[MINOR] add X-Original-To: header
I have attached a patch which will add on every http request a new
header 'X-Original-To'. If you have HAProxy running in transparent mode
with a big number of SQUID servers behind it, it is very nice to have
the original destination ip as a common header to make decisions based
on it.
The whole thing is configurable with a new option 'originalto'. I have
updated the sourcecode as well as the documentation. The 'haproxy-en.txt'
and 'haproxy-fr.txt' files are untouched, due to lack of my french
language knowledge. ;)
Also the patch adds this header for IPv4 only. I haven't any IPv6 test
environment running here and don't know if getsockopt() with SO_ORIGINAL_DST
will work on IPv6. If someone knows it and wants to test it I can modify
the diff. Feel free to ask me questions or things which should be changed. :)
--Maik
diff --git a/doc/architecture.txt b/doc/architecture.txt
index 7d80f1b..991b236 100644
--- a/doc/architecture.txt
+++ b/doc/architecture.txt
@@ -128,6 +128,15 @@
option httpclose
option forwardfor
+ - if the application needs to log the original destination IP, use the
+ "originalto" option which will add an "X-Original-To" header with the
+ original destination IP address. You must also use "httpclose" to ensure
+ that you will rewrite every requests and not only the first one of each
+ session :
+
+ option httpclose
+ option originalto
+
The web server will have to be configured to use this header instead.
For example, on apache, you can use LogFormat for this :