CORS in Express

跨域问题

1. 安装cors

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

2. Handle

   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()
   })