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51 lines
1.6 KiB
51 lines
1.6 KiB
6 months ago
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"""Special cased retries.
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These are additional retry cases we still have to handle from the legacy
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retry handler. They don't make sense as part of the standard mode retry
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module. Ideally we should be able to remove this module.
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"""
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import logging
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from binascii import crc32
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from botocore.retries.base import BaseRetryableChecker
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logger = logging.getLogger(__name__)
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# TODO: This is an ideal candidate for the retryable trait once that's
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# available.
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class RetryIDPCommunicationError(BaseRetryableChecker):
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_SERVICE_NAME = 'sts'
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def is_retryable(self, context):
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service_name = context.operation_model.service_model.service_name
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if service_name != self._SERVICE_NAME:
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return False
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error_code = context.get_error_code()
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return error_code == 'IDPCommunicationError'
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class RetryDDBChecksumError(BaseRetryableChecker):
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_CHECKSUM_HEADER = 'x-amz-crc32'
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_SERVICE_NAME = 'dynamodb'
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def is_retryable(self, context):
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service_name = context.operation_model.service_model.service_name
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if service_name != self._SERVICE_NAME:
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return False
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if context.http_response is None:
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return False
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checksum = context.http_response.headers.get(self._CHECKSUM_HEADER)
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if checksum is None:
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return False
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actual_crc32 = crc32(context.http_response.content) & 0xFFFFFFFF
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if actual_crc32 != int(checksum):
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logger.debug(
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"DynamoDB crc32 checksum does not match, "
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"expected: %s, actual: %s",
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checksum,
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actual_crc32,
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)
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return True
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