req.threshold(0); // always create tmp file

        // ## Act ##
        long before = countTmpFiles();
        logger.info("Before request. Number of temp files: " + before);
        req.execute(res -> {
            logger.info("Processing request. Number of temp files: " + countTmpFiles());
        }, e -> {});
        long after = countTmpFiles();

import org.junit.Test;

public class CurlTest {
    private static final Logger logger = Logger.getLogger(CurlTest.class.getName());

    @Test
    public void test_Get() {
        Curl.get("https://www.codelibs.org/").execute(response -> {
            final String content = response.getContentAsString();
            logger.info(content);
            assertTrue(content.length() > 0);
        }, e -> {

      this License, without any additional terms or conditions.
      Notwithstanding the above, nothing herein shall supersede or modify
      the terms of any separate license agreement you may have executed
      with Licensor regarding such Contributions.

   6. Trademarks. This License does not grant permission to use the trade
      names, trademarks, service marks, or product names of the Licensor,

            } finally {
                if (connection != null) {
                    connection.disconnect();
                }
            }
        };
        if (threadPool != null) {
            threadPool.execute(task);
        } else {
            task.run();
        }
    }

    protected HttpURLConnection open(final URL u) throws IOException {