Bag Labs Post - In-App Purchases - Getting the Receipt Section

Validate_Receipt.swift

func validateReceipt()
{ 
    //Get the Path to the receipt
    var receiptUrl = NSBundle.mainBundle().appStoreReceiptURL
 
    //Check if it's actually there
    if NSFileManager.defaultManager().fileExistsAtPath(receiptUrl!.path!)
    {
        //Now lets do some validating
        self.validateReceiptAtURL(receiptUrl!)
    }
    else
    {
        //Try and refresh the receipt since we couldn't find one
        //Make sure to conform to SKRequestDelegate
        var refreshRequest = SKReceiptRefreshRequest()
        refreshRequest.delegate = self
        refreshRequest.start()
        println("Did not find a receipt, refreshing receipt")
    }
}
func validateReceiptAtURL(receiptUrl:NSURL)
{
    var response: NSURLResponse?
    var err: NSError?
    var receipt: NSData = NSData(contentsOfURL:receiptUrl, options: nil, error: nil)!
    var receiptdata: String = receipt.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
    var requestData:[String: AnyObject] = ["receipt-data" : receiptdata]
    var jsonRequest = NSJSONSerialization.dataWithJSONObject(requestData, options: nil, error: &err)
     
    //NOTE: Make sure you change out the URL for production!!!
    //Production URL: https://buy.itunes.apple.com/verifyReceipt
    var request = NSMutableURLRequest(URL: NSURL(string: "https://sandbox.itunes.apple.com/verifyReceipt")!)
    var session = NSURLSession.sharedSession()
    request.HTTPMethod = "POST"
    request.HTTPBody = jsonRequest!
 
    var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
    var err: NSError?
    var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error: &err) as? NSDictionary
    if(err != nil)
    {
        println(err!.localizedDescription)
        let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding)
        println("Error could not parse JSON: '\(jsonStr)'")
    }
    else
    {
        if let parseJSON = json
        {
            //Start parsing the JSON
        }
        else
        {
            let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding)
            println("Receipt Error: \(jsonStr)")
        }
    }
    })
    task.resume()
}
 
//SKRequestDelegate Methods
func requestDidFinish(request: SKRequest!)
{
    //Get the Path to the receipt
    var receiptUrl = NSBundle.mainBundle().appStoreReceiptURL
 
    //Check if it's actually there
    if NSFileManager.defaultManager().fileExistsAtPath(receiptUrl!.path!)
    {
        println("Just refreshed and now we have a receipt")
    }
    else
    {
        println("Still did not find a receipt")
    }
}
 
func request(request: SKRequest!, didFailWithError error: NSError!) 
{  
 println(error)
}