public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
// prepare the request no matter what - this ensures that the proper character encoding
// is used before invoking the mapper (see WW-9127)
DispatcherUtils du = DispatcherUtils.getInstance();
du.prepare(request, response);
ServletContext servletContext = filterConfig.getServletContext();
try {
request = du.wrapRequest(request, servletContext);
} catch (IOException e) {
String message = "Could not wrap servlet request with MultipartRequestWrapper!";
LOG.error(message, e);
throw new ServletException(message, e);
}
try {
Integer count = (Integer) request.getAttribute(COUNTER);
if (count == null) {
count = new Integer(1);
} else {
count = new Integer(count.intValue() + 1);
}
request.setAttribute(COUNTER, count);
chain.doFilter(request, response);
} finally {
int counterVal = ((Integer) request.getAttribute(COUNTER)).intValue();
counterVal -= 1;
request.setAttribute(COUNTER, new Integer(counterVal));
cleanUp(request);
}
}
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
DispatcherUtils.initialize(filterConfig.getServletContext());
}