Not response from server in JSON request - php

Question

I am working on a login system for an iOS app.
I am now testing the response from remote server.
This is the function for the LOGIN button in the app:
#IBAction func btnEntrar(_ sender: Any) {
let correo = txtEmail.text!
let pass = txtPassword.text!
if(correo == "" || pass == ""){
print("campos vacios")
return
}
let postString = "email=\(correo)&password=\(pass)"
print("envar solicitud \(postString)")
let url = URL(string: "http://.../login.php")!
var request = URLRequest(url: url)
request.httpMethod = "POST"//tipo de envio -> metodo post
request.httpBody = postString.data(using: .utf8)// concatenar mis variables con codificacion utf8
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data else {//si existe un error se termina la funcion
self.errorLabel.text = "error del servidor";
print("solicitud fallida \(String(describing: error))")//manejamos el error
return //rompemos el bloque de codigo
}
do {//creamos nuestro objeto json
print("recibimos respuesta")
if let json = try JSONSerialization.jsonObject(with: data) as? [String: String] {
DispatchQueue.main.async {//proceso principal
let mensaje = json["mensaje"]//constante
let mensaje_error = json["error_msg"]//constante
let error_int = Int(json["error_msg"]!)//constante
print("respuesta: \(mensaje_error ?? "sin mensaje")")
}
}
} catch let parseError {//manejamos el error
print("error al parsear: \(parseError)")
self.errorLabel.text = "error del servidor (json)";
let responseString = String(data: data, encoding: .utf8)
print("respuesta : \(String(describing: responseString))")
}
}
task.resume()
}
And this the PHP file that is receiving the request.
<?php
require_once 'include/DB_Functions.php';
$db = new DB_Functions();
// json response array
$response = array("error" => FALSE);
if (isset($_POST['email']) && isset($_POST['password'])) {
// receiving the post params
$email = $_POST['email'];
$password = $_POST['password'];
// get the user by email and password
$user = $db->getUserByEmailAndPassword($email, $password);
if ($user != false) {
// use is found
$response["error"] = FALSE;
$response["uid"] = $user["unique_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["email"] = $user["email"];
$response["user"]["created_at"] = $user["created_at"];
$response["user"]["updated_at"] = $user["updated_at"];
$response["user"]["imagen"] = $user["imagen"];
$response["user"]["nombre"] = $user["nombre"];
$response["user"]["apellidos"] = $user["apellidos"];
$response["user"]["nivel_usuario"] = $user["nivel_usuario"];
$response["user"]["unidad"] = $user["unidad"];
$response["user"]["id_usuario"] = $user["id_usuario"];
echo json_encode($response);
} else {
// user is not found with the credentials
$response["error"] = TRUE;
$response["error_msg"] = "Wrong credentials! Please, try again!";
echo json_encode($response);
}
} else {
// required post params is missing
$response["error"] = TRUE;
$response["error_msg"] = "Required parameters email or password is missing!";
echo json_encode($response);
}
?>
I am not getting any error or exception, but the last output I receive is
print("recibimos respuesta")
Am I doing something wrong?
EDIT
Demo JSON output
{"error":true,"error_msg":"Required parameters email or password is missing!"}

Answer 1

Your response Object contains not only String. It contains Bool also. You could use like below,
if let json = try JSONSerialization.jsonObject(with: data) as? [String:Any] { //Any for, Any data type
//Do with json
print(json)
}

Answer 2

I think you need to add content type header to the request like this (Objective-C):
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];