Getting 409 conflict error with SP REST API v2.1 / Graph API driveItem thumbnail

[michaelmaillot]

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Developer environment

None

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

• browser version: 130.0.2849.56

Describe the bug / error

When querying the driveItem/thumbnails endpoint (GET request), if I use the "preferNoRedirect=true" query string, I'm getting a 409 conflict error.

Example: https://[SITE].sharepoint.com/sites/[SITE_URL]/_api/v2.1/sites/[SITE_ID],[WEB_ID]/lists/[LIST_ID]/items/[ITEM_ID]/driveItem/thumbnails/0/large/content?preferNoRedirect=true

Error displayed:

{
    "error": {
        "code": "resourceModified",
        "message": "The resource has changed since the caller last read it; usually an eTag mismatch"
    }
}

This is something we used without any issue, through PnP Modern Search, for years now, without any trouble or code update. Until recently where we started to face thumbnail display issues.

Here you'll find the issue raised on the PnP Modern Search, facing the same error.

Steps to reproduce

1. Authenticate to a SharePoint site
2. Try to display the thumbnail of a SharePoint page through the mentioned endpoint with same parameter

Expected behavior

I'm expecting to get a thumbnail for the queried SharePoint page.

[Ashlesha-MSFT]

Hello @michaelmaillot,
Thank you for bringing this issue to our attention. We will look into it and get back to you shortly.

[Ashlesha-MSFT]

@michaelmaillot,
just to confirm—are you working with a SharePoint List or a Document Library for this implementation?
Because if i trying to get its response by running query for list in browser it is giving me below error
{"error":
{"code":"invalidRequest",
"message":"The requested item is not a member of a document library
"}
}

[michaelmaillot]

Hi @Ashlesha-MSFT , I'm working with a document library (sorry for missing that info)

[Ashlesha-MSFT]

@michaelmaillot,
I have added image column to document library to get thumbnail but getting NULL values

[michaelmaillot]

You're missing the following part at the end of your query:

/0/large/content?preferNoRedirect=true

This one is triggering the 409 Conflict error.

[Ashlesha-MSFT]

@michaelmaillot,
If I try to access full query, then it is giving me below error

{"error":{"code":"itemNotFound","innerError":{"code":"thumbnailNotFound"},"message":"Item not found"}}

If i try this https://[SITE].sharepoint.com/sites/[SITE_URL]/_api/v2.1/sites/[SITE_ID],[WEB_ID]/lists/[LIST_ID]/items/[ITEM_ID]/driveItem/thumbnails its giving running well with status code 200.

[jimmywim]

I'm getting this same behaviour with some Site Pages across multiple tenancies - the endpoint /0/large/content?preferNoRedirect=true used to just render the image, now we need to remove ?preferNoRedirect which loads the image but redirects.

[Ashlesha-MSFT]

@michaelmaillot, @jimmywim
I observed expected behavior

[jhholm]

This issue can also be seen on standard OTB WebParts that use a similar link to show the thumbnail, like Hero, News webparts and so on.

[jimmywim]

@Ashlesha-MSFT It's only some pages that return an error, not all. You may have to look around tenancies you have access to with the 1st Party web parts like @jhholm mentioned, Hero, News, etc that show no thumbnail.

[Ashlesha-MSFT]

@michaelmaillot, @jhholm,
I followed your suggestion and tried to reproduce the issue.
I found that the only way to upload OTB WebParts like Hero and News is by uploading a .aspx file, which is a site page. I downloaded the site page, but unfortunately, I’m encountering an "Access Denied" error when attempting to upload it to the Document Library.

Could you please let me know if there's an alternative method you're using to add web parts to the Document Library?
Any guidance would be greatly appreciated.