iOS收据验证-自动续订订阅

我在验证自动续订IAP的收据时遇到问题。下面是我验证订阅的代码摘要。我正在为后端使用Parse，其中也包含一些代码。在开发模式中，一切工作都很完美，没有任何问题。它在应用商店和我所有的TestFlight测试人员中都是实时的，一些真正的用户在应用尝试验证时就遇到了崩溃。当我试图将数据保存回Parse时，我看到崩溃来自函数的最末端，它告诉我保存的键为null。（

base64

，

info

，

expirationDate

）

在我的设备上，我有一张沙盒购买收据，我从苹果那里得到一个

21007

响应，试图根据实时URL进行验证。当我切换到沙盒url时，它每次都会验证并工作

另外，我知道以这种方式验证购买是不安全的，我通过我的服务器执行验证，所以没有问题

我想知道我是否错过了一个步骤，我是否应该做些不同的事情

伪代码：

Get the receipt from NSBundle
Get the receipt from Parse database
If neither of them exist:
    end the function
else:
    if Parse receipt exists:
        use it, but first just check the expirationDate stored in Parse
    else:
        use NSBundle receipt for validation, 
    If expired based on date from Parse:
        build request to send to Apple (my server in production)
        Get JSON response, and perform switch statement for response codes
    Check for errors or expiration
    Save new data to Parse // <-- Cause of the crash is here because the keys are null for some users

沙盒URL-

沙盒URL仅在开发模式下使用开发人员证书工作，因此它从服务器获得响应

实时URL-

Live URL仅在具有分发证书的分发模式下工作，因此它在开发模式下不工作，无法返回响应

因此，如果希望在调试模式下使用live URL，则应处理异常

---

如果将Swift与可选绑定一起使用，则可以在不崩溃的情况下进行解析。

我正在处理一个类似的问题。你是怎么想的？@blwinters出于某种奇怪的原因，有时

base64

，

info

和

expirationDate

都是空的。。。所以我的解决方案是在保存之前检查它们是否存在。它们对检查用户的订阅是否仍然返回正确的订阅状态没有影响。留言让我多说几句。好的，这很有道理，谢谢。我使用Swift对所有保存以进行解析的数据进行可选绑定，这样应该可以工作。是的，这会工作的！

PFUser *user = [PFUser currentUser];

//Load the receipt from the app bundle
NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];
NSData *receipt = [NSData dataWithContentsOfURL:receiptURL];

//Load the receipt from Parse, already encoded
NSString *saved64 = user[@"base64"];

//Check for at least one instance of a receipt... Either Parse or appBundle
if (!receipt && saved64.length == 0) {
//if (!receipt) {
    //No receipt
    NSLog(@"No Receipt");
    return;
}

//Base 64 encode appBundle receipt
NSString *receipt64 = [receipt base64EncodedStringWithOptions:0];

//String to hold base64 receipt (either from Parse or appBundle)
NSString *temp64;

//See if Parse base64 exists
if (saved64.length == 0) {
    //Not a receipt in Parse yet, use appBundle
    NSLog(@"Using appBundle receipt.");
    temp64 = receipt64;
} else {
    //Receipt in Parse, use it
    NSLog(@"Using Parse receipt.");
    temp64 = saved64;

    //Check expiration date stored in Parse
    NSDate *parseExpDate = user[@"expirationDate"];
    if ([[self todayGMT] compare:parseExpDate] == NSOrderedAscending) {
        //Active based on Parse, no need to validate...
        NSLog(@"Active based on Parse receipt... No need to validate!");
        return;
    }
}

    //Base 64 encode appBundle receipt
    NSString *receipt64 = [receipt base64EncodedStringWithOptions:0];


    //Create the request
    NSString *sharedSecret = @"[shared-secret]";
    NSError *error;
    //Request with receipt data and shared secret from iTunesConnect
    NSDictionary *requestContents = @{@"receipt-data":receipt64, @"password": sharedSecret};
    NSData *requestData = [NSJSONSerialization dataWithJSONObject:requestContents options:0 error:&error];
    if (!requestData) {
        //Handle error
        NSLog(@"Error: %@", error);

        return;
    }

    //Create a POST request with the receipt data.
    NSURL *storeURL = [NSURL URLWithString:@"https://buy.itunes.apple.com/verifyReceipt"];                      
    //NSURL *sandboxURL = [NSURL URLWithString:@"https://sandbox.itunes.apple.com/verifyReceipt"];                
    NSMutableURLRequest *storeRequest = [NSMutableURLRequest requestWithURL:storeURL];                        
    [storeRequest setHTTPMethod:@"POST"];
    [storeRequest setHTTPBody:requestData];

    //Make a connection to the iTunes Store
    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    [NSURLConnection sendAsynchronousRequest:storeRequest queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        if (connectionError) {
            //Error
        } else {
            //Success
            NSError *error;
            NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
            if (!jsonResponse) {
                //Error
                NSLog(@"Error at !jsonResponse: %@", error);
                return;
            }

            NSString *base64 = jsonResponse[@"latest_receipt"];
            NSArray *info = jsonResponse[@"latest_receipt_info"];
            BOOL isPro;

            //Switch statement for subscription status
            switch ([jsonResponse[@"status"] intValue]) {
                case 21002: {
                    //The data in the receipt-data property was malformed or missing.
                    NSLog(@"21002 : The data in the receipt-data property was malformed or missing.");
                    isPro = NO;
                    break;
                }
                case 21003: {
                    //The receipt could not be authenticated.
                    NSLog(@"21003 : The receipt could not be authenticated.");
                    isPro = NO;
                    break;
                }
                case 21004: {
                    //The shared secret you provided does not match the shared secret on file for your account.
                    NSLog(@"21004 : The shared secret you provided does not match the shared secret on file for your account.");
                    isPro = NO;
                    break;
                }
                case 21005: {
                    //The receipt server is not currently available.
                    NSLog(@"21005 : The receipt server is not currently available.");
                    isPro = NO;
                    break;
                }
                case 21006: {
                    //This receipt is valid but the subscription has expired. When this status code is returned to your server, the receipt data is also decoded and returned as part of the response.
                    NSLog(@"21006 : This receipt is valid but the subscription has expired. When this status code is returned to your server, the receipt data is also decoded and returned as part of the response.");
                    isPro = NO;
                    break;
                }
                case 21007: {
                    //This receipt is valid but the subscription has expired. When this status code is returned to your server, the receipt data is also decoded and returned as part of the response.
                    NSLog(@"21007 : This receipt is from the test environment, but it was sent to the production environment for verification. Send it to the test environment instead..");
                    isPro = NO;
                    break;
                }
                case 21008: {
                    //This receipt is valid but the subscription has expired. When this status code is returned to your server, the receipt data is also decoded and returned as part of the response.
                    NSLog(@"21008 : This receipt is from the production environment, but it was sent to the test environment for verification. Send it to the production environment instead..");
                    isPro = NO;
                    break;
                }
                case 0: {
                    //Valid and active
                    NSLog(@"0 : Valid and active subscription.");
                    isPro = YES;
                    break;
                }
                default: {
                    isPro = NO;
                    break;
                }
            }

            //Set user info to database (Parse)
            user[@"base64"] = base64;
            user[@"info"] = info;
            user[@"expirationDate"] = expirationDate;
            user[@"isPro"] = [NSNumber numberWithBool:isPro];
            [user saveEventually];
        }
    }];