Forum Discussion

daveclarkjr's avatar
daveclarkjr
Icon for Nimbostratus rankNimbostratus
Nov 11, 2016

host replace question with iRule

Is there any way to keep F5VSserver.null.com as the host? Would using HTTP::host be an option?   client request   https://f5VSserver.null.com/?uri=http://Server1.null.com/xyz/go?app_url=http:...
application delivery
BIG-IP
iRules
VernonWells's avatar
VernonWells
Icon for Employee rankEmployee
Nov 11, 2016

Ah, so I assume what you really want is to change what comes after app_url= in the Request Query Parameters. Assuming that is the case, you can simply extend the 

string map
set:

when HTTP_REQUEST {
    log local0. "xyz_Forms = [HTTP::uri]"

    if { [string tolower [HTTP::uri]] contains "xyz" } { 
        set uri [string map -nocase { "/?uri=http://Server1.null.com/xyz/" "/xyz/" "Server2.null.com:8000" "[HTTP::host]" } [HTTP::uri]]
        log local0. "xyz_new = $uri" HTTP::uri $uri 
    } 
}

That would change this Request Target:

/?uri=http://Server1.null.com/xyz/go?app_url=http://Server2.null.com:8000/http_handler/file.htm

into this:

/xyz/go?app_url=http://f5VSserver.null.com/http_handler/file.htm

assuming that the Host header is set to f5VSserver.null.com.