unknown
97 lines
3.4 KiB
Python
97 lines
3.4 KiB
Python
"""短信验证码服务 —— provider 分派入口（极光主 + 可选创蓝备）。
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对外暴露 `send_code`（返回 SendResult） / `verify_code` / `SmsError` / `SendResult`。
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主 provider = settings.SMS_PROVIDER（默认 jiguang）；备 = settings.SMS_FALLBACK_PROVIDER
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（默认空=无备）。**每次调用读 settings**，支持运行时切换 / 灰度回退。
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"""
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from __future__ import annotations
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import logging
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from app.core.config import settings
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from . import aliyun, chuanglan, jiguang
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from .base import SendResult, SmsError
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__all__ = ["SmsError", "SendResult", "send_code", "verify_code"]
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logger = logging.getLogger("shagua.sms")
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# provider 名 <-> 模块。未知/缺省主 provider 回退 jiguang（防误配把登录打挂）。
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_ALL = {"jiguang": jiguang, "aliyun": aliyun, "chuanglan": chuanglan}
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_NAME = {jiguang: "jiguang", aliyun: "aliyun", chuanglan: "chuanglan"}
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def _primary():
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"""当前主 provider 模块（未知/缺省回退 jiguang）。"""
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return _ALL.get(settings.SMS_PROVIDER, jiguang)
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def _fallback():
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"""启用的备 provider 模块；未配置 / 同主 / 未知名 → None（= 不启用 fallback）。"""
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name = (settings.SMS_FALLBACK_PROVIDER or "").strip()
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if not name or name == settings.SMS_PROVIDER:
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return None
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return _ALL.get(name)
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def _send_with_cooldown(provider, phone: str, cooldown_sec: int | None) -> int:
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if cooldown_sec is None:
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return provider.send_code(phone)
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return provider.send_code(phone, cooldown_sec=cooldown_sec)
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def send_code(
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phone: str,
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*,
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cooldown_sec: int | None = None,
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) -> SendResult:
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"""发码：主成功即返回；仅主「供应商不可用(503)」且配置了备时转备补发。
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429（本地冷却/超频）、400（手机号无效）不转——不绕过防刷、不为无效号白烧。
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备也失败则抛备的 SmsError。调用方传入的动态冷却值在主、备渠道保持一致。
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"""
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primary = _primary()
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fb = _fallback()
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try:
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cooldown = _send_with_cooldown(primary, phone, cooldown_sec)
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return SendResult(cooldown_sec=cooldown, provider=_NAME[primary], fallback=False)
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except SmsError as e:
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if fb is not None and e.status_code == 503:
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logger.warning("[SMS] primary=%s 不可用(%s)，fallback→%s",
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_NAME[primary], e, _NAME[fb])
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cooldown = _send_with_cooldown(fb, phone, cooldown_sec)
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return SendResult(cooldown_sec=cooldown, provider=_NAME[fb], fallback=True)
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raise
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def verify_code(
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phone: str,
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code: str,
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*,
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max_failed_attempts: int | None = None,
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) -> bool:
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"""校验：try-both，遍历「启用的 fallback 链」（主→备），任一命中即 True。
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码只存在实际发码那家（fallback 前主已 pop 掉自己的码），另一家 rec is None 即 False、
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不误判、不累加其防爆破计数。动态失败次数上限会一致传给主备渠道。
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"""
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chain = [_primary()]
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fb = _fallback()
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if fb is not None:
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chain.append(fb)
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for prov in chain:
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verified = (
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prov.verify_code(phone, code)
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if max_failed_attempts is None
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else prov.verify_code(
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phone,
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code,
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max_failed_attempts=max_failed_attempts,
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)
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)
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if verified:
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logger.info("[SMS] verify hit provider=%s", _NAME[prov])
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return True
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return False
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