@Override
    public long getDateHeader(String name) {

        // make sue "last modified since" optimization is NOT used for export requests
        if (CmsRequestUtil.HEADER_IF_MODIFIED_SINCE.equals(name)) {
            // return -1, this means "no header has been set" in servlet standard
            return -1;
        }
        return super.getDateHeader(name);
    }
@ Override public long getDateHeader ( String name ) { if ( CmsRequestUtil . HEADER_IF_MODIFIED_SINCE . equals ( name ) ) { return - 1 ; } return super . getDateHeader ( name ) ; }
@see javax.servlet.http.HttpServletRequest#getDateHeader(java.lang.String)