diff --git a/conf/app.php b/conf/app.php
index 04fc1b3..b3112fb 100644
--- a/conf/app.php
+++ b/conf/app.php
@@ -26,7 +26,7 @@ return array(
     'error_layout' => 'error',              //exception layout, show error title and content
 
     //for debug, log directory: ../runtime/logs/
-    'debug' => false,
+    'debug' => true,
 
     //for themes
     /*
diff --git a/controller/ApiController.php b/controller/ApiController.php
new file mode 100644
index 0000000..4ab8b96
--- /dev/null
+++ b/controller/ApiController.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ * Api Controller
+ */
+require_once __DIR__ . '/../lib/DirScanner.php';
+
+Class ApiController extends Controller {
+    protected $version = '1.0';
+
+    //show api list
+    public function actionIndex() {
+        $params = array(
+            'version' => $this->version,
+            'list' => array(
+                '列表' => '/api/ls/',
+
+                //文件操作
+                '重命名' => '/api/rename/',
+                '删除文件' => '/api/delete/',
+                '移动' => '/api/move/',
+
+                //目录操作
+                '创建目录' => '/api/mkdir/',
+                '删除目录' => '/api/rmdir/',
+            ),
+        );
+        return $this->renderJson($params);
+    }
+
+    //目录、文件列表
+    public function actionLs() {
+        $code = 0;
+        $msg = $err = '';
+        $data = array();
+
+
+        $scanner = new DirScanner();
+        $scanner->setWebRoot(FSC::$app['config']['content_directory']);
+        $target = __DIR__ . '//../www/' . FSC::$app['config']['content_directory'];
+        $maxLevels = 2;
+        $dirTree = $scanner->scan($target, $maxLevels);
+        $scanResults = $scanner->getScanResults();
+
+        //获取目录
+        $menus = $scanner->getMenus();
+        if (empty($menus)) {
+            $err = '没有任何目录/文件';
+            return $this->renderJson(compact('code', 'msg', 'err', 'data'));
+        }
+
+        //排序
+        $menus_sorted = array();    //Readme_sort.txt 说明文件内容，一级目录菜单从上到下的排序
+        $readmeFile = $scanner->getDefaultReadme();
+        if (!empty($readmeFile)) {
+            if (!empty($readmeFile['sort'])) {
+                $menus_sorted = explode("\n", $readmeFile['sort']);
+            }
+        }
+
+        $sortedTree = $this->sortMenusAndDirTree($menus_sorted, $menus, $dirTree);
+        if (!empty($sortedTree)) {
+            $menus = $sortedTree['menus'];
+            $dirTree = $sortedTree['dirTree'];
+        }
+
+
+        $cateId = $this->get('id', $menus[0]['id']);
+        $data['menus'] = $menus;
+        $data['dirTree'] = $scanResults[$cateId];
+
+        $code = 1;
+        $msg = '';
+        $err = '';
+
+        return $this->renderJson(compact('code', 'msg', 'err', 'data'));
+    }
+
+}
diff --git a/controller/Controller.php b/controller/Controller.php
index f609098..2008895 100644
--- a/controller/Controller.php
+++ b/controller/Controller.php
@@ -80,6 +80,11 @@ Class Controller {
 
     //render json data
     protected function renderJson($data) {  
+        if (!empty(FSC::$app['config']['debug'])) {
+            $end_time = microtime(true);
+            $data['page_time_cost'] = ceil( ($end_time - FSC::$app['start_time']) * 1000 );   //ms
+        }
+
         header("Content-Type: application/json; charset=utf-8");
         echo json_encode($data);
         exit;