Code files

Chapter04/piping-streams-in-production/big-file-server/index.js

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+'use strict'
+
+const fs = require('fs')
+const http = require('http')
+const pump = require('pump')
+
+const server = http.createServer((req, res) => {
+  const stream = fs.createReadStream('big.file')
+  pump(stream, res, done)
+})
+
+function done (err) {
+  if (err) {
+    return console.error('File was not fully streamed to the user', err)
+  }
+  console.log('File was fully streamed to the user')
+}
+
+server.listen(3000)

Chapter04/piping-streams-in-production/big-file-server/package.json

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+{
+  "name": "big-file-server",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pump": "^1.0.2"
+  }
+}

Chapter04/piping-streams-in-production/pumpified-pipeline/index.js

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+'use strict'
+
+const { createGzip } = require('zlib')
+const { createCipher } = require('crypto')
+const pumpify = require('pumpify')
+const base64 = require('base64-encode-stream')
+
+function pipeline () {
+  const stream1 = createGzip()
+  const stream2 = createCipher('aes192', 'secretz')
+  const stream3 = base64()
+  return pumpify(stream1, stream2, stream3)
+}
+
+const pipe = pipeline()
+
+pipe.end('written to stream1')
+
+pipe.on('data', (data) => {
+  console.log('stream3 says: ', data.toString())
+})
+
+pipe.on('finish', () => {
+  console.log('all data was successfully flushed to stream3')
+})

Chapter04/piping-streams-in-production/pumpified-pipeline/package.json

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+{
+  "name": "pumpified-pipeline",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "base64-encode-stream": "^1.0.0",
+    "pumpify": "^1.3.5"
+  }
+}