210 lines
9.1 KiB
Python
210 lines
9.1 KiB
Python
# Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"). You
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# may not use this file except in compliance with the License. A copy of
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# the License is located at
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#
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# http://aws.amazon.com/apache2.0/
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#
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# or in the "license" file accompanying this file. This file is
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# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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# ANY KIND, either express or implied. See the License for the specific
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# language governing permissions and limitations under the License.
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"""Internal module to help with normalizing botocore client args.
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This module (and all function/classes within this module) should be
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considered internal, and *not* a public API.
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"""
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import copy
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import logging
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import botocore.serialize
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from botocore.signers import RequestSigner
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from botocore.config import Config
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from botocore.endpoint import EndpointCreator
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logger = logging.getLogger(__name__)
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class ClientArgsCreator(object):
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def __init__(self, event_emitter, user_agent, response_parser_factory,
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loader, exceptions_factory):
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self._event_emitter = event_emitter
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self._user_agent = user_agent
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self._response_parser_factory = response_parser_factory
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self._loader = loader
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self._exceptions_factory = exceptions_factory
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def get_client_args(self, service_model, region_name, is_secure,
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endpoint_url, verify, credentials, scoped_config,
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client_config, endpoint_bridge):
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final_args = self.compute_client_args(
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service_model, client_config, endpoint_bridge, region_name,
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endpoint_url, is_secure, scoped_config)
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service_name = final_args['service_name']
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parameter_validation = final_args['parameter_validation']
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endpoint_config = final_args['endpoint_config']
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protocol = final_args['protocol']
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config_kwargs = final_args['config_kwargs']
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s3_config = final_args['s3_config']
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partition = endpoint_config['metadata'].get('partition', None)
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signing_region = endpoint_config['signing_region']
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endpoint_region_name = endpoint_config['region_name']
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if signing_region is None and endpoint_region_name is None:
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signing_region, endpoint_region_name = \
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self._get_default_s3_region(service_name, endpoint_bridge)
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config_kwargs['region_name'] = endpoint_region_name
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event_emitter = copy.copy(self._event_emitter)
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signer = RequestSigner(
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service_model.service_id, signing_region,
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endpoint_config['signing_name'],
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endpoint_config['signature_version'],
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credentials, event_emitter
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)
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config_kwargs['s3'] = s3_config
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new_config = Config(**config_kwargs)
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endpoint_creator = EndpointCreator(event_emitter)
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endpoint = endpoint_creator.create_endpoint(
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service_model, region_name=endpoint_region_name,
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endpoint_url=endpoint_config['endpoint_url'], verify=verify,
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response_parser_factory=self._response_parser_factory,
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max_pool_connections=new_config.max_pool_connections,
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proxies=new_config.proxies,
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timeout=(new_config.connect_timeout, new_config.read_timeout))
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serializer = botocore.serialize.create_serializer(
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protocol, parameter_validation)
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response_parser = botocore.parsers.create_parser(protocol)
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return {
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'serializer': serializer,
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'endpoint': endpoint,
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'response_parser': response_parser,
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'event_emitter': event_emitter,
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'request_signer': signer,
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'service_model': service_model,
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'loader': self._loader,
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'client_config': new_config,
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'partition': partition,
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'exceptions_factory': self._exceptions_factory
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}
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def compute_client_args(self, service_model, client_config,
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endpoint_bridge, region_name, endpoint_url,
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is_secure, scoped_config):
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service_name = service_model.endpoint_prefix
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protocol = service_model.metadata['protocol']
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parameter_validation = True
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if client_config and not client_config.parameter_validation:
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parameter_validation = False
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elif scoped_config:
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raw_value = str(scoped_config.get('parameter_validation', ''))
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if raw_value.lower() == 'false':
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parameter_validation = False
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endpoint_config = endpoint_bridge.resolve(
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service_name, region_name, endpoint_url, is_secure)
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# Override the user agent if specified in the client config.
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user_agent = self._user_agent
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if client_config is not None:
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if client_config.user_agent is not None:
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user_agent = client_config.user_agent
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if client_config.user_agent_extra is not None:
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user_agent += ' %s' % client_config.user_agent_extra
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# Create a new client config to be passed to the client based
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# on the final values. We do not want the user to be able
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# to try to modify an existing client with a client config.
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config_kwargs = dict(
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region_name=endpoint_config['region_name'],
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signature_version=endpoint_config['signature_version'],
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user_agent=user_agent)
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if client_config is not None:
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config_kwargs.update(
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connect_timeout=client_config.connect_timeout,
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read_timeout=client_config.read_timeout,
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max_pool_connections=client_config.max_pool_connections,
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proxies=client_config.proxies,
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retries=client_config.retries
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)
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s3_config = self.compute_s3_config(scoped_config,
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client_config)
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return {
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'service_name': service_name,
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'parameter_validation': parameter_validation,
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'user_agent': user_agent,
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'endpoint_config': endpoint_config,
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'protocol': protocol,
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'config_kwargs': config_kwargs,
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's3_config': s3_config,
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}
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def compute_s3_config(self, scoped_config, client_config):
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s3_configuration = None
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# Check the scoped config first.
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if scoped_config is not None:
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s3_configuration = scoped_config.get('s3')
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# Until we have proper validation of the config file (including
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# nested types), we have to account for the fact that the s3
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# key could be parsed as a string, e.g 's3 = foo'.
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# In the case we'll ignore the key for now.
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if not isinstance(s3_configuration, dict):
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logger.debug("The s3 config key is not a dictionary type, "
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"ignoring its value of: %s", s3_configuration)
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s3_configuration = None
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# Convert logic for several s3 keys in the scoped config
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# so that the various strings map to the appropriate boolean value.
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if s3_configuration:
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boolean_keys = ['use_accelerate_endpoint',
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'use_dualstack_endpoint',
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'payload_signing_enabled']
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s3_configuration = self._convert_config_to_bool(
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s3_configuration, boolean_keys)
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# Next specific client config values takes precedence over
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# specific values in the scoped config.
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if client_config is not None:
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if client_config.s3 is not None:
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if s3_configuration is None:
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s3_configuration = client_config.s3
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else:
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# The current s3_configuration dictionary may be
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# from a source that only should be read from so
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# we want to be safe and just make a copy of it to modify
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# before it actually gets updated.
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s3_configuration = s3_configuration.copy()
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s3_configuration.update(client_config.s3)
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return s3_configuration
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def _convert_config_to_bool(self, config_dict, keys):
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# Make sure any further modifications to this section of the config
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# will not affect the scoped config by making a copy of it.
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config_copy = config_dict.copy()
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present_keys = [k for k in keys if k in config_copy]
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for key in present_keys:
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# Normalize on different possible values of True
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if config_copy[key] in [True, 'True', 'true']:
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config_copy[key] = True
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else:
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config_copy[key] = False
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return config_copy
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def _get_default_s3_region(self, service_name, endpoint_bridge):
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# If a user is providing a custom URL, the endpoint resolver will
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# refuse to infer a signing region. If we want to default to s3v4,
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# we have to account for this.
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if service_name == 's3':
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endpoint = endpoint_bridge.resolve('s3')
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return endpoint['signing_region'], endpoint['region_name']
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return None, None
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