未经授权：访问被拒绝，因为凭证无效。 用于共享点的 Microsoft Graph API

Question

我正在使用以下代码：

  string cSecret = "XXXXXXXXXXXX";
    string cId = "XXXXXXXXXXXXXXX";
    var scopes = new string[] { "https://graph.microsoft.com/.default" };
    var confidentialClient = ConfidentialClientApplicationBuilder
  .Create(cId)
  .WithRedirectUri($"https://login.microsoftonline.com/XXXXX.onmicrosoft.com/v2.0")
  .WithClientSecret(cSecret)
  .Build();

    string requestUrl;
    GraphServiceClient graphClient =
    new GraphServiceClient(new DelegateAuthenticationProvider(async (requestMessage) =>
    {
        var authResult = await confidentialClient
.AcquireTokenForClient(scopes)
.ExecuteAsync();

        // Add the access token in the Authorization header of the API request.
        requestMessage.Headers.Authorization =
        new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", authResult.AccessToken);
    }));


    requestUrl = "https://graph.microsoft.com/beta/search/query";

    var searchRequest = new
    {
        requests = new[]
                {
        new
        {
            entityTypes = new[] {"microsoft.graph.driveItem"},
            query = new
            {
                query_string = new
                {
                    query = "policy AND filetype:docx"
                }
            },
            from = 0,
            size = 25
        }
    }
    };
    //construct a request
    var message = new HttpRequestMessage(HttpMethod.Post, requestUrl);
    var jsonPayload = graphClient.HttpProvider.Serializer.SerializeObject(searchRequest);
    message.Content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");
    await graphClient.AuthenticationProvider.AuthenticateRequestAsync(message);
    var response = await graphClient.HttpProvider.SendAsync(message);
    //process response 
    var content = await response.Content.ReadAsStringAsync();
    var result = JObject.Parse(content);
    var searchItems = result["value"].First["hitsContainers"].First["hits"].Select(item =>
    {
        var itemUrl = (string)item["_source"]["webUrl"];
        return itemUrl;
    });

当我运行此代码时，出现此异常：

未经授权：由于凭据无效，访问被拒绝。 您无权使用您提供的凭据查看此目录或页面。 我已设置应用权限https://graph.microsoft.com/Sites.Read.All 。

请帮忙。

Answer 1

查询 API 当前不支持应用程序身份验证。 请参阅搜索文档，您将需要根据您要搜索的内容列出的委派权限：

• 邮件阅读
• 文件.读取.全部
• 日历.阅读
• ExternalItem.Read.All

旁注，通常授权的格式为“ https://login.microsoftonline.com/XXXXX.onmicrosoft.com/v2.0 ”，而不是Redirect Uri 。 您可能需要更改 ConfidentialClientApplicationBuilder 以使用.WithAuthority() 。 然后，您可以使用.WithRedirectUri(...)使用应用程序注册中设置的值（如果您有一个，因为它们是可选的）。

请参阅示例中的代码片段：

var redirectUri = "https://localhost:8080";    
var authority = $"https://login.microsoftonline.com/{config["tenantId"]}/v2.0";

List<string> scopes = new List<string>();
scopes.Add("https://graph.microsoft.com/.default");

var cca = ConfidentialClientApplicationBuilder.Create(clientId)
                                              .WithAuthority(authority)
                                              .WithRedirectUri(redirectUri)
                                              .WithClientSecret(clientSecret)
                                              .Build();