android http post response into webview and navigate

Question

i'm making an app that make a post request to Ilias server, I receive the response and open it on a webview, my problem is that if I navigate, when I click some link it doesn't save my credentials and teels me "You are not logged in" and dont continue.

Here is the code:

public class ilias extends Activity {

 WebView webView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        webView = (WebView)findViewById(R.id.webview);

        BufferedReader bufferedReader = null;
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost request = new HttpPost("http://www.ilias.de/docu/login.php?client_id=docu");
        List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
        postParameters.add(new BasicNameValuePair("username", "stacked")); //this username 
        postParameters.add(new BasicNameValuePair("password", "overflow"));//works


  try {
   UrlEncodedFormEntity entity = new UrlEncodedFormEntity(postParameters);
         request.setEntity(entity);

         HttpResponse response= httpClient.execute(request);

   bufferedReader = new BufferedReader(
           new InputStreamReader(response.getEntity().getContent()));
   StringBuffer stringBuffer = new StringBuffer("");
   String line = "";
   String LineSeparator = System.getProperty("line.separator");
   while ((line = bufferedReader.readLine()) != null) {
    stringBuffer.append(line + LineSeparator); 
   }
   bufferedReader.close();

   Toast.makeText(ilias.this, 
     "Finished", 
     Toast.LENGTH_LONG).show();

   String webData = stringBuffer.toString();

   webView.loadData(webData,"text/html","UTF-8");
   webView.loadDataWithBaseURl("http://www.ilias.de/docu/",webData,"text/html","UTF-8","about:blank");

  } catch (ClientProtocolException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   Toast.makeText(ilias.this, 
     e.toString(), 
     Toast.LENGTH_LONG).show();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   Toast.makeText(ilias.this, 
     e.toString(), 
     Toast.LENGTH_LONG).show();
  }finally{
   if (bufferedReader != null){
    try {
     bufferedReader.close();
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
  }

    }
}

Answer 1

By doing a POST this way you're losing the ability to store cookies. You will have to also emulate the authentication mechanism from the server in the WebView. You can directly use POST from WebView with a request body. It appears you're passing the Username and Password via a URL encoded entity which is comptible with the WebView's post method.

Try something like:

String query = "username=" + username + "&password=" + password";
webview.postUrl("http://www.ilias.de/docu/login.php?client_id=docu", query.getBytes());