chunk = value.read(4096)
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if not chunk:
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break
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lobject.write(chunk)
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return lobject.oid
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def convert_to_record(self, value, record):
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if value and isinstance(value, int):
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lobject = record.env.cr._cnx.lobject(value, "rb")
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if record._context.get("human_size"):
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return human_size(lobject.seek(0, 2))
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elif record._context.get("bin_size"):
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return lobject.seek(0, 2)
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elif record._context.get("oid"):
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return lobject.oid
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elif record._context.get("bytes"):
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return lobject.read()
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elif record._context.get("stream"):
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file = tempfile.TemporaryFile()
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while True:
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chunk = lobject.read(4096)
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if not chunk:
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file.seek(0)
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return file
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file.write(chunk)
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elif record._context.get("checksum"):
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checksum = hashlib.sha1()
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while True:
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chunk = lobject.read(4096)
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if not chunk:
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return checksum.hexdigest()
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checksum.update(chunk)
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else:
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return base64.b64encode(lobject.read())
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return None if value is False else value
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def convert_to_export(self, value, record):
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if value:
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lobject = record.env.cr._cnx.lobject(value, "rb")
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if record._context.get("export_raw_data"):
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return lobject.read()
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return base64.b64encode(lobject.read())
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return ""
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