[TOC] ## 公共资源 ``` app.use(express.static(path.join(__dirname, 'public'))); ``` ## 跨域 ``` //设置允许跨域访问该服务. app.all('*', function (req, res, next) { res.header('Access-Control-Allow-Origin', '*'); //Access-Control-Allow-Headers ,可根据浏览器的F12查看,把对应的粘贴在这里就行 res.header('Access-Control-Allow-Headers', 'Content-Type'); res.header('Access-Control-Allow-Methods', '*'); res.header('Content-Type', 'application/json;charset=utf-8'); next(); }); ```