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java – How to HTTPS post in Android

Posted by: admin June 15, 2020 Leave a comment

Questions:

I have looked at the following links, but nothing seems concrete.
Secure HTTP Post in Android
This one does not work anymore, I have tested it and there are comments from other people saying it does not work.

I also checked this out: DefaultHttpClient, Certificates, Https and posting problem! This seems it could work but the blogger just leaves you hanging. More step by step instructions would be helpful. I managed to get my certificate by I have not been able to follow through his second step.

http://www.makeurownrules.com/secure-rest-web-service-mobile-application-android.html This one seem good, but again, I loose the author at the last step: “Back to our original rest client code.” He too is all over the place, I have no clue which libraries he is using. He is not explaining his code and with the

RestTemplate restTemplate = new RestTemplate();

it’s another cliffhanger. Because that class has not been provided. So, if someone could explain how to do HTTPS post request in detail that would be great. I do need to accept the self signed certificate.

How to&Answers:

I hope it would help. This is the code i used and worked perfectly fine.

private HttpClient createHttpClient()
{
    HttpParams params = new BasicHttpParams();
    HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
    HttpProtocolParams.setContentCharset(params, HTTP.DEFAULT_CONTENT_CHARSET);
    HttpProtocolParams.setUseExpectContinue(params, true);

    SchemeRegistry schReg = new SchemeRegistry();
    schReg.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
    schReg.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));
    ClientConnectionManager conMgr = new ThreadSafeClientConnManager(params, schReg);

    return new DefaultHttpClient(conMgr, params);
}

Then create an HttpClient like this: –

HttpClient httpClient = createHttpClient();

and use it with HttpPost.

Cheers!!

EDIT

And i did not used RestTemplate in my code. I made a simple post request. If you need more help just let me know. It seems like i recently have done something similar to what you are looking for.

Answer:

This is the method i used for HTTPS Post and Here i used Custom Certificate, So change the HttpClient assignment with yours own…

public String postData(String url, String xmlQuery) {



        final String urlStr = url;
        final String xmlStr = xmlQuery;
        final StringBuilder sb  = new StringBuilder();



        Thread t1 = new Thread(new Runnable() {

            public void run() {

                HttpClient httpclient = MySSLSocketFactory.getNewHttpClient();

                HttpPost httppost = new HttpPost(urlStr);


                try {

                    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
                            1);
                    nameValuePairs.add(new BasicNameValuePair("xml", xmlStr));

                    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

                    HttpResponse response = httpclient.execute(httppost);

                    Log.d("Vivek", response.toString());

                    HttpEntity entity = response.getEntity();
                    InputStream i = entity.getContent();

                    Log.d("Vivek", i.toString());
                    InputStreamReader isr = new InputStreamReader(i);

                    BufferedReader br = new BufferedReader(isr);

                    String s = null;


                    while ((s = br.readLine()) != null) {

                        Log.d("YumZing", s);
                        sb.append(s);
                    }


                    Log.d("Check Now",sb+"");




                } catch (ClientProtocolException e) {

                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } /*
                 * catch (ParserConfigurationException e) { // TODO
                 * Auto-generated catch block e.printStackTrace(); } catch
                 * (SAXException e) { // TODO Auto-generated catch block
                 * e.printStackTrace(); }
                 */
            }

        });

        t1.start();
        try {
            t1.join();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


        System.out.println("Getting from Post Data Method "+sb.toString());

        return sb.toString();
    }