keystone/keystone/tests/test_wsgi.py

# Copyright 2012 OpenStack Foundation
#
# Licensed 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
# under the License.

import gettext
import socket
import uuid

import mock
import oslo_i18n
from oslo_serialization import jsonutils
import six
from testtools import matchers
import webob

from keystone.common import environment
from keystone.common import wsgi
from keystone import exception
from keystone import tests


class FakeApp(wsgi.Application):
    def index(self, context):
        return {'a': 'b'}


class FakeAttributeCheckerApp(wsgi.Application):
    def index(self, context):
        return context['query_string']

    def assert_attribute(self, body, attr):
        """Asserts that the given request has a certain attribute."""
        ref = jsonutils.loads(body)
        self._require_attribute(ref, attr)

    def assert_attributes(self, body, attr):
        """Asserts that the given request has a certain set attributes."""
        ref = jsonutils.loads(body)
        self._require_attributes(ref, attr)


class BaseWSGITest(tests.TestCase):
    def setUp(self):
        self.app = FakeApp()
        super(BaseWSGITest, self).setUp()

    def _make_request(self, url='/'):
        req = webob.Request.blank(url)
        args = {'action': 'index', 'controller': None}
        req.environ['wsgiorg.routing_args'] = [None, args]
        return req


class ApplicationTest(BaseWSGITest):
    def test_response_content_type(self):
        req = self._make_request()
        resp = req.get_response(self.app)
        self.assertEqual(resp.content_type, 'application/json')

    def test_query_string_available(self):
        class FakeApp(wsgi.Application):
            def index(self, context):
                return context['query_string']
        req = self._make_request(url='/?1=2')
        resp = req.get_response(FakeApp())
        self.assertEqual(jsonutils.loads(resp.body), {'1': '2'})

    def test_headers_available(self):
        class FakeApp(wsgi.Application):
            def index(self, context):
                return context['headers']

        app = FakeApp()
        req = self._make_request(url='/?1=2')
        req.headers['X-Foo'] = "bar"
        resp = req.get_response(app)
        self.assertIn('X-Foo', eval(resp.body))

    def test_render_response(self):
        data = {'attribute': 'value'}
        body = b'{"attribute": "value"}'

        resp = wsgi.render_response(body=data)
        self.assertEqual(resp.status, '200 OK')
        self.assertEqual(resp.status_int, 200)
        self.assertEqual(resp.body, body)
        self.assertEqual(resp.headers.get('Vary'), 'X-Auth-Token')
        self.assertEqual(resp.headers.get('Content-Length'), str(len(body)))

    def test_render_response_custom_status(self):
        resp = wsgi.render_response(status=(501, 'Not Implemented'))
        self.assertEqual(resp.status, '501 Not Implemented')
        self.assertEqual(resp.status_int, 501)

    def test_successful_require_attribute(self):
        app = FakeAttributeCheckerApp()
        req = self._make_request(url='/?1=2')
        resp = req.get_response(app)
        app.assert_attribute(resp.body, '1')

    def test_require_attribute_fail_if_attribute_not_present(self):
        app = FakeAttributeCheckerApp()
        req = self._make_request(url='/?1=2')
        resp = req.get_response(app)
        self.assertRaises(exception.ValidationError,
                          app.assert_attribute, resp.body, 'a')

    def test_successful_require_multiple_attributes(self):
        app = FakeAttributeCheckerApp()
        req = self._make_request(url='/?a=1&b=2')
        resp = req.get_response(app)
        app.assert_attributes(resp.body, ['a', 'b'])

    def test_attribute_missing_from_request(self):
        app = FakeAttributeCheckerApp()
        req = self._make_request(url='/?a=1&b=2')
        resp = req.get_response(app)
        ex = self.assertRaises(exception.ValidationError,
                               app.assert_attributes,
                               resp.body, ['a', 'missing_attribute'])
        self.assertThat(six.text_type(ex),
                        matchers.Contains('missing_attribute'))

    def test_no_required_attributes_present(self):
        app = FakeAttributeCheckerApp()
        req = self._make_request(url='/')
        resp = req.get_response(app)

        ex = self.assertRaises(exception.ValidationError,
                               app.assert_attributes, resp.body,
                               ['missing_attribute1', 'missing_attribute2'])
        self.assertThat(six.text_type(ex),
                        matchers.Contains('missing_attribute1'))
        self.assertThat(six.text_type(ex),
                        matchers.Contains('missing_attribute2'))

    def test_render_response_custom_headers(self):
        resp = wsgi.render_response(headers=[('Custom-Header', 'Some-Value')])
        self.assertEqual(resp.headers.get('Custom-Header'), 'Some-Value')
        self.assertEqual(resp.headers.get('Vary'), 'X-Auth-Token')

    def test_render_response_no_body(self):
        resp = wsgi.render_response()
        self.assertEqual(resp.status, '204 No Content')
        self.assertEqual(resp.status_int, 204)
        self.assertEqual(resp.body, b'')
        self.assertEqual(resp.headers.get('Content-Length'), '0')
        self.assertIsNone(resp.headers.get('Content-Type'))

