304 Response code failure with java script Application

We have a problem with 304 response code

 

First Scenario:

 

-> VS listen on HTTPS and Server on HTTP with client SSL profile only with automap

 

-> Here we viewed that GET HTTP request sent with more header than the second scenario with "if modified since" header and "if none match" header

 

-> Which caused server respond with 304 response code

 

All 304 response code appeared with URL contain "JS" only

 

Second Scenario:

 

-> VS listen on HTTP and server on HTTP with automap

 

-> Here Server respond without any "if modified since" header and "if none match" header

 

-> As well as the server respond with 200 response code

 

All 304 response code appeared with URL contain "JS" only