Client Caching of Java Server Pages

Client Caching of Java Server Pages

When I redirect a request from a Servlet to a JSP, the browsercaches the JSP and won’t display an updated page without reloading.How do I prevent the page from being cached?

The HTTP/1.1 specification specifies a header called Cache-Control,that can be used to alter the caching behavior of clients andintermediate proxy servers. Setting the value of this header to”no-cache” causes an HTTP response not to be stored by any interveningcaches. However, HTTP/1.0 clients may not recognize the Cache-Controlheader. For these clients, adding a Pragma header field with thevalue “no-cache” will serve the same purpose, but not all HTTP/1.0clients will necessarily recognize this header. To account forHTTP/1.0 clients that don’t recognize a “Pragma: no-cache” header, youcan set the expiration time of the response to a past date using theExpires date header field. Here’s an example of how to do this withina JSP page using the response variable, which is an instance ofHttpServletResponse.

response.setHeader("Cache-Control", "no-cache");response.setHeader("Pragma", "no-cache");response.setDateHeader("Expires", 0);

Make sure to set these headers before your JSP page produces anyoutput, otherwise the headers may not take effect.

Share the Post:
data observability

Data Observability Explained

Data is the lifeblood of any successful business, as it is the driving force behind critical decision-making, insight generation, and strategic development. However, due to its intricate nature, ensuring the

Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular