Login Connection, method Get swift with API - swift

Question

I want to connect in an app in swift 2.1
I have a button logIn and I make a function loginButton.
I want to recover my url: localhost/connexion/login/password
And with that I want to say if the user is in the database it's ok !
But I don't really anderstant swift, I'm a beginner in this language.
So there is my code:
#IBAction func loginButton(sender: AnyObject) {
NSLog("login ok")
let _login = loginText.text
let _password = passwordText.text
if(_login!.isEmpty || _password!.isEmpty){
var alert:UIAlertView = UIAlertView()
alert.title = "Error"
alert.message = "Entrez vos identifiants"
alert.delegate = self
alert.addButtonWithTitle("OK")
alert.show()
} else{
let request = NSMutableURLRequest(URL: NSURL(string: "http://localhost:8888/connexion/"+_login!+"/"+_password!)!)
request.HTTPMethod = "GET"
let postString = "login=\(_login!)&pass=\(_password)"
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request)
task.resume();
}
}
I have follow this before How to make an HTTP request in Swift?
but it doesn't work.
I tried a lot of things, but without really understand what happened and I don't find a great tutorial with very good explanation. If someone can explain me how to do it I will be very happy !

Answer 1

I think for sending data to server you should create a "POST" request and use NSURLSession API to send data
#IBAction func loginButton(sender: AnyObject) {
NSLog("login ok")
let _login = loginText.text
let _password = passwordText.text
if(_login.isEmpty || _password.isEmpty){
var alert:UIAlertView = UIAlertView()
alert.title = "Error"
alert.message = "Entrez vos identifiants"
alert.delegate = self
alert.addButtonWithTitle("OK")
alert.show()
} else{
let request = NSMutableURLRequest(URL: NSURL(string: "http://localhost:8888/connexion/login")!)
request.HTTPMethod = "POST"
let params = ["login": _login, "pass": _password]
do {
let data = try NSJSONSerialization.dataWithJSONObject(params, options: .PrettyPrinted)
request.HTTPBody = data
} catch let error as NSError {
print("json error: \(error.localizedDescription)")
}
let loginTask = NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: { (data, response, error) in
guard let data = data, let _ = response where error == nil else {
print("error")
return
}
do {
let json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments)
print(json)
} catch let error as NSError {
print("json error: \(error.localizedDescription)")
}
})
loginTask.resume()
}
}
for using "GET" replace else part with
let url = "http://localhost:8888/connexion/login=\(_login)&pass=\(_password)"
let urlString = url.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
let request = NSURLRequest(URL: NSURL(string: urlString)!)
let loginTask = NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: { (data, response, error) in
guard let data = data, let _ = response where error == nil else {
print("error")
return
}
/*do {
let json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments)
print(json)
} catch let error as NSError {
print("json error: \(error.localizedDescription)")
}*/
if let httpStatus = response as? NSHTTPURLResponse where httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(response)")
}
let responseString = String(data: data!, encoding:NSUTF8StringEncoding)
print("responseString = \(responseString)")
})
loginTask.resume()