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Merge pull request #3 from MeltanoLabs/auth_refactor
refactor: Auth refactor
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@@ -134,4 +134,4 @@ dmypy.json | |
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| # Pyre type checker | ||
| .pyre/ | ||
| .vscode/launch.json | ||
| .vscode/* | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| import logging | ||
| import os | ||
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| import boto3 | ||
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| class AWSAuth: | ||
| def __init__(self, config): | ||
| # config for use environment variables | ||
| if config.get("use_aws_env_vars"): | ||
| self.aws_access_key_id = os.environ.get("AWS_ACCESS_KEY_ID") | ||
| self.aws_secret_access_key = os.environ.get("AWS_SECRET_ACCESS_KEY") | ||
| self.aws_session_token = os.environ.get("AWS_SESSION_TOKEN") | ||
| self.aws_profile = os.environ.get("AWS_PROFILE") | ||
| self.aws_default_region = os.environ.get("AWS_DEFAULT_REGION") | ||
| else: | ||
| self.aws_access_key_id = config.get("aws_access_key_id") | ||
| self.aws_secret_access_key = config.get("aws_secret_access_key") | ||
| self.aws_session_token = config.get("aws_session_token") | ||
| self.aws_profile = config.get("aws_profile") | ||
| self.aws_default_region = config.get("aws_default_region") | ||
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| self.aws_endpoint_url = config.get("aws_endpoint_url") | ||
| self.aws_assume_role_arn = config.get("aws_assume_role_arn") | ||
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| self.logger = logging.getLogger(__name__) | ||
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| def get_session(self): | ||
| session = None | ||
| if ( | ||
| self.aws_access_key_id | ||
| and self.aws_secret_access_key | ||
| and self.aws_session_token | ||
| and self.aws_default_region | ||
| ): | ||
| session = boto3.Session( | ||
| aws_access_key_id=self.aws_access_key_id, | ||
| aws_secret_access_key=self.aws_secret_access_key, | ||
| aws_session_token=self.aws_session_token, | ||
| region_name=self.aws_default_region, | ||
| ) | ||
| elif ( | ||
| self.aws_access_key_id | ||
| and self.aws_secret_access_key | ||
| and self.aws_default_region | ||
| ): | ||
| session = boto3.Session( | ||
| aws_access_key_id=self.aws_access_key_id, | ||
| aws_secret_access_key=self.aws_secret_access_key, | ||
| region_name=self.aws_default_region, | ||
| ) | ||
| elif self.aws_profile: | ||
| session = boto3.Session(profile_name=self.aws_profile) | ||
| self.logger.info("Using installed shared credentials file.") | ||
| else: | ||
| raise Exception("Explicit AWS auth not provided") | ||
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| if self.aws_assume_role_arn: | ||
| if not session: | ||
| raise Exception("Insufficient inputs for AWS Auth.") | ||
| session = self._assume_role(session, self.aws_assume_role_arn) | ||
| return session | ||
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| def _factory(self, aws_obj, service_name): | ||
| if self.aws_endpoint_url: | ||
| return aws_obj( | ||
| service_name, | ||
| endpoint_url=self.aws_endpoint_url, | ||
| ) | ||
| else: | ||
| return aws_obj( | ||
| service_name, | ||
| ) | ||
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| def get_resource(self, session, service_name): | ||
| return self._factory(session.resource, service_name) | ||
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| def get_client(self, session, service_name): | ||
| return self._factory(session.client, service_name) | ||
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| def _assume_role(self, session, role_arn): | ||
| # TODO: use for auto refresh https://github.com/benkehoe/aws-assume-role-lib | ||
| sts_client = self.get_client(session, "sts") | ||
| response = sts_client.assume_role( | ||
| RoleArn=role_arn, RoleSessionName="tap-dynamodb" | ||
| ) | ||
| return boto3.Session( | ||
| aws_access_key_id=response["Credentials"]["AccessKeyId"], | ||
| aws_secret_access_key=response["Credentials"]["SecretAccessKey"], | ||
| aws_session_token=response["Credentials"]["SessionToken"], | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| import logging | ||
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| from tap_dynamodb.aws_auth import AWSAuth | ||
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| class AWSBase: | ||
| def __init__(self, config, service_name): | ||
| self._service_name = service_name | ||
| self._config = config | ||
| self._client = None | ||
| self._resource = None | ||
| self.logger = logging.getLogger(__name__) | ||
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| @property | ||
| def client(self): | ||
| if self._client: | ||
| return self._client | ||
| else: | ||
| auth_obj = AWSAuth(self._config) | ||
| session = auth_obj.get_session() | ||
| self._client = auth_obj.get_client(session, self._service_name) | ||
| return self._client | ||
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| @property | ||
| def resource(self): | ||
| if self._resource: | ||
| return self._resource | ||
| else: | ||
| auth_obj = AWSAuth(self._config) | ||
| session = auth_obj.get_session() | ||
| self._resource = auth_obj.get_resource(session, self._service_name) | ||
| return self._resource |
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