POST Json to API with Alamofire? - ios

I want to post a JSON object I create in my service class and pass to the networkService.
This is my network service, but i get an error of
Value of type '[String : Any]' has no member 'data'
on the line: let jsonData = json.data(using: .utf8, allowLossyConversion: false)!
func request(json: [String:Any]) {
let url = URL(string: urlString)!
let jsonData = json.data(using: .utf8, allowLossyConversion: false)!
var request = URLRequest(url: url)
request.httpMethod = HTTPMethod.post.rawValue
request.setValue("application/json; charset=UTF-8", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData
Alamofire.request(request).responseJSON {
(response) in
print(response)
}
}
The idea being I pass in my JSON when i call the func via the func parameter.
This is the JSON object passed in:
func loginUser(data: Array<String>, deviceToken: String) {
// create JSON
let json = [ "login-email" : data[0],
"login-password" : data[1],
"login-secret" : "8A145C555C43FBA5",
"devicetoken" : deviceToken
]
networkManager.request(json: json)
}
Then I convert and send it to the API (urlString)
Any idea if/why this isnt working?
THanks
Updated revision:
func request(json: [String:Any]) {
let url = URL(string: urlString)!
do {
let jsonData = try JSONSerialization.data(withJSONObject: json, options:[])
var request = URLRequest(url: url)
request.httpMethod = HTTPMethod.post.rawValue
request.setValue("application/json; charset=UTF-8", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData
Alamofire.request(request).responseJSON {
(response) in
print(response)
}
} catch {
print("Failed to serialise and send JSON")
}
}
update: added my code to make a call with completion question:
func sendLoginRequest() {
let userLogin = UserService.init(loginEmail: userEmail, loginPassword: userPassword, loginSecret: loginSecret, deviceToken: deviceToken)
networkService.logUserIn(request: userLogin) { (<#JSON?#>, <#NSError?#>) in
<#code#>
}
}
edit: Updated Payload Shot:
edit 2: mapping issue example:
init?(_ json: JSON) {
// Map API Key from top level
guard let apiKey = json["apikey"].string else { return nil }
// Map User at user level
guard let userDataArray = json["user"].array else {
fatalError("user data array NOT FOUND")
}
print("USER DATA IS \(userDataArray)")
// assign user
for child in userDataArray {
guard let userID = child["id"].int,
let userEmail = child["email"].string,
let lastName = child["lastname"].string,
let firstName = child["firstname"].string,
let company = child["company"].string,
let userImage = child["image"].string,
let jobTitle = child["jobtitle"].string
else { return nil
}
}
// Assign to model properties
self.apiKey = apiKey
self.userEmail = userEmail
self.lastName = lastName
self.firstName = firstName
self.company = company
self.userImage = userImage
self.jobTitle = jobTitle
self.userID = userID
}

I just show how I work with this.
You don't have to convert your parameters to JSON. It's code from Alamofire.
/// A dictionary of parameters to apply to a `URLRequest`.
public typealias Parameters = [String: Any]
Use this method instead of your:
Alamofire.request(url, method: method, parameters: parameters, encoding: encoding, headers: customHeaders)
Try this:
Instead of your request.httpBody = jsonData you can pass your json in parameters.
Your whole code will be:
func request(json: [String:Any]) {
Alamofire.request(urlString, method: .post, parameters: json, encoding: JSONEncoding.default).responseJSON {
(response) in
print(response)
}
}
If you are interested in my approach:
func makePick(request: MakePickRequest, completionHandler: #escaping APICompletionHandler) {
let parameters = request.converToParameters()
Alamofire.request(Endpoints.makePick, method: .post, parameters: parameters, encoding: JSONEncoding.default).responseJSON { response in
self.handleResponse(response: response, completionHandler: completionHandler)
}
}
Request:
struct MakePickRequest: GeneralRequest {
let eventId: Int64
let sportId: String
let pickType: PickType
let betType: BetType
let amount: Int
func converToParameters() -> [String : String] {
return ["event_id": String(eventId), "sport_id": sportId,
"pick_type": pickType.rawValue, "bet_type": betType.rawValue,
"amount": String(amount)]
}
}
Structure with endpoints:
struct Endpoints {
// Development baseURL
static let baseURL = "http://myurl/"
private static let apiVersion = "api/v1/"
static var fullPath: String {
return "\(baseURL)\(apiVersion)"
}
// MARK: - User endpoints (POST)
static var login: String {
return "\(fullPath)users/login"
}
static var signUp: String {
return "\(fullPath)users/signup"
}
...
