I have two client ,one is iOS(Client A) ,another is Jave (Client B) , Client A use for sender and the Client B is receive the data from Client A and print it in console , now I send some String(String and JsonString) to client B , Client B can receieve the message form Client A ,but the console print incomplete
This is my step
1、I define a NSDictionary in iOS
let dict:NSDictionary = ["type":type,"x":point.x,"y":point.y]
2、convent it to json string and append some string in json String
var error:NSError?
let data = NSJSONSerialization.dataWithJSONObject(dict,options:NSJSONWritingOptions.PrettyPrinted, error: &error)
var str = NSString(data: data!, encoding: NSUTF8StringEncoding)
var newStr = return "\(toPort)#\(str!)"
then I print it in iOS console ,It works fine
3、 I convert the string to NSData
let data = newStr.dataUsingEncoding(NSUTF8StringEncoding)
4、send the NSData to server
self.socket!.writeData(data!, withTimeout: self.timeout, tag: 0)
5、only have { displayed in client B ,what happen?
then I try to use jave to achieve the client A , and it works fine in client B
I solved it
1、remove all \n in str
2、use
var newStr = return "\(toPort)#\(str!)\n"
instand of
var newStr = return "\(toPort)#\(str!)"
Related
I am implementing apple in-app provisioning and I follow all steps in the apple guide but in the end, I get a message 'Could not add card' but don't have any error throw this process.
This is how I create PKAddPaymentPassViewController
let cardInfoPass = PKAddPaymentPassRequestConfiguration.init(encryptionScheme: PKEncryptionScheme.ECC_V2);
cardInfoPass?.cardholderName = cardholderName as? String; //The name of the person as shown on the card.
cardInfoPass?.primaryAccountSuffix = primaryAccountSuffix as? String; //The last four or five digits of the card’s number.
cardInfoPass?.localizedDescription = localizedDescription as? String; //A short description of the card.
cardInfoPass?.paymentNetwork = PKPaymentNetwork.masterCard;
cardInfoPass?.primaryAccountIdentifier = primaryAccountIdentifier as? String; // A primary account identifier, used to filter out pass libraries.
cardholderName is the name written on the card
primaryAccountSuffix last 4 digit written on the card
localizedDescription bank name
paymentNetwork we are using master card
primaryAccountIdentifier it is number from iTunes something light this 1MNJDDA667.com.bank.package.name
I think this part is correct I can open the apple wallet modal and all this data are there but when I continue in a modal on the end I need to get certificate and send this certificate to our BE and be should send me back 3 values and they send it to me
...
let certificateLeaf = certificates[0].base64EncodedString();
let certificateSubCA = certificates[1].base64EncodedString();
let nonceString = nonce.base64EncodedString();
let nonceSignature = nonceSignature.base64EncodedString();
...
let reqDataDic: [String: Any] = [
"cardId": cardId,
"applePublicCertificate": certificateSubCA,
"nonce": nonceString,
"nonceSignature": nonceSignature,
"customerId": customerId,
"deviceId": deviceId,
]
....
var request = URLRequest(url: url)
request.httpMethod = "POST"
....
request.httpBody = try? JSONSerialization.data(withJSONObject: reqDataDic, options: .prettyPrinted)
UPDATE2: we are now sending nonce and nonceSignature as HEX like this
extension Data {
struct HexEncodingOptions: OptionSet {
let rawValue: Int
static let upperCase = HexEncodingOptions(rawValue: 1 << 0)
}
func hexEncodedString(options: HexEncodingOptions = []) -> String {
let format = options.contains(.upperCase) ? "%02hhX" : "%02hhx"
return self.map { String(format: format, $0) }.joined()
}
}
...
let nonceData = Data(bytes: nonce)
let nonceHex = nonceData.hexEncodedString();
let nonceSignatureData = Data(bytes: nonceSignature)
let nonceSignatureHex = nonceSignatureData.hexEncodedString();
BE send me back all values that I need: activationData, ephemeralPublicKey, encryptedPassData it returns it as a JSON object so I need to convert it to Data and all these values put into handler
this is how I am putting data to handler:
if let dictionaryJson = try JSONSerialization.jsonObject(with: data!, options: []) as? [String: Any] {
let activationDataString = dictionaryJson["activationData"] as! String;
let ephemeralPublicKeyString = dictionaryJson["ephemeralPublicKey"] as! String;
let encryptedPassDataString = dictionaryJson["encryptedPassData"] as! String;
let activationData = activationDataString.data(using: .utf8)
let ephemeralPublicKey = Data(base64Encoded: ephemeralPublicKeyString)
let encryptedPassData = Data(base64Encoded: encryptedPassDataString)
let paymentPassRequest = PKAddPaymentPassRequest.init()
paymentPassRequest.activationData = activationData;
paymentPassRequest.encryptedPassData = encryptedPassData;
paymentPassRequest.ephemeralPublicKey = ephemeralPublicKey;
handler(paymentPassRequest)
}
I fill all data into paymentPassRequest and all looks ok xCode is not complaining.
