Forum Discussion

iRule's avatar
iRule
Icon for Cirrus rankCirrus
Mar 08, 2023

replace part of URI for specific URL and pass remaining

Dear Community,

I need to replace only specific part of  URI i.e "/abc/defg/" with "/uvw/xyz/"  in a URL. All other URLs should not be altered.

"/abc/defg/" will appear in the begning of URI

For example:

From: https://bbcc.com/abc/defg/v1/derh/user-cases/ profile/morning

To:      https://bbcc.com/uvw/xyz/v1/derh/user-cases/ profile/morning

All Other URLs should not be alerted and sent to pool without modification in URI.

Regards

application delivery
f5
LTM
  • Paulius's avatar
    Paulius
    Mar 14, 2023

    iRule It should be the following and any other additions can be added in a similar manner. You might consider speaking with the application team and have them perform the corrections on the server as this should only be done as a last resort in an iRule.

    when CLIENT_ACCEPTED priority 500 {

    set DEFAULT_POOL [LB::server pool]

}

when HTTP_REQUEST priority 500 {

    if {[string tolower [HTTP::uri]] starts_with "/abc/defg/"} {
        HTTP::uri [string map {"/abc/defg/" "/uvw/xyz/"}[HTTP::uri]]
        pool pool_web
    } elseif {[string tolower [HTTP::uri]] starts_with "/123/456/"} {
        HTTP::uri [string map {"/123/456/" "/78/910/"}[HTTP::uri]]
        pool pool_web
    } elseif{[string tolower [HTTP::uri]] starts_with "/asdf-asdf/"} {
        HTTP::uri [string map {"/asdf-asdf/" "/lkjh-lkjh/"}[HTTP::uri]]
        pool pool_web
    } else {
        pool ${DEFAULT_POOL}
    }

}
  • iRule's avatar
    iRule
    Icon for Cirrus rankCirrus
    Mar 08, 2023

    I tried following iRule but it results in URIs starting with "/abc/defg/" working fine and all other URLs stopped working which are not starting with "/abc/defg/".

     

    when HTTP_REQUEST {
if {[HTTP::uri] starts_with "/abc/defg/"} {
HTTP::uri [string map {"/abc/defg/" "/uvw/xyz/"}[HTTP::uri]]
pool pool_web
}
}

     

    • Paulius's avatar
      Paulius
      Icon for MVP rankMVP
      Mar 08, 2023

      iRule I have made some slight modifications to the iRule but I don't think it will resolve your issue but are best practices.

      when HTTP_REQUEST priority 500 {

    if {[string tolower [HTTP::uri]] starts_with "/abc/defg/"} {
        HTTP::uri [string map {"/abc/defg/" "/uvw/xyz/"}[HTTP::uri]]
        pool pool_web
    }

}

      If you can provide additional detail as to what exactly isn't working for the additional URLs we might be able to assist further.

      • iRule's avatar
        iRule
        Icon for Cirrus rankCirrus
        Mar 08, 2023

        Paulius All other URLs that are not starting with "/abc/defg/" are stopped and I am getting connection reset error. Kindly provide an updated iRule.