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HTML5 WebSockets offer app developers a much smaller and more efficient way of communicating than classic HTTP for smoother, faster, and full-duplex communication with the server. With this practical book, you’ll learn how to take advantage of WebSockets power, from the basics of getting started to the complexities of managing rich communications channels.
Move from "classic" HTTP requests to smaller, more nimble WebSockets
Explores how WebSockets affect scaling in larger applications
Learn how to use WebSockets with browsers that don't support them natively
Discover how to keep WebSocket-based systems running even as tasks and environments change over time
Subject is truly interesting and the author seems to know his stuff. But updates are lagging and I'm waiting to get past ch.4 since a couple of months. The example in chapter 4 required a lot of handling (RabbitMQ, Vagrant, AMQP, etc.) not directly related to WebSocket, so I hope that projects in the coming chapters will be more focused and avoid irrelevant complexities.
Bottom Line Yes, I would recommend this to a friend