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# SPDX-License-Identifier: GPL-3.0-or-later
# Miscellaneous policies.
#
# 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 of this
# code in a proprietary program, I am not going to enforce this in
# court.
"""
.....
"""
import enum
import traceback as tb
import dataclasses as dc
import typing as t
from abc import ABC, abstractmethod
from .. import state
from .. import http_messages
from . import base
from .rule import AllowPolicy, BlockPolicy
class FallbackAllowPolicy(AllowPolicy):
priority = base.PolicyPriority._ONE
def make_info_page(self, http_info: http_messages.FullHTTPInfo) \
-> t.Optional[str]:
template = base.get_info_template('js_fallback_allowed_info.html.jinja')
return template.render(url=http_info.request_info.url.orig_url)
class FallbackBlockPolicy(BlockPolicy):
priority = base.PolicyPriority._ONE
def make_info_page(self, http_info: http_messages.FullHTTPInfo) \
-> t.Optional[str]:
template = base.get_info_template('js_fallback_blocked_info.html.jinja')
return template.render(url=http_info.request_info.url.orig_url)
@dc.dataclass(frozen=True)
class ErrorBlockPolicy(BlockPolicy):
error: Exception
@property
def traceback(self) -> str:
lines = tb.format_exception(None, self.error, self.error.__traceback__)
return ''.join(lines)
def make_info_page(self, http_info: http_messages.FullHTTPInfo) \
-> t.Optional[str]:
template = base.get_info_template('js_error_blocked_info.html.jinja')
return template.render(
url = http_info.request_info.url.orig_url,
settings = self.haketilo_settings,
traceback = self.traceback
)
class MitmItPagePolicy(base.Policy):
"""
A special policy class for handling of the magical mitm.it domain. It causes
request and response not to be modified in any way and also (unlike
FallbackAllowPolicy) prevents them from being streamed.
"""
_process_request = base.MsgProcessOpt.MUST
_process_response = base.MsgProcessOpt.MUST
anticache = False
priority = base.PolicyPriority._THREE
def consume_request(self, request_info: http_messages.RequestInfo) -> None:
return None
def consume_response(self, http_info: http_messages.FullHTTPInfo) -> None:
return None
@dc.dataclass(frozen=True, unsafe_hash=True)
class MitmItPagePolicyFactory(base.PolicyFactory):
builtin: bool = True
def make_policy(self, haketilo_state: state.HaketiloState) \
-> MitmItPagePolicy:
return MitmItPagePolicy(haketilo_state.get_settings())
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