(Go) 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
    json := chilkat.NewJsonObject()
    json.UpdateString("client_id","2871da2c-8176-4b7f-869b-2311aa82e743")
    json.UpdateString("client_secret","2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH")
    json.UpdateString("scope","https://graph.microsoft.com/.default")
    json.UpdateString("token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token")

    http := chilkat.NewHttp()
    http.SetAuthToken(json.Emit())

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

    var resp *string = new(string)
    var i int
    var numItems int

    json.SetEmitCompact(false)

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

    for (bGetMore == true) {

        // Get the next chunk of DriveItems
        resp = http.QuickGetStr(*nextLink)
        if http.LastMethodSuccess() != true {
            fmt.Println(http.LastErrorText())
            json.DisposeJsonObject()
            http.DisposeHttp()
            return
        }

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

        // A successful response should return a status code of 200.
        if http.LastStatus() != 200 {
            fmt.Println(*json.Emit())
            fmt.Println("Response status = ", http.LastStatus())
            json.DisposeJsonObject()
            http.DisposeHttp()
            return
        }

        // Iterate over the DriveItems in the JSON response:
        i = 0
        numItems = json.SizeOfArray("value")
        for i < numItems {
            json.SetI(i)
            fmt.Println("name: ", *json.StringOf("value[i].name"))
            i = i + 1
        }

        // 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 {
            nextLink = json.StringOf("\"@odata.nextLink\"")
            fmt.Println("nextLink: ", *nextLink)
        } else {
            bGetMore = false
        }

    }


    json.DisposeJsonObject()
    http.DisposeHttp()