Java - Consulta-> Manipular Web con HttpClient

package prueba;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.UnsupportedEncodingException;

import java.net.CookieHandler;

import java.net.CookieManager;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.HttpClientBuilder;

import org.apache.http.message.BasicNameValuePair;

import org.jsoup.Jsoup;

import org.jsoup.nodes.Document;

import org.jsoup.nodes.Element;

import org.jsoup.select.Elements;

public class HttpCilentExample {

  private String cookies;

  private final HttpClient client = HttpClientBuilder.create().build();

  private final String USER_AGENT = "Mozilla/5.0";

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

	String url = "http://moduloagenda.cable.net.co/";

	String gmail = "http://moduloagenda.cable.net.co/Informes/AdmonInformes/InterfazInformes.php";

	// make sure cookies is turn on

	CookieHandler.setDefault(new CookieManager());

        HttpCilentExample http = new HttpCilentExample();

        String page = http.GetPageContent(url);

        //System.out.println(page);

	List<NameValuePair> postParams = http.getFormParams(page, "user","pass");

        http.sendPost(url, postParams);

	String result = http.GetPageContent(gmail);

	//System.out.println(result);

	System.out.println("Done");

  }

  private void sendPost(String url, List<NameValuePair> postParams) throws Exception {

	HttpPost post = new HttpPost(url);

	// add header

	post.setHeader("Host", "moduloagenda.cable.net.co");

	//post.setHeader("User-Agent", USER_AGENT);

	post.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");

	post.setHeader("Accept-Language", "en-US,en;q=0.5");

	post.setHeader("Cookie", getCookies());

	post.setHeader("Connection", "keep-alive");

	post.setHeader("Referer", "http://moduloagenda.cable.net.co/index.php");

	post.setHeader("Content-Type", "application/x-www-form-urlencoded");

	post.setEntity(new UrlEncodedFormEntity(postParams));

	HttpResponse response = client.execute(post);

	int responseCode = response.getStatusLine().getStatusCode();

	//System.out.println("\nSending 'POST' request to URL : " + url);

	//System.out.println("Post parameters : " + postParams);

	//System.out.println("Response Code : " + responseCode);

	BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

	StringBuffer result = new StringBuffer();

	String line = "";

	while ((line = rd.readLine()) != null) {

		result.append(line);

	}

	 System.out.println(result.toString());

  }

  private String GetPageContent(String url) throws Exception {

	HttpGet request = new HttpGet(url);

	request.setHeader("User-Agent", USER_AGENT);

	request.setHeader("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");

	request.setHeader("Accept-Language", "en-US,en;q=0.5");

        HttpResponse response = client.execute(request);

	int responseCode = response.getStatusLine().getStatusCode();

        //System.out.println("\nSending 'GET' request to URL : " + url);

	//System.out.println("Response Code : " + responseCode);

        BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

        StringBuffer result = new StringBuffer();

	String line = "";

	while ((line = rd.readLine()) != null) {

		result.append(line);

	}

	// set cookies

	setCookies(response.getFirstHeader("Set-Cookie") == null ? "" :

                     response.getFirstHeader("Set-Cookie").toString());

	return result.toString();

  }

  public List<NameValuePair> 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("Registro");

	//Elements inputElements = loginform.getElementsByTag("input");

        Elements inputElements = loginform.getElementsByClass("tableLogin1");

        List<NameValuePair> paramList = new ArrayList<>();

        inputElements.stream().forEach((inputElement) -> {

            String key = inputElement.attr("name");

            System.out.println(key);

            String value = inputElement.attr("value");

            System.out.println(value);

            switch (key) {

                case "nv73pBGxlt":

                    value = username;

                    break;

                case "6bupkDzC7E4":

                    value = password;

                    break;

            }

            paramList.add(new BasicNameValuePair(key, value));

      });

	return paramList;

  }

  public String getCookies() {

	return cookies;

  }

  public void setCookies(String cookies) {

	this.cookies = cookies;

  }

}