Function getValue

Script/Parser.js:200–206

(fn, defaultVaule)

//避免json undefined错误的 函数
const getValue = (fn, defaultVaule) => {
  try {
    return fn();
  } catch (error) {
    return defaultVaule;
  }
};

var type0=""
//flag=1,2,3分别为 server、rewrite、rule 类型