https://bz.apache.org/bugzilla/show_bug.cgi?id=62496
Bug ID: 62496
Summary: Add possibility write remote user/auth type to
response header
Product: Tomcat 8
Version: 8.5.x-trunk
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: 1983-01...@gmx.net
Target Milestone: ----
I have a fairly simple usecase for an enhancement request from which a lot of
users can benefit.
Use case:
* Apache HTTPd (2.4.33) <====> Tomcat (8.5.30) via mod_proxy
* Apache logs with CustomLog ... common
* VirtualHost does not only proxy Tomcat, also hosts other unrelated apps
(.e.g, Subversion), so changing the log format is not an option
* Tomcat performs authentication
* Apache logs the requests, but remote_user column is empty. This is ugly and I
do not really want duplicate logging, i.e., on both sides or if both need to be
consistent.
Thanks to rjung@ and jim@ I worked out a solution which does a nice job.
httpd-tomcat.conf:
> <Location "/app">
> ProxyPreserveHost On
> ProxyPass ..
> ProxyPassReverse ..
> RequestHeader set X-Forwarded-Proto "https"
> Header note X-Remote-User REMOTE_USER
> LuaHookLog /usr/local/etc/apache24/register_remote_user.lua
> register_remote_user
> </Location>
register_remote_user.lua:
> require 'apache2'
>
> function register_remote_user(r)
> local remote_user = r.notes["REMOTE_USER"]
> if remote_user ~= nil then
> r.user = remote_user
> -- not implemented in mod_lua
> -- r.ap_auth_type = "SPNEGO"
> end
> return apache2.OK
> end
On the Tomcat side I have added:
> public class ResponseRemoteUserValve extends ValveBase {
>
> @Override
> public void invoke(Request request, Response response) throws
> IOException, ServletException {
> String remoteUser = request.getRemoteUser();
>
> if (remoteUser != null) {
> response.setHeader("X-Remote-User", remoteUser);
> }
>
> getNext().invoke(request, response);
> }
>
> }
Ideally for request#getAuthType() to X-Remote-AuthType too. I think this is
suitable for either AuthenticatorBase or RemoteIPValve.
Comments and ideas welcome!
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