Index. Bare-bones connect application, 125 Binary JSON (BSON), 171. Callback functions asynchronous code ifelse, 199 loops,

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1 Index A Amazon Web Services (AWS) console, EBS, 262 EC2 Amazon Linux AMI, 262, 265 connect script and sample usage, 271 dashboard and Launch Instance, 265 global package installation, 273 hard disk storage, 268 instance details configuration, 267 instance types, 262, 266 IP address and public DNS, key pair, , 269 Node.js application, NPM, 272 security group, 264, 269 service dashboard, 261 Stop shutdown behavior, 267 virtual machine, 262 features, 260 VPC, 263 AngularJS application controller, data-binding/templating, 183 dependency injection, 183 directives, 187 Express server, 185 Google search trends, 183 index.html file, modules, 187 resources, 196 $scope, to-do list application createguid function, 189 guidservice, 189 HTML, 190 JavaScript, MainController function, 190 ng-repeat directive, 191 REST API (see REST API) execution, 191 vm.additem function, 191 URL handling/routing, 183 Async module definition (AMD), 56 browserify app.js file, 63 bar.js file, 62 command prompt, 62 foo.js file, 62 installation, 61 NPM modules, 61 reuse Node.js code, 64 CommonJS, 56 exports variables, 58 features, 61 loading, 56 network tab, 60 RequireJS, 57 run application, async.parallel function, 201 B Bare-bones connect application, 125 Binary JSON (BSON), 171 C Callback functions asynchronous code ifelse, 199 loops,

2 index Callback functions (cont.) error handling asynchronous version, , 205 catch execution, JSON.parse error, 203 synchronous version, 202 generators code execution, 219 ECMAScript 6, 219 iteration, 220 iterator.next(somevalue) function, iterator.throw(errorobject) function, 221 returning values, 219 value bar, 221 indentation, promise chain benefits, 206 catch function, creation, 206 deferred.resolve, 215 fulfilled state, 207 generators, inspect method, 218 library compatibility, 217 nodeback function (see Nodeback function) non-nodeback functions, 213 onfulfilled handler, 209 parallel flow control, pending state, 207 promise.done method, 217 Q.defer() object, 206 rejected state, 207 then function, 206 uncaught exception, 210, 216 CAP theorem, 167 Cascading Style Sheets (CSS), 119 -c command line flag, 256 Connect/Express middleware body-parser middleware, 144 compression/compress.js, 150 connect-timeout, 151 cookie-based sessions, 149 cookies cookie/1basic.js, 146 cookie/2show.js, 146 cookie/3parsed.js, 147 cookie/4clear.js, 147 cookie/5sign.js, 148 with curl, 146 digital signature, 148 expiry time, 149 httponly and secure, 149 res.clearcookie function, 147 res.cookie function, 146 directory contents, 143 propogateerror, 152 static pages, 142 timeout/error.js, 152 Core modules consuming module, 52 fs module, 53 os module, 54 path module dirname/basename/extname, 53 join function, 52 path.normalize(str), 52 util module, 55 createguid function, 189 D Data-intensive applications (DIA), 29 Data persistence MongoDB binaries, 168 BSON, 171 collection, 169 crud/basic.js, 172 databases, 169 dbpath, 168 distributed session store, 177 _id field, 170 MMS, 179 MongoClient, 171 MongoDB REPL, 168 ObjectId, odm/connection.js, 175 primary keys, 170 Robomongo, 179 save function, 173 update function, Mongoose ODM complex queries, 177 connect member function, 175 Model function, 175 odm/basic.js, 176 saving/updating, 176 Schema class, 175 single item query, 176 NoSQL availability, CAP theorem, 167 consistency, document database, 165 key-value store, 166 ORM, 167 partition tolerance,

