Microsoft Graph API Download File content return Unauthorized 401

Question

I\'m trying to download a file from SharePoint Online using an \"app only\" token. I can obtain file info using this url

https://graph.microsoft.com:443/v1.0         


        

Answer 1

I have executed the same example that initially failed and now works, at least in the two tenants that I have.

I have not changed any configuration or source code, so it seems that it was a temporary problem that has been fixed.

Answer 2

This bug appeared wednesday last week, and is spreading to more and more of our tenants. It appears that temporary tokens generated by the Graph API/Sharepoint API are invalid. This affects:

• Chunked file upload, as you receice an url to upload to with a temporary token
• @microsoft.graph.downloadUrl as it contains a temporary token
• Content download, as it uses the excact same url as @microsoft.graph.downloadUrl

Please fix this ASAP, as my application is cripled and the customers are angry

I created a post here too, but no response: Temporary tokens issued by graph api is invalid since wednesday

Also this bug appeared wednesday: Unable to set fileSystemInfo.lastModifiedDateTime on files on Sharepoint Online for some users since wednesday

Did you find anything on this Mark LeFleur?

Answer 3

You should use the @microsoft.graph.downloadUrl property obtained from the /v1.0/me/drive/list/items/x/driveItem response to get an app-only url to the file. A GET request wil allow you to download the file.

See https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/resources/driveitem#instance-attributes