Getting statusCode other than 200...299 in HTTPURLResponse of URLSession - ios

Question

the following is my APIManager code, I'm using it in all my apps. But sometimes, the guard statement fails in connectToServer function, which means the statusCode of HTTPURLResponse other than 200...299 and the thing here is even after getting statusCode other than 200...299 my record got inserted into DB. I don't know what happens.
I thought that the cause of this behavior is from ServerURL, because I'm using a dev server with IP address http://00.000.0.000/ without security. Once I moved it to domain as https://XXX.XXXXXXXXXX.XXXXX/ it is working fine. Can you help me to figure out this?
And also will it supports for asynchronous calls?
import UIKit
struct APIResponse : Decodable {
let status : Bool
let message : String
let extra: String?
}
internal let BASE_URL = "http://00.000.0.00/app/v0_1/api/" // Example server URL
enum APIPath: String {
case registration = "registration"
case login = "login"
case getProfile = "get_profile"
func directURL() -> URL? {
let urlPath = BASE_URL + self.rawValue
return URL(string: urlPath)
}
func extendedURL(using parameters: [String: Any]) -> URL? {
let extendedPath = parameters.map { $0.key + "=" + "\($0.value)" }.joined(separator: "&")
let urlPath = BASE_URL + self.rawValue + "?" + extendedPath
return URL(string: urlPath)
}
}
enum APIMethod: String {
case get = "GET"
case put = "PUT"
case post = "POST"
case patch = "PATCH"
case delete = "DELETE"
}
enum APIHeaders {
case user
case app
var authorization: [String:String] {
let acceptLanguage = UserDefaults.standard.value(forKey: UDKeys.appleLanguage) as? String ?? ""
if self == .user {
let token = UserDefaults.standard.value(forKey: UDKeys.userToken) as? String ?? ""
return ["Content-Type": "application/json", "Accept": "application/json", "Accept-Language": acceptLanguage, "Token" : token]
}
return ["Content-Type": "application/json", "Accept": "application/json", "Accept-Language": acceptLanguage]
}
}
struct APIRequest {
var url: URL?
var method: String
var parameters: Data?
var headers: [String:String]
init(path: APIPath, method: APIMethod, headers: APIHeaders) {
self.url = path.directURL()
self.method = method.rawValue
self.headers = headers.authorization
}
init(path: APIPath, parameters: [String: Any], method: APIMethod, headers: APIHeaders) {
self.url = path.extendedURL(using: parameters)
self.method = method.rawValue
self.headers = headers.authorization
}
init(path: APIPath, method: APIMethod, body: [String:Any], headers: APIHeaders) {
self.url = path.directURL()
self.method = method.rawValue
self.parameters = try? JSONSerialization.data(withJSONObject: body, options: .sortedKeys)
self.headers = headers.authorization
}
init<Encode: Encodable>(path: APIPath, method: APIMethod, body: Encode, headers: APIHeaders) {
self.url = path.directURL()
self.method = method.rawValue
self.parameters = try? JSONEncoder().encode(body)
self.headers = headers.authorization
}
}
struct APIError: Error {
let reason: String
let code: String?
init(reason: String, code: String? = nil) {
self.reason = reason
self.code = code
}
}
struct APIDispatcher {
static let instance = APIDispatcher()
private init() {}
func dispatch<Decode: Decodable>(request: APIRequest, response: Decode.Type, result: #escaping (Result<Decode, APIError>) -> ()) {
DispatchQueue(label: "queue", attributes: .concurrent).async {
self.connectToServer(with: request) { (resultant) in
switch resultant {
case .success(let data):
do {
let decoded = try JSONDecoder().decode(response, from: data)
DispatchQueue.main.async {
result(.success(decoded))
}
} catch let decodedError {
print("[Decoded Error]: ", decodedError)
do {
let apiResponse = try JSONDecoder().decode(APIResponse.self, from: data)
let apiError = APIError(reason: apiResponse.message, code: apiResponse.extra)
DispatchQueue.main.async {
result(.failure(apiError))
}
} catch {
let apiError = APIError(reason: decodedError.localizedDescription)
DispatchQueue.main.async {
result(.failure(apiError))
}
}
}
case .failure(let error):
DispatchQueue.main.async {
result(.failure(error))
}
}
}
}
}
func dispatch(request: APIRequest, result: #escaping (Result<Dictionary<String,Any>, APIError>) -> ()) {
DispatchQueue(label: "queue", attributes: .concurrent).async {
self.connectToServer(with: request) { (resultant) in
switch resultant {
case .success(let data):
do {
let serialized = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as! Dictionary<String,Any>
DispatchQueue.main.async {
result(.success(serialized))
}
} catch {
let error = APIError(reason: error.localizedDescription)
DispatchQueue.main.async {
result(.failure(error))
}
}
case .failure(let error):
DispatchQueue.main.async {
result(.failure(error))
}
}
}
}
}
private func connectToServer(with request: APIRequest, result: #escaping (Result<Data, APIError>) -> ()) {
guard let url = request.url else {
let error = APIError(reason: "Invalid URL")
result(.failure(error))
return
}
var urlRequest = URLRequest(url: url, cachePolicy: .reloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 30)
urlRequest.httpMethod = request.method
urlRequest.httpBody = request.parameters
urlRequest.allHTTPHeaderFields = request.headers
print(urlRequest)
let urlSessionConfiguration = URLSessionConfiguration.default
urlSessionConfiguration.waitsForConnectivity = false
urlSessionConfiguration.timeoutIntervalForRequest = 30
urlSessionConfiguration.timeoutIntervalForResource = 60
let urlSession = URLSession(configuration: urlSessionConfiguration)
urlSession.dataTask(with: urlRequest) { (data, response, error) in
if let error = error {
let error = APIError(reason: error.localizedDescription)
result(.failure(error))
return
}
guard let httpResponse = response as? HTTPURLResponse,
(200...299).contains(httpResponse.statusCode) else {
let error = APIError(reason: "Server Error")
result(.failure(error))
return
}
if let data = data {
result(.success(data))
}
}.resume()
}
}
Note: BASE_URL and APIResponse might be vary according to project.
I'm using it as
func login() {
self.startLoading()
let body = ["mobile_number": phoneNumberTF.text!, "password" : passwordTF.text!, "uuid" : UIDevice.current.identifierForVendor!.uuidString]
let apiRequest = APIRequest(path: .login, method: .post, body: body, headers: .app)
APIDispatcher.instance.dispatch(request: apiRequest) { result in
self.stopLoading()
switch result {
case .success(let response):
break
case .failure(let error):
break
}
}
}
EDIT: My bad I asked completely reverse on statsCode now I modified it.