在本地主机上运行我的应用程序时，访问我手动输入的URL或刷新页面没有问题，但是在使用heroku部署应用程序后，我只能通过浏览主页来访问页面。在阅读了有关此处（React-router urls don't work when refreshing or writing manually）的一些帖子之后，我决定尝试应用“全面”解决方案。我已经在'server.js'文件中实现了/ *函数，但是该网页加载了空白的index.html页面，而不是正确的react组件，因此无法弄清原因。相关页面的代码如下：
Api.js `
const request = require('request');
const express = require('express');
const app = express();
const router = express.Router();
var varViews = 0;
const {createServer} = require('http');
const path = require('path');
const PORT = process.env.PORT || 3000
const dev = app.get('env') !== 'production'
if(!dev){
console.log("Not Dev mode");
app.use(express.static(path.resolve(__dirname, 'build')));
app.use(express.static(__dirname + '/public'));
app.get("/", (req, res) => {
console.log('Home page');
res.send("This is the home page");
})
app.post("/usbstat", (req, res) => {
varViews++;
var views = {views: varViews};
res.json(views);
})
app.delete("/usbstat", (req, res) => {
varViews = 0;
var views = {views: 0};
res.json(views);
})
app.get("/usbstat", (req, res) => {
var numViews = {views: varViews};
return res.json(numViews);
})
app.get('/*', function(req, res) {
res.sendFile(path.join(__dirname, '/public/index.html'), function(err) {
if (err) {
res.status(500).send(err)
}
})
})
}
app.listen(PORT, () => {
console.log('App is listening on'+PORT);
})
module.exports = app;
index.js
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import * as serviceWorker from './serviceWorker';
ReactDOM.render(<App />, document.getElementById('root'));
serviceWorker.unregister();
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
<meta
name="viewport"
content="width=device-width, initial-scale=1, shrink-to-fit=no"
/>
<meta name="theme-color" content="#000000" />
<!--
manifest.json provides metadata used when your web app is installed on a
user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
-->
<!-- <link rel="manifest" href="%PUBLIC_URL%/manifest.json" /> -->
<!--
Notice the use of %PUBLIC_URL% in the tags above.
It will be replaced with the URL of the `public` folder during the build.
Only files inside the `public` folder can be referenced from the HTML.
Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
work correctly both with client-side routing and a non-root public URL.
Learn how to configure a non-root public URL by running `npm run build`.
-->
<title>Nova Cyber Security Test</title>
</head>
<body>
<noscript>You need to enable JavaScript to run this app.</noscript>
<div id="root"></div>
<!--
This HTML file is a template.
If you open it directly in the browser, you will see an empty page.
You can add webfonts, meta tags, or analytics to this file.
The build step will place the bundled scripts into the <body> tag.
To begin the development, run `npm start` or `yarn start`.
To create a production bundle, use `npm run build` or `yarn build`.
-->
<script src="../src/index.js"></script>
</body>
</html>
app.js
import React, { Component } from 'react';
import { Router, Route, Switch } from 'react-router-dom';
import history from './history';
import Home from './pages/home/Home';
import USBDrive from './pages/usbdrive/USBDrive';
import phishingStats from './pages/phishingStats/phishingStats';
import Admin from './pages/admin/Admin';
class App extends Component {
render() {
return (
<Router history={history}>
<Switch>
<Route exact path='/' component={Home}/>
<Route exact path='/USBStats' component={USBDrive}/>
<Route exact path='/phishingStats' component={phishingStats}/>
<Route exact path='/admin' component={Admin}/>
</Switch>
</Router>
);
}
}
export default App;