Question

我跟随aspnet-snippets-sample的例子和OneDriveTest.cs通过Microsoft Graph API将大文件上传到只有应用凭据的共享文件夹

并抛出以下异常：

＆＃34;拒绝访问。您无权执行此操作或访问此资源。＆＃34;

要初始化大型文件上传会话，请执行以下操作：

var uploadSession = await _graph
                           .Drives[DRIVEID]
                           .Items[ITEMID]
                           .ItemWithPath("newFile.docx")
                           .CreateUploadSession()
                           .Request().PostAsync();

driveId和itemId都有效。

我正在创建我的GraphClient，如下所示：

public MicrosoftGraphHelper()
        {

            _graph = new GraphServiceClient("https://graph.microsoft.com/beta",
                new DelegateAuthenticationProvider((requestMessage) =>
            {
                requestMessage.Headers.Authorization = new AuthenticationHeaderValue("bearer", AccessToken);

                return Task.FromResult(0);
            }));

        }

通过我的应用凭据和密钥获取访问令牌。在Azure中，我的应用程序通过Microsoft Graph对文件具有读/写权限。

另外，创建一个新的文件夹，如

POST https://graph.microsoft.com/beta/drives/DRIVEID/items/ITEMID/children

使用JSON

{
  "name": "NewFolderTest",
  "folder": { }
}

也可以。

这是上传任务

internal async Task<string> UploadLargeFile(HttpPostedFileBase file)
        {
            try
            {


                using (Stream fileStream = file.InputStream)
                {
                    // Create the upload session. The access token is no longer required as you have session established for the upload.  
                    // POST /v1.0/drive/root:/UploadLargeFile.bmp:/microsoft.graph.createUploadSession

                    var driveItems = await _graph.Drives[DRIVEID]
                           .Items[ITEMID]
                           .Children
                           .Request()
                           .GetAsync();

                    var uploadSession = await _graph.Drives[DRIVEID]
                        .Items[ITEMID].ItemWithPath("test.docx").CreateUploadSession()
                        .Request().PostAsync();

                    var maxChunkSize = 320 * 1024; // 320 KB - Change this to your chunk size. 5MB is the default.
                    var provider = new ChunkedUploadProvider(uploadSession, _graph, fileStream, maxChunkSize);

                    // Setup the chunk request necessities
                    var chunkRequests = provider.GetUploadChunkRequests();
                    var readBuffer = new byte[maxChunkSize];
                    var trackedExceptions = new List<Exception>();
                    DriveItem itemResult = null;

                    //upload the chunks
                    foreach (var request in chunkRequests)
                    {
                        // Do your updates here: update progress bar, etc.
                        // ...
                        // Send chunk request
                        var result = await provider.GetChunkRequestResponseAsync(request, readBuffer, trackedExceptions);

                        if (result.UploadSucceeded)
                        {
                            itemResult = result.ItemResponse;
                        }
                    }

                    // Check that upload succeeded
                    if (itemResult == null)
                    {
                        // Retry the upload
                        // ...
                    }

                    return "Success";
                }

            }

            catch (ServiceException e)
            {
                // Debug.WriteLine("We could not upload the file: " + e.Error.Message);
                return null;
            }

        }

一旦代码点击：

var result = await provider.GetChunkRequestResponseAsync(request, readBuffer, trackedExceptions);

试图请求：

"https://myapp.sharepoint.com:443/sites/dev/_api/v2.0/drives/DRIVEID/items/ITEMID/uploadSession"

被抛出。

我需要申请所需权限的内容和位置？ Documentation是指Files.ReadWrite Sharepoint是否需要Microsoft Graph API的其他权限？

在共享文件夹中，我可以看到一个新创建的tmp文件，其中包含0个字节。

通过Microsoft Graph API应用程序将大文件上传到共享文件夹仅asp.net访问被拒绝

0 个答案: