draft-ietf-httpapi-link-hint-04.unpg.txt   draft-ietf-httpapi-link-hint-latest.txt 
Network Working Group M. Nottingham Network Working Group M. Nottingham
Internet-Draft August 10, 2025 Internet-Draft October 13, 2025
Intended status: Standards Track Intended status: Standards Track
Expires: February 11, 2026 Expires: April 16, 2026
HTTP Link Hints HTTP Link Hints
draft-ietf-httpapi-link-hint-04 draft-ietf-httpapi-link-hint-latest
Abstract Abstract
This memo specifies "HTTP Link Hints", a mechanism for annotating Web This memo specifies "HTTP Link Hints", a mechanism for annotating Web
links to HTTP(S) resources with information that otherwise might be links to HTTP(S) resources with information that otherwise might be
discovered by interacting with them. discovered by interacting with them.
About This Document About This Document
This note is to be removed before publishing as an RFC. This note is to be removed before publishing as an RFC.
skipping to change at line 48 skipping to change at page 2, line 4
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This Internet-Draft will expire on April 16, 2026.
This Internet-Draft will expire on February 11, 2026.
Copyright Notice Copyright Notice
Copyright (c) 2025 IETF Trust and the persons identified as the Copyright (c) 2025 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
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Table of Contents Table of Contents
1. Introduction 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Notational Conventions 1.1. Notational Conventions . . . . . . . . . . . . . . . . . 3
2. HTTP Link Hints 2. HTTP Link Hints . . . . . . . . . . . . . . . . . . . . . . . 4
3. Pre-Defined HTTP Link Hints 3. Pre-Defined HTTP Link Hints . . . . . . . . . . . . . . . . . 4
3.1. allow 3.1. allow . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2. formats 3.2. formats . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3. accept-post 3.3. accept-post . . . . . . . . . . . . . . . . . . . . . . . 5
3.4. accept-patch 3.4. accept-patch . . . . . . . . . . . . . . . . . . . . . . 5
3.5. accept-query 3.5. accept-query . . . . . . . . . . . . . . . . . . . . . . 5
3.6. accept-ranges 3.6. accept-ranges . . . . . . . . . . . . . . . . . . . . . . 6
3.7. accept-prefer 3.7. accept-prefer . . . . . . . . . . . . . . . . . . . . . . 6
3.8. precondition-req 3.8. precondition-req . . . . . . . . . . . . . . . . . . . . 7
3.9. auth-schemes 3.9. auth-schemes . . . . . . . . . . . . . . . . . . . . . . 7
3.10. auth-realms 3.10. auth-realms . . . . . . . . . . . . . . . . . . . . . . . 7
3.11. status 3.11. status . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Security Considerations 4. Security Considerations . . . . . . . . . . . . . . . . . . . 8
5. IANA Considerations 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
5.1. HTTP Link Hint Registry 5.1. HTTP Link Hint Registry . . . . . . . . . . . . . . . . . 8
6. References 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1. Normative References 6.1. Normative References . . . . . . . . . . . . . . . . . . 9
6.2. Informative References 6.2. Informative References . . . . . . . . . . . . . . . . . 10
Appendix A. Acknowledgements Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 10
Author's Address Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 11
1. Introduction 1. Introduction
HTTP [HTTP] clients can discover a variety of information about a HTTP [HTTP] clients can discover a variety of information about a
resource by interacting with it. For example, the methods supported resource by interacting with it. For example, the methods supported
by a resource can be learned by examining the Allow header field in by a resource can be learned by examining the Allow header field in
responses from it, and the need for authentication is conveyed with a responses from it, and the need for authentication is conveyed with a
401 (Authentication Required) status code. 401 (Authentication Required) status code.
Often, it can be beneficial to know this information before Often, it can be beneficial to know this information before
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