iRule Script request

Is there any specific condition that has to be met for this redirect to happen? Is it a specific URI?

if { [string tolower [HTTP::uri]] starts_with "/level1/level2/level3.aspx" } { ...

Is it a specific host name?

if { [string tolower [HTTP::host]] equals "bbb.aaa.com" } { ...

Or do you simply redirect all traffic from an HTTPS site to an HTTP site?

when HTTP_REQUEST {
    HTTP::redirect "http://[HTTP::host][HTTP::uri]"
}

In case you want to create an own ID (not sure if I got your question right) you can use this syntax:

set sessionid "TestSessionID=[format %09d [expr int(rand()*1e9)]].[format %09d [expr int(rand()*1e9)]]"

The session ID could be used as an element of the http query or inside a cookie.

In an iRule you can use [HTTP::uri] which consists of [HTTP::path]?[HTTP::query].

in case you want to redirect when both http host and path match.

e.g.

[root@ve11a:Active:Changes Pending] config  tmsh list ltm virtual bar
ltm virtual bar {
    destination 172.28.20.111:443
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        clientssl {
            context clientside
        }
        http { }
        tcp { }
    }
    rules {
        myrule
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 2
}
[root@ve11a:Active:Changes Pending] config  tmsh list ltm rule myrule
ltm rule myrule {
    when HTTP_REQUEST {
  if { [HTTP::host] equals "bbb.aaa.com" and [HTTP::path] equals "/level1/level2/level3.aspx" } {
    HTTP::redirect "http://www.aaa.org[HTTP::uri]"
  }
}
}

[root@ve11a:Active:Changes Pending] config  curl -Ik https://bbb.aaa.com/level1/level2/level3.aspx?1234567890
HTTP/1.0 302 Found
Location: http://www.aaa.org/level1/level2/level3.aspx?1234567890
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

I´m wondering if Kevin´s and nitass´ advices already worked for you?

 

Perhaps you want to modify references in the HTTP payload received from the server as well?

 

In this case a so called stream profile will help you to modify the payload 'one the fly' and the content length will be recalculated accordingly.