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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2025-08-05 17:14
__init__.py	121 B	-rw-r--r--	2025-08-05 17:14
adaptive.py	4.11 KB	-rw-r--r--	2025-08-05 17:14
base.py	797 B	-rw-r--r--	2025-08-05 17:14
bucket.py	3.9 KB	-rw-r--r--	2025-08-05 17:14
quota.py	1.89 KB	-rw-r--r--	2025-08-05 17:14
special.py	1.62 KB	-rw-r--r--	2025-08-05 17:14
standard.py	19.51 KB	-rw-r--r--	2025-08-05 17:14
throttling.py	1.74 KB	-rw-r--r--	2025-08-05 17:14

Rename

"""Special cased retries.

These are additional retry cases we still have to handle from the legacy
retry handler.  They don't make sense as part of the standard mode retry
module.  Ideally we should be able to remove this module.

"""
import logging
from binascii import crc32

from botocore.retries.base import BaseRetryableChecker

logger = logging.getLogger(__name__)

# TODO: This is an ideal candidate for the retryable trait once that's
# available.
class RetryIDPCommunicationError(BaseRetryableChecker):
    _SERVICE_NAME = 'sts'

def is_retryable(self, context):
        service_name = context.operation_model.service_model.service_name
        if service_name != self._SERVICE_NAME:
            return False
        error_code = context.get_error_code()
        return error_code == 'IDPCommunicationError'

class RetryDDBChecksumError(BaseRetryableChecker):
    _CHECKSUM_HEADER = 'x-amz-crc32'
    _SERVICE_NAME = 'dynamodb'

def is_retryable(self, context):
        service_name = context.operation_model.service_model.service_name
        if service_name != self._SERVICE_NAME:
            return False
        if context.http_response is None:
            return False
        checksum = context.http_response.headers.get(self._CHECKSUM_HEADER)
        if checksum is None:
            return False
        actual_crc32 = crc32(context.http_response.content) & 0xFFFFFFFF
        if actual_crc32 != int(checksum):
            logger.debug(
                "DynamoDB crc32 checksum does not match, "
                "expected: %s, actual: %s",
                checksum,
                actual_crc32,
            )
            return True