}
Outside of any class (but import SwiftyJSON is obligatory):
typealias APICompletionHandler = (_ data: JSON?, _ error: NSError?) -> Void
Handle response:
private func handleResponse(response: DataResponse<Any>, completionHandler: APICompletionHandler) {
self.printDebugInfo(response)
switch response.result {
case .success(let value):
self.handleJSON(data: value, handler: completionHandler)
case .failure(let error):
print(error)
completionHandler(nil, error as NSError?)
}
}
private func handleJSON(data: Any, handler: APICompletionHandler) {
let json = JSON(data)
let serverResponse = GeneralServerResponse(json)
if (serverResponse?.status == .ok) {
handler(serverResponse?.data, nil)
} else {
handler(nil, self.parseJsonWithErrors(json))
}
}
GeneralServerResponse (depends on your server API):
import SwiftyJSON
final class GeneralServerResponse {
let data: JSON
let status: Status
init?(_ json: JSON) {
guard let status = json["status"].int else {
return nil
}
self.status = Status(status)
self.data = json["data"]
}
enum Status {
case ok
case error
case unauthorized
init(_ input: Int) {
if input >= 200 && input < 400 {
self = .ok
} else if input == 403 {
self = .unauthorized
} else {
self = .error
}
}
}
}
My actual example of usage.
This is outside:
func +=<K, V> ( left: inout [K : V], right: [K : V]) { for (k, v) in right { left[k] = v } }
Example of request:
func makePick(request: MakePickRequest, completionHandler: #escaping APICompletionHandler) {
var parameters = ["auth_token": Preferences.getAuthToken()]
parameters += request.converToParameters()
manager.apiRequest(url: Endpoints.makePick, method: .post, parameters: parameters, encoding: JSONEncoding.default).responseJSON { response in
self.handleResponse(response: response, completionHandler: completionHandler)
}
}
SessionManager extension to add headers for all requests:
extension SessionManager {
func apiRequest(url: URLConvertible, method: HTTPMethod, parameters: Parameters? = nil, encoding: ParameterEncoding, headers: HTTPHeaders? = nil) -> DataRequest {
var customHeaders: HTTPHeaders = ["api-key" : "1wFVerFztxzhgt"]
if let headers = headers {
customHeaders += headers
}
return request(url, method: method, parameters: parameters, encoding: encoding, headers: customHeaders)
}
}
In APIManager class:
private let manager: SessionManager
init() {
manager = Alamofire.SessionManager.default
}
Call example:
apiClient.makePick(request: request) { data, error in
if let error = error {
print(error.localizedDescription)
return
}
if let data = data {
// data is a JSON object, here you can parse it and create objects
}
}
Example of class:
import SwiftyJSON
final class MyClass {
let id: Int
let username: String
let parameter: Double
init?(_ json: JSON) {
guard let id = json["id"].int, let username = json["username"].string,
let parameter = json["parameter"].double else {
return nil
}
self.id = id
self.username = username
self.parameter = parameter
}
}

Related

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

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.

iOS create generic Alamofire request using swift

Recently I have started learning iOS app development using swift so I am new to it. I want to implement rest api call in swift & found that we can achieve this using URLRequest. So I have written generic method to call all type(like get, put, post) of rest api as below.
import Foundation
//import Alamofire
public typealias JSON = [String: Any]
public typealias HTTPHeaders = [String: String];
public enum RequestMethod: String {
case get = "GET"
case post = "POST"
case put = "PUT"
case delete = "DELETE"
}
public enum Result<Value> {
case success(Value)
case failure(Error)
}
public class apiClient{
private var base_url:String = "https://api.testserver.com/"
private func apiRequest(endPoint: String,
method: RequestMethod,
body: JSON? = nil,
token: String? = nil,
completionHandler: #escaping (Data?, URLResponse?, Error?) -> Void) {
let url = URL(string: (base_url.self + endPoint))!
