The Proxy-Status HTTP Response Header Field
draft-ietf-httpbis-proxy-status-04

Document Type Active Internet-Draft (httpbis WG)
Authors Mark Nottingham  , Piotr Sikora 
Last updated 2021-02-09
Replaces draft-nottingham-proxy-status
Stream Internent Engineering Task Force (IETF)
Intended RFC status (None)
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Stream WG state WG Document (wg milestone: - Submit Proxy-Status ... )
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HTTP                                                       M. Nottingham
Internet-Draft                                                    Fastly
Intended status: Standards Track                               P. Sikora
Expires: 13 August 2021                                           Google
                                                         9 February 2021

              The Proxy-Status HTTP Response Header Field
                   draft-ietf-httpbis-proxy-status-04

Abstract

   This document defines the Proxy-Status HTTP field to convey the
   details of intermediary response handling, including generated
   errors.

Note to Readers

   _RFC EDITOR: please remove this section before publication_

   Discussion of this draft takes place on the HTTP working group
   mailing list (ietf-http-wg@w3.org), which is archived at
   https://lists.w3.org/Archives/Public/ietf-http-wg/
   (https://lists.w3.org/Archives/Public/ietf-http-wg/).

   Working Group information can be found at https://httpwg.org/
   (https://httpwg.org/); source code and issues list for this draft can
   be found at https://github.com/httpwg/http-extensions/labels/proxy-
   status (https://github.com/httpwg/http-extensions/labels/proxy-
   status).

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   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 https://datatracker.ietf.org/drafts/current/.

   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."

   This Internet-Draft will expire on 13 August 2021.

Nottingham & Sikora      Expires 13 August 2021                 [Page 1]
Internet-Draft                Proxy-Status                 February 2021

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
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   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   4
   2.  The Proxy-Status HTTP Field . . . . . . . . . . . . . . . . .   4
     2.1.  Proxy-Status Parameters . . . . . . . . . . . . . . . . .   5
       2.1.1.  error . . . . . . . . . . . . . . . . . . . . . . . .   5
       2.1.2.  next-hop  . . . . . . . . . . . . . . . . . . . . . .   6
       2.1.3.  next-protocol . . . . . . . . . . . . . . . . . . . .   7
       2.1.4.  received-status . . . . . . . . . . . . . . . . . . .   7
       2.1.5.  details . . . . . . . . . . . . . . . . . . . . . . .   7
     2.2.  Defining New Proxy-Status Parameters  . . . . . . . . . .   7
     2.3.  Proxy Error Types . . . . . . . . . . . . . . . . . . . .   8
       2.3.1.  DNS Timeout . . . . . . . . . . . . . . . . . . . . .   8
       2.3.2.  DNS Error . . . . . . . . . . . . . . . . . . . . . .   8
       2.3.3.  Destination Not Found . . . . . . . . . . . . . . . .   9
       2.3.4.  Destination Unavailable . . . . . . . . . . . . . . .   9
       2.3.5.  Destination IP Prohibited . . . . . . . . . . . . . .   9
       2.3.6.  Destination IP Unroutable . . . . . . . . . . . . . .  10
       2.3.7.  Connection Refused  . . . . . . . . . . . . . . . . .  10
       2.3.8.  Connection Terminated . . . . . . . . . . . . . . . .  10
       2.3.9.  Connection Timeout  . . . . . . . . . . . . . . . . .  10
       2.3.10. Connection Read Timeout . . . . . . . . . . . . . . .  11
       2.3.11. Connection Write Timeout  . . . . . . . . . . . . . .  11
       2.3.12. Connection Limit Reached  . . . . . . . . . . . . . .  11
       2.3.13. TLS Protocol Error  . . . . . . . . . . . . . . . . .  11
       2.3.14. TLS Certificate Error . . . . . . . . . . . . . . . .  12
       2.3.15. TLS Alert Received  . . . . . . . . . . . . . . . . .  12
       2.3.16. HTTP Request Error  . . . . . . . . . . . . . . . . .  13
       2.3.17. HTTP Request Denied . . . . . . . . . . . . . . . . .  13
       2.3.18. HTTP Incomplete Response  . . . . . . . . . . . . . .  13
       2.3.19. HTTP Response Header Section Too Large  . . . . . . .  14
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