未經授權：訪問被拒絕，因為憑證無效。 用於共享點的 Microsoft Graph API

Question

我正在使用以下代碼：

  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;
    });

當我運行此代碼時，出現此異常：

未經授權：由於憑據無效，訪問被拒絕。 您無權使用您提供的憑據查看此目錄或頁面。 我已設置應用權限https://graph.microsoft.com/Sites.Read.All 。

請幫忙。

Answer 1

查詢 API 當前不支持應用程序身份驗證。 請參閱搜索文檔，您將需要根據您要搜索的內容列出的委派權限：

• 郵件閱讀
• 文件.讀取.全部
• 日歷.閱讀
• ExternalItem.Read.All

旁注，通常授權的格式為“ 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(...)使用應用程序注冊中設置的值（如果您有一個，因為它們是可選的）。

請參閱示例中的代碼片段：

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();