var urlRequest = URLRequest(url: url)
urlRequest.httpMethod = method.rawValue
urlRequest.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
if let token = token {
urlRequest.setValue("bearer " + token, forHTTPHeaderField: "Authorization")
}
if let body = body {
urlRequest.httpBody = try? JSONSerialization.data(withJSONObject: body)
}
let session = URLSession(configuration: .default)
let task = session.dataTask(with: urlRequest) { data, response, error in
//NSLog(error)
completionHandler(data, response, error)
}
task.resume()
}
public func sendRequest<T: Decodable>(for: T.Type = T.self,
endPoint: String,
method: RequestMethod,
body: JSON? = nil,
token: String? = nil,
completion: #escaping (Result<T>) -> Void) {
return apiRequest(endPoint: endPoint, method: method, body:body, token: token) { data, response, error in
guard let data = data else {
return completion(.failure(error ?? NSError(domain: "SomeDomain", code: -1, userInfo: nil)))
}
do {
let decoder = JSONDecoder()
try completion(.success(decoder.decode(T.self, from: data)))
} catch let decodingError {
completion(.failure(decodingError))
}
}
}
}
this is how I call it method from controller
public func getProfile(userId :Int, objToken:String) -> Void {
let objApi = apiClient()
objApi.sendRequest(for: ProfileDetails.self,
endPoint:"api/user/profile/\(userId)",
method: .get,
token: objToken,
completion:
{(userResult: Result<ProfileDetails>) -> Void in
switch userResult
{
case .success(let value):
if value.respCode == "01" {
print(value.profile)
do {
//... ddo some taks like store response in local db or else
} catch let error as NSError {
// handle error
print(error)
}
}
else {
//do some task
}
break
case .failure(let error):
print(error)
break
}
})
}
I am decoding server response in below model
class ProfileDetails : Response, Decodable {
var appUpdate : AppUpdate?
var profile : Profile?
enum CodingKeys: String, CodingKey {
case profile = "profile"
case respCode = "resp_code"
case respMsg = "resp_msg"
}
public required convenience init(from decoder: Decoder) throws {
self.init()
let values = try decoder.container(keyedBy: CodingKeys.self)
self.profile = try values.decodeIfPresent(Profile.self, forKey: .profile)
self.respCode = try values.decodeIfPresent(String.self, forKey: .respCode)!
self.respMsg = try values.decodeIfPresent(String.self, forKey: .respMsg)
}
}
This code is not able to handle error response like 401, 404 etc from server. So what I am looking for, is to convert this api (URLRequest)request to generic Alamofire request with error handling like 401, 404 etc. I have install Alamofire pods. Is there anyone who has developed generic Alamofire request method with decoding & error handling?
Thanks in advance :)
Git link: https://github.com/sahilmanchanda2/wrapper-class-for-alamofire
Here is my version(Using Alamofire 5.0.2):
import Foundation
import Alamofire
class NetworkCall : NSObject{
enum services :String{
case posts = "posts"
}
var parameters = Parameters()
var headers = HTTPHeaders()
var method: HTTPMethod!
var url :String! = "https://jsonplaceholder.typicode.com/"
var encoding: ParameterEncoding! = JSONEncoding.default
init(data: [String:Any],headers: [String:String] = [:],url :String?,service :services? = nil, method: HTTPMethod = .post, isJSONRequest: Bool = true){
super.init()
data.forEach{parameters.updateValue($0.value, forKey: $0.key)}
headers.forEach({self.headers.add(name: $0.key, value: $0.value)})
if url == nil, service != nil{
self.url += service!.rawValue
}else{
self.url = url
}
if !isJSONRequest{
encoding = URLEncoding.default
}
self.method = method
print("Service: \(service?.rawValue ?? self.url ?? "") \n data: \(parameters)")
}
func executeQuery<T>(completion: #escaping (Result<T, Error>) -> Void) where T: Codable {
AF.request(url,method: method,parameters: parameters,encoding: encoding, headers: headers).responseData(completionHandler: {response in
switch response.result{
case .success(let res):
if let code = response.response?.statusCode{
switch code {
case 200...299:
do {
completion(.success(try JSONDecoder().decode(T.self, from: res)))
} catch let error {
print(String(data: res, encoding: .utf8) ?? "nothing received")
completion(.failure(error))
}
default:
let error = NSError(domain: response.debugDescription, code: code, userInfo: response.response?.allHeaderFields as? [String: Any])
completion(.failure(error))
}
}
case .failure(let error):
completion(.failure(error))
}
})
}
}
The above class uses latest Alamofire version (as of now Feb 2020), This class covers almost every HTTP Method with option to send data in Application/JSON format or normal. With this class you get a lot of flexibility and it automatically converts response to your Swift Object.
