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[IMP] attachment_preview: improve performance for large files with filenames (#100)

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This commit is contained in:
Thomas Rehn 2016-11-08 18:10:19 +01:00 committed by Pedro M. Baeza
parent b71c6e8327
commit 0d001986dd
2 changed files with 58 additions and 31 deletions
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2
attachment_preview/__openerp__.py
View File

@ -20,7 +20,7 @@
##############################################################################
{
"name": "Preview attachments",
"version": "8.0.1.1.0",
"version": "8.0.1.2.0",
"author": "Therp BV,Odoo Community Association (OCA)",
"license": "AGPL-3",
"complexity": "normal",

87
attachment_preview/model/ir_attachment.py
View File

@ -18,12 +18,16 @@
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
import collections
import os.path
import mimetypes
import base64
import collections
import logging
import mimetypes
import os.path
from openerp.osv.orm import Model
_logger = logging.getLogger(__name__)
class IrAttachment(Model):
_inherit = 'ir.attachment'
@ -32,35 +36,58 @@ class IrAttachment(Model):
self, cr, uid, model, ids, binary_field, filename_field=None,
context=None):
result = {}
for this in self.pool[model].browse(
cr, uid,
ids if isinstance(ids, collections.Iterable) else [ids],
context=context):
if not this.id:
result[this.id] = False
continue
extension = ''
if filename_field and this[filename_field]:
filename, extension = os.path.splitext(this[filename_field])
if not this[binary_field]:
result[this.id] = False
continue
if not extension:
try:
import magic
ms = magic.open(
hasattr(magic, 'MAGIC_MIME_TYPE') and
magic.MAGIC_MIME_TYPE or magic.MAGIC_MIME)
ms.load()
context_bin_size = dict(context or {})
context_bin_size['bin_size'] = True
ids_to_browse = ids if isinstance(ids, collections.Iterable) \
else [ids]
# First pass: load fields in bin_size mode to avoid loading big files
# unnecessarily.
if filename_field:
for this in self.pool[model].browse(cr, uid, ids_to_browse,
context=context_bin_size):
if not this.id:
result[this.id] = False
continue
extension = ''
if this[filename_field]:
filename, extension = os.path.splitext(
this[filename_field])
if this[binary_field] and extension:
result[this.id] = extension
_logger.debug('Got extension %s from filename %s',
extension, this[filename_field])
# Second pass for all attachments which have to be loaded fully
# to get the extension from the content
ids_to_browse = [_id for _id in ids_to_browse if _id not in result]
for this in self.pool[model].browse(cr, uid, ids_to_browse,
context=context):
try:
import magic
ms = magic.open(
hasattr(magic, 'MAGIC_MIME_TYPE') and
magic.MAGIC_MIME_TYPE or magic.MAGIC_MIME)
ms.load()
if model == self._name and binary_field == 'datas'\
and this.store_fname:
mimetype = ms.file(
this._full_path(this.store_fname))
_logger.debug('Magic determined mimetype %s from file %s',
mimetype, this.store_fname)
else:
mimetype = ms.buffer(
base64.b64decode(this[binary_field]))
except ImportError:
(mimetype, encoding) = mimetypes.guess_type(
'data:;base64,' + this[binary_field], strict=False)
extension = mimetypes.guess_extension(
mimetype.split(';')[0], strict=False)
result[this.id] = (extension or '').lstrip('.').lower()
_logger.debug('Magic determined mimetype %s from buffer',
mimetype)
except ImportError:
(mimetype, encoding) = mimetypes.guess_type(
'data:;base64,' + this[binary_field], strict=False)
_logger.debug('Mimetypes guessed type %s from buffer',
mimetype)
extension = mimetypes.guess_extension(
mimetype.split(';')[0], strict=False)
result[this.id] = extension
for _id in result:
result[_id] = (result[_id] or '').lstrip('.').lower()
return result if isinstance(ids, collections.Iterable) else result[ids]
def get_attachment_extension(self, cr, uid, ids, context=None):