Node.js Enable gzip


Example

const http = require('http')
const fs   = require('fs')
const zlib = require('zlib')

http.createServer((request, response) => {
  const stream          = fs.createReadStream('index.html')
  const acceptsEncoding = request.headers['accept-encoding']

  let encoder = {
    hasEncoder     : false,
    contentEncoding: {},
    createEncoder  : () => throw 'There is no encoder'
  }

  if (!acceptsEncoding) {
    acceptsEncoding = ''
  }

  if (acceptsEncoding.match(/\bdeflate\b/)) {
    encoder = {
      hasEncoder     : true,
      contentEncoding: { 'content-encoding': 'deflate' },
      createEncoder  : zlib.createDeflate
    }
  } else if (acceptsEncoding.match(/\bgzip\b/)) {
    encoder = {
      hasEncoder     : true,
      contentEncoding: { 'content-encoding': 'gzip' },
      createEncoder  : zlib.createGzip
    }
  }

  response.writeHead(200, encoder.contentEncoding)

  if (encoder.hasEncoder) {
    stream = stream.pipe(encoder.createEncoder())
  }

  stream.pipe(response)

}).listen(1337)