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draft-ietf-quic-http.html
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<!DOCTYPE html>
<html lang="en" class="Internet-Draft">
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<title>Hypertext Transfer Protocol Version 3 (HTTP/3)</title>
<meta content="Mike Bishop" name="author">
<meta content="
The QUIC transport protocol has several features that are desirable in a
transport for HTTP, such as stream multiplexing, per-stream flow control, and
low-latency connection establishment. This document describes a mapping of HTTP
semantics over QUIC. This document also identifies HTTP/2 features that are
subsumed by QUIC, and describes how HTTP/2 extensions can be ported to HTTP/3.
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</head>
<body>
<table class="ears">
<thead><tr>
<td class="left">Internet-Draft</td>
<td class="center">HTTP/3</td>
<td class="right">January 2021</td>
</tr></thead>
<tfoot><tr>
<td class="left">Bishop</td>
<td class="center">Expires 11 July 2021</td>
<td class="right">[Page]</td>
</tr></tfoot>
</table>
<div id="external-metadata" class="document-information"></div>
<div id="internal-metadata" class="document-information">
<dl id="identifiers">
<dt class="label-workgroup">Workgroup:</dt>
<dd class="workgroup">QUIC</dd>
<dt class="label-internet-draft">Internet-Draft:</dt>
<dd class="internet-draft">draft-ietf-quic-http</dd>
<dt class="label-published">Published:</dt>
<dd class="published">
<time datetime="2021-01-07" class="published">7 January 2021</time>
</dd>
<dt class="label-intended-status">Intended Status:</dt>
<dd class="intended-status">Standards Track</dd>
<dt class="label-expires">Expires:</dt>
<dd class="expires"><time datetime="2021-07-11">11 July 2021</time></dd>
<dt class="label-authors">Author:</dt>
<dd class="authors">
<div class="author">
<div class="author-name">M. Bishop, <span class="editor">Ed.</span>
</div>
<div class="org">Akamai</div>
</div>
</dd>
</dl>
</div>
<h1 id="title">Hypertext Transfer Protocol Version 3 (HTTP/3)</h1>
<section id="section-abstract">
<h2 id="abstract"><a href="#abstract" class="selfRef">Abstract</a></h2>
<p id="section-abstract-1">The QUIC transport protocol has several features that are desirable in a
transport for HTTP, such as stream multiplexing, per-stream flow control, and
low-latency connection establishment. This document describes a mapping of HTTP
semantics over QUIC. This document also identifies HTTP/2 features that are
subsumed by QUIC, and describes how HTTP/2 extensions can be ported to HTTP/3.<a href="#section-abstract-1" class="pilcrow">¶</a></p>
</section>
<section class="note" id="section-note.1">
<h2 id="name-do-not-deploy-this-version-">
<a href="#name-do-not-deploy-this-version-" class="section-name selfRef">DO NOT DEPLOY THIS VERSION OF HTTP</a>
</h2>
<p id="section-note.1-1">DO NOT DEPLOY THIS VERSION OF HTTP/3 UNTIL IT IS IN AN RFC. This version is
still a work in progress. For trial deployments, please use earlier versions.<a href="#section-note.1-1" class="pilcrow">¶</a></p>
</section>
<section class="note" id="section-note.2">
<h2 id="name-note-to-readers">
<a href="#name-note-to-readers" class="section-name selfRef">Note to Readers</a>
</h2>
<p id="section-note.2-1">Discussion of this draft takes place on the QUIC working group mailing list
(quic@ietf.org), which is archived at
<span><a href="https://mailarchive.ietf.org/arch/search/?email_list=quic">https://mailarchive.ietf.org/arch/search/?email_list=quic</a></span>.<a href="#section-note.2-1" class="pilcrow">¶</a></p>
<p id="section-note.2-2">Working Group information can be found at <span><a href="https://github.com/quicwg">https://github.com/quicwg</a></span>; source
code and issues list for this draft can be found at
