private void printOriginStackTrace() {
// use stacktrace to find out more where the filter was used
OLATRuntimeException ore = new OLATRuntimeException("XSSFilter dummy", null);
final Writer result = new StringWriter();
final PrintWriter printWriter = new PrintWriter(result);
ore.printStackTrace(printWriter);
}
private String getCleanHTML(String original) {
Policy policy = null;
try {