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Mini Shell
Mini Shell
"""
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Copyright © 2019 Cloud Linux Software Inc.
This software is also available under ImunifyAV commercial license,
see <https://www.imunify360.com/legal/eula>
"""
import functools
import logging
import pickle
from asyncio import iscoroutinefunction
from typing import Union, Callable
logger = logging.getLogger(__name__)
def _dump(path, obj):
# separate function to mock in tests
with open(path, "wb") as w:
pickle.dump(obj, w)
def serialize_attr(*, path: str, attr: str):
"""
Make decorator to serialize an object or object's attribute
:param path: path to file to serialize into
:param attr: attribute name to serialize
"""
def decorator(f):
@functools.wraps(f)
def wrapper(self, *args, **kwargs):
result = f(self, *args, **kwargs)
obj = getattr(self, attr)
logger.debug("Write %r to %r", obj, path)
_dump(path, obj)
return result
@functools.wraps(f)
async def async_wrapper(self, *args, **kwargs):
result = await f(self, *args, **kwargs)
obj = getattr(self, attr)
logger.debug("Write %r to %r", obj, path)
_dump(path, obj)
return result
if iscoroutinefunction(f):
return async_wrapper
return wrapper
return decorator
def unserialize(*, path: str, fallback: Union[Callable, object] = None):
"""
Restore an object from file
:param path: path to read from
:param fallback: return or call it if unserialization fails
:return:
"""
try:
with open(path, "rb") as r:
obj = pickle.load(r)
logger.debug("Read %r from %r", obj, path)
except (
FileNotFoundError,
EOFError,
IndexError,
pickle.UnpicklingError,
) as e:
obj = fallback() if callable(fallback) else fallback
logger.debug("Unserialize failed with %r. Returning an %r", e, obj)
return obj
Zerion Mini Shell 1.0