Upload fail for DrievItems in Drive of SitePages List - microsoft-graph-api

Question

Upload fail for all the DrivesItems in Drive associated with SitePage list in a sharepoint site.
Graph API request:
UploadSession uploadSession = GraphCLient.Sites[{SiteId}].Drives[{DriveId of SitePages List }]. Items[{DriveFolderID}].ItemWithPath(driveItem.Item.Name).CreateUploadSession().Request().PostAsync().Result;
The uploadSession will be created sucessfully but chunkuploadprovider gives error.
Error response: Code: accessDenied Message: The caller does not have
permission to perform the action. Inner error
Code Snippet:
private void UploadItem(OneDriveJsonStructure driveItem)
{
try
{
MemoryStream memStream = (MemoryStream)driveItem.Content;
byte[] buffer = memStream.ToArray();
DriveItem item = null;
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer))
{
UploadSession uploadSession = this._SharepointOperations._GraphCLient.Sites[this._SiteId].Drives[this._DriveId].Items[this._DriveFolderId].ItemWithPath(driveItem.Item.Name).CreateUploadSession().Request().PostAsync().Result;
var provider = new ChunkedUploadProvider(uploadSession, this._SharepointOperations._GraphCLient, memStream);
var chunkRequests = provider.GetUploadChunkRequests();
var readBuffer = new byte[buffer.Length];
var trackedExceptions = new List<Exception>();
DriveItem itemResult = null;
foreach (var request in chunkRequests)
{
// Send chunk request
var result = provider.GetChunkRequestResponseAsync(request, readBuffer, trackedExceptions).Result;
if (result.UploadSucceeded)
{
itemResult = result.ItemResponse;
item = result.ItemResponse;
}
}
if (itemResult == null)
{
UploadChunkResult result = null;
// Retry the upload ...
foreach (var request in chunkRequests)
{
// Send chunk request
result = provider.GetChunkRequestResponseAsync(request, readBuffer, trackedExceptions).Result;
}
item = result.ItemResponse;
}
}
item.Permissions = driveItem.Item.Permissions;
GivePermission(item);
Permission Provide to Client App from Azure AD:
Graph Permission:
Sharepoint Permissions:
Even after all these permissions it gives this error message:
"The caller does not have permission to perform the action".
Which permissions are needed to perform this action?
Upload for driveItems of other drive execute sucessfully.

Answer 1

Now that uploading for driveItems of other drive execute successfully, your code should be OK.
So the key to the issue lies in the user's SharePoint permissions.
Please check if the user account can upload files into the target folder in your SharePoint site.
If the user doesn't have the permission to do that, you need to use an admin account to grant edit permission to the user.
Detailed steps:
Next to the folder name, click the Ellipsis…
On the file popup window, click Share.
On the Share dialog box, click Shared with, and then click
Advanced.
Click Stop Inheriting Permissions.
Add the user into an SharePoint Group which has Edit or Contribute
permission. (If you don't want to modify the default SharePoint
Group, just create a new one)
A quick method: Share this folder (with edit permission) with the user.
Next to the folder name, click the Ellipsis…. On the file popup window, click Share. On the Share dialog box, follow the screenshot.
UPDATE:
Note that we can't upload any documents into Site Pages document library. Using API is also not supported.