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Christopher Faulet 34b18e4391 BUG/MINOR: http-htx: Don't return error if authority is updated without changes 
When an Host header is updated, the autority part, if any, is also updated to
keep the both syncrhonized. But, when the update is performed while there is no
change, a failure is reported while, in reality, no update is necessary. This
bug was introduced by the commit d7b7a1ce5 ("MEDIUM: http-htx: Keep the Host
header and the request start-line synchronized").

This commit was pushed in the 2.1. But on this version, the bug is hidden
because rewrite errors are silently ignored. And because it happens when there
is no change, if the rewrite fails, noone notices it. But since the 2.2, rewrite
errors are now fatals by default. So when the bug is hit, a 500 error is
returned to the client. Without this fix, a workaround is to disable the strict
rewriting mode (see the "strict-mode" HTTP rule).

The following HTTP rule is a good way to reproduce the bug if a request with an
authority is received. In HTT2, it is pretty common.

    acl host_header_exists req.hdr(host) -m found
    http-request set-header host %[req.hdr(host)] if host_header_exists

This patch must be backported to 2.1 and everywhere the commit d7b7a1ce5 is
backported. It should fix the issue #494.
2020-02-18 11:19:57 +01:00
.github BUILD: enable ERR=1 in github cygwin builds 2020-02-15 16:32:38 +01:00
contrib CONTRIB: debug: also support reading values from stdin 2020-02-06 18:30:07 +01:00
doc MINOR: sample: regsub now supports backreferences 2020-02-16 19:48:54 +01:00
ebtree BUILD: ebtree: make eb_is_empty() and eb_is_dup() take a const 2019-10-02 15:24:19 +02:00
examples CLEANUP: removed obsolete examples an move a few to better places 2019-06-15 21:25:06 +02:00
include MINOR: http-htx: Add a function to retrieve the headers size of an HTX message 2020-02-18 11:19:57 +01:00
reg-tests REGTESTS: Add a reg test for http-after-response rulesets 2020-02-06 15:13:04 +01:00
scripts SCRIPTS: announce-release: use mutt -H instead of -i to include the draft 2020-02-15 15:24:28 +01:00
src BUG/MINOR: http-htx: Don't return error if authority is updated without changes 2020-02-18 11:19:57 +01:00
tests TESTS: Add a stress-test for mt_lists. 2019-09-23 18:16:08 +02:00
.cirrus.yml BUILD: cirrus-ci: add ERR=1 to freebsd builds 2020-02-11 10:03:06 +01:00
.gitignore DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
.travis.yml BUILD: travis-ci: harden builds, add ERR=1 (warning ought to be errors) 2020-02-12 15:42:44 +01:00
BRANCHES DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
CHANGELOG [RELEASE] Released version 2.2-dev2 2020-02-07 04:12:19 +01:00
CONTRIBUTING DOC: improve the wording in CONTRIBUTING about how to document a bug fix 2019-07-26 15:46:21 +02:00
INSTALL MINOR: build: add aix72-gcc build TARGET and power{8,9} CPUs 2020-02-12 15:37:13 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS DOC: wurfl: added point of contact in MAINTAINERS file 2019-04-23 11:00:23 +02:00
Makefile MINOR: build: add aix72-gcc build TARGET and power{8,9} CPUs 2020-02-12 15:37:13 +01:00
README DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
ROADMAP DOC: update the outdated ROADMAP file 2019-06-15 21:59:54 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 2.2-dev2 2020-02-07 04:12:19 +01:00
VERSION [RELEASE] Released version 2.2-dev2 2020-02-07 04:12:19 +01:00

README 

The HAProxy documentation has been split into a number of different files for
ease of use.

Please refer to the following files depending on what you're looking for :

  - INSTALL for instructions on how to build and install HAProxy
  - BRANCHES to understand the project's life cycle and what version to use
  - LICENSE for the project's license
  - CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory :

  - doc/intro.txt for a quick introduction on HAProxy
  - doc/configuration.txt for the configuration's reference manual
  - doc/lua.txt for the Lua's reference manual
  - doc/SPOE.txt for how to use the SPOE engine
  - doc/network-namespaces.txt for how to use network namespaces under Linux
  - doc/management.txt for the management guide
  - doc/regression-testing.txt for how to use the regression testing suite
  - doc/peers.txt for the peers protocol reference
  - doc/coding-style.txt for how to adopt HAProxy's coding style
  - doc/internals for developer-specific documentation (not all up to date)