在React.js、node.js、webpack、babel、express中使用fs模块

我有一个需求，我在其中呈现视图，我在其中显示一个表单。提交表单时，我需要收集表单数据并创建一个文件，并将表单数据保存为该文件中的JSON。我正在使用React.js, node.js, babel和webpack。

经过一番努力，我发现我必须使用同构或通用javascript，即在服务器端使用react和渲染，因为我们不能在客户端使用fs模块。

我运行它:npm run start

之后，我可以在控制台中看到[Object Object]从下面react组件(主页.js)的第1行打印到控制台中。但后来当我访问这个页面时，它给出了一个错误:

'bundle.js:18 Uncaught Error: Cannot find module "fs"'

下面是代码片段:

webpack.config.js

"use strict";
const debug = process.env.NODE_ENV !== "production";
const webpack = require('webpack');
const path = require('path');
module.exports = {
  devtool: debug ? 'inline-sourcemap' : null,
  entry: path.join(__dirname, 'src', 'app-client.js'),
  devServer: {
    inline: true,
    port: 3333,
    contentBase: "src/static/",
    historyApiFallback: true
  },
  output: {
    path: path.join(__dirname, 'src', 'static', 'js'),
    publicPath: "/js/",
    filename: 'bundle.js'
  },
  module: {
    loaders: [{
      test: path.join(__dirname, 'src'),
      loader: ['babel-loader'],
      query: {
        //cacheDirectory: 'babel_cache',
        presets: debug ? ['react', 'es2015', 'react-hmre'] : ['react', 'es2015']
      }
    }]
  },
  plugins: debug ? [] : [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV)
    }),
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.optimize.UglifyJsPlugin({
      compress: { warnings: false },
      mangle: true,
      sourcemap: false,
      beautify: false,
      dead_code: true
    }),
  ]
};

package.json

{
  "name": "sample",
  "version": "1.0.0",
  "description": "Simple application to showcase how to achieve universal rendering and routing with React and Express.",
  "main": "src/server.js",
  "scripts": {
    "start": "SET NODE_ENV=production&&babel-node src/server.js",
    "start-dev": "npm run start-dev-hmr",
    "start-dev-single-page": "node_modules/.bin/http-server src/static",
    "start-dev-hmr": "webpack-dev-server --progress --inline --hot",
    "build": "SET NODE_ENV=production&&webpack -p"
  },
  "dependencies": {
    "babel-cli": "^6.11.4",
    "babel-core": "^6.13.2",
    "babel-loader": "^6.2.5",
    "babel-plugin-react-html-attrs": "^2.0.0",
    "babel-preset-es2015": "^6.13.2",
    "babel-preset-react": "^6.11.1",
    "babel-preset-react-hmre": "^1.1.1",
    "ejs": "^2.5.1",
    "express": "^4.14.0",
    "react": "^15.3.1",
    "react-dom": "^15.3.1",
    "react-router": "^2.6.1"
  },
  "devDependencies": {
    "http-server": "^0.9.0",
    "react-hot-loader": "^1.3.0",
    "webpack": "^1.13.2",
    "webpack-dev-server": "^1.14.1"
  }
}

