Forum Discussion

Cirrus

Oct 17, 2022

Rewrite Subdomain

Dears, I am wondering about an efficient procedure to search and replace a specific Subdomain in the HOST, What i want to achieve is rewrite the HTTP request toward the server side as follows: Clie...

application delivery

CA_Valli

Oct 17, 2022

Code above is case sensitive on HTTP::host match.

If you want a case-insensitive match you can run this instead

when HTTP_REQUEST {
#    log local0. "Client requested host: [HTTP::host]"
  if { [string tolower [HTTP::host]] starts_with "dir" && [string tolower [HTTP::host]] contains "clust1" }{
    HTTP::header replace Host [string map {"clust1" "clust2"}[string tolower [HTTP::host]]]
#        log local0. "Modified host: [HTTP::host]"
  }
}

Oct 17 15:43:07 bigip info tmm7[11345]: Rule /Common/test-iRule <HTTP_REQUEST>: Client requested host: DIR000.Clust1.Domain.com
Oct 17 15:43:07 bigip info tmm7[11345]: Rule /Common/test-iRule <HTTP_REQUEST>: Modified host: dir000.clust2.domain.com

CA_Valli

MVP

Code above is case sensitive on HTTP::host match.

If you want a case-insensitive match you can run this instead

when HTTP_REQUEST {
#    log local0. "Client requested host: [HTTP::host]"
  if { [string tolower [HTTP::host]] starts_with "dir" && [string tolower [HTTP::host]] contains "clust1" }{
    HTTP::header replace Host [string map {"clust1" "clust2"}[string tolower [HTTP::host]]]
#        log local0. "Modified host: [HTTP::host]"
  }
}

Oct 17 15:43:07 bigip info tmm7[11345]: Rule /Common/test-iRule <HTTP_REQUEST>: Client requested host: DIR000.Clust1.Domain.com
Oct 17 15:43:07 bigip info tmm7[11345]: Rule /Common/test-iRule <HTTP_REQUEST>: Modified host: dir000.clust2.domain.com