使用 iOS Xamarin 解析应用内购买收据的示例？

Question

我正在尝试为我的应用实施购买验证。我看到我可以将购买收据发送到我的服务器以与 Apple 进行验证。但是，我无法找出将 NSData 发布到我的 URL 以进行验证的正确方法。像这样的：

public void CompleteTransaction (SKPaymentTransaction transaction) {
    var productId = transaction.Payment.ProductIdentifier;
    NSUrl receiptURL = NSBundle.MainBundle.AppStoreReceiptUrl;
    NSData theData = NSData.FromUrl (receiptURL);

    RestRequest request = new RestRequest(validationURL, Method.POST);
    request.AddBody(theData); // ??  
    restClient.ExecuteAsync<bool>((response) =>
        {
            FinishTransaction(transaction, response.Data);
        });
}

有人有例子吗？我正在使用 RestSharp。

谢谢！

• 戴夫尔

Answer 1

好的，找到方法了。诀窍是将收据解析成字典，然后从中取出钥匙。示例代码：

public void CompleteTransaction (SKPaymentTransaction transaction) {
    var productId = transaction.Payment.ProductIdentifier;
    NSUrl receiptURL = NSBundle.MainBundle.AppStoreReceiptUrl;
    NSData receipt = NSData.FromUrl (receiptURL);

    // here is the code I was missing
    NSDictionary requestContents = NSDictionary.FromObjectAndKey((NSString)receipt.GetBase64EncodedString(
                NSDataBase64EncodingOptions.None), 
                (NSString)"receipt-data");

    string receiptData = (requestContents["receipt-data"] as NSString).ToString();

    RestRequest request = new RestRequest(<url to your server>, Method.POST);

    request.AddParameter ("receipt-data", receiptData );

    apiClient.ExecuteAsync<bool>(request, (response) => 
        {
            FinishTransaction (transaction, response.Data);
        });

完成后，您可以在 Apple 服务器上进行验证。网上有很多该部分的示例代码。