async internal static Task GetHistoricValues(int granularity, string currency_pair)
{
String URL = "https://api.gdax.com/products/" + currency_pair + "/candles";
if (granularity != 0)
{
URL += "?granularity=" + granularity; //https://api.gdax.com/products/ETH-EUR/candles?granularity=60
}
HttpClient httpClient = new HttpClient();
//Add a user-agent header to the GET request.
var headers = httpClient.DefaultRequestHeaders;
//The safe way to add a header value is to use the TryParseAdd method and verify the return value is true,
//especially if the header value is coming from user input.
string header = "ie";
if (!headers.UserAgent.TryParseAdd(header))
{
throw new Exception("Invalid header value: " + header);
}
header = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)";
if (!headers.UserAgent.TryParseAdd(header))
{
throw new Exception("Invalid header value: " + header);
}
Uri requestUri = new Uri(URL);
HttpResponseMessage httpResponse = new HttpResponseMessage();
string response = "";
try {
//Send the GET request
httpResponse = await httpClient.GetAsync(requestUri);
httpResponse.EnsureSuccessStatusCode();
response = await httpResponse.Content.ReadAsStringAsync();
var data = JRaw.Parse(response);
int count = ((JContainer)data).Count;
pp.Clear();
//List<PricePoint> p = new List<PricePoint>();
for (int i = 0; i < count; i++)
{
pp.Add(PricePoint.GetPricePoint(data[i], currency_pair));
}
}
catch (Exception ex) {
response = "Error: " + ex.HResult.ToString("X") + " Message: " + ex.Message;
}
}