public async Task <string> GetTokenAsync()
{
if (!this.token.IsValidAndNotExpiring)
{
this.token = await this.GetNewTokenAsync();
}
return(token.AccessToken);
}
private async Task <CognitoToken> GetNewTokenAsync()
{
CognitoToken token = null;
var _client = new HttpClient();
var clientId = this.cognitoSettings.Value.ClientId;
var clientSecret = this.cognitoSettings.Value.ClientSecret;
var clientCreds = System.Text.Encoding.UTF8.GetBytes($"{clientId}:{clientSecret}");
var path = "oauth2/token";
//_client.BaseAddress = new Uri(this.cognitoSettings.Value.TokenUrl);
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(clientCreds));
var postMessage = new Dictionary <string, string>();
postMessage.Add("grant_type", "client_credentials");
postMessage.Add("scope", "");
var request = new HttpRequestMessage(HttpMethod.Post, this.cognitoSettings.Value.TokenUrl + path)
{
Content = new FormUrlEncodedContent(postMessage)
};
try
{
HttpResponseMessage response = await _client.SendAsync(request);
if (response.IsSuccessStatusCode)
{
var result = await response.Content.ReadAsStringAsync();
token = JsonConvert.DeserializeObject <CognitoToken>(result);
token.ExpiresAt = DateTime.UtcNow.AddSeconds(token.ExpiresIn);
}
else
{
throw new Exception(response.ReasonPhrase);
}
}
catch (Exception ex)
{
throw ex;
}
return(token);
}