I need to load data from an external site. For various reason I can not load it using ajax. I therefore need to do it in C#.

I have followed this guide: https://our.umbraco.com/documentation/reference/routing/custom-controllers

And came up with the following code:

public class HomeController : RenderMvcController
{
    private static readonly HttpClient client = new HttpClient();
    public override ActionResult Index(ContentModel model)
    {
        var responseTask = client.GetStringAsync("https://www.alphavantage.co/query?function=GLOBAL_QUOTE&symbol=AAPL&apikey=XXXXX");
        string response = responseTask.Result;

        var result = JsonConvert.DeserializeObject<Dictionary<string, Dictionary<string, string>>>(response);

        ViewBag.StockPrice = result["Global Quote"]["05. price"];
        return base.Index(model);
    }
}

Is this the preferred way to do it? Or is there a better way?

When doing it this way will the page be cached?