Java HTTP Post postCall(JsonObject json, String url)

Description

post Call

License

Open Source License

Declaration

public static JsonObject postCall(JsonObject json, String url) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

public class Main {
    public static JsonObject postCall(JsonObject json, String url) {
        try {/*from   w w w.ja v a 2s .c o  m*/
            HttpURLConnection connection = getConnection(url);
            try (OutputStreamWriter osw = new OutputStreamWriter(
                    connection.getOutputStream())) {
                osw.write(json.toString());
                osw.flush();
            }
            int responseCode = connection.getResponseCode();
            if (responseCode != 200) {
                System.out
                        .println("Sentinel errored out with response code "
                                + responseCode + " and response message "
                                + connection.getResponseMessage()
                                + " on JSON " + json.toString());
                return null;
            }

            try (InputStreamReader isr = new InputStreamReader(
                    connection.getInputStream())) {
                String response = getString(isr);
                JsonObject rootResponse = new JsonParser().parse(response)
                        .getAsJsonObject();
                return rootResponse;
            }
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    private static HttpURLConnection getConnection(String url)
            throws IOException {
        HttpURLConnection conn = (HttpURLConnection) new URL(url)
                .openConnection();
        conn.setConnectTimeout(10 * 1000);
        conn.setReadTimeout(10 * 1000);
        conn.setDoOutput(true);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/json");
        return conn;
    }

    private static String getString(InputStreamReader isr)
            throws IOException {
        BufferedReader br = new BufferedReader(isr);
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line + "\n");
        }
        br.close();
        return sb.toString();
    }
}

Related

1. post(String url, String postdata, String cookie)
2. Post(URL url, Map fields)
3. post(URL url, Map values)
4. post(URL url, String content)
5. post(URL url, String contentType, byte[] data)
6. postData(Reader data, URL endpoint, Writer output)
7. postForm(String url, Map params)
8. postHTTPQuery(String url, String urlParameters)
9. postJSON(JSONObject job, HttpURLConnection conn)