使用 C# 在应用程序购买收据中验证 iOS

Question

我正在使用 C# 网络服务在我的服务器上验证我的 ios in app purchase 收据

通过在 Xcode 中执行以下操作，我得到了字符串形式的收据：

- (void) completeTransaction: (SKPaymentTransaction *)transaction
{
    NSString* receiptString = [[NSString alloc] initWithString:transaction.payment.productIdentifier];

    NSLog(@"%@",receiptString);

    NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];

    NSData *receipt = [NSData dataWithContentsOfURL:receiptURL];

    NSString *jsonObjectString = [receipt base64EncodedStringWithOptions:0];

}

我将该字符串（收据）作为参数发送到我的C# Web 服务。 这是我的网络服务方法：

[WebMethod(Description = "Purchase Item Verify")]
public string PurchaseItem(string receiptData)
 {
    string returnmessage = "";

    try
    {
        var json = "{ 'receipt-data': '" + receiptData + "'}";

        ASCIIEncoding ascii = new ASCIIEncoding();
        byte[] postBytes = Encoding.UTF8.GetBytes(json);

        HttpWebRequest request;
        request = WebRequest.Create("https://sandbox.itunes.apple.com/verifyReceipt") as HttpWebRequest;
        request.Method = "POST";
        request.ContentType = "application/json";
        request.ContentLength = postBytes.Length;

        Stream postStream = request.GetRequestStream();
        postStream.Write(postBytes, 0, postBytes.Length);
        postStream.Close();

        var sendresponse = (HttpWebResponse)request.GetResponse();

        string sendresponsetext = "";
        using (var streamReader = new StreamReader(sendresponse.GetResponseStream()))
        {
            sendresponsetext = streamReader.ReadToEnd();
        }
        returnmessage = sendresponsetext;

    }
    catch (Exception ex)
    {
        ex.Message.ToString();
    }
    return returnmessage;
}

它总是返回{"status":21002}。 我已经搜索了两天，但仍然找不到解决方案。有人可以帮助我，我错了吗？

**我正在沙盒上进行测试，这就是我使用沙盒 URL 的原因。我可以在我的应用中验证交易收据。

Answer 1

我有办法

对我有用的最终代码是：

 public string PurchaseItem(string receiptData)
{
    string returnmessage = "";
    try
    {
       // var json = "{ 'receipt-data': '" + receiptData + "'}";

        var json = new JObject(new JProperty("receipt-data", receiptData)).ToString();

        ASCIIEncoding ascii = new ASCIIEncoding();
        byte[] postBytes = Encoding.UTF8.GetBytes(json);

      //  HttpWebRequest request;
        var request = System.Net.HttpWebRequest.Create("https://sandbox.itunes.apple.com/verifyReceipt");
        request.Method = "POST";
        request.ContentType = "application/json";
        request.ContentLength = postBytes.Length;

        //Stream postStream = request.GetRequestStream();
        //postStream.Write(postBytes, 0, postBytes.Length);
        //postStream.Close();

        using (var stream = request.GetRequestStream())
        {
            stream.Write(postBytes, 0, postBytes.Length);
            stream.Flush();
        }

      //  var sendresponse = (HttpWebResponse)request.GetResponse();

        var sendresponse = request.GetResponse();

        string sendresponsetext = "";
        using (var streamReader = new StreamReader(sendresponse.GetResponseStream()))
        {
            sendresponsetext = streamReader.ReadToEnd().Trim();
        }
        returnmessage = sendresponsetext;

    }
    catch (Exception ex)
    {
        ex.Message.ToString();
    }
    return returnmessage;

花两天半的时间只是为了改变一种方法。感谢上帝。

Answer 2

这是一个使用 HTTPClient 的替代异步实现：

public static async Task<string> CheckReceiptWithAppStore()
    {
        string responseStr = null;

        string uri = "https://sandbox.itunes.apple.com/verifyReceipt";

        string receiptData = // Get your receipt from wherever you store it

        var json = new JObject(new JProperty("receipt-data", receiptData), 
            new JProperty("password", "paste-your-shared-secret-here")).ToString();

        using (var httpClient = new HttpClient())
        {        

            if (receiptData != null)
            {
                HttpContent content = new StringContent(json);

                try
                {
                    Task<HttpResponseMessage> getResponse = httpClient.PostAsync(uri, content);
                    HttpResponseMessage response = await getResponse;
                    responseStr = await response.Content.ReadAsStringAsync();
                }
                catch (Exception e)
                {
                    Console.WriteLine("Error verifying receipt: " + e.Message);
                }
            }
        }

        return responseStr;
    }

非订阅购买不需要共享密钥。

Answer 3

对于管理订阅，@Jerry Naing 的回答还需要提供您的共享密钥（可以从 iTunes Connect 检索/生成）。包含它的最简单方法是在定义 json var 的行中添加一个附加属性。

var json = new JObject(new JProperty("receipt-data", receiptData), new JProperty("password", "put_your_shared_secret_here")).ToString();

未能提供共享密钥将导致 21004 状态响应。

Answer 4

此代码示例对我也有帮助，可能对其他人有所帮助：For C# developers there is a useful open-source project called APNS-Sharp which includes receipt verification code that works in ASP.NET. In particular, the Receipt.cs and ReceiptVerification.cs files in the Jdsoft.Apple.AppStore directory

从这个关于 Xamarin 的页面找到它：inapp purcasing ios Transactions and Verification