    def test_render_response_head_with_body(self):
        resp = wsgi.render_response({'id': uuid.uuid4().hex}, method='HEAD')
        self.assertEqual(resp.status_int, 200)
        self.assertEqual(resp.body, b'')
        self.assertNotEqual(resp.headers.get('Content-Length'), '0')
        self.assertEqual(resp.headers.get('Content-Type'), 'application/json')

    def test_application_local_config(self):
        class FakeApp(wsgi.Application):
            def __init__(self, *args, **kwargs):
                self.kwargs = kwargs

        app = FakeApp.factory({}, testkey="test")
        self.assertIn("testkey", app.kwargs)
        self.assertEqual("test", app.kwargs["testkey"])

    def test_render_exception(self):
        e = exception.Unauthorized(message=u'\u7f51\u7edc')
        resp = wsgi.render_exception(e)
        self.assertEqual(resp.status_int, 401)

    def test_render_exception_host(self):
        e = exception.Unauthorized(message=u'\u7f51\u7edc')
        context = {'host_url': 'http://%s:5000' % uuid.uuid4().hex}
        resp = wsgi.render_exception(e, context=context)

        self.assertEqual(resp.status_int, 401)


class ExtensionRouterTest(BaseWSGITest):
    def test_extensionrouter_local_config(self):
        class FakeRouter(wsgi.ExtensionRouter):
            def __init__(self, *args, **kwargs):
                self.kwargs = kwargs

        factory = FakeRouter.factory({}, testkey="test")
        app = factory(self.app)
        self.assertIn("testkey", app.kwargs)
        self.assertEqual("test", app.kwargs["testkey"])


class MiddlewareTest(BaseWSGITest):
    def test_middleware_request(self):
        class FakeMiddleware(wsgi.Middleware):
            def process_request(self, req):
                req.environ['fake_request'] = True
                return req
        req = self._make_request()
        resp = FakeMiddleware(None)(req)
        self.assertIn('fake_request', resp.environ)

    def test_middleware_response(self):
        class FakeMiddleware(wsgi.Middleware):
            def process_response(self, request, response):
                response.environ = {}
                response.environ['fake_response'] = True
                return response
        req = self._make_request()
        resp = FakeMiddleware(self.app)(req)
        self.assertIn('fake_response', resp.environ)

    def test_middleware_bad_request(self):
        class FakeMiddleware(wsgi.Middleware):
            def process_response(self, request, response):
                raise exception.Unauthorized()

        req = self._make_request()
        req.environ['REMOTE_ADDR'] = '127.0.0.1'
        resp = FakeMiddleware(self.app)(req)
        self.assertEqual(resp.status_int, exception.Unauthorized.code)

    def test_middleware_type_error(self):
        class FakeMiddleware(wsgi.Middleware):
            def process_response(self, request, response):
                raise TypeError()

        req = self._make_request()
        req.environ['REMOTE_ADDR'] = '127.0.0.1'
        resp = FakeMiddleware(self.app)(req)
        # This is a validationerror type
        self.assertEqual(resp.status_int, exception.ValidationError.code)

    def test_middleware_exception_error(self):

        exception_str = b'EXCEPTIONERROR'

        class FakeMiddleware(wsgi.Middleware):
            def process_response(self, request, response):
                raise exception.UnexpectedError(exception_str)

        def do_request():
            req = self._make_request()
            resp = FakeMiddleware(self.app)(req)
            self.assertEqual(resp.status_int, exception.UnexpectedError.code)
            return resp

        # Exception data should not be in the message when debug is False
        self.config_fixture.config(debug=False)
        self.assertNotIn(exception_str, do_request().body)

        # Exception data should be in the message when debug is True
        self.config_fixture.config(debug=True)
        self.assertIn(exception_str, do_request().body)

    def test_middleware_local_config(self):
        class FakeMiddleware(wsgi.Middleware):
            def __init__(self, *args, **kwargs):
                self.kwargs = kwargs

        factory = FakeMiddleware.factory({}, testkey="test")
        app = factory(self.app)
        self.assertIn("testkey", app.kwargs)
        self.assertEqual("test", app.kwargs["testkey"])


class LocalizedResponseTest(tests.TestCase):
    def test_request_match_default(self):
        # The default language if no Accept-Language is provided is None
        req = webob.Request.blank('/')
        self.assertIsNone(wsgi.best_match_language(req))

    @mock.patch.object(oslo_i18n, 'get_available_languages')
    def test_request_match_language_expected(self, mock_gal):
        # If Accept-Language is a supported language, best_match_language()
        # returns it.

        language = uuid.uuid4().hex
        mock_gal.return_value = [language]

        req = webob.Request.blank('/', headers={'Accept-Language': language})
        self.assertEqual(wsgi.best_match_language(req), language)

