Error copying matching creds -- Swift (REST API call) - ios

Question

I'm trying to make an REST API call to a universal devices hub to turn a switch on. It seems like the call is going through, however I am getting an error that says I need credentials, which makes sense because there are credentials needed to get into the interface. However I am not sure how to make this work.
My code is the following
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBOutlet weak var lightOn: UIButton!
#IBAction func lightOn(_ sender: Any) {
guard let url = URL(string: "http://0.0.0.0/rest/nodes/ZW002_1/cmd/DFON") else { return }
let userCredential = URLCredential(user: "admin",
password: "admin",
persistence: .permanent)
URLCredentialStorage.shared.setDefaultCredential(userCredential, for: protectionSpace)
// create URL session ~ defaulted to GET
let session = URLSession.shared
session.dataTask(with: url) { (data, response, error) in
// optional chaining to make sure value is inside returnables and not not
if let response = response {
print(response)
}
if let data = data {
// assuming the data coming back is Json -> transform bytes into readable json data
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
print(json)
} catch {
print("error")
}
}
}.resume() // if this is not called this block of code isnt executed
}
}
I tried piecing together a couple examples online, and the ones I have seen use protectionSpace but when I use it the code returns:
Use of unresolved identifier 'protectionSpace'
Also overall whenever I actually run the simulator I get this exact error:
2017-12-26 13:28:58.656122-0600 hohmtest[6922:1000481] CredStore - performQuery - Error copying matching creds. Error=-25300, query={
atyp = http;
class = inet;
"m_Limit" = "m_LimitAll";
ptcl = http;
"r_Attributes" = 1;
sdmn = "/";
srvr = "192.168.1.73";
sync = syna;
}
<NSHTTPURLResponse: 0x60400042a3e0>
{ URL:
http://192.168.1.73/rest/nodes/ZW002_1/cmd/DON/ } { Status Code: 401,
Headers {
"Cache-Control" = (
"max-age=3600, must-revalidate"
);
Connection = (
"Keep-Alive"
);
"Content-Length" = (
0
);
"Content-Type" = (
"text/html; charset=UTF-8"
);
EXT = (
"UCoS, UPnP/1.0, UDI/1.0"
);
"Last-Modified" = (
"Tue, 26 Dec 2017 11:26:15 GMT"
);
"Www-Authenticate" = (
"Basic realm=\"/\""
);
} }
error

Answer 1

This solution worked for me. This is how I called a REST API that required a username and password. For those wondering, I put this code inside my IBAction button and didn't have to do anything else other than making the button.
let username = "admin"
let password = "admin"
let loginData = String(format: "%#:%#", username, password).data(using: String.Encoding.utf8)!
let base64LoginData = loginData.base64EncodedString()
// create the request
let url = URL(string: "http:/rest/nodes/ZW002_1/cmd/DFON")!
var request = URLRequest(url: url)
request.httpMethod = "GET"
request.setValue("Basic \(base64LoginData)", forHTTPHeaderField: "Authorization")
//making the request
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else {
print("\(error)")
return
}
if let httpStatus = response as? HTTPURLResponse {
// check status code returned by the http server
print("status code = \(httpStatus.statusCode)")
// process result
}
}
task.resume()
********* EXTRA NOTE *************
If yours does not have a username and password and you are trying to call a REST API call in swift here is some code that can help you! BOTH ARE GET REQUESTS!
#IBAction func onGetTapped(_ sender: Any) {
guard let url = URL(string: "https://jsonplaceholder.typicode.com/users") else { return }
// create URL session ~ defaulted to GET
let session = URLSession.shared
session.dataTask(with: url) { (data, response, error) in
// optional chaining to make sure value is inside returnables and not not
if let response = response {
print(response)
}
if let data = data {
// assuming the data coming back is Json -> transform bytes into readable json data
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
print(json)
} catch {
print("error")
}
}
}.resume() // if this is not called this block of code isnt executed
}