<span><a href="https://github.com/quicwg/base-drafts/labels/-http">https://github.com/quicwg/base-drafts/labels/-http</a></span>.<a href="#section-note.2-2" class="pilcrow">¶</a></p>
</section>
<div id="status-of-memo">
<section id="section-boilerplate.1">
<h2 id="name-status-of-this-memo">
<a href="#name-status-of-this-memo" class="section-name selfRef">Status of This Memo</a>
</h2>
<p id="section-boilerplate.1-1">
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.<a href="#section-boilerplate.1-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-2">
Internet-Drafts are working documents of the Internet Engineering Task
Force (IETF). Note that other groups may also distribute working
documents as Internet-Drafts. The list of current Internet-Drafts is
at <span><a href="https://datatracker.ietf.org/drafts/current/">https://datatracker.ietf.org/drafts/current/</a></span>.<a href="#section-boilerplate.1-2" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-3">
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."<a href="#section-boilerplate.1-3" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-4">
This Internet-Draft will expire on 11 July 2021.<a href="#section-boilerplate.1-4" class="pilcrow">¶</a></p>
</section>
</div>
<div id="copyright">
<section id="section-boilerplate.2">
<h2 id="name-copyright-notice">
<a href="#name-copyright-notice" class="section-name selfRef">Copyright Notice</a>
</h2>
<p id="section-boilerplate.2-1">
Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.<a href="#section-boilerplate.2-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.2-2">
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(<span><a href="https://trustee.ietf.org/license-info">https://trustee.ietf.org/license-info</a></span>) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with
respect to this document. Code Components extracted from this
document must include Simplified BSD License text as described in
Section 4.e of the Trust Legal Provisions and are provided without
warranty as described in the Simplified BSD License.<a href="#section-boilerplate.2-2" class="pilcrow">¶</a></p>
</section>
</div>
<div id="toc">
<section id="section-toc.1">
<a href="#" onclick="scroll(0,0)" class="toplink">▲</a><h2 id="name-table-of-contents">
<a href="#name-table-of-contents" class="section-name selfRef">Table of Contents</a>
</h2>
<nav class="toc"><ul class="toc compact ulEmpty">
<li class="toc compact ulEmpty" id="section-toc.1-1.1">
<p id="section-toc.1-1.1.1" class="keepWithNext"><a href="#section-1" class="xref">1</a>. <a href="#name-introduction" class="xref">Introduction</a><a href="#section-toc.1-1.1.1" class="pilcrow">¶</a></p>
<ul class="toc compact ulEmpty">
<li class="toc compact ulEmpty" id="section-toc.1-1.1.2.1">
<p id="section-toc.1-1.1.2.1.1" class="keepWithNext"><a href="#section-1.1" class="xref">1.1</a>. <a href="#name-prior-versions-of-http" class="xref">Prior versions of HTTP</a><a href="#section-toc.1-1.1.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.1.2.2">
<p id="section-toc.1-1.1.2.2.1" class="keepWithNext"><a href="#section-1.2" class="xref">1.2</a>. <a href="#name-delegation-to-quic" class="xref">Delegation to QUIC</a><a href="#section-toc.1-1.1.2.2.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.2">
<p id="section-toc.1-1.2.1"><a href="#section-2" class="xref">2</a>. <a href="#name-http-3-protocol-overview" class="xref">HTTP/3 Protocol Overview</a><a href="#section-toc.1-1.2.1" class="pilcrow">¶</a></p>
<ul class="toc compact ulEmpty">
<li class="toc compact ulEmpty" id="section-toc.1-1.2.2.1">
<p id="section-toc.1-1.2.2.1.1"><a href="#section-2.1" class="xref">2.1</a>. <a href="#name-document-organization" class="xref">Document Organization</a><a href="#section-toc.1-1.2.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.2.2.2">
