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|
# Copyright 2012-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.
from tests import unittest
from mock import Mock, patch, sentinel
from nose.tools import assert_equals
from requests import ConnectionError
from botocore.compat import six
from botocore.awsrequest import AWSRequest
from botocore.endpoint import Endpoint, DEFAULT_TIMEOUT
from botocore.endpoint import EndpointCreator
from botocore.endpoint import BotocoreHTTPSession
from botocore.exceptions import EndpointConnectionError
from botocore.exceptions import ConnectionClosedError
from botocore.exceptions import BaseEndpointResolverError
def request_dict():
return {
'headers': {},
'body': '',
'url_path': '/',
'query_string': '',
'method': 'POST',
'url': 'https://example.com',
'context': {}
}
class RecordStreamResets(six.StringIO):
def __init__(self, value):
six.StringIO.__init__(self, value)
self.total_resets = 0
def seek(self, where):
self.total_resets += 1
six.StringIO.seek(self, where)
class TestEndpointBase(unittest.TestCase):
def setUp(self):
self.op = Mock()
self.op.has_streaming_output = False
self.op.metadata = {'protocol': 'json'}
self.event_emitter = Mock()
self.event_emitter.emit.return_value = []
self.factory_patch = patch(
'botocore.parsers.ResponseParserFactory')
self.factory = self.factory_patch.start()
self.endpoint = Endpoint(
'https://ec2.us-west-2.amazonaws.com/',
endpoint_prefix='ec2',
event_emitter=self.event_emitter)
self.http_session = Mock()
self.http_session.send.return_value = Mock(
status_code=200, headers={}, content=b'{"Foo": "bar"}',
)
self.endpoint.http_session = self.http_session
def tearDown(self):
self.factory_patch.stop()
class TestEndpointFeatures(TestEndpointBase):
def test_timeout_can_be_specified(self):
timeout_override = 120
self.endpoint.timeout = timeout_override
self.endpoint.make_request(self.op, request_dict())
kwargs = self.http_session.send.call_args[1]
self.assertEqual(kwargs['timeout'], timeout_override)
def test_make_request_with_proxies(self):
proxies = {'http': 'http://localhost:8888'}
self.endpoint.proxies = proxies
self.endpoint.make_request(self.op, request_dict())
prepared_request = self.http_session.send.call_args[0][0]
self.http_session.send.assert_called_with(
prepared_request, verify=True, stream=False,
proxies=proxies, timeout=DEFAULT_TIMEOUT)
def test_make_request_with_no_auth(self):
self.endpoint.auth = None
self.endpoint.make_request(self.op, request_dict())
# http_session should be used to send the request.
self.assertTrue(self.http_session.send.called)
prepared_request = self.http_session.send.call_args[0][0]
self.assertNotIn('Authorization', prepared_request.headers)
def test_make_request_no_signature_version(self):
self.endpoint.make_request(self.op, request_dict())
# http_session should be used to send the request.
self.assertTrue(self.http_session.send.called)
prepared_request = self.http_session.send.call_args[0][0]
self.assertNotIn('Authorization', prepared_request.headers)
def test_make_request_injects_better_dns_error_msg(self):
fake_request = Mock(url='https://ec2.us-west-2.amazonaws.com')
self.http_session.send.side_effect = ConnectionError(
"Fake gaierror(8, node or host not known)", request=fake_request)
with self.assertRaisesRegexp(EndpointConnectionError,
'Could not connect'):
self.endpoint.make_request(self.op, request_dict())
def test_make_request_injects_better_bad_status_line_error_msg(self):
fake_request = Mock(url='https://ec2.us-west-2.amazonaws.com')
self.http_session.send.side_effect = ConnectionError(
"""'Connection aborted.', BadStatusLine("''",)""",
request=fake_request)
with self.assertRaisesRegexp(ConnectionClosedError,
'Connection was closed'):
self.endpoint.make_request(self.op, request_dict())
def test_make_request_with_context(self):
r = request_dict()
r['context'] = {'signing': {'region': 'us-west-2'}}
with patch('botocore.endpoint.Endpoint.prepare_request') as prepare:
self.endpoint.make_request(self.op, r)
request = prepare.call_args[0][0]
self.assertEqual(request.context['signing']['region'], 'us-west-2')
def test_can_specify_max_pool_connections(self):
endpoint = Endpoint('https://ec2.us-west-2.amazonaws.com', 'ec2',
self.event_emitter, max_pool_connections=50)
