使用cors库
npm i cors // 安装
app.use(require('cors')()) // 使用
如下
app.all('*', function(req, res, next) {
//设为指定的域
res.header('Access-Control-Allow-Origin', "*");
res.header("Access-Control-Allow-Headers", "X-Requested-With");
res.header('Access-Control-Allow-Headers', 'Content-Type');
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
res.header('Access-Control-Allow-Credentials', true);
res.header("X-Powered-By", ' 3.2.1');
next();
});
如下
app.use((req,res,next)=>{
res.header('Access-Control-Allow-Origin', "*");
res.header('Access-Control-Allow-Headers', 'Content-Type');
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
next();
})
