/// <summary>
/// Retrieves the bearer token from cache.
/// </summary>
/// <param name="authenticationSettings">The authentication settings.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">authenticationSettings.Username
/// or
/// authenticationSettings.TenantName
/// or
/// refreshToken</exception>
public static AccessTokenResponse RetrieveBearTokenFromCache(Oauth2AuthenticationSettings authenticationSettings)
{
if (string.IsNullOrEmpty(authenticationSettings.Username))
{
throw new ArgumentNullException("authenticationSettings.Username");
}
if (string.IsNullOrEmpty(authenticationSettings.TenantName))
{
throw new ArgumentNullException("authenticationSettings.TenantName");
}
string key = string.Concat("AuthHash:", EncryptionHelper.Md5Encryption.GetMd5Hash(string.Concat(authenticationSettings.TenantName, authenticationSettings.Username)));
//Cache Token in Memory
var memoryCachingService = new MemoryCacheProvider();
var accessTokenResponse = memoryCachingService.Fetch <AccessTokenResponse>(key);
//If token is within the threshold of expiring get refresh token.
var timspan = accessTokenResponse.ExpiresOn - DateTime.Now;
//if (accessTokenResponse.ExpiresOn >= DateTime.Now - SecurityTokenConstants.TokenLifeTimeEndOfLifeThreshold)
if (timspan > new TimeSpan(0, 0, 0, 0) && timspan < SecurityTokenConstants.TokenLifeTimeEndOfLifeThreshold)
{
accessTokenResponse = RetrieveNewRefreshBearToken(authenticationSettings, accessTokenResponse.RefreshToken);
}
return(accessTokenResponse);
}