ACE re-direct/re-write URL to a subpage of the VIP

bgfl-tech · ‎04-30-2009

Hi,

I'd like to re-direct/re-write the URL that a user is sent to when they go to a particular http VIP.

A present the process is handled by an Apache server that we are looking to remove from the backend and utilise the available functionality of the ACE.

When a user goes to "test1.sap.brm.pri" I would actually like them to go to "test1.sap.brm.pri/irj/portal" and NOT test1.sap.brm.pri/index.html which is what is currently happening (the real backend URL wanted being http://vex1ci.sap.brm.pri:56400/irj/portal).

I created the following action list:-

action-list type modify http test1.sap.brm.pri-REDIRECT-URL

header rewrite request Host header-value "test1.sap.brm.pri" replace "test1.sap.brm.pri/irj/portal"

which at first glance I though had done the trick but unfortunately /irj/portal is being inserted into all requests to URLs that start "test1.sap.brm.pri" and not JUST "test1.sap.brm.pri", i.e.

"test1.sap.brm.pri/sap/monitoring/SystemInfo" is automatically changed into "test1.sap.brm.pri/irj/portal/sap/monitoring/SystemInfo" which doesn't exist.

Is what I'm after possible?

thanks in advance

Matthew

Gilles Dufour · ‎05-06-2009

Matthew,

some theory first.

A url like http://mycompany.com/path/file is composed of a hostname : mycompany.com and a uri: /path/file

When this url is sent by a computer it is clear split in those 2 parts:

GET /path/file....

Host: mycompany.com

So, when you do a header rewrite to modify the host, all you do is change the line Host: ....

Clearly this won't work.

You have to

1/ create a class-map to match the url "/" and/or "/index.html"

2/ create a redirect serverfarm/rserver to point to the new url.

3/ create a policy-map type http loadbalance to link the url class-map with the redirect and to the link the class-default to your serverfarm

Hope this helps.

Gilles.