Network Working Group L. Pardue
Internet-Draft April 1, 2018
Intended status: Informational
Expires: October 2, 2018
HTTP Server *ush
draft-pardue-server-ush-00
Abstract
This document defines a suite of HTTP semantic extensions, named the
*ush family, that propels HTTP towards new application use cases.
HTTP/QUIC clients opt-in to features via an HTTP setting.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on September 23, 2018.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Notational Conventions . . . . . . . . . . . . . . . . . 3
2. The SETTINGS_ENABLE_CUSH Parameter . . . . . . . . . . . . . 3
3. The SETTINGS_ENABLE_DUSH Parameter . . . . . . . . . . . . . 3
4. The SETTINGS_ENABLE_GUSH Parameter . . . . . . . . . . . . . 3
5. The SETTINGS_ENABLE_HUSH Parameter . . . . . . . . . . . . . 4
6. The SETTINGS_ENABLE_KUSH Parameter . . . . . . . . . . . . . 4
7. The SETTINGS_ENABLE_LUSH Parameter . . . . . . . . . . . . . 4
8. The SETTINGS_ENABLE_MUSH Parameter . . . . . . . . . . . . . 4
9. The SETTINGS_ENABLE_RUSH Parameter . . . . . . . . . . . . . 5
10. The SETTINGS_ENABLE_TUSH Parameter . . . . . . . . . . . . . 5
11. The SETTINGS_ENABLE_BLUSH Parameter . . . . . . . . . . . . . 5
12. The SETTINGS_ENABLE_FLUSH Parameter . . . . . . . . . . . . . 5
13. The SETTINGS_ENABLE_PLUSH Parameter . . . . . . . . . . . . . 6
14. The SETTINGS_ENABLE_SLUSH Parameter . . . . . . . . . . . . . 6
15. The SETTINGS_ENABLE_SMUSH Parameter . . . . . . . . . . . . . 6
16. Security Considerations . . . . . . . . . . . . . . . . . . . 6
17. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
17.1. Registration of SETTINGS_ENABLE_CUSH parameter . . . . . 6
17.2. Registration of SETTINGS_ENABLE_DUSH parameter . . . . . 7
17.3. Registration of SETTINGS_ENABLE_GUSH parameter . . . . . 7
17.4. Registration of SETTINGS_ENABLE_HUSH parameter . . . . . 7
17.5. Registration of SETTINGS_ENABLE_KUSH parameter . . . . . 7
17.6. Registration of SETTINGS_ENABLE_LUSH parameter . . . . . 8
17.7. Registration of SETTINGS_ENABLE_MUSH parameter . . . . . 8
17.8. Registration of SETTINGS_ENABLE_RUSH parameter . . . . . 8
17.9. Registration of SETTINGS_ENABLE_TUSH parameter . . . . . 8
17.10. Registration of SETTINGS_ENABLE_BLUSH parameter . . . . 9
17.11. Registration of SETTINGS_ENABLE_FLUSH parameter . . . . 9
17.12. Registration of SETTINGS_ENABLE_PLUSH parameter . . . . 9
17.13. Registration of SETTINGS_ENABLE_SLUSH parameter . . . . 10
17.14. Registration of SETTINGS_ENABLE_SMUSH parameter . . . . 10
18. Normative References . . . . . . . . . . . . . . . . . . . . 10
Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 11
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 11
1. Introduction
HTTP server push is a feature of HTTP/2 [RFC7540] and HTTP/QUIC
[QUIC-HTTP] that allows a server to pre-emptively send HTTP resources
to a client in association with a previous client-initiated request.
Server push broke ground for new HTTP semantics that offer new HTTP
application use cases; this has kicked the door down for additional
semantics.
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Much of the success of HTTP Server Push can be attributed to its
syllable count and structure. The phrase rolls off the tongue with
clear and concise meaning. To capitalise on this, the document
defines a suite of HTTP semantic extensions with identical syllabic
structure: the *ush family (pronounced aster-ush). Members of the
*ush family enhance Server Push in various ways.
For each member of the *ush family, this document adds a new HTTP/2
SETTINGS Parameter (to those defined by [RFC7540] Section X.Y.Z), and
a new HTTP/QUIC SETTINGS Parameter to those defined by [QUIC-HTTP]
Section 5.2.5.
