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# SPDX-License-Identifier: GPL-3.0-or-later
# Proxy web UI root.
#
# 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.
"""
.....
"""
# Enable using with Python 3.7.
from __future__ import annotations
import typing as t
from threading import Lock
from urllib.parse import urlparse
import jinja2
import flask
import werkzeug
from ...translations import translation as make_translation
from ... import versions
from .. import state as st
from .. import http_messages
from . import repos
from . import packages
from . import _app
def authenticate_by_referrer() -> t.Optional[werkzeug.Response]:
if flask.request.method == 'GET':
return None
parsed_url = urlparse(flask.request.referrer)
if parsed_url.netloc == 'hkt.mitm.it':
return None
flask.abort(403)
class WebUIAppImpl(_app.WebUIApp):
def __init__(self):
super().__init__(__name__)
self.jinja_options = {
**self.jinja_options,
'loader': jinja2.PackageLoader(__package__),
'autoescape': jinja2.select_autoescape(['html.jinja']),
'extensions': [
*self.jinja_options.get('extensions', []),
'jinja2.ext.i18n'
]
}
self.jinja_env.globals['versions'] = versions
self.before_request(authenticate_by_referrer)
for blueprint in [repos.bp, packages.bp]:
self.register_blueprint(blueprint)
# Flask app is not thread-safe and has to be accompanied by an ugly lock. This
# can cause slow requests to block other requests, so we might need a better
# workaround at some later point.
app = WebUIAppImpl()
app_lock = Lock()
@app.route('/')
def respond() -> str:
return flask.render_template('root.html.jinja')
def process_request(
request_info: http_messages.RequestInfo,
state: st.HaketiloState
) -> http_messages.ProducedResponse:
path = '/'.join(('', *request_info.url.path_segments))
if (request_info.url.has_trailing_slash):
path += '/'
with app_lock:
app._haketilo_state = state
app.jinja_env.install_gettext_translations(make_translation())
flask_response = app.test_client().open(
path = path,
base_url = 'https://hkt.mitm.it',
method = request_info.method,
query_string = request_info.url.query,
headers = [*request_info.headers.items()],
data = request_info.body
)
headers_bytes = [
(key.encode(), val.encode())
for key, val
in flask_response.headers
]
return http_messages.ProducedResponse(
status_code = flask_response.status_code,
headers = headers_bytes,
body = flask_response.data
)
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