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sunnyman67_1367's avatar
sunnyman67_1367
Icon for Nimbostratus rankNimbostratus
Nov 03, 2013

URL rewrite through iRule

Hi Guys, i have one "Performance (HTTP)" virtual server on F5-1600 series, and i want to change the URL "http://www.abc.com" to "http://partner.abc.com/xyz". i have tried all below scripts :

 

1- when HTTP_REQUEST { if {([string tolower [HTTP::host]] equals "http://www.abc.com")}{ HTTP::header replace Host "http://partner.abc.com/xyz" } }

 

2- when HTTP_REQUEST { if { not ([HTTP::uri] starts_with "/xyz") } { HTTP::uri /xyz[HTTP::uri] } }

 

3- when HTTP_REQUEST { if {[HTTP::uri] equals {http://www.abc.com}} {HTTP::uri {http://partner.abc.com/xyz} } }

 

but i wasn't successful! can anyone help me how can i do this through iRule ?

 

application delivery
availability
BIG-IP Access Policy Manager (APM)
devops
iRules
management
performance
security
  • IheartF5_45022's avatar
    IheartF5_45022
    Nov 11, 2013

    Hi Sunnyman,

    This will work;

    if { [IP::addr [IP::client_addr] equals 1.1.1.1] || [IP::addr [IP::client_addr] equals 1.1.1.2} { 
    SNAT with 1.1.1.100
    snatpool VM_SNAT_POOL_1_1_1_100
} elseif { [IP::addr [IP::client_addr] equals 1.1.1.11] || [IP::addr [IP::client_addr] equals 1.1.1.12} { 
    SNAT with 1.1.1.100
    snatpool VM_SNAT_POOL_1_1_1_200
}

    But that's not a very scalable way of doing it if your list is going to grow. If it's going to grow then use an address datagroup, with values snatpool names, which you can use like this

    snatpool [class match -value [IP::remote_addr] equals dg_sunnyman_snatpools]

    or more correctly;

    set snatpool [class match -value [IP::remote_addr] equals dg_sunnyman_snatpools]
if {$snatpool ne "") {
    snatpool $snatpool
 }
  • sunnyman67_1367's avatar
    sunnyman67_1367
    Icon for Nimbostratus rankNimbostratus
    Nov 04, 2013

    Hi Joanna Thanks a lot for your solution, when i changed the the virtual server type to "Standard" and add "HTTP Profile", it works fine! But now i have another issue: now i want to do URL-rewrite to another port number on another server. For example when clinets want to see "abc.com/ukm", i want to change it to "1.1.1.1:8080/xyz". I've checked it with below script, but i didn't work. Am i wrong?

     if {[string tolower [HTTP::host]] starts_with "abc.com" && [string tolower [HTTP::path]] eq "/ukm"} {

HTTP::header replace Host "1.1.1.1:8080"
HTTP::uri "/xyz"

}
  • IheartF5_45022's avatar
    IheartF5_45022
    Icon for Nacreous rankNacreous
    Nov 04, 2013

    Hi - Yes you were very close to the correct solution in the first place.

     

    You need to change to "Standard" virtual server and apply an HTTP profile (and a oneconnect profile if you are using layer7 persistence, like 'cookie'). If you have any problems then delete and then recreate the virtual server.

     

  • sunnyman67_1367's avatar
    sunnyman67_1367
    Icon for Nimbostratus rankNimbostratus
    Nov 04, 2013

    Hi Joanna, Thanks a lot, I think your solution is almost the same of my first solution, but it's better to check it with yours. Meanwhile, i have one another problem: if i want to use "HTTP::Host" part of script on "Performance (HTTP)" virtual server mode, F5 tells me to use "HTTP Profile", but when i use "Standard" type of virtual server, F5 can not load balances the web traffic. So i should to use "Performance (HTTP)" mode. In this situation, is there any solution to do that through "Performance (HTTP)" mode? Thanks and Regards Joanna...

     

  • IheartF5_45022's avatar
    IheartF5_45022
    Icon for Nacreous rankNacreous
    Nov 04, 2013

    Hi this is the code you need in HTTP_REQUEST;-

     

    if {[string tolower [HTTP::Host]] starts_with "www.abc.com" && [HTTP::path] eq "/"} {
    HTTP::header replace Host "partner.abc.com"
    HTTP::uri "/xyz"
}

    In addition, you may need to remove the Performance HTTP profile as it only gives you v limited l7 iRule support.

     

    Jo

     

  • sunnyman67_1367's avatar
    sunnyman67_1367
    Icon for Nimbostratus rankNimbostratus
    Nov 03, 2013

    Meanwhile, i want to do that without any redirection, i just want to rewrite the url, thanks all...