umijs ssr 代码

const http = require('http');
const { createReadStream } = require('fs');
const { join, extname } = require('path');
const { Stream } = require('stream');

const root = join(__dirname, './dist');
const render = require('./dist/umi.server');
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) {
      const context = {};
      const { html, error, rootContainer } = await render({
        // 有需要可带上 query
        path: req.url,
        context,
        // 可自定义 html 模板
        // htmlTemplate: defaultHtml,
        // 启用流式渲染
        mode: "stream",
        // html 片段静态标记（适用于静态站点生成）
        // staticMarkup: false,
        // 扩展 getInitialProps 在服务端渲染中的参数
        // getInitialPropsCtx: {},
        // manifest，正常情况下不需要
      });
      if (html instanceof Stream) {
        html.pipe(res);
        html.on('end', function() {
          res.end();
        });
      } else {
        res.write(html);
        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');