Darren Cook
Data Push Apps with HTML5 SSE
Data Push Apps with HTML5 SSE
by Darren Cook
Copyright © 2014 Darren Cook. All rights reserved.
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March 2014:
First Edition
Revision History for the First Edition:
2014-03-17: First release
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ISBN: 978-1-449-37193-7
[LSI]
Table of Contents
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
1.
All About SSE...And Then Some. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HTML5 2
Data Push 2
Other Names for Data Push 6
Potential Applications 6
Comparison with WebSockets 7
When Data Push Is the Wrong Choice 9
Decisions, Decisions… 11
Take Me to Your Code! 13
2.
Super Simple Easy SSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Minimal Example: The Frontend 15
Using JQuery? 19
Minimal Example: The Backend 20
The Backend in Node.js 22
Minimal Web Server in Node.js 22
Pushing SSE in Node.js 23
Now to Get It Working in a Browser! 25
Smart, Sassy Exit 27
3.
A Delightfully Realistic Data Push Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Our Problem Domain 29
The Backend 30
The Frontend 35
Realistic, Repeatable, Random Data 36
Fine-Grained Timestamps 39
Taking Control of the Randomness 42
iii
