content: package openjoe.smart.sso.client.util;
  
  import com.fasterxml.jackson.core.type.TypeReference;
  import openjoe.smart.sso.base.constant.BaseConstant;
  import openjoe.smart.sso.base.entity.Result;
  import openjoe.smart.sso.base.entity.Token;
  import openjoe.smart.sso.base.enums.GrantTypeEnum;
  import openjoe.smart.sso.base.util.HttpUtils;
  import openjoe.smart.sso.base.util.JsonUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * OAuth2辅助类
   *
   * @author Joe
   */
  public class OAuth2Utils {
  
      private static final Logger logger = LoggerFactory.getLogger(OAuth2Utils.class);
  
      /**
       * 获取accessToken（授权码模式）
       * <p>
       * 注：logoutUri为客户端注销token的回调地址，在获取accessToken时顺带传递，
       *     当服务端注销token时，会发起请求通知所有客户端的logoutUri注销token。
       *
       * @param serverUrl
       * @param clientId
       * @param clientSecret
       * @param code
       * @param logoutUri
       * @return
       */
      public static Result<Token> getAccessToken(String serverUrl, String clientId, String clientSecret, String code, String logoutUri) {
          Map<String, String> paramMap = new HashMap<>();
          paramMap.put(BaseConstant.GRANT_TYPE, GrantTypeEnum.AUTHORIZATION_CODE.getValue());
          paramMap.put(BaseConstant.CLIENT_ID, clientId);
          paramMap.put(BaseConstant.CLIENT_SECRET, clientSecret);
          paramMap.put(BaseConstant.AUTH_CODE, code);
          paramMap.put(BaseConstant.LOGOUT_URI, logoutUri);
          return getHttpToken(serverUrl + BaseConstant.ACCESS_TOKEN_PATH, paramMap);
      }
  
      /**
       * 刷新accessToken
       *
       * @param serverUrl
       * @param clientId
       * @param refreshToken
       * @return
       */
      public static Result<Token> getRefreshToken(String serverUrl, String clientId, String refreshToken) {
          Map<String, String> paramMap = new HashMap<>();
          paramMap.put(BaseConstant.CLIENT_ID, clientId);
          paramMap.put(BaseConstant.REFRESH_TOKEN, refreshToken);
          return getHttpToken(serverUrl + BaseConstant.REFRESH_TOKEN_PATH, paramMap);
      }
  
      public static Result<Token> getHttpToken(String url, Map<String, String> paramMap) {
          String jsonStr = HttpUtils.get(url, paramMap);
          if (jsonStr == null || jsonStr.isEmpty()) {
              logger.error("get http token return null. url:{}", url);
              return Result.error("获取token失败");
          }
          Result<Token> result = JsonUtils.parseObject(jsonStr, new TypeReference<Result<Token>>() {
          });
          if (result == null) {
              logger.error("parse accessToken return null. jsonStr:{}", jsonStr);
              return Result.error("解析token失败");
          }
          return result;
      }
  }