LTM - I-Rule http_process_state_prepend - Invalid action

Sure, here it is.

when HTTP_REQUEST {
     log local0.info "[IP::client_addr]:[TCP::client_port]: request triggered - irule_Public"

if {[class match [IP::client_addr] equals authError]}
{
   log local0.info "[IP::client_addr] from authError sent a request"
   HTTP::collect 1500
}
else
{
   if { not (([HTTP::path] equals "/cwmpWeb/CPEMgt") || ([HTTP::path] starts_with "/BackupRestore/"))  }
   {
      HTTP::respond 404 content {Page Not FoundPage Not Found} "Connection" "close"
   }
   if { [HTTP::header exists Authorization] }
   {
      if { [HTTP::header "User-Agent"] starts_with "Thomson" }
      {
         log local0.info "[IP::client_addr]:[TCP::client_port]: Filter_noserial Authorisation exists"
         HTTP::collect 1500
      }
      else
      {
         if { ([HTTP::header exists "Content-Length"]) && ([HTTP::header "Content-Length"] <= 1000000) && ([HTTP::header "Content-Length"] > 0) }
         { 
            HTTP::collect [HTTP::header Content-Length]
            log local0.info "[IP::client_addr]:[TCP::client_port]:[TCP::remote_port]: Filter_noserial triggered. ContentLength Exists"
         }
      }
   }
   else
   {
      HTTP::respond 401 "WWW-Authenticate" "Basic realm=\"default\"" "Connection" "close"
      log local0.info "[IP::client_addr]:[TCP::client_port]: Filter_noserial Authorisation doese not exists"
   }
}
}

when HTTP_REQUEST_DATA {  
   log local0.info "[IP::client_addr]:[TCP::client_port]: Filter_noserial REQUEST_DATA triggered. irule_Public"

   if {[class match [IP::client_addr] equals authError]}
   {
      if {([findstr [HTTP::payload] "2 PERIODIC" ] ne "") || ([findstr [HTTP::payload] "6 CONNECTION REQUEST" ] ne "") || ([findstr [HTTP::payload] "1 BOOT" ] ne "") }
      {
         log local0.info "[IP::client_addr] request contains Periodic Inform or normal boot and has to be sent to Bootstrap"
         pool APPL_iwe
      }
      else
      {
         log local0.info "[IP::client_addr] request should get activated but has to wait till the script gets disabled"
         log local0.info "[IP::client_addr] [HTTP::payload]"
         pool Application_public
         HTTP::respond 503 Retry-After: 300
      }
   }
   else
   {
      if { not ([findstr [HTTP::payload] "" ] eq "")  }
      {
         HTTP::respond 204 "Connection" "close"
         log local0.info "[IP::client_addr]->[TCP::local_port] Filter_noserial matched"   
      }  
      if { [findstr [HTTP::payload] "Router" ] ne "" }
      {
         log local0.info "[IP::client_addr]->[TCP::local_port] ROUTER"   
         HTTP::payload replace 0 [HTTP::payload length] [string map -nocase "Router PRGAV4202N" [HTTP::payload]]
      }    
      if { [findstr [HTTP::payload] ">0.0.0.0" ] ne "" }
      {
         log local0.info "[IP::client_addr]->[TCP::local_port] 0.0.0.0"   
         set client_ip [IP::client_addr]
      }
      HTTP::disable
   }
}