Struts 2.5.10 FileUploadInterceptor

FileUploadInterceptor.java

// intercept(...) method from Struts 2.5.10
// https://github.com/apache/struts/blob/f0f4e9ece77000e0eb0071bf233ed4b9bc9c8205/core/src/main/java/org/apache/struts2/interceptor/FileUploadInterceptor.java#L264
    
    public String intercept(ActionInvocation invocation) throws Exception {
        ActionContext ac = invocation.getInvocationContext();

        HttpServletRequest request = (HttpServletRequest) ac.get(ServletActionContext.HTTP_REQUEST);

        if (!(request instanceof MultiPartRequestWrapper)) {
            if (LOG.isDebugEnabled()) {
                ActionProxy proxy = invocation.getProxy();
                LOG.debug(getTextMessage("struts.messages.bypass.request", new String[]{proxy.getNamespace(), proxy.getActionName()}));
            }

            return invocation.invoke();
        }

        ValidationAware validation = null;

        Object action = invocation.getAction();

        if (action instanceof ValidationAware) {
            validation = (ValidationAware) action;
        }

        MultiPartRequestWrapper multiWrapper = (MultiPartRequestWrapper) request;

        if (multiWrapper.hasErrors()) {
            for (LocalizedMessage error : multiWrapper.getErrors()) {
                if (validation != null) {
                    validation.addActionError(LocalizedTextUtil.findText(error.getClazz(), error.getTextKey(), ActionContext.getContext().getLocale(), error.getDefaultMessage(), error.getArgs()));
                }
            }
        }
        
        // ...