airflow init_wsgi_middlewares 源码
airflow init_wsgi_middlewares 代码
文件路径：/airflow/www/extensions/init_wsgi_middlewares.py
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
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from __future__ import annotations
from typing import TYPE_CHECKING, Iterable
from urllib.parse import urlparse
from flask import Flask
from werkzeug.middleware.dispatcher import DispatcherMiddleware
from werkzeug.middleware.proxy_fix import ProxyFix
from airflow.configuration import conf
if TYPE_CHECKING:
from _typeshed.wsgi import StartResponse, WSGIEnvironment
def _root_app(env: WSGIEnvironment, resp: StartResponse) -> Iterable[bytes]:
resp('404 Not Found', [('Content-Type', 'text/plain')])
return [b'Apache Airflow is not at this location']
def init_wsgi_middleware(flask_app: Flask) -> None:
"""Handle X-Forwarded-* headers and base_url support"""
# Apply DispatcherMiddleware
base_url = urlparse(conf.get('webserver', 'base_url'))[2]
if not base_url or base_url == '/':
base_url = ""
if base_url:
wsgi_app = DispatcherMiddleware(_root_app, mounts={base_url: flask_app.wsgi_app})
flask_app.wsgi_app = wsgi_app # type: ignore[assignment]
# Apply ProxyFix middleware
if conf.getboolean('webserver', 'ENABLE_PROXY_FIX'):
flask_app.wsgi_app = ProxyFix( # type: ignore
flask_app.wsgi_app,
x_for=conf.getint("webserver", "PROXY_FIX_X_FOR", fallback=1),
x_proto=conf.getint("webserver", "PROXY_FIX_X_PROTO", fallback=1),
x_host=conf.getint("webserver", "PROXY_FIX_X_HOST", fallback=1),
x_port=conf.getint("webserver", "PROXY_FIX_X_PORT", fallback=1),
x_prefix=conf.getint("webserver", "PROXY_FIX_X_PREFIX", fallback=1),
)
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