tree ed2f51dec65dc9da44280ea87cb3a90877995e36
parent 2086365f51b48e572f1df46739b715c2b9a356db
author Baptiste Assmann <bedis9@gmail.com> 1579181662 +0100
committer Willy Tarreau <w@1wt.eu> 1579675476 +0100
encoding latin1

BUG/MINOR: http_act: don't check capture id in backend

A wrong behavior was introduced by
e9544935e86278dfa3d49fb4b97b860774730625, leading to preventing loading
any configuration where a capture slot id is used in a backend.
IE, the configuration below does not parse:

  frontend f
   bind *:80
   declare capture request len 32
   default_backend webserver

  backend webserver
   http-request capture req.hdr(Host) id 1

The point is that such type of configuration is valid and should run.

This patch enforces the check of capture slot id only if the action rule
is configured in a frontend.
The point is that at configuration parsing time, it is impossible to
check which frontend could point to this backend (furthermore if we use
dynamic backend name resolution at runtime).

The documentation has been updated to warn the user to ensure that
relevant frontends have required declaration when such rule has to be
used in a backend.
If no capture slot can be found, then the action will just not be
executed and HAProxy will process the next one in the list, as expected.

This should be backported to all supported branches (bug created as part
of a bug fix introduced into 1.7 and backported to 1.6).