o ˷e@sdZddlZddlZddlZddlmZdZdZdZdZ dZ e e Z d d Zefd d Zefd dZddZddZGdddeZdS)z4Shared utilities used by both downloads and uploads.N)commonrangez content-rangezCurrently using crcmod in pure python form. This is a slow implementation. Python 3 has a faster implementation, `google-crc32c`, which will be used if it is installed.z x-goog-hashzNo {checksum_type} checksum was returned from the service while downloading {} (which happens for composite objects), so client-side content integrity checking is not being performed.cCdS)zSimple default callback.Nrrr]/var/www/ideatree/venv/lib/python3.10/site-packages/google/_async_resumable_media/_helpers.py do_nothing)rcCs,||}||vr|t|d|||S)aChecks that a specific header is in a headers dictionary. Args: response (object): An HTTP response object, expected to have a ``headers`` attribute that is a ``Mapping[str, str]``. name (str): The name of a required header. get_headers (Callable[Any, Mapping[str, str]]): Helper to get headers from an HTTP response. callback (Optional[Callable]): A callback that takes no arguments, to be executed when an exception is being raised. Returns: str: The desired header. Raises: ~google.resumable_media.common.InvalidResponse: If the header is missing. z$Response headers must contain headerrInvalidResponse)responsename get_headerscallbackheadersrrrheader_required-srcCs2||}||vr|tj|d|dg|R|S)a`Require a response has a status code among a list. Args: response (object): The HTTP response object. status_codes (tuple): The acceptable status codes. get_status_code (Callable[Any, int]): Helper to get a status code from a response. callback (Optional[Callable]): A callback that takes no arguments, to be executed when an exception is being raised. Returns: int: The status code. Raises: ~google.resumable_media.common.InvalidResponse: If the status code is not one of the values in ``status_codes``. zRequest failed with status codezExpected one ofr )r status_codesget_status_coder status_coderrrrequire_status_codeJsrcCs0d|}||kr |}tdd}||d|fS)aCalculate the amount of time to wait before a retry attempt. Wait time grows exponentially with the number of attempts, until ``max_sleep``. A random amount of jitter (between 0 and 1 seconds) is added to spread out retry attempts from different clients. Args: base_wait (float): The "base" wait time (i.e. without any jitter) that will be doubled until it reaches the maximum sleep. max_sleep (float): Maximum value that a sleep time is allowed to be. Returns: Tuple[float, float]: The new base wait time as well as the wait time to be applied (with a random amount of jitter between 0 and 1 seconds added). g@rigMbP?)randomrandint) base_wait max_sleep new_base_wait jitter_msrrrcalculate_retry_waitis  rc sd}d}d} d}z|IdH}Wnty&}z|}WYd}~nd}~ww||tjvr0|S|||s<|r:||St||j\}} |d7}|| 7}t| q)a[Attempts to retry a call to ``func`` until success. Expects ``func`` to return an HTTP response and uses ``get_status_code`` to check if the response is retry-able. Will retry until :meth:`~.RetryStrategy.retry_allowed` (on the current ``retry_strategy``) returns :data:`False`. Uses :func:`calculate_retry_wait` to double the wait time (with jitter) after each attempt. Args: func (Callable): A callable that takes no arguments and produces an HTTP response which will be checked as retry-able. get_status_code (Callable[Any, int]): Helper to get a status code from a response. retry_strategy (~google.resumable_media.common.RetryStrategy): The strategy to use if the request fails and must be retried. Returns: object: The return value of ``func``. grg?TN)ConnectionErrorr RETRYABLE retry_allowedrrtimesleep) funcrretry_strategy total_sleep num_retriesrerrorr e wait_timerrrwait_and_retrys.  r)c@seZdZdZddZdS)_DoNothingHashzDo-nothing hash object. Intended as a stand-in for ``hashlib.md5`` or a crc32c checksum implementation in cases where it isn't necessary to compute the hash. cCr)zDo-nothing ``update`` method. Intended to match the interface of ``hashlib.md5`` and other checksums. Args: unused_chunk (bytes): A chunk of data. Nr)self unused_chunkrrrupdaterz_DoNothingHash.updateN)__name__ __module__ __qualname____doc__r-rrrrr*s r*)r1loggingrr google.resumable_mediar RANGE_HEADERCONTENT_RANGE_HEADER_SLOW_CRC32C_WARNING _HASH_HEADER_MISSING_CHECKSUM getLoggerr._LOGGERrrrrr)objectr*rrrrs$    4