Look at the init method of this class it has:
data: [String,Any] = In this you will put your form data.
headers: [String:String] = In this you can send custom headers that you want to send along with the request
url = Here you can specify full url, you can leave it blank if you already have defined baseurl in Class. it comes handy when you want to consume a REST service provided by a third party. Note: if you are filling the url then you should the next parameter service should be nil
service: services = It's an enum defined in the NetworkClass itself. these serves as endPoints. Look in the init method, if the url is nil but the service is not nil then it will append at the end of base url to make a full URL, example will be provided.
method: HTTPMethod = here you can specify which HTTP Method the request should use.
isJSONRequest = set to true by default. if you want to send normal request set it to false.
In the init method you can also specify common data or headers that you want to send with every request e.g. your application version number, iOS Version etc
Now Look at the execute method: it's a generic function which will return swift object of your choice if the response is success. It will print the response in string in case it fails to convert response to your swift object. if the response code doesn't fall under range 200-299 then it will be a failure and give you full debug description for detailed information.
Usage:
say we have following struct:
struct Post: Codable{
let userId: Int
let id: Int
let title: String
let body: String
}
Note the base url defined in NetworkClass https://jsonplaceholder.typicode.com/
Example 1: Sending HTTP Post with content type Application/JSON
let body: [String : Any] = ["title": "foo",
"body": "bar",
"userId": 1]
NetworkCall(data: body, url: nil, service: .posts, method: .post).executeQuery(){
(result: Result<Post,Error>) in
switch result{
case .success(let post):
print(post)
case .failure(let error):
print(error)
}
}
output:
Service: posts
data: ["userId": 1, "body": "bar", "title": "foo"]
Post(userId: 1, id: 101, title: "foo", body: "bar")
HTTP 400 Request
NetworkCall(data: ["email":"peter#klaven"], url: "https://reqres.in/api/login", method: .post, isJSONRequest: false).executeQuery(){
(result: Result) in
switch result{
case .success(let post):
print(post)
case .failure(let error):
print(error)
}
}
output:
Service: https://reqres.in/api/login
data: ["email": "peter#klaven"]
Error Domain=[Request]: POST https://reqres.in/api/login
[Request Body]:
email=peter%40klaven
[Response]:
[Status Code]: 400
[Headers]:
Access-Control-Allow-Origin: *
Content-Length: 28
Content-Type: application/json; charset=utf-8
Date: Fri, 28 Feb 2020 05:41:26 GMT
Etag: W/"1c-NmpazMScs9tOqR7eDEesn+pqC9Q"
Server: cloudflare
Via: 1.1 vegur
cf-cache-status: DYNAMIC
cf-ray: 56c011c8ded2bb9a-LHR
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
x-powered-by: Express
[Response Body]:
{"error":"Missing password"}
[Data]: 28 bytes
[Network Duration]: 2.2678009271621704s
[Serialization Duration]: 9.298324584960938e-05s
[Result]: success(28 bytes) Code=400 "(null)" UserInfo={cf-ray=56c011c8ded2bb9a-LHR, Access-Control-Allow-Origin=*, Date=Fri, 28 Feb 2020 05:41:26 GMT, expect-ct=max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct", Server=cloudflare, Etag=W/"1c-NmpazMScs9tOqR7eDEesn+pqC9Q", x-powered-by=Express, Content-Type=application/json; charset=utf-8, Content-Length=28, Via=1.1 vegur, cf-cache-status=DYNAMIC}
with custom headers
NetworkCall(data: ["username":"sahil.manchanda2#gmail.com"], headers: ["custom-header-key" : "custom-header-value"], url: "https://httpbin.org/post", method: .post).executeQuery(){(result: Result) in
switch result{
case .success(let data):
print(data)
case .failure(let error):
print(error)
}
}
output:
Service: https://httpbin.org/post