# We can look in endpoint.http_session.adapters[0]._pool_maxsize,
# but that feels like testing too much implementation detail.
self.assertEqual(endpoint.max_pool_connections, 50)
class TestRetryInterface(TestEndpointBase):
def setUp(self):
super(TestRetryInterface, self).setUp()
self.retried_on_exception = None
def test_retry_events_are_emitted(self):
op = Mock()
op.name = 'DescribeInstances'
op.metadata = {'protocol': 'query'}
op.has_streaming_output = False
self.endpoint.make_request(op, request_dict())
call_args = self.event_emitter.emit.call_args
self.assertEqual(call_args[0][0],
'needs-retry.ec2.DescribeInstances')
def test_retry_events_can_alter_behavior(self):
op = Mock()
op.name = 'DescribeInstances'
op.metadata = {'protocol': 'json'}
self.event_emitter.emit.side_effect = [
[(None, None)], # Request created.
[(None, 0)], # Check if retry needed. Retry needed.
[(None, None)], # Request created.
[(None, None)] # Check if retry needed. Retry not needed.
]
self.endpoint.make_request(op, request_dict())
call_args = self.event_emitter.emit.call_args_list
self.assertEqual(self.event_emitter.emit.call_count, 4)
# Check that all of the events are as expected.
self.assertEqual(call_args[0][0][0],
'request-created.ec2.DescribeInstances')
self.assertEqual(call_args[1][0][0],
'needs-retry.ec2.DescribeInstances')
self.assertEqual(call_args[2][0][0],
'request-created.ec2.DescribeInstances')
self.assertEqual(call_args[3][0][0],
'needs-retry.ec2.DescribeInstances')
def test_retry_on_socket_errors(self):
op = Mock()
op.name = 'DescribeInstances'
self.event_emitter.emit.side_effect = [
[(None, None)], # Request created.
[(None, 0)], # Check if retry needed. Retry needed.
[(None, None)], # Request created
[(None, None)] # Check if retry needed. Retry not needed.
]
self.http_session.send.side_effect = ConnectionError()
with self.assertRaises(ConnectionError):
self.endpoint.make_request(op, request_dict())
call_args = self.event_emitter.emit.call_args_list
self.assertEqual(self.event_emitter.emit.call_count, 4)
# Check that all of the events are as expected.
self.assertEqual(call_args[0][0][0],
'request-created.ec2.DescribeInstances')
self.assertEqual(call_args[1][0][0],
'needs-retry.ec2.DescribeInstances')
self.assertEqual(call_args[2][0][0],
'request-created.ec2.DescribeInstances')
self.assertEqual(call_args[3][0][0],
'needs-retry.ec2.DescribeInstances')
def test_retry_attempts_added_to_response_metadata(self):
op = Mock(name='DescribeInstances')
op.metadata = {'protocol': 'query'}
self.event_emitter.emit.side_effect = [
[(None, None)], # Request created.
[(None, 0)], # Check if retry needed. Retry needed.
[(None, None)], # Request created.
[(None, None)] # Check if retry needed. Retry not needed.
]
parser = Mock()
parser.parse.return_value = {'ResponseMetadata': {}}
self.factory.return_value.create_parser.return_value = parser
response = self.endpoint.make_request(op, request_dict())
self.assertEqual(response[1]['ResponseMetadata']['RetryAttempts'], 1)
def test_retry_attempts_is_zero_when_not_retried(self):
op = Mock(name='DescribeInstances', metadata={'protocol': 'query'})
self.event_emitter.emit.side_effect = [
[(None, None)], # Request created.
[(None, None)], # Check if retry needed. Retry needed.
]
parser = Mock()
parser.parse.return_value = {'ResponseMetadata': {}}
self.factory.return_value.create_parser.return_value = parser
response = self.endpoint.make_request(op, request_dict())
self.assertEqual(response[1]['ResponseMetadata']['RetryAttempts'], 0)
class TestS3ResetStreamOnRetry(TestEndpointBase):
def setUp(self):
super(TestS3ResetStreamOnRetry, self).setUp()
def max_attempts_retry_handler(self, attempts, **kwargs):
# Simulate a max requests of 3.
self.total_calls += 1
if attempts == 3:
return None
else:
# Returning anything non-None will trigger a retry,
# but 0 here is so that time.sleep(0) happens.
return 0
def test_reset_stream_on_retry(self):
op = Mock()
body = RecordStreamResets('foobar')
op.name = 'PutObject'
op.has_streaming_output = True
op.metadata = {'protocol': 'rest-xml'}
request = request_dict()
request['body'] = body
self.event_emitter.emit.side_effect = [
[(None, None)], # Request created.
