public static Forecast GetForecast(string accessToken, string userId)
{
AWSXRayRecorder.Instance.BeginSubsegment("MyBudgetExplorer.Models.Cache.GetForecast()");
try
{
var binaryFormatter = new BinaryFormatter();
var aesKey = SHA256.Create().ComputeHash(Encoding.UTF8.GetBytes(userId));
var aesIV = MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(userId));
var hash = BitConverter.ToString(aesKey).Replace("-", "").ToLower();
var fileName = $"forecast.{hash}";
var tempFilePath = Path.Combine(Path.GetTempPath(), fileName);
byte[] encrypted = null;
// Local File
Forecast forecast = GetLocalForecast(userId);
if (forecast != null)
{
return(forecast);
}
// Create Forecast
forecast = Forecast.Create(accessToken, userId);
// Serialize & Encrypt Forecast
using (var ms = new MemoryStream())
{
binaryFormatter.Serialize(ms, forecast);
encrypted = EncryptAES(ms.ToArray(), aesKey, aesIV);
}
// Store Local File
if (encrypted != null && encrypted.Length > 0)
{
File.WriteAllBytes(tempFilePath, encrypted);
File.SetCreationTimeUtc(tempFilePath, forecast.LastModifiedOn);
File.SetLastWriteTimeUtc(tempFilePath, forecast.LastModifiedOn);
}
return(forecast);
}
catch (Exception e)
{
AWSXRayRecorder.Instance.AddException(e);
throw;
}
finally
{
AWSXRayRecorder.Instance.EndSubsegment();
}
}