|
|
# -*- coding: utf-8 -*-
|
|
|
|
|
|
# Copyright (C) 2012-2017 RhodeCode GmbH
|
|
|
#
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
|
# it under the terms of the GNU Affero General Public License, version 3
|
|
|
# (only), as published by the Free Software Foundation.
|
|
|
#
|
|
|
# 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 Affero General Public License
|
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
#
|
|
|
# This program is dual-licensed. If you wish to learn more about the
|
|
|
# RhodeCode Enterprise Edition, including its added features, Support services,
|
|
|
# and proprietary license terms, please see https://rhodecode.com/licenses/
|
|
|
|
|
|
"""
|
|
|
Utility to call a WSGI app wrapped in a WSGIAppCaller object.
|
|
|
"""
|
|
|
|
|
|
import logging
|
|
|
|
|
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
|
|
|
def _get_clean_environ(environ):
|
|
|
"""Return a copy of the WSGI environment without wsgi.* keys.
|
|
|
|
|
|
It also omits any non-string values.
|
|
|
|
|
|
:param environ: WSGI environment to clean
|
|
|
:type environ: dict
|
|
|
|
|
|
:returns: WSGI environment to pass to WSGIAppCaller.handle.
|
|
|
:rtype: dict
|
|
|
"""
|
|
|
clean_environ = dict(
|
|
|
(k, v) for k, v in environ.iteritems()
|
|
|
if type(v) == str and type(k) == str and not k.startswith('wsgi.')
|
|
|
)
|
|
|
|
|
|
return clean_environ
|
|
|
|
|
|
|
|
|
# pylint: disable=too-few-public-methods
|
|
|
class RemoteAppCaller(object):
|
|
|
"""Create and calls a remote WSGI app using the given factory.
|
|
|
|
|
|
It first cleans the environment, so as to reduce the data transferred.
|
|
|
"""
|
|
|
|
|
|
def __init__(self, remote_wsgi, *args, **kwargs):
|
|
|
"""
|
|
|
:param remote_wsgi: The remote wsgi object that creates a
|
|
|
WSGIAppCaller. This object
|
|
|
has to have a handle method, with the signature:
|
|
|
handle(environ, start_response, *args, **kwargs)
|
|
|
:param args: args to be passed to the app creation
|
|
|
:param kwargs: kwargs to be passed to the app creation
|
|
|
"""
|
|
|
self._remote_wsgi = remote_wsgi
|
|
|
self._args = args
|
|
|
self._kwargs = kwargs
|
|
|
|
|
|
def __call__(self, environ, start_response):
|
|
|
"""
|
|
|
:param environ: WSGI environment with which the app will be run
|
|
|
:type environ: dict
|
|
|
:param start_response: callable of WSGI protocol
|
|
|
:type start_response: callable
|
|
|
|
|
|
:returns: an iterable with the data returned by the app
|
|
|
:rtype: iterable<str>
|
|
|
"""
|
|
|
log.debug("Forwarding WSGI request via proxy %s", self._remote_wsgi)
|
|
|
input_data = environ['wsgi.input'].read()
|
|
|
clean_environ = _get_clean_environ(environ)
|
|
|
|
|
|
data, status, headers = self._remote_wsgi.handle(
|
|
|
clean_environ, input_data, *self._args, **self._kwargs)
|
|
|
|
|
|
log.debug("Got result from proxy, returning to WSGI container")
|
|
|
start_response(status, headers)
|
|
|
|
|
|
return data
|
|
|
|
