设置代理。在使用http代理中间件的reactjs应用程序中无法识别js路径

Question

我在我的反应应用程序中实现超文本传输协议代理中间件，我的设置roxy.js路径不识别。下面是我的代码，如果我做错了什么，请让我知道。

应用组件

class App extends React.Component {
  test = () => {
// I dont have any thing which is running in "/api"  
// Simply called fetch with "/api" because setupPorxy.js  is looking my request or not 
    fetch("/api")
      .then(res => {
        alert('test pri')
        console.log('res', res)
      })
  }
  render() {
    return (
      <div className="App">
        <button onClick={this.test}>Test</button>
      </div>
    );
  }
}

setupProxy.js

const { createProxyMiddleware } = require('http-proxy-middleware');

\\ I dont have any thing running on localhost 5000 , want to check the request is modified or not 

module.exports = (app) => {
    app.use(createProxyMiddleware('/api', { target: 'http://localhost:5000', changeOrigin: true }));
}

输出

But ended with 404 not found in browser console like http://localhost:3000/api (404 not found)

Answer 1

通过您的代码，我可以看到您使用了CreateReact应用程序。你还没有展示你的包裹。json。你添加代理了吗？我想你可能错过了。

package.json

{
   ....
   "proxy": "http://localhost:5000",
 }