Re: URL rewrite question

[Willy Tarreau]

Hi,

On Thu, Feb 04, 2010 at 10:31:03PM +0100, Holger Just wrote:
> On 2010-02-04 21:15, Sriram Chavali wrote:
> > I am trying to rewrite URLs using haproxy's reqirep directive. The url that 
> > I am trying to rewrite is of the pattern
> > /action/register?param1=foo&param2=bar&param3=baz
> > 
> > The URL that I want to be rewritten is 
> > /newaction?param1=foo&param2=bar&param3=baz on the condition that whenever 
> > param2=bar
> > 
> > The ordering of the query string parameters can be random, i.e param2 could 
> > be the 1st parameter or the last one. 
> 
> In Haproxy 1.3.x it is currently not possible to issue a reqirep on a
> conditional basis. This is however introduced in Haproxy 1.4-rc1. There
> you could solve your problem using something like this:
> 
> acl baz url_sub &param2=bar ?param2=bar
> reqirep ([^\ ]*)\ /action/register\?(.*)  \1\ /newaction\?\2  if baz

Well, since both entries are on the same line and param2 is
always after the string to match, you can still write it
without ACLs in 1.3 :

 reqrep ([^\ ]*)\ /action.register\?([^&]*&)*param2=bar(.*)  \1\ 
/newaction\?\2param2=bar\3

That way the regex will only match when "param2=bar" appears in one of
the parameters.

Willy