WTDumper.java

import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map;
import java.util.TreeMap;
import java.util.concurrent.TimeUnit;

/**
 * Dumps data from "browser map" in war thunder into csv-like output (on standard output)
 * @author DoNotRemember <stasikos@gmail.com>
 */
public class WTDumper {

    private static JsonFactory jsonFactory = new JsonFactory();

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws MalformedURLException, InterruptedException, IOException {
        // TODO code application logic here
        String stat = "http://localhost:8111/state";
        String indicators = "http://localhost:8111/indicators";
        boolean header = true;

        Map<String, String> data = new TreeMap<>();
        while (true) {
            requestData(stat, data);
            requestData(indicators, data);
          // Filter some stuff I don't need.
            data.remove("trimmer");
            data.remove("valid");
            data.remove("altitude_min");
            data.remove("altitude_min");
            data.remove("rpm_min");
            data.remove("vario");
            data.remove("weapon1");
            data.remove("weapon2");
            data.remove("weapon3");
            printData(data, header);
            header = false;
            TimeUnit.SECONDS.sleep(1);
        }

    }

    /**
     * get JSON data from url, fill data map and return milliseconds spent
     *
     * @param urlString
     * @param data
     * @return
     */
    public static long requestData(String urlString, Map<String, String> data) throws IOException, InterruptedException {
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        StringBuilder content = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            content.append(line);
        }
//            System.out.println(content);
        reader.close();
        JsonParser parser = jsonFactory.createJsonParser(content.toString());

        while (!parser.isClosed()) {
            JsonToken token = parser.nextToken();
            if (JsonToken.FIELD_NAME.equals(token)) {
                String name = parser.getCurrentName();
                token = parser.nextToken();
                data.put(name, parser.getText());
            }
        }
        return 0;
    }

    private static void printData(Map<String, String> data, boolean header) {
        if (header) {
            StringBuilder headerStr = new StringBuilder();
            for (Map.Entry<String, String> entry : data.entrySet()) {
                headerStr.append("\"").append(entry.getKey()).append("\",");
            }
            header = false;
            System.out.println(headerStr);
        }
        StringBuilder dataStr = new StringBuilder();
        for (Map.Entry<String, String> entry : data.entrySet()) {
            dataStr.append(entry.getValue() + ",");
        }
        System.out.println(dataStr);
    }

}