December 2012
Beginner
398 pages
9h 6m
English
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Chapter 13. Networking
Many chapters in books like this begin with something like, “The ability to talk to computers over the network is an increasingly popular feature.” We won’t bore you with that. Suffice to say—it’s the 21st century, networking is huge, and you need your app to send and receive data. Let’s learn how.
In this chapter, you’ll learn how to make connections over the network and access resources with URLs. You’ll also learn how to use Bonjour to discover nearby network services so that you can connect to them. Finally, you’ll learn how to create your own network service and receive connections from other devices.
All of the content in this chapter applies to both OS X and iOS.
Connections
At the lowest level, network connections in Cocoa are the same as in every other popular OS. The Berkeley sockets API, the fundamental networking and connectivity API used on Windows and almost every Unix OS (which includes OS X and iOS), is available, allowing you to make connections to any computer on the network and send and receive data.
However, working with such a low-level API can be cumbersome, especially when you want to use popular, higher-level protocols like HTTP. To make things more fun for developers like us, Cocoa provides a higher-level API that provides a simple interface for accessing content via URLs on the Internet.
Note
A URL is a Uniform Resource Locator. It’s a location on the Internet, and specifies the location of the server to connect to, the protocol to use, ...
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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.