1.1. Notational Conventions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
2. The SETTINGS_ENABLE_CUSH Parameter
The new parameter is SETTINGS_ENABLE_CUSH (type = 0xfab01). This
setting can be used to enable Server Cush, a more luxurious (cushy)
form of Server Push. The value of the parameter is an integer that
MUST be 0 or 1. Any value other than 0 or 1 MUST be treated as a
connection error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "cattle class" Server
Push is preferred.
3. The SETTINGS_ENABLE_DUSH Parameter
The new parameter is SETTINGS_ENABLE_DUSH (type = 0xfab02). This
setting can be used to enable Server Dush, a more violent form of
Server Push. The value of the parameter is an integer that MUST be 0
or 1. Any value other than 0 or 1 MUST be treated as a connection
error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "care bear" Server Push
is preferred.
4. The SETTINGS_ENABLE_GUSH Parameter
The new parameter is SETTINGS_ENABLE_GUSH (type = 0xfab03). This
setting can be used to enable Server Gush, a mode of Server Push that
supports sudden overflows. The value of the parameter is an integer
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that MUST be 0 or 1. Any value other than 0 or 1 MUST be treated as
a connection error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "emotionally reserved"
Server Push is preferred.
5. The SETTINGS_ENABLE_HUSH Parameter
The new parameter is SETTINGS_ENABLE_HUSH (type = 0xfab04). This
setting can be used to enable Server Hush, semantically equivalent to
SETTINGS_ENABLE_PUSH but more polite. The value of the parameter is
an integer that MUST be 0 or 1. Any value other than 0 or 1 MUST be
treated as a connection error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that Server Push is not
permitted.
6. The SETTINGS_ENABLE_KUSH Parameter
The new parameter is SETTINGS_ENABLE_KUSH (type = 0xfab05). This
setting can be used to enable Server Kush, a more mellow form of
Server Push whose legality varies across territories. The value of
the parameter is an integer that MUST be 0 or 1. Any value other
than 0 or 1 MUST be treated as a connection error of type
PROTOCOL_ERROR.
The initial value is 0, which indicates that "legal" Server Push is
preferred.
7. The SETTINGS_ENABLE_LUSH Parameter
The new parameter is SETTINGS_ENABLE_LUSH (type = 0xfab06). This
setting can be used to enable Server Lush, which permits only the
push of resources related to vegetation. The value of the parameter
is an integer that MUST be 0 or 1. Any value other than 0 or 1 MUST
be treated as a connection error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "eco-broad" Server Push
is preferred.
8. The SETTINGS_ENABLE_MUSH Parameter
The new parameter is SETTINGS_ENABLE_MUSH (type = 0xfab07). Mush has
negative connotations so this setting is reserved and MUST NOT be
used.
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9. The SETTINGS_ENABLE_RUSH Parameter
The new parameter is SETTINGS_ENABLE_RUSH (type = 0xfab08). This
setting can be used to enable Server Rush, a mode that enables a
server to push resources more quickly. The value of the parameter is
an integer that MUST be 0 or 1. Any value other than 0 or 1 MUST be
treated as a connection error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "lazy" Server Rush is
preferred.
10. The SETTINGS_ENABLE_TUSH Parameter
The new parameter is SETTINGS_ENABLE_TUSH (type = 0xfab09). This
setting can be used to enable Server Tush, a mode where the client
will express dissaproval if the server takes too long to fulfill push
promises. The value of the parameter is an integer that MUST be 0 or
1. Any value other than 0 or 1 MUST be treated as a connection error
of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "polite to the point"
Server Push is preferred.
11. The SETTINGS_ENABLE_BLUSH Parameter
The new parameter is SETTINGS_ENABLE_BLUSH (type = 0xfab0a). This
setting can be used to enable Server Blush, a mode where the server
should feel extra shame if it pushes resources that the client did
not want. The value of the parameter is an integer that MUST be 0 or
1. Any value other than 0 or 1 MUST be treated as a connection error
of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "shameless" Server Push
is preferred.
12. The SETTINGS_ENABLE_FLUSH Parameter
The new parameter is SETTINGS_ENABLE_FLUSH (type = 0xfab0b). This
setting can be used to enable Server Flush, a mode that respects the
Coriolis effect across Northen and Southern hemispheres. The value
of the parameter is an integer that MUST be 0 or 1. Any value other
than 0 or 1 MUST be treated as a connection error of type
PROTOCOL_ERROR.
