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49 lines
1.2 KiB
Python
49 lines
1.2 KiB
Python
import hashlib
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import re
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import secrets
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from typing import TYPE_CHECKING, Callable, List, Optional, TypeVar
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if TYPE_CHECKING:
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from hashlib import _Hash
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T = TypeVar("T")
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def make_safe_digest(string: str, hash_func: "Callable[[bytes], _Hash]" = hashlib.sha1) -> str:
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"""
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return a hex digest of `string`.
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"""
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# hashlib.sha1, md5, etc. expect bytes, so non-ASCII strings must
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# be encoded.
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return hash_func(string.encode()).hexdigest()
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def generate_api_key() -> str:
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api_key = ""
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while len(api_key) < 32:
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# One iteration suffices 99.4992% of the time.
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api_key += secrets.token_urlsafe(3 * 9).replace("_", "").replace("-", "")
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return api_key[:32]
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def has_api_key_format(key: str) -> bool:
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return bool(re.fullmatch(r"([A-Za-z0-9]){32}", key))
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def assert_is_not_none(value: Optional[T]) -> T:
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assert value is not None
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return value
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def process_list_in_batches(
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lst: List[T], chunk_size: int, process_batch: Callable[[List[T]], None]
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) -> None:
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offset = 0
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while True:
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items = lst[offset : offset + chunk_size]
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if not items:
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break
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process_batch(items)
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offset += chunk_size
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