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Muhannad's avatar
Muhannad
Icon for Cirrus rankCirrus
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's avatar
    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's avatar
CA_Valli
Icon for MVP rankMVP

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
Muhannad's avatar
Muhannad
Icon for Cirrus rankCirrus
Oct 19, 2022

This is working perfectly thanks :).