The Proxy-Status HTTP Header Field
draft-nottingham-proxy-status-00

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Last updated 2019-04-28 (latest revision 2019-02-19)
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Network Working Group                                      M. Nottingham
Internet-Draft                                                    Fastly
Intended status: Informational                                 P. Sikora
Expires: August 24, 2019                                          Google
                                                       February 20, 2019

                   The Proxy-Status HTTP Header Field
                    draft-nottingham-proxy-status-00

Abstract

   This document defines the Proxy-Status HTTP header field to convey
   the details of errors generated by HTTP intermediaries.

Note to Readers

   _RFC EDITOR: please remove this section before publication_

   The issues list for this draft can be found at
   https://github.com/mnot/I-D/labels/proxy-status [1].

   The most recent (often, unpublished) draft is at
   https://mnot.github.io/I-D/proxy-status/ [2].

   See also the draft's current status in the IETF datatracker, at
   https://datatracker.ietf.org/doc/draft-nottingham-proxy-status/ [3].

   Precursors that informed this work include (but are not limited to):

   o  https://docs.fastly.com/guides/debugging/common-503-errors

   o  https://support.cloudflare.com/hc/en-us/sections/200820298-Error-
      Pages

   o  https://cloud.google.com/load-balancing/docs/https/https-logging-
      monitoring

   o  https://docs.google.com/document/
      d/1fMEK80KlpHcL4CwhniOupgQu4MDsxK4y4dKhthjjCMA

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

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   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 August 24, 2019.

Copyright Notice

   Copyright (c) 2019 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 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   4
   2.  The Proxy-Status HTTP Header Field  . . . . . . . . . . . . .   4
     2.1.  Generic Proxy Status Parameters . . . . . . . . . . . . .   5
   3.  Proxy Status Types  . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  DNS Timeout . . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  DNS Error . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.3.  Destination Not Found . . . . . . . . . . . . . . . . . .   6
     3.4.  Destination Unavailable . . . . . . . . . . . . . . . . .   7
     3.5.  Destination IP Prohibited . . . . . . . . . . . . . . . .   7
     3.6.  Destination IP Unroutable . . . . . . . . . . . . . . . .   7
     3.7.  Connection Refused  . . . . . . . . . . . . . . . . . . .   7
     3.8.  Connection Terminated . . . . . . . . . . . . . . . . . .   8
     3.9.  Connection Timeout  . . . . . . . . . . . . . . . . . . .   8
     3.10. Connection Read Timeout . . . . . . . . . . . . . . . . .   8
     3.11. Connection Write Timeout  . . . . . . . . . . . . . . . .   8
     3.12. Connection Limit Reached  . . . . . . . . . . . . . . . .   9
     3.13. HTTP Response Status  . . . . . . . . . . . . . . . . . .   9
     3.14. HTTP Incomplete Response  . . . . . . . . . . . . . . . .   9
     3.15. HTTP Protocol Error . . . . . . . . . . . . . . . . . . .   9
     3.16. HTTP Response Header Block Too Large  . . . . . . . . . .  10

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     3.17. HTTP Response Header Too Large  . . . . . . . . . . . . .  10
     3.18. HTTP Response Body Too Large  . . . . . . . . . . . . . .  10
     3.19. HTTP Response Transfer-Coding Error . . . . . . . . . . .  11
     3.20. HTTP Response Content-Coding Error  . . . . . . . . . . .  11
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