Code files

Chapter01/debugging-with-devtools/app/future.js

@@ -0,0 +1,3 @@
+module.exports = (age, gap) => {
+  return `In ${gap} years you will be ${Number(age) + gap}<br>`
+}

Chapter01/debugging-with-devtools/app/index.js

@@ -0,0 +1,10 @@
+const express = require('express')
+const app = express()
+const past = require('./past')
+const future = require('./future')
+
+app.get('/:age', (req, res) => {
+  res.send(past(req.params.age, 10) + future(req.params.future, 10))
+})
+
+app.listen(3000)

Chapter01/debugging-with-devtools/app/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.2"
+  }
+}

Chapter01/debugging-with-devtools/app/past.js

@@ -0,0 +1,3 @@
+module.exports = (age, gap) => {
+  return `${gap} years ago you were ${Number(age) - gap}<br>`
+}

Chapter01/enabling-core-debug-logs/app/index.js

@@ -0,0 +1,11 @@
+const express = require('express')
+const app = express()
+
+app.get('/', (req, res) => res.send('hey'))
+
+
+setTimeout(function myTimeout() { 
+   console.log('I waited for you.')
+}, 100)
+
+app.listen(3000)

Chapter01/enabling-core-debug-logs/app/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.0"
+  }
+}

Chapter01/enabling-core-debug-logs/instrumented-app/index.js

@@ -0,0 +1,16 @@
+const util = require('util')
+const express = require('express')
+const debug = util.debuglog('my-app')
+const app = express()
+
+app.get('/', (req, res) => {
+  debug('incoming request on /', req.route)
+  res.send('hey')
+})
+
+setTimeout(function myTimeout() { 
+   debug('timeout complete')
+   console.log('I waited for you.')
+}, 100)
+
+app.listen(3000)

Chapter01/enabling-core-debug-logs/instrumented-app/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.0"
+  }
+}

Chapter01/enabling-debug-logs/app/index.js

@@ -0,0 +1,13 @@
+const express = require('express')
+const app = express()
+const stylus = require('stylus')
+
+app.get('/some.css', (req, res) => {
+  const css = stylus(`
+    body
+      color:black
+  `).render()
+  res.send(css)
+})
+
+app.listen(3000)

Chapter01/enabling-debug-logs/app/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.0",
+    "stylus": "^0.54.5"
+  }
+}

Chapter01/enabling-debug-logs/instrumented-app/index.js

@@ -0,0 +1,15 @@
+const express = require('express')
+const app = express()
+const stylus = require('stylus')
+const debug = require('debug')('my-app')
+
+app.get('/some.css', (req, res) => {
+  debug('css requested')
+  const css = stylus(`
+    body
+      color:black
+  `).render()
+  res.send(css)
+})
+
+app.listen(3000)

Chapter01/enabling-debug-logs/instrumented-app/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "debug": "^2.6.2",
+    "express": "^4.15.0",
+    "stylus": "^0.54.5"
+  }
+}

Chapter01/enabling-debug-logs/logging-app/index.js

@@ -0,0 +1,13 @@
+const express = require('express')
+const app = express()
+const stylus = require('stylus')
+
+app.get('/some.css', (req, res) => {
+  const css = stylus(`
+    body
+      color:black
+  `).render()
+  res.send(css)
+})
+
+app.listen(3000)

Chapter01/enabling-debug-logs/logging-app/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "dev": "node index.js",
+    "prod": "node -r pino-debug index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.0",
+    "pino-debug": "^1.0.3",
+    "stylus": "^0.54.5"
+  }
+}

Chapter01/enabling-debug-logs/logging-app/package.json.save

@@ -0,0 +1,18 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node 
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.0",
+    "pino-debug": "^1.0.2",
+    "stylus": "^0.54.5"
+  }
+}

Chapter01/enhancing-stack-traces/app/content.js

@@ -0,0 +1,5 @@
+function content (opts, c = 20) {
+  return --c ? content(opts, c) : opts.ohoh
+}
+
+module.exports = content

