vue axios nginx node expresss跨域

环境

1. vue-cli4
2. axios
3. 部署nginx
4. 后端express 跨域

express 跨域设置

1. 手动：

   //设置跨域访问
   app.use((req, res, next) => {
     res.header('Access-Control-Allow-Origin', '*')
     res.header('Access-Control-Allow-Headers', 'Authorization,X-API-KEY, Origin, X-Requested-With, Content-Type, Accept, Access-Control-Request-Method' )
     res.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PATCH, PUT, DELETE')
     res.header('Allow', 'GET, POST, PATCH, OPTIONS, PUT, DELETE')
     next();
   });

2. 安装cors

   npm install cors --save-dev
   
   const cors = require('cors');
   app.use(cors());