使用 webpack 和 react-router 进行延迟加载和代码拆分不加载

我正在努力将我的react v0.14 + redux v3.0 + react-router v1.0代码库从客户端渲染移动到服务器端渲染，使用 webpack v1.12 捆绑和代码拆分为块以按需加载路由和组件。

我遵循并基于 https://github.com/rackt/example-react-router-server-rendering-lazy-routes 的设置，因为我认为它提供了简单性和出色的实用程序。昨天一整天我一直在努力迁移到服务器端渲染，但我遇到了一些我无法解决的问题，我不完全确定它们是否是因为webpack设置不正确，如果我在服务器/客户端或路由配置上做错了react-router，或者，如果我在设置导致这些问题的redux时做错了什么。

我遇到了以下问题：

我能够加载初始页面并且一切正常，但没有其他路由加载并给我 GET http://localhost:3000/profile 404（未找到）
索引/主页 javascript 可以工作，但所有资产（css）都呈现为text/javascript因此样式不会显示，除非它们是内联的。

webpack.config.js

var fs = require('fs')
var path = require('path')
var webpack = require('webpack')
module.exports = {
  devtool: 'source-map',
  entry: './client/client.jsx',
  output: {
    path: __dirname + '/__build__',
    filename: '[name].js',
    chunkFilename: '[id].chunk.js',
    publicPath: '/__build__/'
  },
  module: {
    loaders: [
      {
        test: /.jsx?$/,
        exclude: /(node_modules|bower_components)/,
        loader: 'babel-loader'
      }
    ]
  },
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.UglifyJsPlugin({
      compressor: { warnings: false },
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV || 'development')
    })
  ]
}

服务器.js

import http from 'http';
import React from 'react';
import {renderToString} from 'react-dom/server';
import { match, RoutingContext } from 'react-router';
import {Provider} from 'react-redux';
import configureStore from './../common/store/store.js';
import fs from 'fs';
import { createPage, write, writeError, writeNotFound, redirect } from './server-utils.js';
import routes from './../common/routes/rootRoutes.js';
const PORT = process.env.PORT || 3000;
var store = configureStore();
const initialState = store.getState();
function renderApp(props, res) {
  var markup = renderToString(
    <Provider store={store}>
      <RoutingContext {...props}/>
    </Provider>
  );
  var html = createPage(markup, initialState);
  write(html, 'text/html', res);
}
http.createServer((req, res) => {
  if (req.url === '/favicon.ico') {
    write('haha', 'text/plain', res);
  }
  // serve JavaScript assets
  else if (/__build__/.test(req.url)) {
    fs.readFile(`.${req.url}`, (err, data) => {
      write(data, 'text/javascript', res);
    })
  }
  // handle all other urls with React Router
  else {
    match({ routes, location: req.url }, (error, redirectLocation, renderProps) => {
      if (error)
        writeError('ERROR!', res);
      else if (redirectLocation)
        redirect(redirectLocation, res);
      else if (renderProps)
        renderApp(renderProps, res);
      else
        writeNotFound(res);
    });
  }
}).listen(PORT)
console.log(`listening on port ${PORT}`)

服务器实用程序

与我在上面发布的存储库相同example-react-router-server-rendering-lazy-routes只需导航到存储库中的/modules/utils/server-utils.js即可。唯一的区别是createPage函数：

export function createPage(html, initialState) {
  return( `
  <!doctype html>
  <html>
    <head>
      <meta charset="utf-8"/>
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <link rel="stylesheet" href="./../bower_components/Ionicons/css/ionicons.min.css">
      <link rel="stylesheet" href="./../dist/main.css">
      <title>Sell Your Soles</title>
    </head>
    <body>
      <div id="app">${html}</div>
      <script>window.__INITIAL_STATE__ = ${JSON.stringify(initialState)};</script>
      <script src="/__build__/main.js"></script>
    </body>
  </html>
  `);
}

根路由.js

// polyfill webpack require.ensure
if (typeof require.ensure !== 'function') require.ensure = (d, c) => c(require)
import App from '../components/App.jsx'
import Landing from '../components/Landing/Landing.jsx'
export default {
  path: '/',
  component: App,
  getChildRoutes(location, cb) {
    require.ensure([], (require) => {
      cb(null, [
        require('./UserProfile/UserProfileRoute.js'),
        require('./UserHome/UserHomeRoute.js'),
        require('./SneakerPage/SneakerPageRoute.js'),
        require('./Reviews/ReviewsRoute.js'),
        require('./Listings/ListingsRoute.js'),
        require('./Events/EventsRoute.js')
      ])
    })
  },
  indexRoute: {
    component: Landing
  }
}

用户配置文件路由.js

import UserProfile from '../../components/UserProfile/UserProfile.jsx';
export default {
  path: 'profile',
  component: UserProfile
}

客户端.js

import React from 'react';
import { match, Router } from 'react-router';
import { render } from 'react-dom';
import { createHistory } from 'history';
import routes from './../common/routes/rootRoutes.js';
import {Provider} from 'react-redux';
import configureStore from './../common/store/store.js';

const { pathname, search, hash } = window.location;
const location = `${pathname}${search}${hash}`;
const initialState = window.__INITIAL_STATE__;
const store = configureStore(initialState);

// calling `match` is simply for side effects of
// loading route/component code for the initial location
match({ routes, location }, () => {
  render(
    <Provider store={store}>
      <Router routes={routes} history={createHistory()} />
    </Provider>,
    document.getElementById('app')
  );
});

我在不和谐方面帮助你，但我想我也会在这里发布答案。

如果您使用的是 babel6（而不是 babel5）并在组件中使用 export default，则需要将路由更新为以下内容：

getChildRoutes(location, cb) {
    require.ensure([], (require) => {
        cb(null, [
            require('./UserProfile/UserProfileRoute.js').default,
            require('./UserHome/UserHomeRoute.js').default,
            require('./SneakerPage/SneakerPageRoute.js').default,
            require('./Reviews/ReviewsRoute.js').default,
            require('./Listings/ListingsRoute.js').default,
            require('./Events/EventsRoute.js').default
        ])
    })
}

有关更多详细信息，请参阅此 SO 讨论：Babel 6 更改了导出默认值的方式

如果你碰巧升级到 Webpack 2 （+摇树），你会使用 System.import 而不是 requires，这非常有用。

方法如下：

import App from 'containers/App';
function errorLoading(err) {
  console.error('Dynamic page loading failed', err);
}
function loadRoute(cb) {
  return (module) => cb(null, module.default);
}
export default {
  component: App,
  childRoutes: [
    {
      path: '/',
      getComponent(location, cb) {
        System.import('pages/Home')
          .then(loadRoute(cb))
          .catch(errorLoading);
      }
    },
    {
      path: 'blog',
      getComponent(location, cb) {
        System.import('pages/Blog')
          .then(loadRoute(cb))
          .catch(errorLoading);
      }
    }
  ]
};

您可以在这篇博文中获得完整的指南：React 路由器的自动代码拆分

webpack.config.js

服务器.js

服务器实用程序

根路由.js

用户配置文件路由.js

客户端.js

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