And at this moment apple wallet shows an alert dialog with Could not add a card with 2 buttons try it later or try it again ....
I have a card whitelisted on the MasterCard side
I tried it on simulators, real devices, and also on app in TestFlight
UPDATE:
We found an error from the Apple
Response:
https://nc-pod4-smp-device.apple.com:443/broker/v4/devices/042D1xxxxxxxxxxxxx2C52/cards 500
{
Connection = close;
"Content-Length" = 81;
"Content-Type" = "application/json";
Date = "Thu, 08 Jul 2021 08:35:25 GMT";
Vary = "accept-language";
"X-Pod" = "nc-pod4";
"X-Pod-Region" = "paymentpass.com.apple";
"x-conversation-id" = b2axxxxxxxxxxx9e6a4d;
}
{
statusCode = 500;
statusMessage = "Broker Service Response exception";
}
you are encoding nonce, nonce signature with Hex format for sending it to your server, and after getting the response back, you are trying to convert them with base64 and utf8. Try with Hex, it should work.
We are using the below conversions
- (NSData *)dataFromHexString:(NSString *)string
{
string = [string lowercaseString];
NSMutableData *data= [NSMutableData new];
unsigned char whole_byte;
char byte_chars[3] = {'\0','\0','\0'};
int i = 0;
int length = string.length;
while (i < length-1) {
char c = [string characterAtIndex:i++];
if (c < '0' || (c > '9' && c < 'a') || c > 'f')
continue;
byte_chars[0] = c;
byte_chars[1] = [string characterAtIndex:i++];
whole_byte = strtol(byte_chars, NULL, 16);
[data appendBytes:&whole_byte length:1];
}
return data;
}
-(NSMutableString *) convertToString:(NSData *)data{
NSUInteger capacity = data.length * 2;
NSMutableString *sbuf = [NSMutableString stringWithCapacity:capacity];
const unsigned char *buf = data.bytes;
NSInteger i;
for (i=0; i<data.length; ++i) {
[sbuf appendFormat:#"%02x", (NSUInteger)buf[i]];
}
return sbuf;
}
let activationData = activationDataString.data(using: .utf8)
I think this encoded is only for VISA.
For MasterCard it has to be base64:
let activationData = Data(base64Encoded: activationDataString)
I ran into this exact issue implementing our Card Provisioning. In our case we had to do both of the following:
Make sure our PKAddPaymentPassRequest fields were all set properly. All three of the fields we were provided by our API (activationData, encryptedPassData, ephemeralPublicKey) were base64 encoded so they all had to be converted to Data's as such: paymentPassRequest.ephemeralPublicKey = Data(base64Encoded: <YOUR EPHEMERAL PUBLIC KEY STRING>, options: [])
We had to create new TestFlight builds in order to fully test this workflow. I ran into that exact same 500 response from Apple anytime I tried profiling or running the app from Xcode directly, even if it was on a physical device. It wasn't until I ran the TestFlight build that it finally worked properly.
I have a string received from the server and I was trying to decode the string with padding but it is throwing nil as result. I tried codes that are available in stack overflow but of no use. Help will be highly appreciated.
I tried with base64 encoded with ignore unknown characters option and padding, still it throws nil.
let pem = "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"
let decodedData = NSData(base64Encoded: dataStr, options: .ignoreUnknownCharacters)
let length = dataStr.count
dataStr = dataStr.padding(toLength: length + (4 - length % 4) % 4, withPad: "=", startingAt: 0)`
It has to give some decoded data with which I can create a certificate because the response is in the format of .cert.
A certificate is not a string. You cannot create a string from the raw Data.
You can decode the base64 encoded string simply with
let decodedData = Data(base64Encoded: dataStr)
Notes:
Don't use NSData in Swift.
The ignoreUnknownCharacters is not needed.
The padding is wrong. It's only required when encoding the data and the base64 related API of String and Data adds the = characters automatically.
May be It will Help
For Image I am doing like this
I am converting UIImage To data and Converting That data to base64EncodedString
let imageData = UIimage.pngData()
//encode string
let imgBase64Str = imageData?.base64EncodedString(options: .lineLength64Characters) ?? ""
//decoding string to data
let decodedData = Data(base64Encoded: imgBase64Str, options: .ignoreUnknownCharacters)
I send the text from a TextView to my Backend. To include linebreaks, i try to serialize the textView.text to JSON.
let jsonObject: NSMutableDictionary = NSMutableDictionary()
jsonObject.setValue(textView.text, forKey: "text")
let jsonData: NSData
do {
jsonData = try JSONSerialization.data(withJSONObject: jsonObject, options: JSONSerialization.WritingOptions()) as NSData
let jsonString = NSString(data: jsonData as Data, encoding: String.Encoding.utf8.rawValue) as! String
print(jsonString)
} catch _ {
print ("JSON Failure")
}
}
But since this is a Dictionary, the resulting text looks like this:
{"text":"test\nstack\n\noverflow"}
i actually just need: test\nstack\n\noverflow
Is there a pretty way to transform a multiline String in swift to have these "\n" for linebreaks without any extra characters?
