Book Image

Node Cookbook

By : David Mark Clements
Book Image

Node Cookbook

By: David Mark Clements

Overview of this book

The principles of asynchronous event-driven programming are perfect for today's web, where efficient real-time applications and scalability are at the forefront. Server-side JavaScript has been here since the 90's but Node got it right. With a thriving community and interest from Internet giants, it could be the PHP of tomorrow. "Node Cookbook" shows you how to transfer your JavaScript skills to server side programming. With simple examples and supporting code, "Node Cookbook" talks you through various server side scenarios often saving you time, effort, and trouble by demonstrating best practices and showing you how to avoid security faux pas. Beginning with making your own web server, the practical recipes in this cookbook are designed to smoothly progress you to making full web applications, command line applications, and Node modules. Node Cookbook takes you through interfacing with various database backends such as MySQL, MongoDB and Redis, working with web sockets, and interfacing with network protocols, such as SMTP. Additionally, there are recipes on correctly performing heavy computations, security implementations, writing, your own Node modules and different ways to take your apps live.
Table of Contents (16 chapters)
Node Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Using Node as an HTTP client


The HTTP object doesn't just provide server capabilities, it also affords us with client functionality. In this task, we're going to use http.get with process to fetch external web pages dynamically via the command line.

Getting ready

We are not creating a server, so in the naming convention we should use a different name for our new file, let's call it fetch.js.

How to do it...

http.request allows us to make requests of any kind (for example, GET, POST, DELETE, OPTION, and so on), but for GET requests we can use the short-hand http.get method as follows:

var http = require('http');
var urlOpts = {host: 'www.nodejs.org', path: '/', port: '80'};
http.get(urlOpts, function (response) {
response.on('data', function (chunk) {
console.log(chunk.toString());
});
});

Essentially we're done.

node fetch.js

If we run the preceding command, our console will output the HTML of nodejs.org. However, let's pad it out a bit with some interactivity and error handling as shown in...