Put Host into a header for Forward Auth

[ekozan]

Hi all,

I just added possibility of forward the origin host to the as

Config example

[entryPoints.http.auth.forward]
address = "http://authtest/"
hostheader = "x-origin-host"

It's follow the design

Additional Headers
The AS might be interested in some of the original request informations such as:
Original Host - The target host address, eg api.example.com

All this information should be optional. The user must be allowed to define each header name.

Related to #2105

[ldez]

Could you use the common header X-Forwarded-Host as default header value.

[ldez]

You can simplify like that:

// Forward authentication
type Forward struct {
	Address         string           `description:"Authentication server address"`
	TLS             *ClientTLS       `description:"Enable TLS support"`
	HostHeader      string           `description:"Header name to put the forwarded host"`
}

[ekozan]

done.

[ldez]

@ekozan After discussion with the team, we believe that this PR should go in version 1.4.

Can you change the root branch of PR and rebase on branch 1.4 ?
Ask me if yo need help.

[ldez]

After the rebase you will need to add some documentation https://github.com/containous/traefik/blob/v1.4/docs/configuration/entrypoints.md#forward-authentication

[ekozan]

done. :)

[ldez]

could you add some documentation https://github.com/containous/traefik/blob/v1.4/docs/configuration/entrypoints.md#forward-authentication

[ekozan]

Done, I'm not really good for write doc :P
let me know if it's not good enough

[ldez]

Thanks 👍

LGTM

I think to another way, more conventional

[juliens]

LGTM

[nmengin]

LGTM 👏

[emilevauge]

Hey @ekozan,
Thanks a lot for this contribution ❤️
After digging into this, it appears that a bigger fix is necessary and we decided to do it ourselves.
I hope you don't mind if we close this one in favor of the new one :) OK for you ?
Thanks again !

[ekozan]

:) okay

[magnock]

Hello guys, anyone can help with using [entryPoints.http.auth.forward] in [entryPoints.https] ?
How to forward authentication when using HTTPS ??
Thx.