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# SPDX-License-Identifier: GPL-3.0-or-later
# Haketilo addon for Mitmproxy.
#
# This file is part of Hydrilla&Haketilo.
#
# Copyright (C) 2022 Wojtek Kosior
#
# 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/>.
#
#
# I, Wojtek Kosior, thereby promise not to sue for violation of this
# file's license. Although I request that you do not make use this code
# in a proprietary program, I am not going to enforce this in court.
"""
This module contains the definition of a mitmproxy addon that gets instantiated
from addon script.
"""
# Enable using with Python 3.7.
from __future__ import annotations
import os.path
import typing as t
import dataclasses as dc
from threading import Lock
from pathlib import Path
from contextlib import contextmanager
from mitmproxy import http, addonmanager, ctx
from mitmproxy.script import concurrent
from .flow_handlers import make_flow_handler, FlowHandler
from .state import HaketiloState
from ..translations import smart_gettext as _
FlowHandlers = dict[int, FlowHandler]
StateUpdater = t.Callable[[HaketiloState], None]
HTTPHandlerFun = t.Callable[
['HaketiloAddon', http.HTTPFlow],
t.Optional[StateUpdater]
]
def http_event_handler(handler_fun: HTTPHandlerFun):
"""....decorator"""
def wrapped_handler(self: 'HaketiloAddon', flow: http.HTTPFlow):
"""...."""
with self.configured_lock:
assert self.configured
assert self.state is not None
state_updater = handler_fun(self, flow)
if state_updater is not None:
state_updater(self.state)
return wrapped_handler
@dc.dataclass
class HaketiloAddon:
"""
.......
"""
configured: bool = False
configured_lock: Lock = dc.field(default_factory=Lock)
state: t.Optional[HaketiloState] = None
flow_handlers: FlowHandlers = dc.field(default_factory=dict)
handlers_lock: Lock = dc.field(default_factory=Lock)
def load(self, loader: addonmanager.Loader) -> None:
"""...."""
loader.add_option(
name = 'haketilo_dir',
typespec = str,
default = '~/.haketilo/',
help = "Point to a Haketilo data directory to use",
)
def configure(self, updated: set[str]) -> None:
"""...."""
if 'haketilo_dir' not in updated:
return
with self.configured_lock:
if self.configured:
ctx.log.warn(_('haketilo_dir_already_configured'))
return
haketilo_dir = Path(ctx.options.haketilo_dir)
self.state = HaketiloState(haketilo_dir / 'store')
def assign_handler(self, flow: http.HTTPFlow, flow_handler: FlowHandler) \
-> None:
"""...."""
with self.handlers_lock:
self.flow_handlers[id(flow)] = flow_handler
def lookup_handler(self, flow: http.HTTPFlow) -> FlowHandler:
"""...."""
with self.handlers_lock:
return self.flow_handlers[id(flow)]
def forget_handler(self, flow: http.HTTPFlow) -> None:
"""...."""
with self.handlers_lock:
self.flow_handlers.pop(id(flow), None)
@concurrent
@http_event_handler
def requestheaders(self, flow: http.HTTPFlow) -> t.Optional[StateUpdater]:
"""
.....
"""
assert self.state is not None
policy = self.state.select_policy(flow.request.url)
flow_handler = make_flow_handler(flow, policy)
self.assign_handler(flow, flow_handler)
return flow_handler.on_requestheaders()
@concurrent
@http_event_handler
def request(self, flow: http.HTTPFlow) -> t.Optional[StateUpdater]:
"""
....
"""
return self.lookup_handler(flow).on_request()
@concurrent
@http_event_handler
def responseheaders(self, flow: http.HTTPFlow) -> t.Optional[StateUpdater]:
"""
......
"""
return self.lookup_handler(flow).on_responseheaders()
@concurrent
@http_event_handler
def response(self, flow: http.HTTPFlow) -> t.Optional[StateUpdater]:
"""
......
"""
updater = self.lookup_handler(flow).on_response()
self.forget_handler(flow)
return updater
@http_event_handler
def error(self, flow: http.HTTPFlow) -> None:
"""...."""
self.forget_handler(flow)
addons = [
HaketiloAddon()
]
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