恢复接口：exists_token，AppBackend在用

src/main/java/cn/quantgroup/xyqb/controller/internal/user/UserController.java

@@ -354,6 +354,30 @@ public class UserController implements IBaseController {
     return JsonResult.buildSuccessResult(null, null);
   }
 
+
+
+  /**
+   * 检查token是否已经过期不存在了
+   *
+   * @param token - sid,session的id
+   * @return
+   */
+  @LogHttpCaller
+  @RequestMapping("/exists_token")
+  public JsonResult checkToken(@RequestParam String token) {
+    if(StringUtils.isEmpty(token)){
+      return JsonResult.buildSuccessResult(null,false);
+    }
+    if(token.contains("*")){
+      return JsonResult.buildSuccessResult(null,false);
+    }
+    String tokenKey = Constants.SESSION_PREFIX + token;
+    String tokenKey2 = Constants.Session.USER_SESSION_CACHE + token;
+    // 判断token是否存在
+    boolean exist = stringRedisTemplate.hasKey(tokenKey)||stringRedisTemplate.hasKey(tokenKey2);
+    return JsonResult.buildSuccessResult("token valid", exist);
+  }
+
   @RequestMapping("/syncUserInfo")
   public JsonResult syncUserInfo(HttpServletRequest request) {
     log.error("[监控][UserController][syncUserInfo] request-Header:{}", JSON.toJSONString(getRequestHeaderMap(request)));