Specify expires or Cache-control for a file header

Cache-control :private,no-cache,must-revalidate,max-age

Expires Specify page expiration time  

Response . setContentType ("Charset=utf-8");

Response . SetHeader ("Pragma","No-cache");

Response . SetHeader ("Cache-control","No-cache");

Response . Setdateheader ("Expires", 0);

Web content design is now becoming richer, which means more scripts, stylesheets, pictures, and Flash are included in the page. the user who accesses your page for the first time means to make multiple HTTP requests, but it can be cached by using the Expires file header. It avoids unnecessary HTTP requests in the next page access. The Expires file header is often used for image files, but should be used in all content, including scripts, stylesheets, and Flash .

Specify expires or Cache-control for a file header