Microsoft Graph download file content returns 404

Question

I tried to download a file with Grpah API.

Tested with API browser, https://graph.microsoft.io/en-us/graph-explorer#

Ran following request, got list of file/fold

Answer 1

It is not supported to perform request to https://graph.microsoft.com/beta/me/drive/items/<itemid>/content endpoint via Graph Explorer.

The request sent to https://graph.microsoft.com/beta/me/drive/items/<itemid>/content endpoint via Grath Explorer is issued as a preflight request. The server responds with 302-Redirect but redirects are not allowed for preflighted requests due to CORS behavior.

Here is a workaround on how to download a file

The following drive item resource request:

https://graph.microsoft.com/beta/me/drive/items/<itemId>

returns @microsoft.graph.downloadUrl annotation which contains the actual link to file resource.

Once the drive item resource is retrieved, perform another GET request to url from @microsoft.graph.downloadUrl to return the actual file.