def get_assets(self, projection=None):
"""
Return a list of assets given (as JSON) in the form argument `assets`.
"""
uids = self.get_body_arguments('uids')
if not uids:
raise APIError(
'invalid_request',
hint=f'No uids provided.'
)
# Fetch the asset
return Asset.many(
And(
Q.account == self.account,
In(Q.uid, uids),
Not(Q.expires <= time.time())
),
projection=(projection or self.DEFAULT_PROJECTION)
)
def purge():
"""Purge assets that have expired"""
# Get expired assets
now = time.time()
max_delete_period = 48 * 60 * 60
assets = Asset.many(And(
Q.expires <= now,
Q.expires > now - max_delete_period,
),
projection={
'expires': True,
'ext': True,
'meta.length': True,
'name': True,
'secure': True,
'uid': True,
'variations': {
'$sub.': Variation
},
'account': {
'$ref': Account,
'public_backend_settings': True,
'secure_backend_settings': True
}
})
# Delete the assets
for asset in assets:
variation_count = 0
length = asset.meta['length']
# Remove all stored files for the asset
if asset.secure:
backend = asset.account.secure_backend
else:
backend = asset.account.public_backend
if backend:
if asset.variations:
# Count the variations for the asset
variation_count = len(asset.variations)
for variation_name, variation in asset.variations.items():
# Tally up the assets total footprint
length += variation.meta['length']
# Remove variation files
backend.delete(
variation.get_store_key(asset, variation_name))
# Remove the asset file
backend.delete(asset.store_key)
# Delete the asset from the database
asset.delete()
# Update the asset stats
Stats.inc(asset.account, today_tz(), {
'assets': -1,
'variations': -variation_count,
'length': -length
})