1. 背景

    正式版http2规格标准叫做RFC 7540，发布于2015年5月15日：http://www.rfc-editor.org/rfc/rfc7540.txt

    如果你有在这篇文章中发现任何我的失误造成的错误或疏漏，请帮我指正。我会在后续版本中修改。

    为了让阅读体验更流畅，在这篇文章中我会使用“http2”来指代这一新协议，但请记住该协议的正式名字是HTTP/2。

    Email:

    Twitter: @bagder

    Web:

    如果你在该文档里面发现任何错误、疏漏，请发送给我一份相关段落更改后的版本，我会进行修正并且注明所有对文档有贡献的人！希望能将这份文档变得越来越好。

    这篇文档可以在http://daniel.haxx.se/http2下载。

    该文档的第一版发布于2014年4月25日。下面是最近主要改动的更新历史。

    • Converted the master version of this document to Markdown syntax
    • 13: Mention more resources, updated links and descriptions
    • 12: Updated the QUIC description with reference to draft
    • 3.4: The average is now 40 TCP connections
    • 6.4: Updated to reflect what the spec says
    • 1.1: HTTP/2 is now in an official RFC
    • 6.5.1: Link to the HPACK RFC
    • 9.1: Mention the Firefox 36+ config switch for http2
    • 12.1: Added section about QUIC
    • Lots of language improvements mostly pointed out by friendly contributors
    • 8.3.1: Mention nginx and Apache httpd specific acitivities
    • 1: The protocol has been “okayed”
    • 4.1: Refreshed the wording since 2014 is last year
    • Front: Added image and call it “http2 explained” there, fixed link
    • 1.4: Added document history section
    • 14: Added thanks to bug reporters
    • 2.4: Better labels for the HTTP growth graph
    • 6.3: Corrected the wagon order in the multiplexed train
    • 6.5.1: HPACK draft-12
    • Updated to HTTP/2 draft-17 and HPACK draft-11
    • Added section “10. http2 in Chromium” (== one page longer now)
    • Lots of spell fixes
    • At 30 implementations now
    • 8.5: Added some current usage numbers
    • 8.3: Mention internet explorer too
    • 8.3.1 Added “missing implementations”
    • 8.4.3: Mention that TLS also increases success rate