Learning HTTP/2. A Practical Guide for Beginners

Cover
Copyright
Table of Contents
Preface
	Who Should Read This Book
	What This Book Isn’t
	Recommended Resources
	Conventions Used in This Book
	Using Code Examples
	O’Reilly Safari
	How to Contact Us
	Acknowledgments
		Javier Garza
		Stephen Ludin
Foreword
Chapter 1. The Evolution of HTTP
	HTTP/0.9 and 1.0
	HTTP/1.1
	Beyond 1.1
	SPDY
	HTTP/2
Chapter 2. HTTP/2 Quick Start
	Up and Running
	Get a Certificate
		Use an Online Generator
		Self Signed
		Let’s Encrypt
	Get and Run Your First HTTP/2 Server
	Pick a Browser
Chapter 3. How and Why We Hack the Web
	Performance Challenges Today
		The Anatomy of a Web Page Request
		Critical Performance
		The Problems with HTTP/1
	Web Performance Techniques
		Best Practices for Web Performance
		Anti-Patterns
	Summary
Chapter 4. Transition to HTTP/2
	Browser Support
	Moving to TLS
	Undoing HTTP 1.1 “Optimizations”
	Third Parties
	Supporting Older Clients
	Summary
Chapter 5. The HTTP/2 Protocol
	Layers of HTTP/2
	The Connection
	Frames
	Streams
		Messages
		Flow Control
		Priority
	Server Push
		Pushing an Object
		Choosing What to Push
	Header Compression (HPACK)
	On the Wire
		A Simple GET
	Summary
Chapter 6. HTTP/2 Performance
	Client Implementations
	Latency
	Packet Loss
	Server Push
	Time to First Byte (TTFB)
	Third Parties
	HTTP/2 Anti-Patterns
		Domain Sharding
		Inlining
		Concatenating
		Cookie-less Domains
		Spriting
		Prefetch
	Real-World Performance
		Performance Measurement Methodology
		Study 1: www.facebook.com
		Study 2: www.yahoo.com
	Summary
Chapter 7. HTTP/2 Implementations
	Desktop Web Browsers
		TLS Only
		Disabling HTTP/2
		Support for HTTP/2 Server Push
		Connection Coalescing
		HTTP/2 Debugging Tools
		Beta Channel
	Mobile
	Mobile App Support
	Servers, Proxies, and Caches
	Content Delivery Networks (CDNs)
	Summary
Chapter 8. Debugging h2
	Web Browser Developer Tools
		Chrome Developer Tools
		Firefox Developer Tools
		Debugging h2 on iOS Using Charles Proxy
		Debugging h2 on Android
	WebPagetest
	OpenSSL
		OpenSSL Commands
	nghttp2
		Using nghttp
	curl
		Using curl
	h2i
	Wireshark
	Summary
Chapter 9. What Is Next?
	TCP or UDP?
	QUIC
	TLS 1.3
	HTTP/3?
	Summary
Appendix A. HTTP/2 Frames
	The Frame Header
	DATA
		DATA Frame Fields
		DATA Frame Flags
	HEADERS
		HEADERS Frame Fields
		HEADERS Frame Flags
	PRIORITY
		PRIORITY Frame Fields
	RST_STREAM
	SETTINGS
		SETTINGS Parameters
	PUSH_PROMISE
		PUSH_PROMISE Frame Fields
		PUSH_PROMISE Frame Flags
	PING
	GOAWAY
		GOAWAY Frame Fields
	WINDOW_UPDATE
		WINDOW_UPDATE Frame Fields
	CONTINUATION
		CONTINUATION Frame Fields
		CONTINUATION Frame Flags
Appendix B. Tools Reference
Index
About the Authors
Colophon