问对于浏览器的初始GET请求，Express和request路由是如何工作的？

EN

const express = require('express');
const app = express();

app.get('/*', (req, res, next) => {
  // Return React App index.html
});

app.listen(3000);

app.get('/api/v1/*', (req, res, next) {
  // Return some data in json format 
});

 // Ajax request from React app to: http://example.com/api

app.use('/api/*'),()=> {
   res.send({ <!-- some JSON object -->})
})

// User visits in browser: http://example.com/**/*     

app.use('/*',()=>{
   res.render(<!-- entire React App sent to browser -->)
})

1. Nginx, Apache, a 'cloud proxy' .etc direct the traffic to a static React bundle, which has no authentication and never makes contact with your Node server.
2. If the user has Authenticate previously they will have token in local storage (if you're using JWTs for Authentication) and your React app will be configured to always check for these tokens when you first it is initially loaded.
3. If the user has a token it will send an Ajax request in the background with the token as a Header Bearer and will send back user data, then redirect them to an 'Authenticated page' like the FB feed you mention.
4. If they don't have a token or the token Authentication fails then React will redirect them to the Login or Registration page

import React, { Component } from "react";
import axios from "axios";

class Home extends Component {
  constructor() {
    const accessToken = localStorage.getItem("accessToken");
    this.state = {
      accessToken,
      feeds: []
    };
  }

  componentDidMount() {
    if (this.state.accessToken) {
      axios(`api/feeds?accessToken=${this.state.accessToken}`).then(({ data }) => {
        this.setState({
          feeds: data
        });
      });
    }
  }

  render() {
    if (this.state.accessToken) {
      return <FeedsComponent feeds={this.state.feeds} />;
    }
    return <LoginComponent />;
  }
}

const express = require("express");

const app = express();

app.get('/api/feeds', (req, res, ) => {
    const feeds = [
        {},
        {}
    ]
    res.status(200).json(feeds);
});

app.listen(3001);