Forum Discussion

dihris_116090's avatar
dihris_116090
Icon for Nimbostratus rankNimbostratus
May 28, 2016

HTTP Rewrite header + pool based on URI

Hi, I need to forward traffic from external URL to one of our internal servers based on URI. That has to be transparent for the browser with no redirect messages 3xx. Searching in the forum and u...
application delivery
iRules
  • Yann_Desmarest_'s avatar
    Yann_Desmarest_
    May 28, 2016

    Hi,

    here an rule example :

    when RULE_INIT {
    set external_hostname "externalsite.com"  
    set internal_hostname "internalsite.com"  
}
when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool] 
} 
when HTTP_REQUEST {
     Disable the stream filter for requests
    STREAM::disable

     Remove this header to prevent server from compression response
    HTTP::header remove Accept-Encoding

    if { ([string tolower [HTTP::path]] eq "/foobar") } {
        HTTP::host [string map {$external_hostname $internal_hostname} [HTTP::host]] 
        pool internal_pool
    } else { 
        pool $default_pool
    }
}
when HTTP_RESPONSE {
     Rewrite the Location header for redirects 
    if { [HTTP::header exists Location] }{ 
        HTTP::header replace Location [string map {$external_hostname $internal_hostname} [HTTP::header Location]] 
    } 

     Rewrite the response content using a stream profile if it is text 
    if { [HTTP::header Content-Type] contains "text" } { 

         Set the stream expression with the find/replace strings 
        STREAM::expression "@xyz.company.com@abc.company.com@" 

         Enable the stream filter 
        STREAM::enable 
    } 
}
Vijay_E's avatar
Vijay_E
Icon for Cirrus rankCirrus
May 28, 2016

Try this (untested):

when RULE_INIT {
set external_hostname "externalsite.com"  
set internal_hostname "internalsite.com"  

when CLIENT_ACCEPTED { 
set default_pool [LB::server pool] 
}

when HTTP_REQUEST {
if { ([string tolower [HTTP::uri]] eq "/foobar") } {
    HTTP::host [string map {$external_hostname $internal_hostname} [HTTP::host]] pool internal_pool
} else { 
    pool $default_pool
}

when HTTP_RESPONSE {
if { [HTTP::header values Location] contains "$internal_hostname" } {
HTTP::header replace Location [string map {$internal_hostname $external_hostname} [HTTP::header value Location]]
}
}