Chapter01/enhancing-stack-traces/app/index.js

@@ -0,0 +1,7 @@
+const express = require('express')
+const routes = require('./routes')
+const app = express()
+
+app.use(routes)
+
+app.listen(3000)

Chapter01/enhancing-stack-traces/app/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.2"
+  }
+}

Chapter01/enhancing-stack-traces/app/routes.js

@@ -0,0 +1,9 @@
+const content = require('./content')
+const {Router} = require('express')
+const router = new Router()
+
+router.get('/', (req, res) => {
+  res.send(content())
+})
+
+module.exports = router

Chapter01/enhancing-stack-traces/async-stack-app/content.js

@@ -0,0 +1,9 @@
+function content (opts, c = 20) {
+  function produce (cb) {
+    if (--c) setTimeout(produce, 10, cb)
+    cb(null, opts.ohoh)
+  }
+  return produce
+}
+
+module.exports = content

Chapter01/enhancing-stack-traces/async-stack-app/index.js

@@ -0,0 +1,10 @@
+if (process.env.NODE_ENV !== 'production') {
+  require('longjohn')
+}
+const express = require('express')
+const routes = require('./routes')
+const app = express()
+
+app.use(routes)
+
+app.listen(3000)

Chapter01/enhancing-stack-traces/async-stack-app/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.2"
+  },
+  "devDependencies": {
+    "longjohn": "^0.2.12"
+  }
+}

Chapter01/enhancing-stack-traces/async-stack-app/routes.js

@@ -0,0 +1,15 @@
+const content = require('./content')
+const {Router} = require('express')
+const router = new Router()
+
+router.get('/', (req, res) => {
+  content()((err, html) => { 
+    if (err) {
+      res.send(500)
+      return
+    } 
+    res.send(html)
+  })
+})
+
+module.exports = router

Chapter01/enhancing-stack-traces/infinite-stack-in-dev-app/content.js

@@ -0,0 +1,5 @@
+function content (opts, c = 20) {
+  return --c ? content(opts, c) : opts.ohoh
+}
+
+module.exports = content

Chapter01/enhancing-stack-traces/infinite-stack-in-dev-app/index.js

@@ -0,0 +1,10 @@
+if (process.env.NODE_ENV !== 'production') {
+  Error.stackTraceLimit = Infinity
+}
+const express = require('express')
+const routes = require('./routes')
+const app = express()
+
+app.use(routes)
+
+app.listen(3000)

Chapter01/enhancing-stack-traces/infinite-stack-in-dev-app/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.2"
+  }
+}

Chapter01/enhancing-stack-traces/infinite-stack-in-dev-app/routes.js

@@ -0,0 +1,9 @@
+const content = require('./content')
+const {Router} = require('express')
+const router = new Router()
+
+router.get('/', (req, res) => {
+  res.send(content())
+})
+
+module.exports = router

Chapter01/enhancing-stack-traces/pretty-stack-app/content.js

@@ -0,0 +1,5 @@
+function content (opts, c = 20) {
+  return --c ? content(opts, c) : opts.ohoh
+}
+
+module.exports = content

Chapter01/enhancing-stack-traces/pretty-stack-app/index.js

@@ -0,0 +1,8 @@
+require('cute-stack')()
+const express = require('express')
+const routes = require('./routes')
+const app = express()
+
+app.use(routes)
+
+app.listen(3000)

Chapter01/enhancing-stack-traces/pretty-stack-app/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "cute-stack": "^1.4.3",
+    "express": "^4.15.2"
+  },
+  "devDependencies": {}
+}

Chapter01/enhancing-stack-traces/pretty-stack-app/routes.js

@@ -0,0 +1,9 @@
+const content = require('./content')
+const {Router} = require('express')
+const router = new Router()
+
+router.get('/', (req, res) => {
+  res.send(content())
+})
+
+module.exports = router