mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-30 03:14:22 +00:00
124 lines
3.7 KiB
Python
124 lines
3.7 KiB
Python
import contextlib
|
|
import blinker
|
|
import pprint
|
|
|
|
from mitmproxy import exceptions
|
|
from mitmproxy.utils import typecheck
|
|
|
|
"""
|
|
The base implementation for Options.
|
|
"""
|
|
|
|
|
|
class OptManager:
|
|
"""
|
|
.changed is a blinker Signal that triggers whenever options are
|
|
updated. If any handler in the chain raises an exceptions.OptionsError
|
|
exception, all changes are rolled back, the exception is suppressed,
|
|
and the .errored signal is notified.
|
|
"""
|
|
_initialized = False
|
|
attributes = []
|
|
|
|
def __new__(cls, *args, **kwargs):
|
|
# Initialize instance._opts before __init__ is called.
|
|
# This allows us to call super().__init__() last, which then sets
|
|
# ._initialized = True as the final operation.
|
|
instance = super().__new__(cls)
|
|
instance.__dict__["_opts"] = {}
|
|
return instance
|
|
|
|
def __init__(self):
|
|
self.__dict__["changed"] = blinker.Signal()
|
|
self.__dict__["errored"] = blinker.Signal()
|
|
self.__dict__["_initialized"] = True
|
|
|
|
@contextlib.contextmanager
|
|
def rollback(self, updated):
|
|
old = self._opts.copy()
|
|
try:
|
|
yield
|
|
except exceptions.OptionsError as e:
|
|
# Notify error handlers
|
|
self.errored.send(self, exc=e)
|
|
# Rollback
|
|
self.__dict__["_opts"] = old
|
|
self.changed.send(self, updated=updated)
|
|
|
|
def __eq__(self, other):
|
|
return self._opts == other._opts
|
|
|
|
def __copy__(self):
|
|
return self.__class__(**self._opts)
|
|
|
|
def __getattr__(self, attr):
|
|
if attr in self._opts:
|
|
return self._opts[attr]
|
|
else:
|
|
raise AttributeError("No such option: %s" % attr)
|
|
|
|
def __setattr__(self, attr, value):
|
|
if not self._initialized:
|
|
self._typecheck(attr, value)
|
|
self._opts[attr] = value
|
|
return
|
|
self.update(**{attr: value})
|
|
|
|
def _typecheck(self, attr, value):
|
|
expected_type = typecheck.get_arg_type_from_constructor_annotation(
|
|
type(self), attr
|
|
)
|
|
if expected_type is None:
|
|
return # no type info :(
|
|
typecheck.check_type(attr, value, expected_type)
|
|
|
|
def keys(self):
|
|
return set(self._opts.keys())
|
|
|
|
def get(self, k, d=None):
|
|
return self._opts.get(k, d)
|
|
|
|
def update(self, **kwargs):
|
|
updated = set(kwargs.keys())
|
|
for k, v in kwargs.items():
|
|
if k not in self._opts:
|
|
raise KeyError("No such option: %s" % k)
|
|
self._typecheck(k, v)
|
|
with self.rollback(updated):
|
|
self._opts.update(kwargs)
|
|
self.changed.send(self, updated=updated)
|
|
|
|
def setter(self, attr):
|
|
"""
|
|
Generate a setter for a given attribute. This returns a callable
|
|
taking a single argument.
|
|
"""
|
|
if attr not in self._opts:
|
|
raise KeyError("No such option: %s" % attr)
|
|
|
|
def setter(x):
|
|
setattr(self, attr, x)
|
|
return setter
|
|
|
|
def toggler(self, attr):
|
|
"""
|
|
Generate a toggler for a boolean attribute. This returns a callable
|
|
that takes no arguments.
|
|
"""
|
|
if attr not in self._opts:
|
|
raise KeyError("No such option: %s" % attr)
|
|
|
|
def toggle():
|
|
setattr(self, attr, not getattr(self, attr))
|
|
return toggle
|
|
|
|
def __repr__(self):
|
|
options = pprint.pformat(self._opts, indent=4).strip(" {}")
|
|
if "\n" in options:
|
|
options = "\n " + options + "\n"
|
|
return "{mod}.{cls}({{{options}}})".format(
|
|
mod=type(self).__module__,
|
|
cls=type(self).__name__,
|
|
options=options
|
|
)
|