Session about Node.js streams with Kelvin

cp.js

import { createReadStream, createWriteStream } from 'fs'

const source = createReadStream('./assets/moby-dick.txt')
const dest = createWriteStream('./assets/moby-dick-decompressed.txt')

source
  .pipe(dest)

simple-decompress.js

import { createReadStream, createWriteStream } from 'fs'
import { createGunzip } from 'zlib'

const source = createReadStream('./assets/moby-dick.txt.gz')
const decompress = createGunzip()
const dest = createWriteStream('./assets/moby-dick-decompressed.txt')

source
  .pipe(decompress)
  .pipe(dest)

test-compression.js

import { createReadStream, createWriteStream } from 'fs'
import { createBrotliCompress, createGzip, createDeflate } from 'zlib'

const source = createReadStream('./assets/moby-dick.txt')
const destGzip = createWriteStream('./results/moby-dick.txt.gz')
const destBrotli = createWriteStream('./results/moby-dick.txt.br')
const destDeflate = createWriteStream('./results/moby-dick.txt.deflate')
const gzip = createGzip()
const brotli = createBrotliCompress()
const deflate = createDeflate()

source
  .pipe(gzip)
  .pipe(destGzip)

source
  .pipe(brotli)
  .pipe(destBrotli)

source
  .pipe(deflate)
  .pipe(destDeflate)