Edit:
I expect to type into my textView something like this:
and as a result get the string "hello\n\n"
The source looks like this:
let text = textView.text
let components = text?.components(separatedBy: CharacterSet.newlines).filter({!$0.isEmpty})
let textWithLineFeeds = components?.joined(separator:"\n")
print(textWithLineFeeds!)
print(textView.text)
the first print gives:
test
hello
linebreak above
the second print statement:
test
hello
linebreak above
i wish i could see:
test\nhello\n\nlinebreak above
To convert text with arbitrary new line characters (CR, LF, CRLF etc.) to distinct - only LF - line breaks use:
let text = "test\r\nstack\n\noverflow\rfoo"
let components = text.components(separatedBy: CharacterSet.newlines).filter({!$0.isEmpty})
let textWithLineFeeds = components.joined(separator:"\n")
If the server accepts only CR, change \n to \r.
I need help understanding how to convert NSData into a Int. I first downloaded the textFile from a server by doing this:
let url = NSURL(string: "path to server")!
let data = NSData(contentsOfURL: url)!
print(data) //confirmed there is data
//output in console is <31343231 340a>
When I downloaded the file on my computer, the file looks like this:
I looked around for ways to convert NSData to Int, and came across a technique like this:
var src: Int = 0
data.getBytes(&src, length: sizeof(Int))
print("price: \(src)") //output was 11219279950897
Unfortunately 2929 != 11219279950897. I presume it's something to do with possible white space in the document. Would be grateful if I can get some advice on this!
What about this? (Swift 1.2)
let data = ...
if let
datastring = NSString(data: data, encoding: NSUTF8StringEncoding),
num = (datastring as String).toInt() {
print(num)
}
Hope this helps.
I keep getting this error :
fatal error: unexpectedly found nil while unwrapping an Optional value
and cannot figure out how to debug it!
Here's my code :
func readCSV() -> Array<String> {
// Creates a new array of strings
var csvArray : Array<String> = Array<String>()
if let url: NSURL = NSURL(string : "URLFROMCSV" ) {
// Creates an Input Stream that will load the datas from our URL
let data :NSData! = NSData(contentsOfURL: url)!
let stream : NSInputStream! = NSInputStream(data: data)
// Opens the receiving stream
stream.open()
// Sets a buffer with a given size size
let bufferSize = 1024
var buffer = Array <UInt8>(count: bufferSize, repeatedValue: 0)
// String variable initialization
var csvFullString : String = ""
// While the stream receives datas, parses datas, convert them into strings and then concatenate them into one big string
while (stream.hasBytesAvailable) {
let readSize = stream.read(&buffer, maxLength: bufferSize)
let csvRaw = NSString (bytes: &buffer, length: readSize, encoding: NSUTF8StringEncoding)
let csvString = csvRaw as String!
csvFullString = csvFullString + csvString
}
// Fills the array with each strings. Separation between strings is made when a Θ character is parsed
csvArray = csvFullString.componentsSeparatedByString("Θ")
// Delete each null string
for(var i = 0 ; i < csvArray.count; i++) {
if(csvArray[i] == "") {
csvArray.removeAtIndex(i)
}
}
}
return csvArray
}
After searching on the web, I'm pretty sure it has something to do with unwrapping elements but the fact is when I debug it, i don't get any nil value anywhere.
PS: Would like to upload a screen but can't because i don't have 10 reputation, so bad!
Thanks in advance!
EDIT : Line let data :NSData! = NSData(contentsOfURL: url)! got the error.
Terry
You're probably creating the error in one of these two lines (though it may show up later):
let data :NSData! = NSData(contentsOfURL: url)!
let stream : NSInputStream! = NSInputStream(data: data)
You're assigning an optional value to an implicitlyUnwrappedOptional type and then using it without checking if you have a valid value.
This is why if let exists. It's a little funny that you've started to indent as if you're using if let but aren't.
Try this instead:
if let url = NSURL(string : "http://gorillaapplications.com/etablissements.csv" ) {
// Creates an Input Stream that will load the datas from our URL
if let data = NSData(contentsOfURL: url) {
let stream = NSInputStream(data: data)
stream.open()
// rest of your code here
}
else {
println("Didn't get a data object")
}
}
else {
println("Didn't get a URL object")
}
You really need to grasp Optionals for Swift. I'd recommend reading my Optionals chapter in this iBook: https://itunes.apple.com/us/book/swift-optionals-generics-for/id943445214?mt=11&uo=4&at=11lMGu
Update:
Since you added a bit more in your comments above, you're saying you get the error on this line: let data: NSData! = NSData(contentsOfURL: url)!. This is because of the ! at the end, which tells Swift you're sure that this function will return a valid value, so just use it, without checking if it's nil first. In your case, the function is returning nil and so your app crashes. Using the sample code I've provided above, you'll see that you'll no longer get a crash, but your code will execute the "Didn't get a data object" line. You'll need to correctly handle the case where you can't load data from that URL.