server.js demo 文章已更新，请看下面更新之后的内容

使用官网上教程中的代码有点问题，自己参照实例改了下，修改了个express的ssr server。如果使用的话注意把其中dist改成你build之后的目录名。

require('regenerator-runtime/runtime');

const server = require('umi-server');

const express = require('express');

const compression = require('compression');

const helmet = require('helmet');

const { join, extname } = require('path');

const { createReadStream } = require('fs');

const isDev = process.env.NODE_ENV === 'development';

const root = join(__dirname, 'dist');

const render = server({

root,

polyfill: false,

dev: isDev,

});

const app = express();

app.use(compression());

app.use(helmet());

// app.use('.', express.static(root));

app.get('*', async (req, res, next) => {

const headerMap = {

'.js': 'text/javascript',

'.css': 'text/css',

'.jpg': 'image/jpeg',

'.png': 'image/jpeg',

}

const ext = extname(req.url);

const header = {

'Content-Type': headerMap[ext] || 'text/html'

}

if (!ext) {

const { ssrHtml } = await render({

req: {

url: req.originalUrl,

},

});

res.status(200).send(ssrHtml);

} else {

// static file url

const path = join(root, req.url);

res.sendFile(path);

}

});

if (!process.env.NOW_ZEIT_ENV) {

app.listen(8080);

console.log('http://localhost:8080');

}

module.exports = app;

需要安装包的package.json,里面乱七八糟，我也是新手，不敢随便删减...

{

"private": true,

"scripts": {

"build": "umi build",

"server": "npm run build && nodemon server.js",

"start": "cross-env NODE_ENV=development concurrently \"umi dev\" \"nodemon server.js\"",

"debug": "cross-env RM_TMPDIR=none COMPRESS=none UMI_ENV=prod umi build && node server.js"

},

"dependencies": {

"antd": "^3.19.5",

"axios": "^0.19.2",

"compression": "^1.7.4",

"cross-env": "^5.2.0",

"dva": "^2.6.0-beta.6",

"express": "^4.17.1",

"helmet": "^3.21.2",

"lodash": "^4.17.15",

"prettier": "^1.19.1",

"prop-types": "^15.7.2",

"react": "^16.8.6",

"react-axios": "^2.0.3",

"react-document-title": "^2.0.3",

"react-dom": "^16.8.6",

"regenerator-runtime": "^0.13.2",

"roadhog-api-doc": "^1.1.2",

"umi-request": "^1.2.4",

"umi-server": "^1.0.0"

},

"devDependencies": {

"@types/jest": "^23.3.12",

"@types/react": "^16.7.18",

"@types/react-dom": "^16.0.11",

"@types/react-test-renderer": "^16.0.3",

"babel-eslint": "^9.0.0",

"eslint": "^5.4.0",

"eslint-config-umi": "^1.4.0",

"eslint-plugin-flowtype": "^2.50.0",

"eslint-plugin-import": "^2.14.0",

"eslint-plugin-jsx-a11y": "^5.1.1",

"eslint-plugin-react": "^7.11.1",

"husky": "^0.14.3",

"lint-staged": "^7.2.2",

"react-test-renderer": "^16.7.0",

"umi": "^2.9.0",

"umi-plugin-react": "^1.8.0",

"umi-types": "^0.3.0"

},

"lint-staged": {

"*.{ts,tsx}": [

"eslint --fix",

"git add"

],

"*.{js,jsx}": [

"eslint --fix",

"git add"

]

},

"engines": {

"node": ">=8.0.0"

}

}

最后执行

node server.js

====================================

更新

上面的做法确实可以执行，但是存在一个很大的问题，就是生成的umi-server.js仍然依赖开发时用的各种包，经过再次查看官方文档，找到了原因。

ssr beta 2.8.0+

类型: Boolean | Object

默认值: false

用于服务端渲染(Server-Side Render)。

开启后，生成客户端静态文件的同时，也会生成 umi.server.js 和 ssr-client-mainifest.json 文件。

export default {

ssr: {

// https://github.com/liady/webpack-node-externals#optionswhitelist-

externalWhitelist?: [];

// webpack-node-externals 配置，排除 whiteList

nodeExternalsOpts?: {};

// 客户端资源 manifest 文件名，默认是 ssr-client-mainifest.json

manifestFileName: 'ssr-client-mainifest.json',

// 关闭 ssr external，全量打入 umi.server.js

disableExternal: false,

// 关闭 ssr external 时，白名单模块将进入 externa

// 可用于 react-helmet, react-document-title

disableExternalWhiteList?: string[] | object;

},

};

我之前直接将ssr配置为true，可以生成ssr的文件，但是默认的配置disableExternal: false，它并不会把依赖的js全部打包进去，查看之前build之后的umi-server.js里面仍然有各种require。

看完这个配置之后，我将.umirc.ts文件中的配置改为：

import { IConfig } from 'umi-types'; // ref: https://umijs.org/config/

const config: IConfig = {

ssr: {

disableExternal: true,

},

treeShaking: true,

targets: {

ie: 11,

},

....//此处省略了，自己配置routes，plugins

};

export default config;

然后重新打包 umi build生成的umi.server.js就不需要依赖其他的包了。

const server = require('umi-server');

const http = require('http');

const { createReadStream } = require('fs');

const { join, extname } = require('path');

const root = join(__dirname, 'dist');

const render = server({

root,

})

const headerMap = {

'.js': 'text/javascript',

'.css': 'text/css',

'.jpg': 'image/jpeg',

'.png': 'image/jpeg',

}

http.createServer(async (req, res) => {

const ext = extname(req.url);

const header = {

'Content-Type': headerMap[ext] || 'text/html'

}

res.writeHead(200, header);

if (!ext) {

// url render

const ctx = {

req,

res,

}

const { ssrHtml } = await render(ctx);

res.write(ssrHtml);

res.end()

} else {

// static file url

const path = join(root, req.url);

const stream = createReadStream(path);

stream.on('error', (error) => {

res.writeHead(404, 'Not Found');

res.end();

});

stream.pipe(res);

}

}).listen(3000)

console.log('http://localhost:3000');

可以运行了，不会报错。只需要package.json里面有umi-server，然后npm install:

"dependencies": {

"umi-server": "^1.0.0"

},

搞定，好开心，官方的文档真坑，一个disableExternal: false,和ssr:true把我坑惨了。