Android Https Post and Get

Yesterday, i have done an piratical test for an interview. The task provided is to post a username and password to an https url and also to  get the response results using an https connection in another url. I have successfully completed the task, but it took me around five hours. I wasted lot of time in researching on how to do an https post. Therefore i thought i could share some of the important information, so that it will we helpful for some one. please not i am not going to share the entire solution.

First create an custom socket factory inside your package. Use the below code.

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package baman.lankahomes.lk.zupportdesk;
 
/**
* Created by baman on 6/13/16.
*/
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
 
import org.apache.http.conn.ssl.SSLSocketFactory;
 
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
 
public class MySSLSocketFactory extends SSLSocketFactory {
    SSLContext sslContext = SSLContext.getInstance("TLS");
 
    public MySSLSocketFactory(KeyStore truststore) throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
        super(truststore);
 
        TrustManager tm = new X509TrustManager() {
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }
 
            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }
 
            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };
 
        sslContext.init(null, new TrustManager[] { tm }, null);
    }
 
    @Override
    public Socket createSocket(Socket socket, String host, int port, boolean autoClose) throws IOException, UnknownHostException {
        return sslContext.getSocketFactory().createSocket(socket, host, port, autoClose);
    }
 
    @Override
    public Socket createSocket() throws IOException {
        return sslContext.getSocketFactory().createSocket();
    }
}

Add this function inside your MainActivity class to create a httpClient using custom socket factory. As shown in the below code.

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    public HttpClient getNewHttpClient() {
        try {
            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
            trustStore.load(null, null);
 
            MySSLSocketFactory sf = new MySSLSocketFactory(trustStore);
            sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
 
            HttpParams params = new BasicHttpParams();
            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
            HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
 
            SchemeRegistry registry = new SchemeRegistry();
            registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
            registry.register(new Scheme("https", sf, 443));
 
            ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);
            return new DefaultHttpClient(ccm, params);
        } catch (Exception e) {
            return new DefaultHttpClient();
        }
    }

Then Run an Async task for https post like this.

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//Async tak to UserToken
    class getToken extends AsyncTask<String, Void, String> {
 
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(MainActivity.this);
            pDialog.setMessage("Please wait. Logging in...");
            pDialog.show();
        }
 
            @Override
            protected String doInBackground(String... arg0) {
 
                try {
                    //Post Username and password
                    HttpClient httpclient = getNewHttpClient();
                    HttpPost httppost = new HttpPost(BASEURL);
                    List<BasicNameValuePair> nameValuePairs = new ArrayList<>(1);
                    nameValuePairs.add(new BasicNameValuePair("Email", arg0[0]));
                    nameValuePairs.add(new BasicNameValuePair("Password", arg0[1]));
 
                    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
 
                    // Execute HTTP Post Request
                    HttpResponse response = httpclient.execute(httppost);
                    HttpEntity entity = response.getEntity();
                    String responseString = EntityUtils.toString(entity, "UTF-8");
                    pDialog.dismiss();
                    Log.d("Results ", "tryLogin: "+responseString);
                    return responseString;
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                } catch (ClientProtocolException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
 
                return null;
            }
        }

And if you want to do an https Get request. See the code below

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   class getUserToken extends AsyncTask<String, Void, String> {
 
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(Profile.this);
            pDialog.setMessage("Please wait. Loading data...");
            pDialog.show();
        }
 
        @Override
        protected String doInBackground(String... arg0) {
 
            try {
                // get user token
                HttpClient httpclient = getNewHttpClient();
                HttpGet httpget = new HttpGet(BASEURL);
 
                // Execute HTTP get Request
                HttpResponse response = httpclient.execute(httpget);
                HttpEntity entity = response.getEntity();
                String responseString = EntityUtils.toString(entity, "UTF-8");
                pDialog.dismiss();
                Log.d("Results ", "get login : "+responseString);
                return responseString;
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
 
            return null;
        }
    }

Hope this helps. Feel free to ask any question if you have in the comments section below.Tnx, Happy coding 🙂

I am a mobile application consultant with 7 years of experience in IT industry .

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