Minimal Java client for Jira plugin upload via UPM + Apache HttpClient)

Test.java

package pmpshk.atlassian.upm;

import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;


import java.io.File;
import java.io.IOException;

public class Test {

	public static void main(String[] args) throws IOException {
		uploadPlugin(new File("e:\\inspections\\target\\inspections-1.0.22-SNAPSHOT.jar"));
	}

	final static String baseUrl = "http://localhost";

	public static JSONObject uploadPlugin(File pluginJarFile) throws IOException {
		// 1. Получение upm-token
		HttpGet get = new HttpGet(baseUrl + "/rest/plugins/1.0/");
		get.addHeader("X-Atlassian-Token", "no-check");
		get.addHeader(BasicScheme.authenticate(
			new UsernamePasswordCredentials("username", "password"), "UTF-8", false));

		try (CloseableHttpClient client = HttpClients.createDefault();
			 CloseableHttpResponse response = client.execute(get)) {

			String upmToken = response.getFirstHeader("upm-token").getValue();

			// 2. Загрузка плагина
			HttpPost post = new HttpPost(baseUrl + "/rest/plugins/1.0/?token=" + upmToken);
			post.addHeader("X-Atlassian-Token", "no-check");

			MultipartEntityBuilder builder = MultipartEntityBuilder.create();
			builder.addBinaryBody("plugin", pluginJarFile, ContentType.DEFAULT_BINARY, pluginJarFile.getName());
			post.setEntity(builder.build());

			try (CloseableHttpResponse uploadResponse = client.execute(post)) {
				String result = EntityUtils.toString(uploadResponse.getEntity());
				return new JSONObject(result); // Используем org.json
			}
		}
	}

}