创赢未来评分系统 - 初始化提交（移除大文件）

backend/community/utils.py

@@ -0,0 +1,55 @@
+from django.core.signing import TimestampSigner, BadSignature, SignatureExpired
+from shop.models import WeChatUser
+import logging
+
+logger = logging.getLogger(__name__)
+
+def get_current_wechat_user(request):
+    """
+    根据 Authorization 头获取当前微信用户
+    增强逻辑：如果 Token 解析出的 OpenID 对应的用户不存在（可能已被合并删除），
+    但该 OpenID 是 Web 虚拟 ID (web_phone)，尝试通过手机号查找现有的主账号。
+    """
+    auth_header = request.headers.get('Authorization')
+    if not auth_header or not auth_header.startswith('Bearer '):
+        logger.warning(f"Authentication failed: Missing or invalid Authorization header. Header: {auth_header}")
+        return None
+    token = auth_header.split(' ')[1]
+    signer = TimestampSigner()
+    try:
+        # 签名包含 openid
+        openid = signer.unsign(token, max_age=86400 * 30) # 30天有效
+        user = WeChatUser.objects.filter(openid=openid).first()
+        
+        if user:
+            return user
+            
+        # 如果没找到用户，检查是否是 Web 虚拟 OpenID
+        # 场景：Web 用户已被合并到小程序账号，旧 Web Token 依然有效，指向合并后的账号
+        logger.info(f"User not found for openid: {openid}, checking for merged account...")
+        if openid.startswith('web_'):
+            try:
+                # 格式: web_13800138000
+                parts = openid.split('_', 1)
+                if len(parts) == 2:
+                    phone = parts[1]
+                    # 尝试通过手机号查找（查找合并后的主账号）
+                    user = WeChatUser.objects.filter(phone_number=phone).first()
+                    if user:
+                        logger.info(f"Found merged user {user.id} for phone {phone}")
+                        return user
+            except Exception as e:
+                logger.error(f"Error checking merged account: {e}")
+                pass
+        
+        logger.warning(f"Authentication failed: User not found for openid {openid}")
+        return None
+    except SignatureExpired:
+        logger.warning("Authentication failed: Signature expired")
+        return None
+    except BadSignature:
+        logger.warning("Authentication failed: Bad signature")
+        return None
+    except Exception as e:
+        logger.error(f"Authentication unexpected error: {e}")
+        return None