(Classic ASP) 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
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json = Server.CreateObject("Chilkat.JsonObject")
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")

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Http")
set http = Server.CreateObject("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")

json.EmitCompact = 0

' This loop will download DriveItems in sets of 25 until no more exist.
bGetMore = 1
' (Add the $top query parameter to define the page size, i.e. the max number of results to return).
nextLink = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:{$item_path}:/children?$top=25"

Do While (bGetMore = 1)

    ' Get the next chunk of DriveItems
    resp = http.QuickGetStr(nextLink)
    If (http.LastMethodSuccess <> 1) Then
        Response.Write "<pre>" & Server.HTMLEncode( http.LastErrorText) & "</pre>"
        Response.End
    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
        Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"
        Response.Write "<pre>" & Server.HTMLEncode( "Response status = " & http.LastStatus) & "</pre>"
        Response.End
    End If

    ' Iterate over the DriveItems in the JSON response:
    i = 0
    numItems = json.SizeOfArray("value")
    Do While i < numItems
        json.I = i
        Response.Write "<pre>" & Server.HTMLEncode( "name: " & json.StringOf("value[i].name")) & "</pre>"
        i = i + 1
    Loop

    ' 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""") = 1) Then
        nextLink = json.StringOf("""@odata.nextLink""")
        Response.Write "<pre>" & Server.HTMLEncode( "nextLink: " & nextLink) & "</pre>"
    Else
        bGetMore = 0
    End If

Loop

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