PnP and chunking causing issues on the SharePoint side of things

[chevol]

We have a strange issue where files less than 10mb are uploaded to SharePoint fine without any issues. However when a file is larger than 10mb and chunking happens then we receive an error. Is this a SharePoint setting that we need to adjust? Is there a way to turn off chunking in PnP? We are using an S3 upload to trigger our lambda function that uses PnP to upload a converted file to Sharepoint (not sure if that matters). I assume its something on the Sharepoint side of things because files less than 10mb work perfectly fine. Has anyone else experienced this before?

The error I get is "fail Specified method is not supported."

[jansenbe]

@chevol : have not heard about this before. Does it repro on all your tenants?

[chevol]

@jansenbe Here is an isolated repo:
https://github.com/chevol/PnpExample/blob/main/PNPSharepointUploader.cs
This works for files that are less then 10mb but anything over *when automatic chunking happens) gives us the "Specified method is not supported" error. Thanks again for you help!

[jansenbe]

@chevol : thanks for sharing the sample, this clarified you're not using PnP Core SDK but PnP Framework instead. A number of things you can try are:

• Replace the method UploadFileAsync with the actual code used in PnP Framework (https://github.com/pnp/pnpframework/blob/dev/src/lib/PnP.Framework/Extensions/FileFolderExtensions.cs#L1459-L1610) and see if that get's you any further. Possibly you can skip the chunked upload all together if that's possible
• Do interop with PnP Core SDK and try our upload:
  • Get a PnPContext from the CSOM ClientContext: https://pnp.github.io/pnpcore/using-the-sdk/basics-pnpframework.html#using-pnp-core-sdk-when-pnp-framework-was-already-configured
  • Load the folder you want to upload to and then perform the upload: https://pnp.github.io/pnpcore/using-the-sdk/files-large.html#uploading-large-files

[chevol]

Thanks @jansenbe I will give that a try and report back so if others experience the same issue they can use this thread as a reference.

[chevol]

@jansenbe I took the first route and replaced the method UploadFileAsync with the actual code used in PnP Framework. Its now working fine and I am not too concerned with chunking since we are going from AWS to SharePoint. Thanks again for the help, maybe a future update could add an option/config to turn chunking off ;)