c# - purchase.products.get 忽略 productId 值并在 ProductPurchase 中返回 null

Question

我正在向 google Android Publisher api 提出请求检查提供的应用内购买的 purchaseToken 是否正确。第一个问题是产品 ID 被忽略，我可以输入任何内容作为参数。只需要包名和purchaseToken是正确的。其次，为什么 ProductPurchase 中的 productId 和 purchaseToken 为空。我想检查提供的 purchaseToken 是否与 productId 匹配。当 productId 可以是任何东西并且没有返回响应时，我如何检查这对于特定的应用内购买 productId 是否有效？

    private static Task<ProductPurchase> GetInAppPurchase(string packageName, string productId, string purchaseToken)
    {
        GoogleCredential credential;
        using (Stream stream = new FileStream(@"api.json", FileMode.Open, FileAccess.Read, FileShare.Read))
        {
            credential = GoogleCredential.FromStream(stream);
        }

        string[] scopes = {
            AndroidPublisherService.Scope.Androidpublisher
        };
        credential = credential.CreateScoped(scopes);

        BaseClientService.Initializer initializer = new BaseClientService.Initializer()
        {
            HttpClientInitializer = credential,
            ApplicationName       = "My Application"
        };
        
        
        
        AndroidPublisherService service = new AndroidPublisherService(initializer);

        return service.Purchases.Products.Get(packageName, productId, purchaseToken).ExecuteAsync();
    }

    private static void TestGooglePlayPurchaseApi()
    {
        string packageName = "validPackageName";
        string productId   = "validOrInvalidProductName";
        string purchaseToken = "validPurchaseToken";

        ProductPurchase purchase = GetInAppPurchase(packageName, productId, purchaseToken).Result;

        Console.WriteLine("Kind: " + purchase.Kind);
        Console.WriteLine("Quantity: " + purchase.Quantity);
        Console.WriteLine("AcknowledgementState: " + purchase.AcknowledgementState!);
        Console.WriteLine("ConsumptionState: " + purchase.ConsumptionState!);
        Console.WriteLine("DeveloperPayload: " + purchase.DeveloperPayload);
        Console.WriteLine("ETag: " + purchase.ETag);
        Console.WriteLine("OrderId: " + purchase.OrderId);
        Console.WriteLine("ProductId: " + purchase.ProductId);
        Console.WriteLine("PurchaseState: " + purchase.PurchaseState!);
        Console.WriteLine("PurchaseToken: " + purchase.PurchaseToken);
        Console.WriteLine("PurchaseType: " + purchase.PurchaseType!);
        Console.WriteLine("RegionCode: " + purchase.RegionCode);
        Console.WriteLine("PurchaseTimeMillis: " + purchase.PurchaseTimeMillis);
        Console.WriteLine("ObfuscatedExternalAccountId: " + purchase.ObfuscatedExternalAccountId);
        Console.WriteLine("ObfuscatedExternalProfileId: " + purchase.ObfuscatedExternalProfileId);
    }

这就是我正在接受的:

Kind: androidpublisher#productPurchase
Quantity:
AcknowledgementState: 1
ConsumptionState: 1
DeveloperPayload: {"developerPayload":"","is_free_trial":false,"has_introductory_price_trial":false,"is_updated":false,"accountId":""}
ETag:
OrderId: YYY.XXXX-XXXX-XXXX-XXXXX
ProductId:
PurchaseState: 0
PurchaseToken:
PurchaseType: 0
RegionCode: PL
PurchaseTimeMillis: 1601915754698
ObfuscatedExternalAccountId:
ObfuscatedExternalProfileId:

为什么 ProductId 为空？

Answer 1

如果您的数据库中只有一项，它将为空。很奇怪，但事实就是如此。
添加同一类别的第二个项目，您将开始获得正确的响应值。