Apache mapping and F5 Irules

If you are just doing a single rewrite, then data groups are overkill. This is probably as simple as it gets. If you need to have many redirects, then a data group might make a more readible iRule.

 

 

-Joe

Joe

 

 

I have many redirects. How do I contruct these statement using datagroups?

If all the URIS in a datagroup go to the SAME redirect, then you can use datagroups, but if all the redirects themselves are different I don't see a way to do it, you'll have to call them out individually.

That is, if your datagroup called "Region1" includes the following URI's:

/cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=A

/cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=B

/cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=C

/cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=D

and you want them ALL to be redirected to:

http://at-consume.tsl.da.com:2200/telus-cp-portal-web/jsp/productcatalogue/personal/index.jsp

then this should work:

when HTTP_REQUEST {
if { matchclass [HTTP::uri] equals $::Region1 } {
HTTP::redirect "http://at-consume.tsl.da.com:2200/telus-cp-portal-web/jsp/productcatalogue/personal/index.jsp"
  }
}

But if the A,B,C,D variants above need separate redirects, then datagroups won't help you.

Denny

Ahh, you learn something new every day.

You can use store mappings in a datagroup. You can store both strings space delimited in the datagroup and use the findclass method to extract them.

check out the findclass docs for some examples:

http://devcentral.f5.com/wiki/default.aspx/iRules.findclass

Click here

Let's say you have these four mappings defined in a string datagroup (this is the bigip.conf rendering of the data group)

class redirects {
  /cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=A http://redirect1.com/path1
  /cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=B http://redirect2.com/path2
  /cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=C http://redirect3.com/path3
  /cgi-ads/jsp/viewitem.do?category=personal_services_local&Region=D http://redirect4.com/path4
}

You could then use the following to lookup the first key and extract the second.

when HTTP_REQUEST {
  set my_redirect [findclass [HTTP::uri] $::redirects " "]
  if { $my_redirect ne "" } {
    HTTP::redirect $my_redirect
  }
}

Keep in mind that the findclass command is not case sensitive so if you need to worry about both upper and lower cases in requests, lowercase the strings in the datagroup and use the string tolower command on the HTTP::uri variable.

-Joe

You can use the datagroups for multiple URI and redirects:

class Region1 {

"URI1 mapped_redirect_URL1"

"URI2 mapped_redirect_URL2"

"URI3 mapped_redirect_URL3"

"URI4 mapped_redirect_URL4"

}

when HTTP_REQUEST {
  if { matchclass [string tolower [HTTP::uri]] equals $::Region1 } {
    HTTP::redirect [findclass [string tolower [HTTP::uri]] $::Region1 " "]
  }
}

Note that the class is defined outside of the iRule window on the datagroups tab.

HTH,

Looks like Joe beat me to it, and with an explanation to boot!

Excellent, thank you both for your examples!

 

 

Denny

Thank you all the solutions. I tried the examples you provided and I must say it is a very clean way to handle this mapping instead of the IF statements.

 

 

One more question:

 

 

My re-directs depend on cookie values. So if Region=A AND Type=Res then I need to use map to re-direct, else follow original URI. And if no cookies are present direct user to a set region apps so the appropriate cookies can be set.

 

 

Let me know if you have any suggestions.

 

Thanks