September 2015
Intermediate to advanced
150 pages
3h 9m
English
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Chapter 5. WebSocket Compatibility
The technology behind WebSocket is to allow bidirectional communication between client and server. A native WebSocket implementation minimizes server resource usage and provides a consistent method of communicating between client and server. As with the adoption of HTML5 in client browsers, the landscape of support is relegated to modern browsers. That means no support for any user with Internet Explorer less than 10, and mobile browser support less than iOS Safari 6 and Chrome for Android.
Here are just some of the versions with RFC 6455 WebSocket support:
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Internet Explorer 10
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Firefox 6
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Chrome 14
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Safari 6.0
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Opera 12.1
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iOS Safari 6.0
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Chrome for Android 27.0
This chapter outlines options for supporting older browsers that predate the WebSocket RFC 6455 spec when you want to take advantage of bidirectional communication in your application. The platforms you’ll look at solve compatibility issues with older client browsers, and add a layer of organization for your messages.
SockJS
SockJS is a JavaScript library that provides a WebSocket-like object in the browser. The library is compatible with many more browsers due to its conditional use of multiple browser transports. It will use WebSocket if the option is available as a first choice. If a native connection is not available, it can fall back to streaming, and finally polling if that is also unavailable. This provides nearly full browser and restrictive proxy support, as shown ...
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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.