tree 470c202e06ffce22453af32ede9a65181f784efb
parent 9ded834adc79599cf2b9d324001798629ef9cffc
author Aurelien DARRAGON <adarragon@haproxy.com> 1673014009 +0100
committer Christopher Faulet <cfaulet@haproxy.com> 1674829139 +0100

MINOR: http_ext/7239: warn the user when fetch is not available

http option forwarded (rfc7239) supports sample expressions when
configuring 'host', 'for' and 'by' parameters.

However, since we are in a http-backend-only context, right after http
header is processed, we have a limited resolution scope for the sample
expression provided by the user.

To prevent any confusion, a warning is emitted when parsing the option
if the user relies on a sample expression (more precisely a fetch) which
would yield unexpected results at runtime when processing the option.