(Xojo Plugin) OneDrive -- List Large Directory

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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 v9.5.0.97 or greater.

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// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example uses the OAuth client credentials flow.
// See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

// Use your client ID, client secret, and tenant ID in the following lines
Dim json As New Chilkat.JsonObject
Dim success As Boolean
success = json.UpdateString("client_id","2871da2c-8176-4b7f-869b-2311aa82e743")
success = json.UpdateString("client_secret","2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH")
success = json.UpdateString("scope","https://graph.microsoft.com/.default")
success = json.UpdateString("token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token")

Dim http As New Chilkat.Http
http.AuthToken = json.Emit()

// This example will get the DriveItems in /lots-of-files, which has 450 children..
success = http.SetUrlVar("item_path","/lots-of-files")
success = http.SetUrlVar("user_id","4fe732c3-322e-4a6b-b729-2fd1eb5c6104")

Dim resp As String
Dim i As Int32
Dim numItems As Int32

json.EmitCompact = False

// This loop will download DriveItems in sets of 25 until no more exist.
Dim bGetMore As Boolean
bGetMore = True
// (Add the $top query parameter to define the page size, i.e. the max number of results to return).
Dim nextLink As String
nextLink = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:{$item_path}:/children?$top=25"

While (bGetMore = True)

    // Get the next chunk of DriveItems
    resp = http.QuickGetStr(nextLink)
    If (http.LastMethodSuccess <> True) Then
        System.DebugLog(http.LastErrorText)
        Return
    End If

    // The response should be JSON.
    success = json.Load(resp)

    // A successful response should return a status code of 200.
    If (http.LastStatus <> 200) Then
        System.DebugLog(json.Emit())
        System.DebugLog("Response status = " + Str(http.LastStatus))
        Return
    End If

    // Iterate over the DriveItems in the JSON response:
    i = 0
    numItems = json.SizeOfArray("value")
    While i < numItems
        json.I = i
        System.DebugLog("name: " + json.StringOf("value[i].name"))
        i = i + 1
    Wend

    // If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems.
    // Otherwise, exit the loop.
    If (json.HasMember("""@odata.nextLink""") = True) Then
        nextLink = json.StringOf("""@odata.nextLink""")
        System.DebugLog("nextLink: " + nextLink)
    Else
        bGetMore = False
    End If

Wend