From abd8eabf9b566adcb57dd59694001c89b200ad02 Mon Sep 17 00:00:00 2001
From: marco <marco@wonderable.ai>
Date: Thu, 28 May 2026 15:54:51 +0800
Subject: [PATCH] =?UTF-8?q?feat(meituan):=20=E6=9C=AA=E9=85=8D=E7=BD=AE=20?=
 =?UTF-8?q?MT=5FCPS=5FAPP=5FKEY=20=E6=97=B6=E6=8E=A5=E5=8F=A3=E9=99=8D?=
 =?UTF-8?q?=E7=BA=A7=E8=BF=94=E7=A9=BA,=E4=B8=8D=E5=86=8D=20502?=
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之前未配美团 CPS 凭证时,/coupons 和 /referral-link 调用会抛 MeituanCpsError
被翻成 502,前端首页一进就拉 /feed → 看到错误(虽然 /feed 因 _fetch_topic
吞异常已经返空)。新开发机没填美团 key 时体验差。

本次让美团 3 个接口都在入口处早返空响应:
- Settings 新增 mt_cps_configured property(同 wxpay_configured 套路)
- /coupons / /feed / /referral-link 未配置时分别返空 list / 空 link
- 客户端首页 feed 看到空列表,其他业务(登录/领券/广告/提现)完全不受影响

副作用:/feed 返空现在同时表示"配置缺失"和"美团真无券"两种状态,排查时
看 settings.mt_cps_configured 区分。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 app/api/v1/meituan.py | 7 +++++++
 app/core/config.py    | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/app/api/v1/meituan.py b/app/api/v1/meituan.py
index 4d56b73..7e3e2bc 100644
--- a/app/api/v1/meituan.py
+++ b/app/api/v1/meituan.py
@@ -9,6 +9,7 @@ from concurrent.futures import ThreadPoolExecutor, as_completed
 
 from fastapi import APIRouter, HTTPException
 
+from app.core.config import settings
 from app.integrations.meituan import MeituanCpsError, get_referral_link, query_coupon
 from app.schemas.meituan import (
     CouponCard,
@@ -27,6 +28,8 @@ router = APIRouter(prefix="/api/v1/meituan", tags=["meituan-cps"])
 
 @router.post("/coupons", response_model=CouponListResponse, summary="券列表(为您推荐)")
 def list_coupons(req: CouponListRequest) -> CouponListResponse:
+    if not settings.mt_cps_configured:
+        return CouponListResponse(items=[], has_next=False, search_id=None)
     logger.info("[coupons] lon=%.6f lat=%.6f topic=%s", req.longitude, req.latitude, req.list_topic_id)
     try:
         raw = query_coupon(
@@ -78,6 +81,8 @@ def _interleave(waimai: list[dict], daodian: list[dict]) -> list[CouponCard]:
 
 @router.post("/feed", response_model=FeedResponse, summary="混合feed(外卖+到店交叉, 无限流)")
 def feed(req: FeedRequest) -> FeedResponse:
+    if not settings.mt_cps_configured:
+        return FeedResponse(items=[], has_next=False, page=req.page)
     page_idx = req.page - 1
     lon, lat = req.longitude, req.latitude
     logger.info("[feed] page=%s lon=%.6f lat=%.6f", req.page, lon, lat)
@@ -108,6 +113,8 @@ def feed(req: FeedRequest) -> FeedResponse:
 
 @router.post("/referral-link", response_model=ReferralLinkResponse, summary="换取推广链接(点抢时调)")
 def referral_link(req: ReferralLinkRequest) -> ReferralLinkResponse:
+    if not settings.mt_cps_configured:
+        return ReferralLinkResponse(link="", link_map={})
     try:
         raw = get_referral_link(
             product_view_sign=req.product_view_sign,
diff --git a/app/core/config.py b/app/core/config.py
index 24b049e..59d2b96 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -53,11 +53,18 @@ class Settings(BaseSettings):
     SMS_SEND_INTERVAL_SEC: int = 60
 
     # ===== 美团联盟 CPS =====
+    # 未配置时所有 /api/v1/meituan/* 接口 200 返空(优雅降级),不影响登录/领券等其他业务。
     MT_CPS_APP_KEY: str = ""
     MT_CPS_APP_SECRET: str = ""
     MT_CPS_HOST: str = "https://media.meituan.com"
     MT_CPS_TIMEOUT_SEC: int = 15
     MT_CPS_DEFAULT_SID: str = "sgbjia"
+
+    @property
+    def mt_cps_configured(self) -> bool:
+        """美团 CPS 凭证齐全(缺则接口返空,而非 502)。"""
+        return bool(self.MT_CPS_APP_KEY and self.MT_CPS_APP_SECRET)
+
     # ===== 微信支付(商家转账到零钱 / 提现)=====
     # 真实凭证放 .env(已 gitignore),证书 .pem 放 secrets/。WECHAT_APP_ID 同时用于
     # 微信登录(code 换 openid)与转账,必须与 App 端开放平台 appid 一致。