微服务改造

src/main/java/com/aida/seller/common/interceptor/UserContextInterceptor.java

@@ -0,0 +1,48 @@
+package com.aida.seller.common.interceptor;
+
+import com.aida.seller.common.context.UserContext;
+import com.aida.seller.model.vo.AuthPrincipalVo;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+/**
+ * 从 Gateway 转发的请求头中读取已鉴权的用户身份，写入 UserContext。
+ * <p>
+ * Gateway 验证 JWT 后将 X-User-Id 和 X-User-Info 写入请求头，
+ * 此拦截器负责将信息填充到 ThreadLocal，供业务代码使用。
+ */
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class UserContextInterceptor implements HandlerInterceptor {
+
+    private static final String USER_ID_HEADER = "X-User-Id";
+    private static final String USER_INFO_HEADER = "X-User-Info";
+
+    private final ObjectMapper objectMapper;
+
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
+        String userInfoJson = request.getHeader(USER_INFO_HEADER);
+        if (userInfoJson != null && !userInfoJson.isBlank()) {
+            try {
+                AuthPrincipalVo principal = objectMapper.readValue(userInfoJson, AuthPrincipalVo.class);
+                UserContext.setUserHolder(principal);
+            } catch (Exception e) {
+                log.warn("Failed to parse X-User-Info header: {}", e.getMessage());
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
+                                Object handler, Exception ex) {
+        UserContext.delete();
+    }
+}