// Load the receipt from the app bundle.

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

NSData *receipt = [NSData dataWithContentsOfURL:receiptURL];

if (!receipt) { /* No local receipt -- handle the error. */ }

/* ... Send the receipt data to your server ... */

NSData *receipt; // Sent to the server by the device

// Create the JSON object that describes the request

NSError *error;

NSDictionary *requestContents = @{

    @"receipt-data": [receipt base64EncodedStringWithOptions:0]

};

NSData *requestData = [NSJSONSerialization dataWithJSONObject:requestContents

                                                      options:0

                                                        error:&error];

if (!requestData) { /* ... Handle error ... */ }

// Create a POST request with the receipt data.

NSURL *storeURL = [NSURL URLWithString:@"https://buy.itunes.apple.com/verifyReceipt"];

NSMutableURLRequest *storeRequest = [NSMutableURLRequest requestWithURL:storeURL];

[storeRequest setHTTPMethod:@"POST"];

[storeRequest setHTTPBody:requestData];

// Make a connection to the iTunes Store on a background queue.

NSOperationQueue *queue = [[NSOperationQueue alloc] init];

[NSURLConnection sendAsynchronousRequest:storeRequest queue:queue

        completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

    if (connectionError) {

        /* ... Handle error ... */

    } else {

        NSError *error;

        NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];

        if (!jsonResponse) { /* ... Handle error ...*/ }

        /* ... Send a response back to the device ... */

    }

}];