Redirect irule puts in query twice

Are you just wanting to redirect with the full URI preserved? In F5 terms, the host is the host header value, the URI is everything after the host which includes the path and the query string. The query string is everything in the URI after the question mark:

http://www.example.com:80/path/to/file.ext?param1=value1&param2=value2

HTTP::host - www.example.com:80

HTTP::uri - /path/to/file.ext?param1=value1&param2=value2

HTTP::path - /path/to/file.ext

HTTP::query - param1=value1&param2=value2

I'd guess this would work for you:

  
  when HTTP_REQUEST {  
    
      Check if host, set to lower case, is admin.mysite.com  
     if { [string tolower [HTTP::host]] eq "admin.mysite.com"} {  
    
         Redirect client to same host and URI via https  
        HTTP::redirect "https://admin.mysite.com[HTTP::uri]"  
     }  
  }  
  

Aaron