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# GNU Mediagoblin -- federated, autonomous media hosting
# Copyright (C) 2011 Free Software Foundation, Inc
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from werkzeug.utils import secure_filename
class Error(Exception): pass
class InvalidFilepath(Error): pass
def clean_listy_filepath(listy_filepath):
"""
Take a listy filepath (like ['dir1', 'dir2', 'filename.jpg']) and
clean out any nastiness from it.
For example:
>>> clean_listy_filepath([u'/dir1/', u'foo/../nasty', u'linooks.jpg'])
[u'dir1', u'foo_.._nasty', u'linooks.jpg']
Args:
- listy_filepath: a list of filepath components, mediagoblin
storage API style.
Returns:
A cleaned list of unicode objects.
"""
cleaned_filepath = [
unicode(secure_filename(filepath))
for filepath in listy_filepath]
if u'' in cleaned_filepath:
raise InvalidFilepath(
"A filename component could not be resolved into a usable name.")
return cleaned_filepath
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