3 Index Debugging application console object console.error function, 228 console.log function, 228 console.timeend function, 226 console.time function, 226 console.trace function, 227 error object, 228 logging, 225 debugger statement, 229 Node-inspector, 231 Node.js configuration debug option, 237 debug windows, 240 edit configurations dialog, 237 random debug port, 239 run configuration options, 238 WebStorm project, 237 node's built-in debugger, 229 remote debugging code implementation, 235 HTTP server, 235 inserting breakpoint, 236 launching node-inspector, 235 observing variables, 236 resources, 240 Debugging proxy, 117 demoapp.controller, 188 Deployment and scalability -c command line flag, 256 crashing, 255 error handler middleware, 256 JavaScript thread, 256 unhandled error, 255 E Elastic Compute Cloud (EC2) additional resources, 273 Amazon Linux AMI, 262, 265 connect script and sample usage, 271 dashboard and Launch Instance, 265 global package installation, 273 hard disk storage, 268 instance details configuration, 267 instance types, 262, 266 IP address and public DNS, 270 key pair, , 269 Node.js application, 273 NPM, 272 security group, 264, 269 service dashboard, 261 Stop shutdown behavior, 267 virtual machine, 262 Events EventEmitter class error event, 105 event handling function, 100 functional custom, 106 listener management, 102 memory leaks, 103 multiple subscribers, 100 removelistener function, 101 process exit, 107 global exception handler, 107 signals, 108 ExpressJS middleware Connect/Express (see Connect/Express middleware) express request object, 155 express response object, 153 intro/1basic.js, 141 intro/2simpler.js, 142 listen function, 141 REST, 156 routes approute/1verbs.js, curl, 162 express.router() function, 160 object creation, 158 parameter-based routing, 159 path prefix, 158 router/basic.js, 160 router object creation, 160 use function, 141 F, G File system module CommonJS module specification, 41 entire folder, 47 global variable app.js, 51 Buffer class, 50 command line arguments, 49 console, 48 dirname, 49 filename, 49 process.nexttick, 50 timers, 48 js extension, 47 module.exports alias, 45 empty object, 45 foo.js file, 41 relative paths, 47 require function app.js,

4 index File system module (cont.) bar.js file, 41, 44 blocks, 43 cached function, 43 foo function, 42, 44 include function, 42 lazy load module, 43 object factory, 44 utilize exports, 47 Front-end application SPA AngularJS (see AngularJS application) client-side XHRs, 182 main template, 182 user experience, 182 web site, Twitter Bootstrap, H HyperText Markup Language (HTML), 119, 121 HyperText Transfer Protocol (HTTP) connect middleware authentication, 130 bare-bones connect application, 125 configuration, 128 creation, 126 error handler, 133 JSON request and response, 129 objects, 128 path prefixes, 127 core networking modules, 115 cryptography keys, 135 curl, 116 debugging proxy, 117 file web server 404 Not Found HTTP response, 121 directory serving, 122 index.html, server/public/index.html, 121 2server/server.js, 121 headers, 116 listen function, 115, 125 MIME NPM package, 120 MIME types, create/1raw.js, 116 public/private key, 136 redirect client requests, 138 redirect response, 139 request stream, 120 response.getheader function, 120 response.removeheader function, 120 response.setheader function, 120 response.setheader(name, value) member function, 119 response stream, 119 response.writehead function, 120 secure communication, 136 server creation, 137 status code, 119 I Inheritance pattern Animal class functionality, 92 Bird class, 92 child classes, 97 code implementation, 99 constructor property, 95 instanceof operator, 97 member function, 91 Object.create function, parent constructor, 93 prototype chain, 94 util core module, 96 Integrated Development Environment (IDE) Visual Studio adding debug mode, 13 breakpoint activation, 14 configuration options, 15 execution, 14 local variables and call stack, 14 new Node creation, 12 WebStorm adding new file, 9 configuration options, 11 editing configuration, 10 new project creation, 8 script execution, 9 10 itemsloaded function, 201 iterator.throw(errorobject) function, 221 J JavaScript class.js, 38 default values, 32 error handling async function, 39 async workflow, 39 catch keyword, 38 finally keyword, 38 getconnection function, 39 settimeout, 39 throw keyword, 38 exact equality, 32 GitHub, 31 null object, 33 prototype 278

