/**
  * 上传图片
  */
 public function upload()
 {
     // 	    printJson('http://pic.baidu.com/upload/web/images/201603/56f9e14d508141496.jpg');
     $file = $_FILES['file'];
     if (empty($file)) {
         printJson(null, 1, "未上传文件.请重试");
     }
     $suffix = pathinfo($file['name'], PATHINFO_EXTENSION);
     $suffix = strtolower($suffix);
     if (!in_array($suffix, array('jpg', 'png', 'bmp', 'gif', 'jpeg'))) {
         printJson(null, 1, "上传文件格式不被支持");
     }
     $file = file_get_contents($file['tmp_name']);
     $url = "http://pic.baidu.com/task/task.php?opt=uploadPic";
     $res = RequestClient::http($url, null, array('block' => 'actbao', 'pic' => base64_encode($file)));
     Logger::debug("上传comment结果返回" . $res, RequestClient::getError());
     if (empty($res) || $res == '500') {
         printJson(null, 1, "上传失败,请重试");
     }
     $res = json_decode($res, true);
     if (!isset($res['url'])) {
         printJson(null, 1, "上传失败.请重试");
     }
     printJson($res['url']);
 }