curl irule behavior

Sorry in the initial post I posted an incorrect curl command - that is corrected here along with additional improved formatting, and log details.

when HTTP_REQUEST {
        set var1 [getfield [HTTP::uri] "/" 2 ]
        log local0. "$var1"
        HTTP::header replace "Host" "https://$var1.host.domain.com:9090"
        log local0. "[HTTP::host]"
        HTTP::uri [substr [HTTP::uri] [expr ([string length $var1 ] + 1 )]]
        log local0. "Host and URI modified to: [HTTP::host][HTTP::uri]"
}

Sorry I don't have access to any of the server logs. I'll work on trying to get some of those though.

Curl Command:

$ curl -k -v -H 'Authorization:HCP  certString ' https://host.domain.com:9090/var1/path1/path2/path3
output:
 
> GET /var1/path1/path2/path3 HTTP/1.1 ( would not expect to see var1 here )
> User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3
> Host: host.domain.com:9090 ( would expect this to be var1.host.domain.com:9090 )

LTM log: ( this looks as it should )

: var1
: https://var1.host.domain.com:9090
: Host and URI modified to: https://var1.host.domain.com:9090/path1/path2/path3