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supysonic/supysonic/utils.py

37 lines
944 B
Python

# coding: utf-8
#
# This file is part of Supysonic.
# Supysonic is a Python implementation of the Subsonic server API.
#
# Copyright (C) 2019-2020 Alban 'spl0k' Féron
#
# Distributed under terms of the GNU AGPLv3 license.
from base64 import b64encode, b64decode
from os import urandom
from pony.orm import db_session, commit, ObjectNotFound
from supysonic.db import Meta
__key_cache = {}
def get_secret_key(keyname):
if keyname in __key_cache:
return __key_cache[keyname]
with db_session():
# Commit both at enter and exit. The metadb/db split (from supysonic.db)
# confuses Pony which can either error or hang when this method is called
commit()
try:
key = b64decode(Meta[keyname].value)
except ObjectNotFound:
key = urandom(128)
Meta(key=keyname, value=b64encode(key).decode())
commit()
__key_cache[keyname] = key
return key