server.js

use strict';
import path from 'path';
import { Server } from 'http';
import Express from 'express';
import React from 'react';
import { renderToString } from 'react-dom/server';
import { match, RouterContext } from 'react-router';
import routes from './routes';
import NotFoundPage from './components/NotFoundPage';
//import fs from 'fs';
//console.log("server" + fs);
// initialize the server and configure support for ejs templates
const app = new Express();
const server = new Server(app);
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));
// define the folder that will be used for static assets
app.use(Express.static(path.join(__dirname, 'static')));
// universal routing and rendering
app.get('*', (req, res) => {
  match(
    { routes, location: req.url },
    (err, redirectLocation, renderProps) => {
//console.log("renderProps "+ Object.values(routes));
//console.log("req.url "+ req.url);
      // in case of error display the error message
      if (err) {
        return res.status(500).send(err.message);
      }
      // in case of redirect propagate the redirect to the browser
      if (redirectLocation) {
        return res.redirect(302, redirectLocation.pathname + redirectLocation.search);
      }
      // generate the React markup for the current route
      let markup;
      if (renderProps) {
        // if the current route matched we have renderProps
        markup = renderToString(<RouterContext {...renderProps}/>);
      } else {
        // otherwise we can render a 404 page
        markup = renderToString(<NotFoundPage/>);
        res.status(404);
      }
      // render the index template with the embedded React markup
      return res.render('index', { markup });
    }
  );
});
// start the server
const port = process.env.PORT || 3000;
const env = process.env.NODE_ENV || 'production';
console.log(`Server starting on http://localhost:${port} [${env}]`)
server.listen(port, err => {
  if (err) {
    return console.error(err);
  }
  console.info(`Server running on http://localhost:${port} [${env}]`);
});

home .js (React component)

import React from 'react';
import fs from 'fs';  
import dateformat from 'dateformat';
console.log("home page" + fs);  -- Line 1
class HomePage extends React.Component{
 checkDirectory(directory, callback) {
    fs.stat(directory, function(err, stats) {
      //Check if error defined and the error code is "not exists"
      if (err && err.errno === 34) {
        //Create the directory, call the callback.
        fs.mkdir(directory, callback);
      } else {
        //just in case there was a different error:
        callback(err)
      }
    });
  }
 handleClick(){
    var obj = JSON.stringify($('#statusForm').serializeArray());
    
    this.checkDirectory("directory/"+currentDate, function(error) {
      if(error) {
        console.log("oh no!!!", error);
      } else {
        //Carry on, all good, directory exists / created.
        fs.writeFile("directory/"+currentDate+name+".json", obj, function(err) {
        if(err) {
            return console.log(err);
        }
        console.log("The file was saved!");
        });
        console.log("exists");
      }
    });*/
  }
  render() {
    return (
      <div className="container">
    <form id="statusForm" className="form-horizontal" >
      <div className="form-group">
        <label className="control-label col-sm-2" for="names">Select list:</label>
        <div className="col-sm-10">
          <select name="names" className="form-control" id="names">
            <option>Select</option>
            <option>abc</option>
            <option>xyz</option>
          </select>
        </div>
      </div>
      <div className="form-group">
        <label className="control-label col-sm-2" for="team">Select list:</label>
        <div className="col-sm-10">
          <select name="team" className="form-control" id="team">
            <option>Select</option>
            <option>team 1</option>
            <option>team 2</option>
          </select>
        </div>
      </div>
      <div className="form-group">
        <label className="control-label col-sm-2" for="pwd">Password:</label>
        <div className="col-sm-10">
          <input type="textarea" className="form-control" id="todayTask" name="todayTask" placeholder="Enter Task"/>
        </div>
      </div>
      <div className="form-group">
        <div className="col-sm-offset-2 col-sm-10">
          <button type="button" className="btn btn-default" onClick={this.handleClick.bind(this)}>Submit</button>
        </div>
      </div>
    </form>
  </div>
    );
  }
}
export default HomePage;

编辑1:

我调查了更多，发现如果我不使用npm run build明确地构建我的应用程序，只是更新我的react组件，我不会得到上面的错误。此外，在此之后，如果我将文件创建逻辑直接放入渲染方法中，并在刷新页面时成功创建文件。所以观察是它不工作的Onclick按钮，可以工作，如果我们刷新页面。这就是为什么它是这样工作的

编辑2:

通过在我的webpack配置中使用target:'node'来解决页面刷新问题，但我确实得到了错误:

Uncaught ReferenceError: require is not defined

在浏览器。因此，直接在render方法中的文件创建逻辑将在我们访问页面时创建文件。不需要刷新

谁能指导我什么是最好的方式来实现我想要的要求?