upload file to sharepoint in D365FO x++ code

-------------------------------blog1-------------------------------------------------------------
  
//Here is the code snippet to upload file into sharepoint site using x++ code D365FO.

     public void uploadFiletoSharepoint()
    { 
  
    //upload to sharepoint site

        str site = '/Sites/TestSharepointSite';
        str folder = 'TestDocumentLibrary/TestFolder';
        System.UriBuilder builder = new System.UriBuilder('Test.sharepoint.com');
        str host = builder.Host;
        str extId = xUserInfo::getCurrentUserExternalId();
        str filename = 'Testdata.csv';

        SharePointDocumentStorageProvider storageProvider =
            new SharePointDocumentStorageProvider(host, site, folder, extId);

        storageProvider.ProviderId = DocuStorageProviderType::SharePoint;
         
        memoryStream.Position = 0;

        boolean fileExists;
         
        fileExists = storageProvider.FileExists(filename);
        if(fileExists)
        {
         
            if(memoryStream.Length  > 0  )
            {
                storageProvider.SaveFileWithOverwrite(newGuid(), filename, 'application/csv', memoryStream);
            }
        }
        else
        {
            if(memoryStream.Length  > 0  )
            {
                storageProvider.SaveFile(newGuid(), filename, 'application/csv', memoryStream);
            }
  }

    }
-----------------------------------------blog 2----------------------------------------------------

//Now, let’s determine the specific SharePoint paths by splitting up the address. That would be…
//SharePoint server: d365dev.sharepoint.com
//SharePoint site: sites/Test-Site
//SharePoint folder path: Shared Documents/Invoices

//One important thing to note: to use the D365fFO framework, it requires a D365fFO user who has a //so-called “ExternalId”.

//The function could then look like this:

protected void uploadToSharepoint(DocuRef _docuRef)
{
    str filename;
    str fileContetType;
    str externalId;
    System.IO.Stream fileStream;
    DocuValue docuValue = _docuRef.docuValue();

    const str defaultSPServer = 'd365dev.sharepoint.com';
    const str spSite = 'sites/Test-Site';
    const str spFolderPath = 'Shared Documents/Invoices';

    filename = docuValue.filename();
    fileContetType = System.Web.MimeMapping::GetMimeMapping(filename);

    // Get the file stream of the document attachment.
    fileStream = DocumentManagement::getAttachmentStream(_docuRef);
    // Specify a user who has an External Id.
    externalId = xUserInfo::getExternalId(curUserId());

    // Instantiate SharePoint document storage provider with sharepoint address path.
    Microsoft.Dynamics.AX.Framework.FileManagement.IDocumentStorageProvider storageProvider = new Microsoft.Dynamics.AX.Framework.FileManagement.SharePointDocumentStorageProvider(
        defaultSPServer,
        spSite,
        spFolderPath,
        externalId);

    storageProvider.ProviderId = DocuStorageProviderType::SharePoint;

    if (storageProvider != null)
    {
        // Generates a unique file name in case the file name already exists on SharePoint path.
        str uniqueFilename = storageProvider.GenerateUniqueName(filename);
        // Upload file to SharePoint Online path.
        Microsoft.Dynamics.AX.Framework.FileManagement.DocumentLocation location = storageProvider.SaveFile(
            docuValue.FileId,
            uniqueFilename,
            fileContetType,
            fileStream);

        if (location != null)
        {
            info(strFmt("File path: %1", location.get_NavigationUri().ToString()));
        }
    }
}