mod_setenv: Lighttpd Send Custom Headers

How do I add a header to the HTTP request that was received from the client under Lighttpd web server?

You can use the setenv module (mod_setenv) which allows influencing the environment external applications are spawned in and the response headers the server sends to the clients. Edit lighttpd.conf, enter:
# vi /etc/lighttpd/lighttpd.conf
Add mod_setenv:

server.modules += ( "mod_setenv" )

Set X-proxy header:

setenv.add-response-header = ( "X-Proxy" => "www-02" )

Or sent server itself:

setenv.add-request-header = ( "X-Proxy" => server.name )

Save and close the file. Reload lighttpd:
# service lighttpd reload
To see headers, enter:
$ curl -I http://example.com/

References:

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.