import errno
import pickle
from flask import current_app, render_template
from flask.views import MethodView
from werkzeug.exceptions import Forbidden
from ..constants import ID, TIMESTAMP_UPLOAD
from ..utils.date_funcs import delete_if_lifetime_over
from ..utils.permissions import LIST, may
def file_infos(names=None):
"""
iterates over storage files metadata.
note: we put the storage name into the metadata as ID
:param names: None means "all items"
otherwise give a list of storage item names
"""
storage = current_app.storage
if names is None:
names = list(storage)
for name in names:
try:
with storage.open(name) as item:
meta = dict(item.meta)
if not meta:
# we got empty metadata, this happens for 0-byte .meta files.
# ignore it for now.
continue
if delete_if_lifetime_over(item, name):
continue
meta[ID] = name
yield meta
except OSError as e:
if e.errno != errno.ENOENT:
raise
except pickle.UnpicklingError:
# corrupted meta file, just ignore it for now
pass
class FileListView(MethodView):
def get(self):
if not may(LIST):
raise Forbidden()
files = sorted(file_infos(), key=lambda f: f[TIMESTAMP_UPLOAD], reverse=True)
return render_template('filelist.html', files=files)
