Hi everybody,
Following my previous posts regarding my RewriteRule/Location/SetEnvIf
problem, a friend of mine suggested a neat solution, quite easy to apply.
The trick is to create, on the same machine, another vhost meant to
serve exclusively as a reverse proxy, and which will add the intended
header via the "LocationMatch" directive, working correctly in that case.
Here is my (stripped down) reverse proxy setting:
<VirtualHost 192.168.x.y:80>
ServerName my.server.name
<LocationMatch "/onlinestore/checkout.*">
Header add X-CheckingOut "checking-out"
</LocationMatch>
ProxyPass / http://my.server.name:8080/
ProxyPassReverse / http://my.server.name:8080/
</VirtualHost>
The initial vhost setting is then modified to listen on port 8080
instead of 80. Very classical reverse proxy setting, of course, but
quite useful to me, as this way the "Location" directives become useable
for what I wanted them to do.
There is still a little mystery though, regarding the REQUEST_URI
variable: if I try to print it in the headers via the following
statement (in my new reverse proxy vhost of course):
Header add X-Request-URI "%{REQUEST_URI}e"
The value is always "(null)".
However, if I do as follows:
RewriteEngine on
RewriteRule .* - [E=INFO_REQUEST_URI:%{REQUEST_URI}]
Header add X-Request-URI "%{INFO_REQUEST_URI}e"
It works perfectly ! The trick here is to use the side-effect of a
rewrite rule that does nothing at all, but set a new variable. That new
variable (INFO_REQUEST_URI) then becomes useable in the "Header"
statement, whereas the old one (REQUEST_URI) is not.
If anybody has an explanation for this, I'd be glad to read it, but this
is in no way paramount.
Best regards to all.
Bruno
--
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