The initial value is 0, which indicates that "universal frame of
reference" Server Push is preferred.
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13. The SETTINGS_ENABLE_PLUSH Parameter
The new parameter is SETTINGS_ENABLE_PLUSH (type = 0xfab0c). This
setting is a synonym of SETTINGS_ENABLE_CUSH (Section 2).
14. The SETTINGS_ENABLE_SLUSH Parameter
The new parameter is SETTINGS_ENABLE_SLUSH (type = 0xfab0d). This
setting can be used to enable Server Slush, a mode that is overly
sentimental. This is most appropriate when re-establishing
connections to servers. The value of the parameter is an integer
that MUST be 0 or 1. Any value other than 0 or 1 MUST be treated as
a connection error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "cold hearted" Server
Push is preferred.
15. The SETTINGS_ENABLE_SMUSH Parameter
The new parameter is SETTINGS_ENABLE_SMUSH (type = 0xfab0e). This
setting can be used to enable Server Mush, a logical union between
SETTINGS_ENABLE_GUSH and SETTINGS_ENABLE_SLUSH. The value of the
parameter is an integer that MUST be 0 or 1. Any value other than 0
or 1 MUST be treated as a connection error of type PROTOCOL_ERROR.
The initial value is 0, which indicates that "emotionally reserved
and cold hearted" Server Push is preferred.
16. Security Considerations
There are no additional consideration beyond those presented in
[RFC7540] and [QUIC-HTTP].
17. IANA Considerations
17.1. Registration of SETTINGS_ENABLE_CUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_CUSH
Code: 0xfab01
Specification: This document
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17.2. Registration of SETTINGS_ENABLE_DUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_DUSH
Code: 0xfab02
Specification: This document
17.3. Registration of SETTINGS_ENABLE_GUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_GUSH
Code: 0xfab03
Specification: This document
17.4. Registration of SETTINGS_ENABLE_HUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_HUSH
Code: 0xfab04
Specification: This document
17.5. Registration of SETTINGS_ENABLE_KUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_KUSH
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Code: 0xfab05
Specification: This document
17.6. Registration of SETTINGS_ENABLE_LUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_LUSH
Code: 0xfab06
Specification: This document
17.7. Registration of SETTINGS_ENABLE_MUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_MUSH
Code: 0xfab07
Specification: This document
17.8. Registration of SETTINGS_ENABLE_RUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_RUSH
Code: 0xfab08
Specification: This document
17.9. Registration of SETTINGS_ENABLE_TUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
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for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_TUSH
Code: 0xfab09
Specification: This document
17.10. Registration of SETTINGS_ENABLE_BLUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_BLUSH
Code: 0xfab0a
Specification: This document
17.11. Registration of SETTINGS_ENABLE_FLUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_FLUSH
Code: 0xfab0b
Specification: This document
17.12. Registration of SETTINGS_ENABLE_PLUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_PLUSH
Code: 0xfab0c
Specification: This document
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17.13. Registration of SETTINGS_ENABLE_SLUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_SLUSH
Code: 0xfab0d
Specification: This document
17.14. Registration of SETTINGS_ENABLE_SMUSH parameter
This document establishes an entry for the HTTP/2 Settings Registry
that is established by [RFC7540]. This document establishes an entry
for the HTTP/QUIC Settings Registry that is established by
[QUIC-HTTP].
Name: SETTINGS_ENABLE_SMUSH
Code: 0xfab0e
Specification: This document
18. Normative References
[QUIC-HTTP]
Bishop, M., Ed., "Hypertext Transfer Protocol (HTTP) over
QUIC", draft-ietf-quic-http-08 (work in progress).
[QUIC-TRANSPORT]
Iyengar, J., Ed. and M. Thomson, Ed., "QUIC: A UDP-Based
Multiplexed and Secure Transport", draft-ietf-quic-
transport-08 (work in progress).
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, <https://www.rfc-
editor.org/info/rfc2119>.
[RFC7540] Belshe, M., Peon, R., and M. Thomson, Ed., "Hypertext
Transfer Protocol Version 2 (HTTP/2)", RFC 7540,
DOI 10.17487/RFC7540, May 2015, <https://www.rfc-
editor.org/info/rfc7540>.
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[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
Appendix A. Acknowledgements
The entire Internet community.
Author's Address
Lucas Pardue
Email: lucaspardue.24.7@gmail.com
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