data: ["username": "sahil.manchanda2#gmail.com"]
{
"args": {},
"data": "{\"username\":\"sahil.manchanda2#gmail.com\"}",
"files": {},
"form": {},
"headers": {
"Accept": "*/*",
"Accept-Encoding": "br;q=1.0, gzip;q=0.9, deflate;q=0.8",
"Accept-Language": "en;q=1.0",
"Content-Length": "41",
"Content-Type": "application/json",
"Custom-Header-Key": "custom-header-value",
"Host": "httpbin.org",
"User-Agent": "NetworkCall/1.0 (sahil.NetworkCall; build:1; iOS 13.2.2) Alamofire/5.0.2",
"X-Amzn-Trace-Id": "Root=1-5e58a94f-fab2f24472d063f4991e2cb8"
},
"json": {
"username": "sahil.manchanda2#gmail.com"
},
"origin": "182.77.56.154",
"url": "https://httpbin.org/post"
}
typeMismatch(Swift.String, Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode String but found a dictionary instead.", underlyingError: nil))
In the last example you can see typeMismatch at the end, I tried to pass [String:Any] in the executeQuery but since the Any doesn't confirm to encodable I had to use String.
I use EVReflection with alamofire and i think this is one of the best combination to work with.
Use URLRequestConvertible protocol of Alamofire.
This is what i follow.
Just for reference purpose.
Make enum for your all endpoint and confirm that enum to URLRequestConvertible.
enum Router: URLRequestConvertible {
//your all endpoint
static var authToken = ""
case login([String:Any])
var route: Route {
switch self {
case .Login(let dict):
return Route(endPoint: "api/addimagedata", httpMethod: .post)
}
}
func asURLRequest() throws -> URLRequest {
var requestUrl = EnvironmentVariables.baseURL
if let queryparams = route.queryParameters {
requestUrl.appendQueryParameters(queryparams)
}
var mutableURLRequest = URLRequest(url: requestUrl.appendingPathComponent(route.endPath))
mutableURLRequest.httpMethod = route.method.rawValue
//FIXME:- Change the Userdefault Key
if Router.authToken.isEmpty, let token = UserDefaults.standard.string(forKey: "Key"), !token.isEmpty {
Router.authToken = token
}
//FIXME:- Set Mutable Request Accordingly
mutableURLRequest.setValue("Bearer \(Router.authToken)", forHTTPHeaderField: "Authorization")
mutableURLRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
mutableURLRequest.setValue("application/json", forHTTPHeaderField: "Accept")
if route.method == .get {
return try Alamofire.URLEncoding.default.encode(mutableURLRequest, with: route.parameters)
}
return try Alamofire.JSONEncoding.default.encode(mutableURLRequest, with: route.parameters)
}
}
Make One Structure as per your requirement.
struct Route {
let endPath: String
let method: Alamofire.HTTPMethod
var parameters: Parameters?
var queryParameters : [String:String]?
var encoding: Alamofire.ParameterEncoding {
switch method {
case .post, .put, .patch, .delete:
return JSONEncoding()
default:
return URLEncoding()
}
}
}
Now make one generic function that accept URLRequestConvertible and return your model in closure. Something like this.
func GenericApiCallForObject<T : URLRequestConvertible, M : EVObject>(router : T, showHud : Bool = true ,responseModel : #escaping (M) -> ()) {
view.endEditing(true)
if !isConnectedToInternet {
showNetworkError()
return
}
if showhud ? showHud() : ()
Alamofire.request(router).responseObject { (response: DataResponse<M>) in
self.HandleResponseWithErrorForObject(response: response) { (isSuccess) in
if isSuccess {
if let value = response.result.value {
responseModel(value)
}
}
})
}
}
Now make one generic function that accept your response and handle the error for you. Something like this.
func HandleResponseWithErrorForObject<M : EVObject>(response : DataResponse<M>, isSuccess : #escaping (Bool) -> ()) {
print(response)
hideHud()
switch response.response?.statusCode ?? 0 {
case 200...299:
isSuccess(true)
case 401:
isSuccess(false)
showSessionTimeOutError()
case -1005,-1001,-1003:
break
default:
isSuccess(false)
// Parse your response and show error in some way.
