(PowerBuilder) 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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integer li_rc
oleobject loo_Json
oleobject loo_Http
string ls_Resp
integer i
integer li_NumItems
integer li_BGetMore
string ls_NextLink

// 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
loo_Json = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")
if li_rc < 0 then
    destroy loo_Json
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Json.UpdateString("client_id","2871da2c-8176-4b7f-869b-2311aa82e743")
loo_Json.UpdateString("client_secret","2hu9Q~~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH")
loo_Json.UpdateString("scope","https://graph.microsoft.com/.default")
loo_Json.UpdateString("token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token")

loo_Http = create oleobject
// Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")

loo_Http.AuthToken = loo_Json.Emit()

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

loo_Json.EmitCompact = 0

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

do while (li_BGetMore = 1)

    // Get the next chunk of DriveItems
    ls_Resp = loo_Http.QuickGetStr(ls_NextLink)
    if loo_Http.LastMethodSuccess <> 1 then
        Write-Debug loo_Http.LastErrorText
        destroy loo_Json
        destroy loo_Http
        return
    end if

    // The response should be JSON.
    loo_Json.Load(ls_Resp)

    // A successful response should return a status code of 200.
    if loo_Http.LastStatus <> 200 then
        Write-Debug loo_Json.Emit()
        Write-Debug "Response status = " + string(loo_Http.LastStatus)
        destroy loo_Json
        destroy loo_Http
        return
    end if

    // Iterate over the DriveItems in the JSON response:
    i = 0
    li_NumItems = loo_Json.SizeOfArray("value")
    do while i < li_NumItems
        loo_Json.I = i
        Write-Debug "name: " + loo_Json.StringOf("value[i].name")
        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 loo_Json.HasMember("~"@odata.nextLink~"") = 1 then
        ls_NextLink = loo_Json.StringOf("~"@odata.nextLink~"")
        Write-Debug "nextLink: " + ls_NextLink
    else
        li_BGetMore = 0
    end if

loop


destroy loo_Json
destroy loo_Http