AUTOLOGIN To Moodle

[pratik lodha]

A java program,but with errors ,need help 

import org.jsoup.Jsoup;

import org.jsoup.nodes.Document;

import org.jsoup.nodes.Element;

import org.jsoup.select.Elements;

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.InputStreamReader;

import java.io.UnsupportedEncodingException;

import java.net.CookieHandler;

import java.net.CookieManager;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

import java.net.URLEncoder;

import java.util.ArrayList;

import java.util.List;

public class tp {

private List<String> cookies;

private URLConnection conn;

private final String USER_AGENT="Mozilla/5.0";

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

String url="http://moodle.iitb.ac.in/login/index.php";

String moodle="http://moodle.iitb.ac.in";

tp http=new tp();

CookieHandler.setDefault(new CookieManager());

String page =http.GetPageContent(moodle);

String postParams = http.getFormParams(page, "130040012", "password");

http.sendPost(url,postParams);

String result = http.GetPageContent(moodle);

System.out.println(result);

}

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

URL obj = new URL(url);

conn = (URLConnection) obj.openConnection();

 

// Acts like a browser

conn.setUseCaches(false);

((HttpURLConnection) conn).setRequestMethod("POST");

conn.setRequestProperty("Host", "moodle.iitb.ac.in");

conn.setRequestProperty("User-Agent", USER_AGENT);

conn.setRequestProperty("Accept",

"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");

conn.setRequestProperty("Accept-Language", "en-US,en;q=0.8");

for (String cookie : this.cookies) {

conn.addRequestProperty("Cookie",cookie.split(";",1)[0]);

}

conn.setRequestProperty("Connection", "keep-alive");

conn.setRequestProperty("Referer", "http://moodle.iitb.ac.in/");

conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

conn.setRequestProperty("Content-Length", Integer.toString(postParams.length()));

 

conn.setDoOutput(true);

conn.setDoInput(true);

 

// Send post request

DataOutputStream wr = new DataOutputStream(conn.getOutputStream());

wr.writeBytes(postParams);

wr.flush();

wr.close();

 

int responseCode = ((HttpURLConnection) conn).getResponseCode();

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

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

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

 

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 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("login");

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

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

for (Element inputElement : inputElements) {

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

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

 

if (key.equals("username"))

value = username;

else if (key.equals("Password"))

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();

}

private String GetPageContent(String url)throws Exception {

URL obj = new URL(url);

conn = (URLConnection) obj.openConnection();

 

// default is GET

((HttpURLConnection) 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 = ((HttpURLConnection) conn).getResponseCode();

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

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

 

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 List<String> getCookies() {

return cookies;

 }

 

 public void setCookies(List<String> cookies) {

this.cookies = cookies;

 }

}

[Manish Goregaokar]

Please explain what the errors are.

Also, you might want to try it in Python. It's been done before: here, here , and here, and the login takes a very small amount of code (plus you can just copy it!)

-Manish Goregaokar

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[Dilawar Singh]

Seems to be compiling fine on my system. Check where file `jsoup.jar` is located. Use this on command line.

javac -cp /usr/share/java/jsoup.jar tp.java

-
Dilawar