5 Index bas.bar, 37 bas. proto.bar, 37 definition, 36 function foo(), 36 instance.somememberfunction(), 38 proto, 36 reference, 31 revealing module pattern, 34 this keyword, 34 truthy and falsy values, 33 JavaScript Object Notation (JSON), 119 array, 70 boolean value, 70 global object, 71 loading object, 71 null, 70 number value, 70 require function, 78 specification and shield users, 69 string value, 70 JQuery, 185 K Key-Hash message authentication code (HMAC), 148 L loaditem function, 201 loadjsonasync function, 215 loadjsonsync function, 202 M Man-in-the-Middle (MitM) attack, 138 maybesync function, 199 Middleware, 125 Model-View-Controller (MVC), 188 MongoDB binaries, 168 BSON, 171 collection, 169 crud/basic.js, 172 databases, 169 dbpath, 168 distributed session store, 177 _id field, 170 MMS, 179 MongoClient, 171 MongoDB REPL, 168 ObjectId, odm/connection.js, 175 primary keys, 170 Robomongo, 179 save function, 173 update function, 173 MongoDB Management Service (MMS), 179 N Nodeback function -Async postfix, 212 community-written modules, 211 core Node.js modules, 211 loadjsonasync function, promises+nodeback interface, Q.nbind, Sync postfix, 212 Node.js closures, 22 DIA, 29 thread starvation, 28 V8 JavaScript engine, 31 Node.js clustering http.createserver().listen, 259 ideal worker count, 258 multiple Node.js HTTP processes, 260 spawning workers, 257 Node.js development IDE (see Integrated Development Environment (IDE)) JavaScript execution, 7 Mac OS X installer, 4 REPL, 6 Windows installer, 2 Node.js functions anonymous functions, 21 functionbody, 20 functionreturn, 20 higher-order functions, 22 immediately executing functions, 20 Node.js packages advantages, bar.js, 66 file-based vs.node_modules, 67 global modules, 78 implicit loading, JSON array, 70 boolean value, 70 global object, 71 loading object, 71 null, 70 number value, 70 require function, 78 specification and shield users, 69 string value, 70 module caching and node_modules, 69 modules recap,

6 index Node.js packages (cont.) NPM installation, 74 listing dependency, 75 node_modules folder, 74 package.json online dependency tracking, 73, 75 removing dependency, 75 saving dependency, 74 popular Node packages advantage, 87 ANSI escape codes, 87 built-in JavaScript Date type, 83 colors package, 86 definegetter / definesetter member functions, 88 features, handling command line arguments, 82 JavaScript string, 87 reliable string parsing, 84 serializing dates, 85 String.prototype, 89 underscore, 80 resources, 89 revisiting Node modules, 65 semantic versioning definition, 76 NPM/package.json, 76 updating dependency, 77 Node.js performance I/O scaling problem, 23 Nginx way, 25 simulateuserclick.js, 27 simulatewebrequest.js, 27 web servers process per request, 24 thread pool, 24 Node.js variables arrays, 18 boolean, 18 numbers, 17 object literals, 18 Node Package Manager (NPM), 2, 61 EC2, 272 installation, 74 listing dependency, 75 node_modules folder, 74 package.json online dependency tracking, 73, 75 removing dependency, 75 saving dependency, 74 Not Only SQL (NoSQL) availability, CAP theorem, 167 consistency, document database, 165 key-value store, 166 ORM, 167 partition tolerance, 166 O Object Document Mapper (ODM), 175 Object Relational Mapping (ORM), 167 P Portable Network Graphics (PNG), 119 process.nexttick function, 199 promise.then member function, 205 Q Q.async function, 222 Q.reject function, 209 Q.spawn function, 222 R Read-evaluate-print-loop (REPL), 6 Representational State Transfer (REST), 156 REST API $http service, 193 ExpressJS router-based API, JavaScript, MongoDB execution, 195 then member function, 195 todowebservice, 195 S setinterval function, 48 settimeout function, 48 Single page applications (SPA) AngularJS (see AngularJS application) client-side XHRs, 182 main template, 182 user experience, 182 web site, 181 Social Security Number (SSN), 170 SSL certification, 138 Streams buffered web response, 109 duplex stream, 109 inheritance mechanism, 112 performant web applications, 108 pipe, 110 readable stream, 109, streaming web response, 109 transform stream, 109 writable stream, 109, 111,

7 Index T, U Testing assert action and validation function, 244 assert.equal function, 241 class implementation, 242 List class, 242 Chai additional assertions, 251 BDD style assertions, 252 Plug-ins, 252 Mocha async testing, 248 command line options, definition, 244, 247 hooks, 246 installation, 244 it functions, 244, 247 testing promises, 250 resources, 253 Thread starvation, 28 Twitter Bootstrap, V, W V8 JavaScript engine, 31 ViewModel (VM), 188 Virtual Private Cloud (VPC), 263 X, Y, Z XMLHttpRequest (XHR),