Best Python code snippet using localstack_python
generic_proxy.py
Source: generic_proxy.py
...354 @classmethod355 def get(cls: Type[T], region: str = None, account_id: str = None) -> T:356 cls.initialise()357 region = region or cls.get_current_request_region()358 account_id = account_id or cls.get_current_request_account_id()359 # Class attributes in RegionBackend need two types of data isolation:360 # - Class attributes like `_ACCOUNT_BACKENDS` must refer to the same mutable object across ALL instances.361 # - Class attributes defined in subclasses represent data common across regions but same account IDs362 # To enable this, we keep copies of this class in `_ACCOUNT_CLS` by account IDs and instantiate that363 # copy of the class for different regions and same account ID364 if MULTI_ACCOUNTS and account_id not in cls._ACCOUNTS_CLS:365 # @classmethod descriptors will be part of a cls.__dict__, but they cannot be pickled by deepcopy366 data = {k: v for k, v in cls.__dict__.items() if not inspect.ismethoddescriptor(v)}367 cls_dict = copy.deepcopy(data)368 cls_dict["_ACCOUNTS_CLS"] = cls._ACCOUNTS_CLS369 cls_dict["_ACCOUNT_BACKENDS"] = cls._ACCOUNT_BACKENDS370 cls._ACCOUNTS_CLS[account_id] = type(cls.__name__, cls.__bases__, cls_dict)371 regions = cls.regions()372 backend = regions.get(region)373 if not backend:374 if MULTI_ACCOUNTS:375 backend = cls._ACCOUNTS_CLS[account_id]()376 else:377 backend = cls()378 backend.name = region379 backend.account_id = account_id380 regions[region] = backend381 return regions[region]382 @classmethod383 def initialise(cls):384 if not hasattr(cls, "_ACCOUNT_BACKENDS"):385 cls._ACCOUNT_BACKENDS = defaultdict(lambda: dict())386 if not hasattr(cls, "_ACCOUNTS_CLS"):387 cls._ACCOUNTS_CLS = dict()388 if not hasattr(cls, "REGIONS"):389 cls.REGIONS = dict()390 @classmethod391 def regions(cls: Type[T]) -> Dict[str, T]:392 """Return a map of all regions and backend instances."""393 cls.initialise()394 account_id = cls.get_current_request_account_id()395 return cls._ACCOUNT_BACKENDS[account_id]396 @classmethod397 def get_current_request_region(cls) -> str:398 return aws_stack.get_region()399 @classmethod400 def get_current_request_account_id(cls) -> str:401 return get_aws_account_id()402 @classmethod403 def reset(cls):404 """Reset the (in-memory) state of this service region backend."""405 cls.initialise()406 cls.REGIONS = {}407 account_id = cls.get_current_request_account_id()408 cls._ACCOUNT_BACKENDS[account_id] = {}409# ---------------------410# PROXY LISTENER UTILS411# ---------------------412def append_cors_headers(413 request_headers: Dict = None, response: Union[Response, LambdaResponse] = None414):415 # use this config to disable returning CORS headers entirely (more restrictive security setting)416 if config.DISABLE_CORS_HEADERS:417 return418 # Note: Use "response is None" here instead of "not response"419 headers = {} if response is None else response.headers420 # In case we have LambdaResponse, copy multivalue headers to regular headers, since421 # CaseInsensitiveDict does not support "__contains__" and it's easier to deal with...
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