For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

FMA's avatar
FMA
Icon for Nimbostratus rankNimbostratus
Mar 26, 2018

Replace Host part in HTTP::Location

Hello, guys. I'm trying to find a way to perform manipulation with HTTP::header Location.

1. Web-browser requests https://abc.com
2. Web-server replies with HTTP/301 Location: https://xyz.com/{$URI} (URI part might change when browsing)
3. I need to have HTTP::Location modified to https://abc.com/{$URI} (whatever was put in 2)

I was trying to achieve this with getfield with "/" as delimiter to catch URI part, but this gets broken as number of slashes in Location might increase 😕

Thanks!

application delivery
BIG-IP
iRules

2 Replies

  • Lee_Sutcliffe's avatar
    Lee_Sutcliffe
    Icon for Nacreous rankNacreous
    Mar 26, 2018

    You could try something like this:

    when HTTP_REQUEST {
    set uri [HTTP::uri]
}

when HTTP_RESPONSE {
    if {([HTTP::is_redirect]) && ([HTTP::header Location] contains "xyz.com" )} {
        HTTP::header replace Location "https://abc.com$uri"
    }
}
  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Mar 26, 2018

    Hi,

    I recommend to replace absolute URI to relative URI. This rewrite rule may have been useless if the server had responded with relative URI.

    when HTTP_RESPONSE {
    if { [HTTP::header exists Location] && ([URI::host [HTTP::header value Location]] equals "xyz.com")} {
        HTTP::header replace Location [string map {https://xyz.com/ /} [HTTP::header value Location]]
    }
}