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<%!   
 
     /**  
 
     *  If returns true, then should return a 304 (HTTP_NOT_MODIFIED) 
 
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     public   static   boolean  checkFor304( HttpServletRequest req,  
 
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    {  
 
         //   
 
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         //   If the client has set the following headers, do not try for a 304.  
 
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