how to change httpclient to HttpURLConnection

Question

**I have this code and I want to chage the Httpclient to HttpURLConnection , I have a problem with the setEntity method , I did not foud the equivqlent for HttpURLConnection **

public JSONObject postData(JSONObject jOb) throws Throwable {

 // Create a new HttpClient and Post Header

HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("https://www.blabla");

try {
        httppost.setEntity(new StringEntity(jOb.toString()));
        HttpResponse response = httpclient.execute(httppost);
        String responseText = EntityUtils.toString(response.getEntity());
        return new JSONObject(responseText);
     } catch (Throwable e) {
        ControlTable.logErrors(e.toString() + "\t" + jOb.toString(), 32);
        throw e;
     }
}

Take a look here: https://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests?rq=1 — cjnash, May 24 '18 at 14:34
From my experience Apache HTTP Client is much better and usable than HttpUrlConnection. Especially error handling is really a pain with HttpURLConnection. — Robert, May 24 '18 at 15:19

Paraskevas Ntsounos · Answer 1 · 2018-05-24T15:23:50.773

You can use something like:

URL url = new URL("http://www.blabla.com");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);

List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("firstParam", paramValue1));
params.add(new BasicNameValuePair("secondParam", paramValue2));
params.add(new BasicNameValuePair("thirdParam", paramValue3));

OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(
        new OutputStreamWriter(os, "UTF-8"));
writer.write(getQuery(params));
writer.flush();
writer.close();
os.close();

conn.connect();

And also write this function:

private String getQuery(List<NameValuePair> params) throws UnsupportedEncodingException
{
    StringBuilder result = new StringBuilder();
    boolean first = true;

    for (NameValuePair pair : params)
    {
        if (first)
            first = false;
        else
            result.append("&");

        result.append(URLEncoder.encode(pair.getName(), "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(pair.getValue(), "UTF-8"));
    }

    return result.toString();
}

Your answer reads a String from the response, however the question also includes sending a String as the POST body. — Robert, May 24 '18 at 15:18

how to change httpclient to HttpURLConnection

1 Answers1