再项目搭建的app.js中添加如下代码
方法1、在app.js中手动配置
app.all('*', function (req, response, next) { //设置允许跨域的域名,*代表允许任意域名跨域 response.header("Access-Control-Allow-Origin", "*"); //允许的header类型 response.header("Access-Control-Allow-Headers", "X-Requested-With"); //跨域允许的请求方式 response.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS"); //设置响应头信息 response.header("X-Powered-By", ' 3.2.1') response.header("Content-Type", "application/json;charset=utf-8"); next(); });
方法2、使用cors,在app.js中
npm install cors --save-dev const cors = require('cors'); app.use(cors());