}
}
Now Finally, how to use it right??! Indeed now its very simple just two lines of code and you are good to go.
GenericApiCallForObject(router: Router.Login(["xyz":"xyz"])) { (response : GeneralModel) in
print(response)
}
Please note that this will only work if you are getting object in response. If there is an array or string you have to make separate function for that and procedure for that is same as above. You will only get response if there is a success otherwise HandleResponseWithErrorForObject function will automatically handle it for you. Also, some variables might be missing in above explanation.
I'm sharing a specific part for error handling on my REST api.
It will decode inside the following block and probably you can use it for reference.
As you can see that's very simple getting a code and translate into an enumeration.
Alamofire allow that but it depends on your version of library.
Sometimes depends your REST api how handle errors internally, they can not throw a code for example if its Java backend, they can encapsulate the exceptions.
public enum RESTError: Error {
case BadRequest(String, [String]?)
case InternalError(String)
case UnAuthorized(String, [String]?)
case NotFound(String)
case Success
/// <#Description#>
///
/// - Parameters:
/// - code: <#code description#>
/// - message: <#message description#>
/// - globalErrors: <#globalErrors description#>
/// - Returns: <#return value description#>
public static func fromCode(code: Int, message: String, globalErrors: [String]? = nil) -> RESTError {
switch code {
case 400: return RESTError.BadRequest(message, globalErrors)
case 401: return RESTError.UnAuthorized(message, globalErrors)
case 500: return RESTError.InternalError(message)
case 404: return RESTError.NotFound(message)
default: break
}
return RESTError.Success
}
}
Alamofire.request(urlRequest)
.validate(statusCode: 200...500)
.responseJSON(completionHandler: { (response: (DataResponse<Any>)) in
if let statusCode = response.response?.statusCode {
if statusCode != 200 {
// call handler errors function with specific message
if let arrayDictionary = response.result.value as? Dictionary<String,AnyObject> {
var error: RESTError?
if let code = arrayDictionary["status"] as? Int {
let message = arrayDictionary["message"] as! String
let globalErrors = arrayDictionary["globalErrors"] as? [String]
error = RESTError.fromCode(code: code, message: message, globalErrors: globalErrors)
} else {
// Build from error message without code.
let message = arrayDictionary["error_description"] as! String
let codeMsg = arrayDictionary["error"] as! String
let globalErrors = arrayDictionary["globalErrors"] as? [String]
if codeMsg == "invalid_token" && message.starts(with: "Access token expired") {
return
} else {
error = RESTError.fromCode(code: codeMsg, message: message, globalErrors: globalErrors)
}
}
if let _ = error {
errorHandler(error!)
} else {
errorHandler(RESTError.InternalError("Internal API rest error."))
}
} else {
errorHandler(RESTError.fromCode(code: statusCode, message: ""))
}
} else {
if let arrayDictionary = response.result.value as? Dictionary<String,AnyObject> {
handler(arrayDictionary)
}
}
} else {
if let error = response.error {
errorHandler(RESTError.InternalError(error.localizedDescription))
}
}
})
You probably need this function that uses the alamofilre Session Manager to perform requests. You can also set the cookies ant headers etc.. to this session manager so that you will have them to the rest of your requests.
import Alamofire
class NetworkManager : NSObject {
internal typealias SuccessCompletion = (Int?, Any?) -> Void?
internal typealias FailCompletion = (Int?, Error, Any?) -> Void?
var sessionManager : SessionManager!
var request : Request?
var headers : HTTPHeaders! = [:]
override init() {
let configuration = URLSessionConfiguration.default
configuration.httpAdditionalHeaders = SessionManager.defaultHTTPHeaders
sessionManager = SessionManager(configuration: configuration)
}
func sendRequest(url: String?, method: String, parameters: [String: Any], success: SuccessCompletion?, fail: FailCompletion?){
var encoding : ParameterEncoding!
