(SQL Server) OneDrive -- List Large Directory

Demonstrates how to get the entire collection of DriveItem children when the collection is large and multiple pages need to be requested. To test this example, I created a DriveItem with 450 children.

Note: This example requires Chilkat v9.5.0.68 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

// Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
//
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @http int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Http', @http OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Use your previously obtained access token here:
    -- See the following examples for getting an access token:
    --    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
    --    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
    --    Refresh Access Token (Azure AD v2.0 Endpoint).
    --    Refresh Access Token (Azure AD Endpoint).

    -- (Make sure your token was obtained with the FilesRead or Files.ReadWrite scope.)
    EXEC sp_OASetProperty @http, 'AuthToken', 'MICROSOFT_GRAPH_ACCESS_TOKEN'

    -- This example will get the DriveItems in /lots-of-files, which has 450 children..
    DECLARE @success int
    EXEC sp_OAMethod @http, 'SetUrlVar', @success OUT, 'item_path', '/lots-of-files'

    DECLARE @resp nvarchar(4000)

    DECLARE @i int

    DECLARE @numItems int

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.JsonObject', @json OUT

    EXEC sp_OASetProperty @json, 'EmitCompact', 0

    -- This loop will download DriveItems in sets of 50 until no more exist.
    DECLARE @bGetMore int
    SELECT @bGetMore = 1
    -- (Add the $top query parameter to define the page size, i.e. the max number of results to return).
    DECLARE @nextLink nvarchar(4000)
    SELECT @nextLink = 'https://graph.microsoft.com/v1.0/me/drive/root:{$item_path}:/children?$top=50'

    WHILE (@bGetMore = 1)
      BEGIN

        -- Get the next chunk of DriveItems
        EXEC sp_OAMethod @http, 'QuickGetStr', @resp OUT, @nextLink
        EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
        IF @iTmp0 <> 1
          BEGIN
            EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @http
            EXEC @hr = sp_OADestroy @json
            RETURN
          END

        -- The response should be JSON.
        EXEC sp_OAMethod @json, 'Load', @success OUT, @resp

        -- A successful response should return a status code of 200.
        EXEC sp_OAGetProperty @http, 'LastStatus', @iTmp0 OUT
        IF @iTmp0 <> 200
          BEGIN
            EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
            PRINT @sTmp0

            EXEC sp_OAGetProperty @http, 'LastStatus', @iTmp0 OUT
            PRINT 'Response status = ' + @iTmp0
            EXEC @hr = sp_OADestroy @http
            EXEC @hr = sp_OADestroy @json
            RETURN
          END

        -- Iterate over the DriveItems in the JSON response:
        SELECT @i = 0
        EXEC sp_OAMethod @json, 'SizeOfArray', @numItems OUT, 'value'
        WHILE @i < @numItems
          BEGIN
            EXEC sp_OASetProperty @json, 'I', @i

            EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'value[i].name'
            PRINT 'name: ' + @sTmp0
            SELECT @i = @i + 1
          END

        -- If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems.
        -- Otherwise, exit the loop.
        EXEC sp_OAMethod @json, 'HasMember', @iTmp0 OUT, '"@odata.nextLink"'
        IF @iTmp0 = 1
          BEGIN
            EXEC sp_OAMethod @json, 'StringOf', @nextLink OUT, '"@odata.nextLink"'

            PRINT 'nextLink: ' + @nextLink
          END
        ELSE
          BEGIN
            SELECT @bGetMore = 0
          END
      END

    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @json


END
GO