in src/main/java/org/apache/sling/security/impl/ContentDispositionFilter.java [154:163]
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
final SlingHttpServletRequest slingRequest = (SlingHttpServletRequest) request;
final SlingHttpServletResponse slingResponse = (SlingHttpServletResponse) response;
final RewriterResponse rewriterResponse = new RewriterResponse(slingRequest, slingResponse);
chain.doFilter(request, rewriterResponse);
}