<p id="section-toc.1-1.2.2.2.1"><a href="#section-2.2" class="xref">2.2</a>. <a href="#name-conventions-and-terminology" class="xref">Conventions and Terminology</a><a href="#section-toc.1-1.2.2.2.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.3">
<p id="section-toc.1-1.3.1"><a href="#section-3" class="xref">3</a>. <a href="#name-connection-setup-and-manage" class="xref">Connection Setup and Management</a><a href="#section-toc.1-1.3.1" class="pilcrow">¶</a></p>
<ul class="toc compact ulEmpty">
<li class="toc compact ulEmpty" id="section-toc.1-1.3.2.1">
<p id="section-toc.1-1.3.2.1.1"><a href="#section-3.1" class="xref">3.1</a>. <a href="#name-discovering-an-http-3-endpo" class="xref">Discovering an HTTP/3 Endpoint</a><a href="#section-toc.1-1.3.2.1.1" class="pilcrow">¶</a></p>
<ul class="toc compact ulEmpty">
<li class="toc compact ulEmpty" id="section-toc.1-1.3.2.1.2.1">
<p id="section-toc.1-1.3.2.1.2.1.1"><a href="#section-3.1.1" class="xref">3.1.1</a>. <a href="#name-http-alternative-services" class="xref">HTTP Alternative Services</a><a href="#section-toc.1-1.3.2.1.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.3.2.1.2.2">
<p id="section-toc.1-1.3.2.1.2.2.1"><a href="#section-3.1.2" class="xref">3.1.2</a>. <a href="#name-other-schemes" class="xref">Other Schemes</a><a href="#section-toc.1-1.3.2.1.2.2.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.3.2.2">
<p id="section-toc.1-1.3.2.2.1"><a href="#section-3.2" class="xref">3.2</a>. <a href="#name-connection-establishment" class="xref">Connection Establishment</a><a href="#section-toc.1-1.3.2.2.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.3.2.3">
<p id="section-toc.1-1.3.2.3.1"><a href="#section-3.3" class="xref">3.3</a>. <a href="#name-connection-reuse" class="xref">Connection Reuse</a><a href="#section-toc.1-1.3.2.3.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.4">
<p id="section-toc.1-1.4.1"><a href="#section-4" class="xref">4</a>. <a href="#name-http-request-lifecycle" class="xref">HTTP Request Lifecycle</a><a href="#section-toc.1-1.4.1" class="pilcrow">¶</a></p>
<ul class="toc compact ulEmpty">
<li class="toc compact ulEmpty" id="section-toc.1-1.4.2.1">
<p id="section-toc.1-1.4.2.1.1"><a href="#section-4.1" class="xref">4.1</a>. <a href="#name-http-message-exchanges" class="xref">HTTP Message Exchanges</a><a href="#section-toc.1-1.4.2.1.1" class="pilcrow">¶</a></p>
<ul class="toc compact ulEmpty">
<li class="toc compact ulEmpty" id="section-toc.1-1.4.2.1.2.1">
<p id="section-toc.1-1.4.2.1.2.1.1"><a href="#section-4.1.1" class="xref">4.1.1</a>. <a href="#name-field-formatting-and-compre" class="xref">Field Formatting and Compression</a><a href="#section-toc.1-1.4.2.1.2.1.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.4.2.1.2.2">
<p id="section-toc.1-1.4.2.1.2.2.1"><a href="#section-4.1.2" class="xref">4.1.2</a>. <a href="#name-request-cancellation-and-re" class="xref">Request Cancellation and Rejection</a><a href="#section-toc.1-1.4.2.1.2.2.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.4.2.1.2.3">
<p id="section-toc.1-1.4.2.1.2.3.1"><a href="#section-4.1.3" class="xref">4.1.3</a>. <a href="#name-malformed-requests-and-resp" class="xref">Malformed Requests and Responses</a><a href="#section-toc.1-1.4.2.1.2.3.1" class="pilcrow">¶</a></p>
</li>
</ul>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.4.2.2">
<p id="section-toc.1-1.4.2.2.1"><a href="#section-4.2" class="xref">4.2</a>. <a href="#name-the-connect-method" class="xref">The CONNECT Method</a><a href="#section-toc.1-1.4.2.2.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.4.2.3">
<p id="section-toc.1-1.4.2.3.1"><a href="#section-4.3" class="xref">4.3</a>. <a href="#name-http-upgrade" class="xref">HTTP Upgrade</a><a href="#section-toc.1-1.4.2.3.1" class="pilcrow">¶</a></p>
</li>
<li class="toc compact ulEmpty" id="section-toc.1-1.4.2.4">