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POLogging in on website programmatically
 

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  1. POLogging in on website programmatically
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    <p>I have used this tutorial to try to login to a website from the company I am doing my internship at: <a href="http://www.mkyong.com/java/how-to-automate-login-a-website-java-example/" rel="nofollow">http://www.mkyong.com/java/how-to-automate-login-a-website-java-example/</a></p> <p>However, It is not logging in, since the URL when you're logged in to the site is the same as when you're not logged in. So all that happens is me adding the data to the fields, and then the page refreshes, with nothing happening. Can anyone tell me how I am supposed to continue?</p> <p>Thanks</p> <p>(Edit): I only have a redirect link</p> <pre><code>public class ProfileLogin extends AsyncTask&lt;Void, Void, Void&gt;{ private List&lt;String&gt; cookies; private HttpsURLConnection conn; private final String USER_AGENT = "Mozilla/5.0"; private String page; private String userName; private String passWord; private String postParams; URL obj; //Setting up out connection public ProfileLogin(String user, String pass){ CookieManager cManager = new CookieManager(); CookieHandler.setDefault(cManager); page = null; try { obj = new URL(LOGIN_URL); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } //Setting the username and password userName = user; passWord = pass; try { conn = (HttpsURLConnection) obj.openConnection(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } //Starting our Asynctask to do all of the networking execute(); } public VpnProfile getProfiles(){ VpnProfile profile = new VpnProfile(null); return profile; } public String getPageContent() throws Exception{ //Set Get method conn.setRequestMethod("GET"); conn.setUseCaches(false); //The properties of our site, we need to act like a browser 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", "nl-NL,nl;q=0.8,en-US;q=0.6,en;q=0.4"); if(cookies != null){ for(String cookie : this.cookies){ conn.addRequestProperty("Cookie", cookie.split(";", 1)[0]); } } int responseCode = conn.getResponseCode(); System.out.println("\nSending 'GET' request to URL : " + LOGIN_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(); setCookies(conn.getHeaderFields().get("Set-Cookie")); return response.toString(); } private String getFormParams(String userName2, String passWord2) throws Exception{ System.out.println("Extract form's data..."); Document doc = Jsoup.parse(page); //Elements of the login page Element userNameElement = doc.getElementById("username"); Element passWElement = doc.getElementById("password"); List&lt;String&gt; paramList = new ArrayList&lt;String&gt;(); paramList.add(userNameElement.attr("name") + "=" + URLEncoder.encode(userName2, "UTF-8")); paramList.add(passWElement.attr("name") + "=" + URLEncoder.encode(passWord2, "UTF-8")); StringBuilder result = new StringBuilder(); for(String param : paramList){ if(result.length() == 0){ result.append(param); } else { result.append("&amp;" + param); } } return result.toString(); } private void sendPost(String postParams) throws Exception { conn = (HttpsURLConnection) obj.openConnection(); //Act like a browser conn.setUseCaches(false); conn.setRequestMethod("POST"); //This line is deleted, I can't show the url, I set the host here 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", "nl-NL,nl;q=0.8,en-US;q=0.6,en;q=0.4"); if(cookies != null){ for(String cookie : this.cookies){ System.out.println("This is cookies: " + cookie); conn.addRequestProperty("cookie", cookie.split(";", 1)[0]); } } conn.setRequestProperty("Connection", "keep-alive"); //Deleted line setting referer URL conn.setRequestProperty("Content-Type", "text/html; charset=UTF-8"); conn.setRequestProperty("Content-Length", Integer.toString(postParams.length())); conn.setDoOutput(true); conn.setDoInput(true); DataOutputStream wr = new DataOutputStream(conn.getOutputStream()); wr.writeBytes(postParams); wr.flush(); wr.close(); int responseCode = conn.getResponseCode(); System.out.println("\nSending 'POST' request to URL : " + LOGIN_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(); } @Override protected Void doInBackground(Void... arg0) { try { page = getPageContent(); postParams = getFormParams(userName, passWord); sendPost(postParams); page = getPageContent(); Document doc = Jsoup.parse(page); Element userNameElement = doc.getElementById("username"); if(userNameElement.toString() != null){ System.out.println("Not logged in"); }else{ System.out.println("Logged in!"); } }catch(Exception e){ e.printStackTrace(); } return null; } private void setCookies(List&lt;String&gt; cookies) { this.cookies = cookies; } } </code></pre>
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    1. USBlack Magic
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    1. COCan you show your attempt and explain in more detail how it doesn't work as expected? How does the server respond to the login attempt?
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      1. POLogging in on website programmatically
      1. USDavid
    2. COdoes the website you aretrying to log into usses httppost=??to submit it's login form??if yes then i can trya very simple code i developed to login into website
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      1. POLogging in on website programmatically
      1. USAnkit Srivastava
    3. CODavid: I don't think the server sees my login attempt since I am not actually logging in, because it's only reloading the page, and not continuing. user2993677: Yes it uses HTTP Post
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      1. POLogging in on website programmatically
      1. USBlack Magic
 

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