增加扩展机制定位文件；将common模块实现扩展模式；发布新版本；

app/common/controller/TimerController.php

@@ -2,37 +2,8 @@
 
 namespace app\common\controller;
 
-use think\facade\Cache;
+use base\common\controller\TimerControllerBase;
 
-class TimerController extends ToolsController
+class TimerController extends TimerControllerBase
 {
-
-    protected $frequency = null;
-
-    public function initialize()
-    {
-
-        parent::initialize();
-        
-        if (is_integer($this->frequency)) {
-            $this->protectVisit($this->frequency);
-        }
-    }
-
-    protected function protectVisit(int $frequency)
-    {
-
-        $cache_tag = 'timer_protect';
-
-        $cache_key = 'timer_protect_' . md5($this->request->url());
-
-        $last_exec_time = Cache::get($cache_key, 0);
-
-        if ($last_exec_time >= time() - $frequency) {
-
-            return $this->error('请不要频繁请求');
-        }
-
-        Cache::tag($cache_tag)->set($cache_key, time());
-    }
 }