Download file, filename doesn't work in portlet

Question

I set filename in the HttpServletResponse header but when I download it has not this filename

FileInputStream fis = new FileInputStream(fileDocument         


        

Answer 1

If you are in the action or render phase of your portlet (what I would guess for a JSF portlet): there is a ResponseWrapper which will suppress any header. I'm using this method to find the response for sending binary data during the JSF lifecycle:

public static HttpServletResponse getHttpServletResponse() {
    final FacesContext facesContext = FacesContext.getCurrentInstance();
    if (facesContext == null) {
        throw new IllegalStateException("Not inside a JSF request");
    }
    final Object responseObject = facesContext.getExternalContext().getResponse();
    if (responseObject instanceof HttpServletResponse) {
        return (HttpServletResponse) responseObject;
    }
    if (responseObject instanceof PortletResponse) {
        // Use Liferays util to find the real response
        HttpServletResponse response = PortalUtil.getHttpServletResponse((PortletResponse) responseObject);
        // Find the outer most response (setting the headers would have no effect, as we are included)
        while (response instanceof ServletResponseWrapper) {
            final ServletResponse servletResponse = ((ServletResponseWrapper) response).getResponse();
            if (!(servletResponse instanceof HttpServletResponse)) {
                break;
            }
            response = (HttpServletResponse) servletResponse;
        }
        return response;
    }
    throw new IllegalStateException("Unknown type of response object: " + responseObject);
}