Problems submitting a login form with Jsoup

Question

For some reason this code will not let me into the website when I use the correct login information. The System.out.println posts the code of the login page, indicating my code did not work. Can someone tell me what I'm forgetting or what's wrong with it?

public void connect() {

    try {
        Connection.Response loginForm = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/login.php")
                .method(Connection.Method.GET)
                .execute();

        org.jsoup.nodes.Document document = Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/authentication.php")
                .data("cookieexists", "false")
                .data("username", "myUsername")
                .data("password", "myPassword")
                .cookies(loginForm.cookies())
                .post();
        System.out.println(document);
    } catch (IOException ex) {
        Logger.getLogger(WebCrawler.class.getName()).log(Level.SEVERE, null, ex);
    }
}

Answer 1

Besides the username, password and the cookies, the site requeires two additional values for the login - VIEWSTATE and EVENTVALIDATION.
You can get them from the response of the first Get request, like this -

Document doc = loginForm.parse();
Element e = doc.select("input[id=__VIEWSTATE]").first();
String viewState = e.attr("value");
e = doc.select("input[id=__EVENTVALIDATION]").first();
String eventValidation = e.attr("value");

And add it after the password (the order doesn't really matter) -

org.jsoup.nodes.Document document = (org.jsoup.nodes.Document) Jsoup.connect("https://www.capitaliq.com/CIQDotNet/Login.aspx/authentication.php").userAgent("Mozilla/5.0")               
            .data("myLogin$myUsername", "MyUsername")
            .data("myLogin$myPassword, "MyPassword")
            .data("myLogin$myLoginButton.x", "22")                   
            .data("myLogin$myLoginButton.y", "8")
            .data("__VIEWSTATE", viewState)
            .data("__EVENTVALIDATION", eventValidation)
            .cookies(loginForm.cookies())
            .post();

I would also add the userAgent field to both requests - some sites test it and send different pages to different clients, so if you would like to get the same response as you get with your browser, add to the requests .userAgent("Mozilla/5.0") (or whatever browser you're using).

Edit
The userName's field name is myLogin$myUsername, the password is myLogin$myPassword and the Post request also contains data about the login button. Ican't test it, because I don't have user at that site, but I believe it will work. Hope this solves your problem.

EDIT 2
To enable the remember me field during login, add this line to the post request:

.data("myLogin$myEnableAutoLogin", "on")