add nofollow http-response rule

Author: KrisMagjistari

manifests/haproxy/autoload.pp

@@ -91,7 +91,7 @@
       $http_edge_rules_all_real = Hash($http_edge_rules_all_real_without_undef)
 
       # Insert additional http-edge rules that are service specific
-      if 'canonicals' in $http_edge_services or 'status410' in $http_edge_services {
+      if 'canonicals' in $http_edge_services or 'status410' in $http_edge_services or or 'nofollow' in $http_edge_services {
         if 'canonicals' in $http_edge_services {
           $http_edge_canonicals_rules_real = flatten($http_edge_rules_all_real['canonicals'], 'set-var(txn.canonical_custom) hdr(X-Canonical-Custom) if { hdr(X-Canonical-Custom) -m found }', 'del-header X-Canonical-Custom if { hdr(X-Canonical-Custom) -m found }')
         }
@@ -101,6 +101,8 @@
             'set-header link %[var(txn.canonical_custom)] if { var(txn.canonical_custom) -m found }'
           } elsif $service == 'status410' {
             'set-status 410 if { var(txn.status410) -m bool }'
+          } elsif $service == 'nofollow' {
+            'set-header X-Robots-Tag "noindex, nofollow" if { var(txn.noindex) -m bool }'
           }
         }
         $http_response_new_rules_real = $http_response_new_rules.filter |$rules| { $rules =~ NotUndef }
@@ -147,7 +149,7 @@
       }
 
       $http_request_rules_hash = {$http_edge_frontend => {'options' => {'http-request' => $http_request_rules_real}}}
-      if 'canonicals' in $http_edge_services or 'status410' in $http_edge_services {
+      if 'canonicals' in $http_edge_services or 'status410' in $http_edge_services or 'nofollow' in $http_edge_services {
         $frontends_real_placeholder = deep_merge($ducktape::haproxy::frontends, $http_request_rules_hash)
         $frontends_real = deep_merge($frontends_real_placeholder, $http_response_rules_hash)
       } else {