public static MicrosoftPayProtocolResponse ParseResponse(string jsonDetails)
{
string token = GetTokenFromResponse(jsonDetails);
string[] tokenParts = token.Split('.');
if (tokenParts.Length < 3)
{
throw new MicrosoftPayParseResponseException("Incorrect token format.");
}
string tokenHeadersJson = DecodeBase64UrlString(tokenParts[0]);
string tokenBody = DecodeBase64UrlString(tokenParts[1]);
byte[] tokenSignature = DecodeBase64Url(tokenParts[2]);
MicrosoftPayProtocolResponse result = ParseHeaders(tokenHeadersJson);
result.Token = tokenBody;
return(result);
}
/// <summary>
/// Starts a checkout operation and runs it to completion.
/// </summary>
public static async Task CheckoutAsync(ShoppingCart shoppingCart)
{
Uri merchantUri = new Uri("http://www.contoso.com");
PaymentMerchantInfo merchantInfo = new PaymentMerchantInfo(merchantUri);
PaymentOptions options = new PaymentOptions();
options.RequestShipping = true;
options.ShippingType = PaymentShippingType.Delivery;
options.RequestPayerEmail = PaymentOptionPresence.Optional;
options.RequestPayerName = PaymentOptionPresence.Required;
options.RequestPayerPhoneNumber = PaymentOptionPresence.Optional;
PaymentRequest request = new PaymentRequest(
CreatePaymentDetails(shoppingCart),
SupportedPaymentMethods,
merchantInfo,
options);
IAsyncOperation <PaymentRequestSubmitResult> submitOperation = null;
Action abortSubmitFunc = () =>
{
submitOperation.Cancel();
};
PaymentRequestChangedHandler changedHandler = (sender, args) =>
{
PaymentRequestChangedEventHandler(abortSubmitFunc, args, shoppingCart);
};
PaymentMediator mediator = new PaymentMediator();
submitOperation = mediator.SubmitPaymentRequestAsync(request, changedHandler);
PaymentRequestSubmitResult result = await submitOperation;
if (result.Status != PaymentRequestStatus.Succeeded)
{
string message = result.Status == PaymentRequestStatus.Canceled ?
"The payment was canceled." :
"The payment failed.";
MessageDialog failedMessageDialog = new MessageDialog(message);
await failedMessageDialog.ShowAsync();
return;
}
PaymentResponse response = result.Response;
PaymentToken token = response.PaymentToken;
bool paymentSucceeded = false;
switch (token.PaymentMethodId)
{
case BasicCardPaymentProtocol.PaymentMethodId:
BasicCardResponse basicCardResponse = BasicCardPaymentProtocol.ParseResponse(token.JsonDetails);
//
// TODO: Use data inside 'basicCardResponse' to collect payment.
//
paymentSucceeded = true;
break;
case MicrosoftPayProtocol.PaymentMethodId:
MicrosoftPayProtocolResponse microsoftPayResponse = MicrosoftPayProtocol.ParseResponse(token.JsonDetails);
switch (microsoftPayResponse.Format)
{
case "Stripe":
//
// TODO: Use data inside 'microsoftPayResponse.Token' to collect payment.
//
paymentSucceeded = true;
break;
case "Error":
paymentSucceeded = false;
break;
case "Invalid":
throw new Exception("The payment request was invalid.");
default:
throw new Exception("Unsupported payment gateway.");
}
break;
default:
await result.Response.CompleteAsync(PaymentRequestCompletionStatus.Unknown);
throw new Exception("Unsupported payment method ID.");
}
await result.Response.CompleteAsync(paymentSucceeded?PaymentRequestCompletionStatus.Succeeded : PaymentRequestCompletionStatus.Failed);
string completionMessage = paymentSucceeded ?
"The payment succeeded." :
"Unable to process the payment.";
MessageDialog messageDialog = new MessageDialog(completionMessage);
await messageDialog.ShowAsync();
}
private static MicrosoftPayProtocolResponse ParsePaymentTokenHeaders(JsonReader jsonReader)
{
MicrosoftPayProtocolResponse result = new MicrosoftPayProtocolResponse();
MicrosoftPayErrorInfo errorInfo = new MicrosoftPayErrorInfo();
MicrosoftPayStandardInfo standardInfo = new MicrosoftPayStandardInfo();
while (jsonReader.Read())
{
switch (jsonReader.TokenType)
{
case JsonToken.PropertyName:
string propertyName = (string)jsonReader.Value;
switch (propertyName)
{
case "PayerId":
result.PayerId = jsonReader.ReadAsString();
break;
case "PaymentRequestId":
result.PaymentRequestId = jsonReader.ReadAsString();
break;
case "MerchantId":
result.MerchantId = jsonReader.ReadAsString();
break;
case "Expiry":
result.Expiry = (DateTime)jsonReader.ReadAsDateTime();
break;
case "TimeStamp":
result.TimeStamp = (DateTime)jsonReader.ReadAsDateTime();
break;
case "Format":
result.Format = jsonReader.ReadAsString();
break;
case "ErrorCode":
errorInfo.ErrorCode = jsonReader.ReadAsString();
break;
case "ErrorText":
errorInfo.ErrorText = jsonReader.ReadAsString();
break;
case "ErrorSource":
errorInfo.ErrorSource = jsonReader.ReadAsString();
break;
case "EPK":
standardInfo.EPK = jsonReader.ReadAsString();
break;
case "KeyId":
standardInfo.KeyId = jsonReader.ReadAsString();
break;
case "Nonce":
standardInfo.Nonce = jsonReader.ReadAsString();
break;
case "Tag":
standardInfo.Tag = jsonReader.ReadAsString();
break;
default:
// Ignore extra data.
jsonReader.Read(); // goto value
jsonReader.Skip(); // skip value
break;
}
break;
case JsonToken.EndObject:
switch (result.Format)
{
case "Error":
result.ErrorInfo = errorInfo;
break;
case "Standard":
result.StandardInfo = standardInfo;
break;
}
return(result);
case JsonToken.Comment:
// Do nothing
break;
default:
throw new MicrosoftPayParseResponseException("Incorrect JSON format.");
}
}
throw new MicrosoftPayParseResponseException("Unexpected end of file.");
}
