Download E-books Node.js in Action PDF

By Mike Cantelon, Marc Harter, TJ Holowaychuk, Nathan Rajlich


Node.js in Action is an example-driven instructional that begins at sq. one and courses you thru the entire good points, concepts, and ideas you will need to construct production-quality Node functions. you will begin through studying how you can organize your Node improvement atmosphere, together with loading the community-created extensions. subsequent, you are going to run numerous easy demonstration courses the place you will study the fundamentals of some universal varieties of Node purposes. Then you will dive into asynchronous programming, a version Node leverages to reduce software bottlenecks.

About this Book

JavaScript at the server? You guess. Node.js is a JavaScript server in a position to assisting scalable, high-performance net purposes. utilizing asynchronous I/O, the server can do a couple of factor at a time, a key requirement for real-time apps like chat, video games, and stay statistics. and because it is JavaScript, you employ an analogous language finish to finish.

Node.js in Action exhibits you the way to construct production-quality functions. transparent introductions of key recommendations and example-by-example insurance take you from setup to deployment. you will dive into asynchronous programming, facts garage, and output templating, and engage with the filesystem to create non-HTTP purposes like TCP/IP servers and command-line instruments. ideal for an internet developer transitioning from Rails, Django, or personal home page. calls for simple wisdom of JavaScript. No previous adventure with Node.js wanted.

Purchase of the print ebook incorporates a unfastened e-book in PDF, Kindle, and ePub codecs from Manning courses.

What's Inside

  • Set up Node and extensions
  • Grok asynchronous programming and the development loop
  • Examples together with microblogging, IM, video games, and more

About the Authors

As expert practitioners, specialist lecturers and running shoes, and members to the center framework, authors Mike Cantelon, Marc Harter, T.J. Holowaychuk, and Nathan Rajlich symbolize the easiest of the Node.js improvement group.

Table of Contents

  1. Welcome to Node.js
  2. Building a multiroom chat application
  3. Node programming fundamentals
  4. PART 2 internet program improvement WITH NODE
  5. Building Node net applications
  6. Storing Node software data
  7. Connect
  8. Connect's integrated middleware
  9. Express
  10. Advanced Express
  11. Testing Node applications
  12. Web software templating
  13. PART three GOING additional WITH NODE
  14. Deploying Node functions and conserving uptime
  15. Beyond internet servers
  16. The Node ecosystem

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Session()) . use(connect. csrf()); one other point of net improvement is making sure verbose logs and exact errors reporting can be found either in construction and improvement environments. Let’s examine the errorHandler() middleware part, that's designed to just do that. 7. three. three errorHandler(): improvement mistakes dealing with The errorHandler() middleware part bundled with attach is perfect for improvement, delivering verbose HTML, JSON, and plain-text blunders responses in keeping with the settle for header box. It’s intended to be used in the course of improvement and shouldn’t be a part of the creation configuration. simple utilization quite often this part can be the final used so it might probably capture all error: var app = connect() . use(connect. logger('dev')) . use(function(req, res, next){ setTimeout(function () { next(new Error('something broke! ')); }, 500); }) . use(connect. errorHandler()); Middleware that handles net software protection 169 determine 7. four Connect’s default errorHandler() middleware as displayed in an internet browser RECEIVING AN HTML mistakes reaction when you view any web page on your browser with the setup proven the following, you’ll see a attach blunders web page just like the one proven in determine 7. four, showing the mistake message, the reaction prestige, and the complete stack hint. RECEIVING A PLAIN-TEXT errors reaction Now consider you’re trying out an API outfitted with attach. It’s faraway from excellent to reply with a wide bite of HTML, so via default errorHandler() will reply with textual content/ undeniable, that's perfect for command-line HTTP consumers similar to curl(1). this is often illustrated within the following stdout: $ curl http://localhost/ blunders: anything broke! at item. deal with (/Users/tj/Projects/node-in-action/source ➥/connect-middleware-errorHandler. js:12:10) at subsequent (/Users/tj/Projects/connect/lib/proto. js:179:15) at item. logger [as deal with] (/Users/tj/Projects/connect ➥/lib/middleware/logger. js:155:5) at subsequent (/Users/tj/Projects/connect/lib/proto. js:179:15) at functionality. deal with (/Users/tj/Projects/connect/lib/proto. js:192:3) at Server. app (/Users/tj/Projects/connect/lib/connect. js:53:31) at Server. emit (events. js:67:17) at HTTPParser. onIncoming (http. js:1134:12) at HTTPParser. onHeadersComplete (http. js:108:31) at Socket. ondata (http. js:1029:22) 170 bankruptcy 7 Connect’s integrated middleware RECEIVING A JSON errors reaction should you ship an HTTP request that has the settle for: application/json HTTP header, you’ll get the next JSON reaction: $ curl http://localhost/ -H "Accept: application/json" {"error":{"stack":"Error: anything broke! \n ➥at item. deal with (/Users/tj/Projects/node-in-action ➥/source/connect-middleware-errorHandler. js:12:10)\n ➥at subsequent (/Users/tj/Projects/connect/lib/proto. js:179:15)\n ➥at item. logger [as deal with] (/Users/tj/Projects ➥/connect/lib/middleware/logger. js:155:5)\n ➥at subsequent (/Users/tj/Projects/connect/lib/proto. js:179:15)\n ➥at functionality. deal with (/Users/tj/Projects/connect/lib/proto. js:192:3)\n ➥at Server. app (/Users/tj/Projects/connect/lib/connect. js:53:31)\n ➥at Server. emit (events.

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