    @mock.patch.object(oslo_i18n, 'get_available_languages')
    def test_request_match_language_unexpected(self, mock_gal):
        # If Accept-Language is a language we do not support,
        # best_match_language() returns None.

        supported_language = uuid.uuid4().hex
        mock_gal.return_value = [supported_language]

        request_language = uuid.uuid4().hex
        req = webob.Request.blank(
            '/', headers={'Accept-Language': request_language})
        self.assertIsNone(wsgi.best_match_language(req))

    def test_static_translated_string_is_lazy_translatable(self):
        # Statically created message strings are an object that can get
        # lazy-translated rather than a regular string.
        self.assertNotEqual(type(exception.Unauthorized.message_format),
                            six.text_type)

    @mock.patch.object(oslo_i18n, 'get_available_languages')
    def test_get_localized_response(self, mock_gal):
        # If the request has the Accept-Language set to a supported language
        # and an exception is raised by the application that is translatable
        # then the response will have the translated message.

        language = uuid.uuid4().hex
        mock_gal.return_value = [language]

        # The arguments for the xlated message format have to match the args
        # for the chosen exception (exception.NotFound)
        xlated_msg_fmt = "Xlated NotFound, %(target)s."

        # Fake out gettext.translation() to return a translator for our
        # expected language and a passthrough translator for other langs.

        def fake_translation(*args, **kwargs):
            class IdentityTranslator(object):
                def ugettext(self, msgid):
                    return msgid

                gettext = ugettext

            class LangTranslator(object):
                def ugettext(self, msgid):
                    if msgid == exception.NotFound.message_format:
                        return xlated_msg_fmt
                    return msgid

                gettext = ugettext

            if language in kwargs.get('languages', []):
                return LangTranslator()
            return IdentityTranslator()

        with mock.patch.object(gettext, 'translation',
                               side_effect=fake_translation) as xlation_mock:
            target = uuid.uuid4().hex

            # Fake app raises NotFound exception to simulate Keystone raising.

            class FakeApp(wsgi.Application):
                def index(self, context):
                    raise exception.NotFound(target=target)

            # Make the request with Accept-Language on the app, expect an error
            # response with the translated message.

            req = webob.Request.blank('/')
            args = {'action': 'index', 'controller': None}
            req.environ['wsgiorg.routing_args'] = [None, args]
            req.headers['Accept-Language'] = language
            resp = req.get_response(FakeApp())

            # Assert that the translated message appears in the response.

            exp_msg = xlated_msg_fmt % dict(target=target)
            self.assertThat(resp.json['error']['message'],
                            matchers.Equals(exp_msg))
            self.assertThat(xlation_mock.called, matchers.Equals(True))


class ServerTest(tests.TestCase):

    def setUp(self):
        super(ServerTest, self).setUp()
        self.host = '127.0.0.1'
        self.port = '1234'

    @mock.patch('eventlet.listen')
    @mock.patch('socket.getaddrinfo')
    def test_keepalive_unset(self, mock_getaddrinfo, mock_listen):
        mock_getaddrinfo.return_value = [(1, 2, 3, 4, 5)]
        mock_sock_dup = mock_listen.return_value.dup.return_value

        server = environment.Server(mock.MagicMock(), host=self.host,
                                    port=self.port)
        server.start()
        self.addCleanup(server.stop)
        self.assertTrue(mock_listen.called)
        self.assertFalse(mock_sock_dup.setsockopt.called)

    @mock.patch('eventlet.listen')
    @mock.patch('socket.getaddrinfo')
    def test_keepalive_set(self, mock_getaddrinfo, mock_listen):
        mock_getaddrinfo.return_value = [(1, 2, 3, 4, 5)]
        mock_sock_dup = mock_listen.return_value.dup.return_value

        server = environment.Server(mock.MagicMock(), host=self.host,
                                    port=self.port, keepalive=True)
        server.start()
        self.addCleanup(server.stop)
        mock_sock_dup.setsockopt.assert_called_once_with(socket.SOL_SOCKET,
                                                         socket.SO_KEEPALIVE,
                                                         1)
        self.assertTrue(mock_listen.called)

    @mock.patch('eventlet.listen')
    @mock.patch('socket.getaddrinfo')
    def test_keepalive_and_keepidle_set(self, mock_getaddrinfo, mock_listen):
        mock_getaddrinfo.return_value = [(1, 2, 3, 4, 5)]
        mock_sock_dup = mock_listen.return_value.dup.return_value

        server = environment.Server(mock.MagicMock(), host=self.host,
                                    port=self.port, keepalive=True,
                                    keepidle=1)
        server.start()
        self.addCleanup(server.stop)

        self.assertEqual(mock_sock_dup.setsockopt.call_count, 2)

        # Test the last set of call args i.e. for the keepidle
        mock_sock_dup.setsockopt.assert_called_with(socket.IPPROTO_TCP,
                                                    socket.TCP_KEEPIDLE,
                                                    1)

        self.assertTrue(mock_listen.called)