content: /*
   * Copyright ©2015-2023 Jaemon. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.github.jaemon.dinger.httpclient;
  
  import com.github.jaemon.dinger.dingtalk.entity.DingText;
  import com.github.jaemon.dinger.dingtalk.entity.Message;
  import com.github.jaemon.dinger.support.sign.SignResult;
  import com.github.jaemon.dinger.wetalk.entity.WeText;
  import org.springframework.http.HttpEntity;
  import org.springframework.http.HttpHeaders;
  import org.springframework.http.MediaType;
  import org.springframework.web.client.RestTemplate;
  
  import javax.crypto.Mac;
  import javax.crypto.spec.SecretKeySpec;
  import java.net.URLEncoder;
  import java.nio.charset.StandardCharsets;
  import java.util.ArrayList;
  import java.util.Base64;
  import java.util.List;
  
  /**
   * HttpClientDingTalkTemplate
   *
   * @author Jaemon
   * @since 1.0
   */
  public class HttpClientDingTalkTemplate {
  
      public static void main(String[] args) throws Exception {
          String tokenId="5ba9b9232rede0e13b87dd6ef90f1fbcfd5e42a81966d1ds441dcec85ddsds10";
          StringBuilder url = new StringBuilder("https://oapi.dingtalk.com/robot/send?access_token=");
          String secret = "AEQ520acbce5db4af557323db5af55d41ee780412efg370b1c1a2f66535f6313255";
          Long timestamp = System.currentTimeMillis();
          String sign = algorithm(timestamp, secret);
          url.append(tokenId).append("&").append("sign=").append(sign)
                  .append("&")
                  .append("timestamp=").append(timestamp);
  
          DingText dingText = new DingText(new DingText.Text("Hello Dinger"));
          dingText.setAt(new Message.At(true));
  
          HttpHeaders headers = new HttpHeaders();
          headers.setContentType(MediaType.APPLICATION_JSON);
  
          HttpEntity<DingText> request = new HttpEntity<>(dingText, headers);
  
          RestTemplate restTemplate = new RestTemplate();
          String response = restTemplate.postForObject(url.toString(), request, String.class);
          System.out.println(response);
  
      }
  
      private static String algorithm(Long timestamp, String secret) throws Exception {
          String stringToSign = timestamp + "\n" + secret;
          Mac mac = Mac.getInstance("HmacSHA256");
          mac.init(
                  new SecretKeySpec(secret.getBytes(StandardCharsets.UTF_8), "HmacSHA256")
          );
          byte[] signData = mac.doFinal(
                  stringToSign.getBytes(StandardCharsets.UTF_8)
          );
          String sign = URLEncoder.encode(
                  Base64.getEncoder().encodeToString(signData),
                  StandardCharsets.UTF_8.name()
          );
          return sign;
      }
  }