Http Gzipped Chunked Example

gzipped-chunked-server.ts

import http from 'http';
import zlib from 'zlib';

const wait = (t = 100) => new Promise(r => setTimeout(r, t));
const STR = `<div>${'aaaaaaaaaa'.repeat(500)}</div>`

const server = http.createServer(async (req, res) => {
  console.log('ON REQ');
  if (req.url !== '/') return res.end();

  const zlibStream = zlib.createGzip({
    flush: zlib.constants.Z_SYNC_FLUSH,
  });

  res.setHeader('Content-Type', 'text/html; charset=utf-8');
  res.setHeader('Content-Encoding', 'gzip');
  res.setHeader('Transfer-Encoding', 'chunked');
  zlibStream.pipe(res);
  for (let i = 0; i < 200; i ++) {
    // res.write(`aaa`);
    zlibStream.write(STR);
    await wait(10);
  }

  zlibStream.end();
  // res.end();
});

server.listen(3000);

// test
setTimeout(() => {
  console.log('!');

  const client = http.request({
    host: '0.0.0.0',
    protocol: 'http:',
    port: '3000'
  });

  const zlibStream = zlib.createUnzip({
    flush: zlib.constants.Z_SYNC_FLUSH,
  });

  zlibStream.on('data', (e) => {
    console.log(e);
  })
  
  client.on('response', res => {
    res.on('data', (data) => {
      zlibStream.write(data);
    });
    // console.log('res', res);
    res.on('end', () => {
      zlibStream.end();
      console.log('end');
    })
  })
  
  client.end();
}, 1000);