using System.Forms;

public sealed class test{
protected int test;
internal int test2;
AutomaticLogin {

    private int test3;
List<String> cookies;
    private HttpsURLConnection conn;

    private final String USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20100101 Firefox/25.0";

    public test (){
Init()}
static void main(String[] args) throws Exception {

        String url = "https://accounts.craigslist.org/login";
        String gmail = "https://accounts.craigslist.org/login/home?show_tab=postings";


        AutomaticLogin http = new AutomaticLogin();


        CookieHandler.setDefault(new CookieManager());

        String page = http.GetPageContent(url);

        String postParams = http.getFormParams(page, "username", "password");

        String anotherString = null;
        anotherString = postParams.substring(0, 93);

        System.out.println(postParams);
        System.out.println();


        http.sendPost(url, postParams);

        String result = http.GetPageContent(gmail);
        System.out.println(result);

    }

    private void sendPost(String url, String postParams) throws Exception {

        URL obj = new URL(url);
        conn = (HttpsURLConnection) obj.openConnection();



        conn.setUseCaches(false);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Host", "craigslist.org");
        conn.setRequestProperty("User-Agent", USER_AGENT);
        conn.setRequestProperty("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
        conn.setAllowUserInteraction(true);

        conn.setRequestProperty("Connection", "keep-alive");
        conn.setRequestProperty("Referer", "https://accounts.craigslist.org/login/home");
        conn.setRequestProperty("Content-Type", "x-www-form-urlencoded");

        conn.setFixedLengthStreamingMode(postParams.getBytes().length);

        conn.setInstanceFollowRedirects(false);

        conn.setDoOutput(true);
        conn.setDoInput(true);
        if (cookies != null) {
            for (String cookie : this.cookies) {
                conn.addRequestProperty("Cookie", cookie.split(" ", 2)[0]);
            }
        }


        DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
        wr.writeBytes(postParams);
        wr.flush();
        wr.close();

        int responseCode = conn.getResponseCode();
        String msg = conn.getResponseMessage();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + postParams);
        System.out.println("Response Code : " + responseCode);
        System.out.println(msg);


        BufferedReader in = 
                new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);


        }
        in.close();
        System.out.println(response.toString());

    }

    private String GetPageContent(String url) throws UnexpectedException, Exception  {

        URL obj = new URL(url);
        conn = (HttpsURLConnection) obj.openConnection();

        conn.setRequestMethod("GET");

        conn.setUseCaches(false);

        // act like a browser
        conn.setRequestProperty("User-Agent", USER_AGENT);
        conn.setRequestProperty("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
        if (cookies != null) {
            for (String cookie : this.cookies) {
                conn.addRequestProperty("Cookie", cookie.split(" ", 1)[0]);
            }
        }
        int responseCode = conn.getResponseCode();
        String msg = conn.getResponseMessage();
        System.out.println("\nSending 'GET' request to URL : " + url);
        System.out.println("Response Code : " + responseCode);
        System.out.println(msg);

        BufferedReader in = 
                new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();


        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }

        in.close();

        // Get the response cookies

        setCookies(conn.getHeaderFields().get("Set-Cookie"));

        return response.toString();

    }

    public String getFormParams(String html, String username, String password)
            throws UnsupportedEncodingException {

        System.out.println("Extracting form's data...");

        Document doc = Jsoup.parse(html);

        // Google form id
        Element loginform = doc.getElementById("pagecontainer");
        Elements inputElements = loginform.getElementsByTag("input");
        int count = 0;
        List<String> paramList = new ArrayList<String>();
        for (Element inputElement : inputElements) {
            String key = inputElement.attr("name");
            String value = inputElement.attr("value");

            if(key.equals("emailAddress"))
                break;
            if (key.equals("inputEmailHandle"))
                value = username;
            else if (key.equals("inputPassword"))
                value = password;

            paramList.add(key + "=" + URLEncoder.encode(value, "UTF-8"));
        }


        // build parameters list
        StringBuilder result = new StringBuilder();

        for (String param : paramList) {

            if (result.length() == 0) {
                result.append(param);
            } else {
                result.append("&" + param);
            }
        }
        return result.toString();
    }
    public List<String> getCookies() {
        return cookies;
    }
    public void setCookies(List<String> cookies) {
        this.cookies = cookies;
    }
}