[(None, 0)], # Check if retry needed. Needs Retry.
[(None, None)], # Request created.
[(None, 0)], # Check if retry needed again. Needs Retry.
[(None, None)], # Request created.
[(None, None)], # Finally emit no rety is needed.
]
self.endpoint.make_request(op, request)
self.assertEqual(body.total_resets, 2)
class TestEndpointCreator(unittest.TestCase):
def setUp(self):
self.service_model = Mock(
endpoint_prefix='ec2', signature_version='v2',
signing_name='ec2')
self.environ = {}
self.environ_patch = patch('os.environ', self.environ)
self.environ_patch.start()
self.creator = EndpointCreator(Mock())
def tearDown(self):
self.environ_patch.stop()
def test_creates_endpoint_with_configured_url(self):
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-east-1',
endpoint_url='https://endpoint.url')
self.assertEqual(endpoint.host, 'https://endpoint.url')
def test_create_endpoint_with_default_timeout(self):
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com')
self.assertEqual(endpoint.timeout, DEFAULT_TIMEOUT)
def test_create_endpoint_with_customized_timeout(self):
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com', timeout=123)
self.assertEqual(endpoint.timeout, 123)
def test_get_endpoint_default_verify_ssl(self):
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com')
self.assertTrue(endpoint.verify)
def test_verify_ssl_can_be_disabled(self):
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com', verify=False)
self.assertFalse(endpoint.verify)
def test_verify_ssl_can_specify_cert_bundle(self):
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com', verify='/path/cacerts.pem')
self.assertEqual(endpoint.verify, '/path/cacerts.pem')
def test_honor_cert_bundle_env_var(self):
self.environ['REQUESTS_CA_BUNDLE'] = '/env/cacerts.pem'
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com')
self.assertEqual(endpoint.verify, '/env/cacerts.pem')
def test_env_ignored_if_explicitly_passed(self):
self.environ['REQUESTS_CA_BUNDLE'] = '/env/cacerts.pem'
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com', verify='/path/cacerts.pem')
# /path/cacerts.pem wins over the value from the env var.
self.assertEqual(endpoint.verify, '/path/cacerts.pem')
def test_can_specify_max_pool_conns(self):
endpoint = self.creator.create_endpoint(
self.service_model, region_name='us-west-2',
endpoint_url='https://example.com',
max_pool_connections=100
)
self.assertEqual(endpoint.max_pool_connections, 100)
class TestAWSSession(unittest.TestCase):
def test_auth_header_preserved_from_s3_redirects(self):
request = AWSRequest()
request.url = 'https://bucket.s3.amazonaws.com/'
request.method = 'GET'
request.headers['Authorization'] = 'original auth header'
prepared_request = request.prepare()
fake_response = Mock()
fake_response.headers = {
'location': 'https://bucket.s3-us-west-2.amazonaws.com'}
fake_response.url = request.url
fake_response.status_code = 307
fake_response.is_permanent_redirect = False
# This line is needed to disable the cookie handling
# code in requests.
fake_response.raw._original_response = None
success_response = Mock()
success_response.raw._original_response = None
success_response.is_redirect = False
success_response.status_code = 200
session = BotocoreHTTPSession()
session.send = Mock(return_value=success_response)
list(session.resolve_redirects(
fake_response, prepared_request, stream=False))
redirected_request = session.send.call_args[0][0]
# The Authorization header for the newly sent request should
# still have our original Authorization header.
self.assertEqual(
redirected_request.headers['Authorization'],
'original auth header')
def test_max_pool_conns_injects_custom_adapter(self):
http_adapter_cls = Mock(return_value=sentinel.HTTP_ADAPTER)
session = BotocoreHTTPSession(max_pool_connections=20,
http_adapter_cls=http_adapter_cls)
http_adapter_cls.assert_called_with(pool_maxsize=20)
self.assertEqual(session.adapters['https://'], sentinel.HTTP_ADAPTER)
self.assertEqual(session.adapters['http://'], sentinel.HTTP_ADAPTER)
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