October 2012
Intermediate to advanced
408 pages
7h 35m
English
Content preview from Professional Node.js: Building Javascript Based Scalable SoftwareBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 21
Making a Web Application Using Express.js
WHAT’S IN THIS CHAPTER?
- Installing Express
- Starting a web application using Express
- Defining Express middleware
- Rendering Jade templates
- Defining URL route listeners
- Creating route middleware
For some languages and platforms there are frameworks that simplify the job of crafting an HTTP-based application. Perhaps the best known is Rails (for the Ruby language), but countless others include Django, Sinatra, and Cake. Most have the goal of simplifying and structuring the development of HTML applications and solving some common problems like routing the HTTP request to the correct controller code, serving static assets, and rendering HTML templates.
In the Node world several modules and frameworks also solve some of these and other problems. Some are separate modules that you can glue together, and some, like Express.js, offer an integrated solution that you can rapidly implement.
Express.js is based on the Connect middleware engine: Any Connect-specific middleware will also work with Express. Besides allowing you to set up middleware to respond to HTTP requests, Express.js allows you perform different actions based on the HTTP method and URL – by letting you define a routing table. It also allows you to dynamically render HTML documents based on supplying arguments to templates.
INITIALIZING YOUR EXPRESS.JS APPLICATION
This section shows you how to create an Express application from scratch, but first you must install Express ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.