Hi Maya,
Maybe try this:
http-request set-header Host context_path.ms.example.com if { path_beg
/context_path } { hdr(Host) -i example.com }
________________________________
From: Maya Lena Ayleen Scheu <maya.sc...@check24.de>
Sent: Wednesday, August 11, 2021 9:58 PM
To: haproxy@formilux.org <haproxy@formilux.org>
Subject: Question about available fetch-methods for http-request
Hi there,
I have some questions regarding Haproxy Configuration in Version HA-Proxy
version 2.0.23, which is not clear by reading the official documentation. I
hope you would have some ideas how this could be solved.
What I wish to accomplish:
A frontend application is called by an url with a context path in it.
Haproxy should set a Header in the backend section with `http-request
set-header Host` whereas the set Host contains the context_path found in the
url-path. I try to make it clear with an example:
The called url looks like: `https://example.com/context_path/abc/etc`
Out of this url I would need to set the following Host Header:
`context_path.ms.example.com`, while the path remains `/context_path/abc/etc`
While I find many fetch-examples for ACLs, I had to learn that most of them
don’t work on `http-request set-header or set-env`. I tried to use `path_beg`
or `path_reg`, which parses with errors, that the fetch method is unknown.
So something like this doesn’t work:
`http-request set-header Host
%[path_reg(...)].ms.example.domain.com<http://ms.example.domain.com> if
host_example`
or this:
`http-request set-var(req.url_context) path_beg,lower if host_example`
Question:
I am certain that this should somehow be possible, as I found even solutions to
set variables or Headers by urlp, cookies, etc.
What would be the explanation, why fetch methods like path_beg are not
available in this context? And how to work around it?
Thank you in advance and best regards,
Maya Scheu
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