package com.atlassian.core.filters.cache;
   
   import org.apache.commons.lang.StringUtils;
   
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
   
   /**
    * Applies caching headers to ensures JSP responses are not cached by the client. A JSP request is
   * one that has the string ".jsp" somewhere in the request URI.
   *
   * @since 4.0
   */
  public final class JspCachingStrategy implements CachingStrategy
  {
      public final boolean matches(HttpServletRequest request)
      {
          final String uri = request.getRequestURI();
          return StringUtils.indexOf(uri, ".jsp") > 0;
      }
  
      public final void setCachingHeaders(HttpServletResponse response)
      {
          response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // http 1.1
          response.setHeader("Pragma", "no-cache"); // http 1.0
          response.setDateHeader("Expires", 0); // prevent proxy caching
      }
  }