Identify large download (Content-Length header) and manually disable ASM

when HTTP_RESPONSE {

 Check if response content-length is greater than 52428800 (max_filtered_html_length) 

if {([HTTP::header "content-length"] > 52428800) } {  

 Disable ASM Processing 
ASM::disable
     If below the content-length threshold, enable ASM processing
} else {
ASM::enable /Common/ASMPOLICYNAME

This works great