React scaffolding configuration proxy

React scaffolding configuration proxy summary

method one

Add the following configuration to package.json

"proxy":"http://localhost:5000"

illustrate:

1. Advantages: Simple configuration, no prefix can be added when the front end requests resources.
2. Cons: Cannot configure multiple proxies.
3. Working method: Configure the proxy in the above way. When a resource that does not exist in 3000 is requested, the request will be forwarded to 5000 (matching front-end resources first)

Method Two

1. Step 1: Create a Proxy Configuration File

   在src下创建配置文件：src/setupProxy.js
   

2. Write setupProxy.js to configure specific proxy rules:

   const proxy = require('http-proxy-middleware')
   
   module.exports = function(app) {
         
         
     app.use(
       proxy('/api1', {
         
           //api1是需要转发的请求(所有带有/api1前缀的请求都会转发给5000)
         target: 'http://localhost:5000', //配置转发目标地址(能返回数据的服务器地址)
         changeOrigin: true, //控制服务器接收到的请求头中host字段的值
         /*
         	changeOrigin设置为true时，服务器收到的请求头中的host为：localhost:5000
         	changeOrigin设置为false时，服务器收到的请求头中的host为：localhost:3000
         	changeOrigin默认值为false，但我们一般将changeOrigin值设为true
         */
         pathRewrite: {
         
         '^/api1': ''} //去除请求前缀，保证交给后台服务器的是正常请求地址(必须配置)
       }),
       proxy('/api2', {
         
          
         target: 'http://localhost:5001',
         changeOrigin: true,
         pathRewrite: {
         
         '^/api2': ''}
       })
     )
   }
   

illustrate:

1. Advantages: Multiple proxies can be configured, and it is possible to flexibly control whether requests go through proxies.
2. Disadvantages: The configuration is cumbersome, and the front end must add a prefix when requesting resources.