41 lines
1.2 KiB
Python
41 lines
1.2 KiB
Python
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import secrets
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import time
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class TencentIMPairing:
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def __init__(self, code_ttl: int = 600):
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self._codes: dict[str, tuple[str, float]] = {}
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self._generated: dict[str, float] = {}
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self._ttl = code_ttl
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self._rate_limit = 300
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def generate(self, user_id: str) -> str | None:
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now = time.time()
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last_gen = self._generated.get(user_id, 0)
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if now - last_gen < self._rate_limit:
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return None
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code = secrets.token_hex(3).upper()
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self._codes[code] = (user_id, now)
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self._generated[user_id] = now
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self._cleanup()
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return code
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def verify(self, user_id: str, code: str) -> bool:
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entry = self._codes.get(code)
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if entry is None:
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return False
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stored_user_id, created_at = entry
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if time.time() - created_at > self._ttl:
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del self._codes[code]
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return False
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if stored_user_id == user_id:
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del self._codes[code]
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return True
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return False
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def _cleanup(self):
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now = time.time()
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expired = [k for k, (_, t) in self._codes.items() if now - t > self._ttl]
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for k in expired:
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del self._codes[k]
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