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jwhitepnv_12764's avatar
jwhitepnv_12764
Icon for Nimbostratus rankNimbostratus
Apr 12, 2005

Persist based on a portion of SID

I have an application that returns URLs that look like this:

 

https://www.xyz.com/ires/en-us/html/SignIn?sid=JSNd.fstR2gz5Y.6&return-to=HomePage

 

The ".6" at the end of the "sid=" string uniquely identifies the server. How do I create a rule to persist users with a .6 extention to a server with a specific ip address. For example all .6 URLs go to 10.10.10.6:80?

 

 

Thanks for your help.
application delivery
dev
devops
iRules
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Apr 13, 2005
    Assuming the sid=JSNd.fstR2gz5Y. is a static length before your Identifier of 6, and that the & is always the terminator, you can pull out the identifier and set it to a variable. Here's a start: 

    when HTTP_REQUEST { 
   if { [HTTP::cookie exists "persist_me"] } { 
     persist uie [HTTP::cookie "persist_me"] 
     } 
 } 
        
 when HTTP_RESPONSE { 
   set server_id [ findstr [HTTP::uri] "sid" 19 "&"] 
   You'll need logic here to compare the value of server_id 
   to the real server, and create new variable to insert into 
   cookie so when the HTTP_REQUEST is performed, no additional 
   processing will be required. 
   HTTP::cookie insert name persist_me value $server_id 
 }

    If you just want to make sure you are persisting to the server responding, it might be easier to persist by extracting the responding server's information: 

    when HTTP_REQUEST {  
   if { [HTTP::cookie exists "persist_me"] {  
     set cookie_contents [HTTP::cookie persist_me] 
     set poolid [lindex cookie_contents 0] 
     set serverid [lindex cookie_contents 1] 
     set portid [lindex cookie_contents 2] 
     use pool $poolid member $serverid $portid 
     } else { 
       use pool $poolid 
       }     
   }  
  
 when HTTP_RESPONSE {  
   HTTP::cookie insert name persist_me value [LB::server] 
   }

  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Apr 13, 2005
    The cookie in the HTTP_RESPONSE should be persist_me, not g2_cooks. Sorry.