在完成之后，路由不起作用

Question

所以我创建了一个路由，如下所示，

​

import React from "react";
import ReactDOM from "react-dom";
import MainComponent from "./components/mainComponent";
import LoaderComponent from "./components/loaderComponent";
import * as serviceWorker from "./serviceWorker";
import { Route, BrowserRouter as Router } from "react-router-dom";

ReactDOM.render(
  <Router>
    <div>
      <Route exact path="/home" component={MainComponent} />
      <Route exact path="/loader" component={LoaderComponent} />
      <Route exact path="/" component={MainComponent} />
    </div>
  </Router>,
  document.getElementById("root")
);

serviceWorker.unregister();

​

当应用程序启动时，路由工作非常好。

npm运行启动

当我点击localhost:3000/home时，它会呈现MainComponent.但是在构建之后，它说不能获得/home

npm运行构建

当通过nodeJs检查应用程序(生成后)时，只有默认的routing ()有效。其余路由引发无法在浏览器中获取错误。

附在nodejs server.js文件下面

​

const express = require("express");
const bodyParser = require("body-parser");
const path = require("path");
const dotenv = require("dotenv");

dotenv.config();

require("./db/db_connection");
require("./scheduler");

const app = express();

//This is to make sure request body is accessible in express
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

//Router for the api end points
const leaderboardRoutes = require("./routes");
app.use("/api/v1", leaderboardRoutes);

//Views are present inside build folder
app.use(express.static(path.join(__dirname, "build")));

//Application hosted port
const port = process.env.PORT || 3000;

app.listen(port, function () {
  console.log(`Application running on port ${port}`);
});

​

我还附加了package.json文件以供参考，

​

{
  "name": "test-app",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.5.0",
    "@testing-library/user-event": "^7.2.1",
    "axios": "^0.19.2",
    "body-parser": "^1.19.0",
    "bootstrap": "^4.4.1",
    "connect-timeout": "^1.9.0",
    "dotenv": "^8.2.0",
    "express": "^4.17.1",
    "http": "0.0.1-security",
    "material-ui": "^0.20.2",
    "mongoose": "^5.9.9",
    "node-schedule": "^1.3.2",
    "path": "^0.12.7",
    "pure-react-carousel": "^1.25.2",
    "react": "^16.13.0",
    "react-bootstrap": "^1.0.0-beta.17",
    "react-circular-progressbar": "^2.0.3",
    "react-dom": "^16.13.0",
    "react-router-dom": "^5.2.0",
    "react-scripts": "3.4.0",
    "request": "^2.88.2"
  },
  "scripts": {
    "start": "react-scripts start",
    "start-server": "npm run build && nodemon server.js",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

​

请帮助我理解哪里出了问题或者我错过了什么。提前谢谢。

Answer 1

我没有使用react-scripts，但是在构建之后，如果它显示Cannot GET /*，那么在我看来，这些文件进入了build目录下的某个目录，这意味着您要访问的路径不完整。您可能需要检查这一点，并在构建配置中使用。

例如，在我的例子中，我为我的应用程序使用了一个挂载路径，因此它看起来如下：

http://localhost:3000/myapp，其中myapp是挂载路径。

然后我使用public名称作为webpack配置path中的一个目录，因为我想把我的文件放在那里，然后我使用publicPath和值myapp，这意味着文件要进入build/public/myapp，所以当我点击上面的URL时，服务器在这个路径中查找index文件并加载文件。