client = new OkHttpClient.Builder().build();
  }

  public void makeCall(HttpUrl url) throws IOException {
    try (Response response = client.newCall(new Request(url, Headers.EMPTY, "GET", null)).execute()) {
      System.out.println(response.body().string());
    }
  }

        byte[] dk = deriveKeyAES(baseKey, cst); // Checksum key
        try {
            Mac m = Mac.getInstance("HmacSHA1");
            m.init(new SecretKeySpec(dk, HMAC_KEY));
            System.arraycopy(m.doFinal(input), 0, output, 0, 12);
            return output;
        } finally {
            Arrays.fill(dk, 0, dk.length, (byte) 0);
        }
    }

    /**

Fess also contains a Crawler, which can crawl documents on a [web server](https://fess.codelibs.org/15.3/admin/webconfig-guide.html), [file system](https://fess.codelibs.org/15.3/admin/fileconfig-guide.html), or [Data Store](https://fess.codelibs.org/15.3/admin/dataconfig-guide.html) (such as a CSV or database)....

 */
public class UploadForm {

    /**
     * The dictionary ID that identifies which character mapping dictionary configuration to update.
     * This ID corresponds to a specific character mapping dictionary instance in the system.
     */
    @Required
    public String dictId;

    /**
     * The multipart file containing the character mapping rules to be uploaded.

 */
public class UploadForm {

    /**
     * The dictionary ID that identifies which synonym dictionary configuration to update.
     * This ID corresponds to a specific synonym dictionary instance in the system.
     */
    @Required
    public String dictId;

    /**
     * The multipart file containing the synonym mappings to be uploaded.
     * This file should contain synonym definitions in the appropriate format.

            }

            private String getFromCache(final String propertyKey) {
                try {
                    return cache.get(propertyKey,
                            () -> System.getProperty(Constants.FESS_CONFIG_PREFIX + propertyKey, super.get(propertyKey)));
                } catch (final ExecutionException e) {
                    return super.get(propertyKey);
                }
            }

        .build();

    Call call = client.newCall(new Request.Builder()
        .url(server.url("/"))
        .build());
    Response response = call.execute();
    System.out.println(response.handshake().tlsVersion());
  }

  public static void main(String... args) throws Exception {
    new HttpsServer().run();
  }

            }
            SMBUtil.writeInt4(this.signSequence, data, index);
            update(data, offset, length);
            System.arraycopy(digest(), 0, data, index, 8);
            if (this.bypass) {
                this.bypass = false;
                System.arraycopy("BSRSPYL ".getBytes(), 0, data, index, 8);
            }
        } catch (final Exception ex) {
            log.error("Signature failed", ex);

            byte[] ciphertext = cipher.doFinal(plaintextBytes);

            // Combine IV and ciphertext
            byte[] result = new byte[GCM_IV_SIZE + ciphertext.length];
            System.arraycopy(iv, 0, result, 0, GCM_IV_SIZE);
            System.arraycopy(ciphertext, 0, result, GCM_IV_SIZE, ciphertext.length);

            return result;

        } finally {
            // Securely wipe plaintext bytes - guaranteed by try-finally

That way, you can create a token with an expiration of, let's say, 1 week. And then when the user comes back the next day with the token, you know that user is still logged in to your system.