External application open with post method

I have used  Vaadin 7.6.6 version.  

I want,  from my  dashboard screen  open  external application  with post method.
Vaadin  forum  say  that  FormSender  can be used for this  , but  for me it isn't work.  

I  tryed  to  wrote  next code  for testing solution with  form sender  :

final FormSender formSender = new FormSender();
Window mainWindow = new Window();
formSender.setFormMethod(Method.POST);
formSender.setFormTarget("http://localhost:8080/birt/frameset");
mainWindow.setImmediate(true);
mainWindow.setContent((Component) formSender);
formSender.submit();
getUI().addWindow(mainWindow);

but  I  get  next error when  on code execution:
java.lang.ClassCastException: org.vaadin.risto.formsender.FormSender cannot be cast to com.vaadin.ui.Component

Thanks for help

Hi Angela,
as stated in addon page on directory it has been changed into extension, so you can't add it as a component.
See the code example on the same page.

HTH
Marco

Thanks Marco

I  corrected my  code , but it doesn't worke and  further

final Button b = new Button("Research Library", new ClickListener() {

@Override

public void buttonClick(final ClickEvent event) {

final FormSender formSender = new FormSender();

formSender.setFormMethod(Method.POST);

formSender.setFormTarget("https://vaadin.com/forum#!/thread/13868183");

formSender.extend(UI.getCurrent());

formSender.submit();

}

});
 

Hi Angela,
did you notice some kind of errors on logs or browser console?
Have you correctly recompiled your widgetset?

Hi  Marco

I don't have any  error  on  browser consola. 
Maybe my servlet  doesn't  set  correct for  this.

What do you mena ?

I have  thise code  in servlet

public class DashboardServlet extends VaadinServlet {

private static final long serialVersionUID = -4651908737680452459L;

public static String username = null;

public static String password =null;

@Override

protected void servletInitialized() throws ServletException {

super.servletInitialized();

getService().setSystemMessagesProvider(

new SystemMessagesProvider() {

private static final long serialVersionUID = 1649255971423583972L;

@Override

public SystemMessages getSystemMessages(

SystemMessagesInfo systemMessagesInfo) {

CustomizedSystemMessages messages = new CustomizedSystemMessages();

messages.setSessionExpiredNotificationEnabled(false);

return messages;

}

});

}

@Override

protected void service(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {

super.service(request, response);

if (username == null)

{

username= request.getParameter("un");

password= request.getParameter("pw");

}
}}

Hi Angela,
having a better look at your code I noticed that you set your url as target not as action of the from

Try use

formSender.setFormAction("http://localhost:8080/birt/frameset");

instead of

formSender.setFormTarget("http://localhost:8080/birt/frameset");

By the way, do not store user data in your servlet; the same servlet instance may serve different users

HTH
Marco

Marco,

I made  solution with  executing javascript  from Vaadin.  I think that  7.6.6  doesn't suported  formSender.  It is solution :

                  URL url = new URL(url);
            StringBuilder script = new StringBuilder();
           
                   script.append("my_form=document.createElement('FORM');");
                   script.append("my_form.name='myForm';");
                   script.append("my_form.method='POST';  ");
                   script.append("my_form.target='_blank';  ");
                   script.append("my_form.action='" + url + "';");

                   script.append("my_tb=document.createElement('INPUT'); ");
                   script.append("my_tb.type='HIDDEN';  ");
                  
                   script.append("my_tb.id='" +  id + "';");
                   script.append("my_tb.name='" +  name + "';");
                   script.append("my_tb.value='" + value +"';");
                   script.append("my_form.appendChild(my_tb); ");

                   script.append("my_tb=document.createElement('INPUT'); ");
                  script.append("my_tb.type='HIDDEN';  ");

                   script.append("my_tb.id='" +  id + "';");
                   script.append("my_tb.name='" +  name + "';");
                   script.append("my_tb.value='" + value +"';");

                  script.append("my_form.appendChild(my_tb); ");

                   script.append("document.body.appendChild(my_form); ");
                   script.append("my_form.submit();");
                   JavaScript.getCurrent().execute(script.toString());

thanks
Angela