/// <summary>
/// Makes HttpRequest to mpesa api server
/// </summary>
/// <param name="mpesaDto">Data transfer object</param>
/// <param name="accessToken">Mpesa Accesstoken</param>
/// <param name="mpesaEndpoint">Request endpoint</param>
/// <param name="cancellationToken">Cancellation Token</param>
/// <returns>Mpesa API response based on the API requests made.</returns>
private async Task <T> MpesaPostRequestAsync <T>(object mpesaDto, string accessToken, string mpesaEndpoint, CancellationToken cancellationToken = default) where T : new()
{
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
T result = new();
string json = JsonConvert.SerializeObject(mpesaDto);
var content = new StringContent(json, Encoding.UTF8, "application/json");
cancellationToken.ThrowIfCancellationRequested();
var response = await _client.PostAsync(mpesaEndpoint, content, cancellationToken).ConfigureAwait(false);
if (response.IsSuccessStatusCode)
{
await response.Content.ReadAsStreamAsync().ContinueWith((Task <Stream> stream) =>
{
using var reader = new StreamReader(stream.Result);
using var json = new JsonTextReader(reader);
result = _serializer.Deserialize <T>(json);
}, cancellationToken);
}
else
{
MpesaErrorResponse mpesaErrorResponse = new MpesaErrorResponse();
await response.Content.ReadAsStreamAsync().ContinueWith((Task <Stream> stream) =>
{
using var reader = new StreamReader(stream.Result);
using var json = new JsonTextReader(reader);
mpesaErrorResponse = _serializer.Deserialize <MpesaErrorResponse>(json);
}, cancellationToken);
throw new MpesaAPIException(new HttpRequestException(mpesaErrorResponse.ErrorMessage), response.StatusCode, mpesaErrorResponse);
}
return(result);
}
/// <summary>
/// Method makes the accesstoken request to mpesa api
/// </summary>
/// <param name="consumerKey"></param>
/// <param name="consumerSecret"></param>
/// <param name="mpesaRequestEndpoint"></param>
/// <param name="cancellationToken">Cancellation Token</param>
/// <returns>string representing accesstoken for the mpesa api calls</returns>
private async Task <string> RequestAccessTokenAsync(string consumerKey, string consumerSecret, string mpesaRequestEndpoint, CancellationToken cancellationToken = default)
{
var keyBytes = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{consumerKey}:{consumerSecret}"));
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", keyBytes);
MpesaAccessTokenResponse result = new MpesaAccessTokenResponse();
cancellationToken.ThrowIfCancellationRequested();
var response = await _client.GetAsync(mpesaRequestEndpoint, cancellationToken).ConfigureAwait(false);
if (response.IsSuccessStatusCode)
{
await response.Content.ReadAsStreamAsync().ContinueWith((Task <Stream> stream) =>
{
using var reader = new StreamReader(stream.Result);
using var json = new JsonTextReader(reader);
result = _serializer.Deserialize <MpesaAccessTokenResponse>(json);
}, cancellationToken);
}
else
{
MpesaErrorResponse mpesaErrorResponse = new MpesaErrorResponse();
await response.Content.ReadAsStreamAsync().ContinueWith((Task <Stream> stream) =>
{
using var reader = new StreamReader(stream.Result);
using var json = new JsonTextReader(reader);
mpesaErrorResponse = _serializer.Deserialize <MpesaErrorResponse>(json);
}, cancellationToken);
throw new MpesaAPIException(new HttpRequestException(mpesaErrorResponse.ErrorMessage), response.StatusCode, mpesaErrorResponse);
}
return(result.AccessToken);
}
public MpesaAPIException(Exception ex, HttpStatusCode statusCode, MpesaErrorResponse mpesaErrorResponse) : base(ex.Message)
{
StatusCode = statusCode;
_mpesaErrorResponse = mpesaErrorResponse;
}
