Forum Discussion

Altocumulus

Aug 12, 2021

http redirect with multiple condetion

Hello I am trying to redirect http request coming to my F5s to another path, i have a working iRule but the new requirement is, since my VIP has multiple A records, the developers do not know which ...

Nacreous

Aug 13, 2021

I'm assuming you want to send traffic for those 3 hosts to a pool with serverside rewrite and not a clientside redirect (Where URL would be changed and visible to client). So using pool is correct option.

But if traffic for all 3 hosts going to same pool and also there is not other custom requirement for specific host, you can club them together using OR condition. But switch statement would be better.

for last default one you can either use default_pool, reject (reject if host header is coming something diff than defined) or return (to stop processing iRule further and use default assigned pool to vip for other hosts)

when HTTP_REQUEST {
    switch -glob [string tolower [HTTP::host]] {
                "aaaa.com" -
		"bbbb.com" - 
		"cccc.com"	
       {
                HTTP::header replace "Host" "api.com"
		set current_uri [HTTP::uri]
                HTTP::uri "/something$current_uri"
		pool new-pool
       }  
       default {
         return
      }
    } 
 }

Mohammad_1363

Altocumulus

Aug 13, 2021

Hello Sanjay

Thanks for your recommendation, is the below one correct an issue with this iRule ?

when HTTP_REQUEST {

if { [string tolower [HTTP::host]] equals "aaaa.com"] ||

[string tolower [HTTP::host]] equals "bbbb.com"] ||

[string tolower [HTTP::host]] equals "cccc.com"] } {

HTTP::header replace "Host" "api.com"

set current_uri [HTTP::uri]

HTTP::uri "/something$current_uri"

pool new pool

#log local0. "URI: [HTTP::uri] Host: [HTTP::host]"

}

spalande
Nacreous
Aug 13, 2021
Please use switch command instead, the one I posted above.
Mohammad_1363
Altocumulus
Aug 13, 2021
Sure, To increase or my knowledge, Is this iRule also correct or not ?
when HTTP_REQUEST {
if { [string tolower [HTTP::host]] equals "aaaa.com"] ||
      [string tolower [HTTP::host]] equals "bbbb.com"] ||
      [string tolower [HTTP::host]] equals "cccc.com"] } {
       HTTP::header replace "Host" "api.com"
       set current_uri [HTTP::uri]
       HTTP::uri "/something$current_uri"
       pool new pool
       #log local0. "URI: [HTTP::uri] Host: [HTTP::host]"
}
}
}
spalande
Nacreous
Aug 13, 2021
seems okay. I would just use return command after pool or else to finish the processing of iRule for other host traffic.
Mohammad_1363
Altocumulus
Aug 13, 2021
like this ?
when HTTP_REQUEST {
if { [string tolower [HTTP::host]] equals "aaaa.com"] ||
      [string tolower [HTTP::host]] equals "bbbb.com"] ||
      [string tolower [HTTP::host]] equals "cccc.com"] } {
       HTTP::header replace "Host" "api.com"
       set current_uri [HTTP::uri]
       HTTP::uri "/something$current_uri"
       pool new pool
       #log local0. "URI: [HTTP::uri] Host: [HTTP::host]"
}
default {
return
}
}

spalande

Nacreous

Aug 13, 2021

when HTTP_REQUEST {
 
 if { [string tolower [HTTP::host]] equals "aaaa.com"] ||
 
      [string tolower [HTTP::host]] equals "bbbb.com"] ||
 
      [string tolower [HTTP::host]] equals "cccc.com"] } {
 
       HTTP::header replace "Host" "api.com"
 
       set current_uri [HTTP::uri]
 
       HTTP::uri "/something$current_uri"
pool new pool
 
       #log local0. "URI: [HTTP::uri] Host: [HTTP::host]"
return
  }
 }
}