【Azure Developer】Azure Graph SDK获取用户列表的问题: SDK中GraphServiceClient如何指向中国区的Endpoint：https://microsoftgraph.chinacloudapi.cn/v1.0

问题描述

想通过Java SDK的方式来获取Azure 门户中所列举的用户。一直报错无法正常调用接口，错误信息与AAD登录认证相关，提示tenant not found。

想要实现的目的，通过代码方式获取如下User List（https://portal.azure.cn/#blade/Microsoft_AAD_IAM/UsersManagementMenuBlade/MsGraphUsers）

JAVA 代码

错误截图

如何来解决获取AAD认证的问题呢?

解决方法

在代码中，已经设置了AAD登录Scopes 为China Azure (https://microsoftgraph.chinacloudapi.cn/.default)。 但是GraphServiceClient对象依旧导向到Global的Endpoint，在查看GraphServiceClient的源码发现它为固定值("https://graph.microsoft.com/v1.0")。而该类没有提供可以重写该参数的方法，导致在最终请求时，每次生成的GraphServiceClient对象都无法请求到china的Endpoint。

这也就导致了即使输入正确China AAD认证信息但依旧无法登录成功。最后，找到了一个Graph扩展类中的IGraphServiceClient类，它提供了setServiceRoot的方法，需要引用import com.microsoft.graph.models.extensions.IGraphServiceClient;

然后在代码中修改GraphServiceClient定义（代码中高亮部分）

package GraphTest;

import com.microsoft.graph.auth.confidentialClient.ClientCredentialProvider;
import com.microsoft.graph.auth.enums.NationalCloud;
import com.microsoft.graph.models.extensions.IGraphServiceClient;
import com.microsoft.graph.requests.extensions.GraphServiceClient;
import java.util.ArrayList;

public class TestBase_Customer_Solve {
    private String clientId="";

    private String clientSecret="";
    private String grantType = "client_credentials";
    private String tokenEndpoint = "https://login.partner.microsoftonline.cn/{teantId}/oauth2/v2.0/token";
    private String resourceId = "https://microsoftgraph.chinacloudapi.cn/.default";
    private String teantId = "";

    public IGraphServiceClient graphClient = null;

    public IGraphServiceClient GetClient(boolean authenticate)
    {
        if (graphClient == null) {
            try {
                ArrayList<String> scope = new ArrayList();
                scope.add( resourceId );

                ClientCredentialProvider authProvider = new ClientCredentialProvider(
                        clientId,
                        scope,
                        clientSecret,
                        teantId,
                        NationalCloud.China);

                 graphClient = GraphServiceClient.builder().authenticationProvider( authProvider ).buildClient();
                 graphClient.setServiceRoot( "https://microsoftgraph.chinacloudapi.cn/v1.0" );
                return graphClient;
            }
            catch (Exception e)
            {
                throw new Error("Could not create a graph client: " + e.getLocalizedMessage());

            }

        }
        return null;
    } 
    
}

在修改了Graph Client的Service Root为https://microsoftgraph.chinacloudapi.cn/v1. 最终是成功拿到了Users的列表数据。

参考资料

msgraph-sdk-java-auth：https://github.com/microsoftgraph/msgraph-sdk-java-auth 

GraphServiceClient.java: https://github.com/microsoftgraph/msgraph-sdk-java/blob/4638206053a5545a6d6ba73168337939cde34fed/src/main/java/com/microsoft/graph/requests/GraphServiceClient.java

Get a GraphServiceClient object：https://github.com/microsoftgraph/msgraph-sdk-java#23-get-a-graphserviceclient-object