if HTTPMethod(rawValue: method) == HTTPMethod.post {
encoding = JSONEncoding.default
} else {
encoding = URLEncoding.default
}
request = sessionManager.request(url ?? "", method: HTTPMethod(rawValue: method)!, parameters: parameters, encoding: encoding, headers: headers)
.validate()
.responseData{response in
switch (response.result) {
case .success:
let statusCode = response.response?.statusCode
success?(statusCode, response.result.value)
self.request = nil
break
case .failure(let error):
let statusCode = response.response?.statusCode
fail?(statusCode, error, response.data)
self.request = nil
break
}
}
}
}
EDIT
To add Headers you can just add a function like this..
func updateJSONHeader(token: String) {
self.clearHeaders()
headers["AuthorizationToken"] = "\(token)"
}
For cookie
func setCookie(_ cookie : HTTPCookie?){
if let cookie = cookie {
HTTPCookieStorage.shared.setCookie(cookie)
}
}
Clear headers
func clearHeaders(){
headers = [:]
}
And keep in mind that it's a singleton class so whenever you change anything unless your server make some changes you still have your configuration, ex. the headers
The best way is create a custom validate method using DataRequest extension:
func customValidate() -> Self {
return self.validate { _, response, data -> Request.ValidationResult in
guard (400...599) ~= response.statusCode else { return .success(()) }
guard let data = data else { return .failure(MyAppGeneralError.generalResponseError) }
guard let errorResponse = try? JSONDecoder().decode(MyAppResponseError.self, from: data) else {
return .failure(MyAppGeneralError.generalResponseError)
}
if response.statusCode == 401 {
return .failure(MyAppGeneralError.unauthorizedAccessError(errorResponse))
}
return .failure(MyAppGeneralError.responseError(errorResponse))
}
}
With a client with a generic function where the generic is decodable using our custom validate.
class APIClient {
var session: Session
init(session: Session = Session.default) {
self.session = session
}
#discardableResult
func performRequest<T: Decodable>(request: URLRequestConvertible,
decoder: JSONDecoder = JSONDecoder(),
completion: #escaping (Result<T, AFError>) -> Void) -> DataRequest {
return AF.request(request).customValidate().responseDecodable(decoder: decoder, completionHandler: { (response: DataResponse<T, AFError>) in
completion(response.result)
})
}
func getProfile(userID: Int, _ completion: #escaping (Result<UserToken, AFError>) -> Void) {
performRequest(request: APIRouter.profile(userID: userID), completion: completion)
}
}
using a router a:
enum APIRouter: URLRequestConvertible {
case profile(userId :Int)
static let baseURLString = "https://myserver.com"
var method: HTTPMethod {
switch self {
case .profile:
return .get
}
}
var path: String {
switch self {
case .profile(let userID):
return "profile/\(userID)"
}
}
var body: Parameters {
return [:]
}
// MARK: URLRequestConvertible
func asURLRequest() throws -> URLRequest {
let url = try APIRouter.baseURLString.asURL()
var urlRequest = URLRequest(url: url.appendingPathComponent(path))
urlRequest.httpMethod = method.rawValue
// Common Headers
urlRequest.setValue("application/json", forHTTPHeaderField: "Accept")
// Encode body
urlRequest = try JSONEncoding.default.encode(urlRequest, with: body)
return urlRequest
}
}
import Foundation
import UIKit
import Alamofire
import SwiftyJSON
class AFWrapper: NSObject {
static let sharedInstance = AFWrapper()
//TODO :-
/* Handle Time out request alamofire */
func requestGETURL(_ strURL: String, success:#escaping (JSON) -> Void, failure:#escaping (Error) -> Void)
{
Alamofire.request(strURL).responseJSON { (responseObject) -> Void in
//print(responseObject)
if responseObject.result.isSuccess {
let resJson = JSON(responseObject.result.value!)
//let title = resJson["title"].string
//print(title!)
success(resJson)
}
if responseObject.result.isFailure {
let error : Error = responseObject.result.error!
failure(error)
}
}
}
func requestPOSTURL(_ strURL : String, params : [String : AnyObject]?, headers : [String : String]?, success:#escaping (JSON) -> Void, failure:#escaping (Error) -> Void){
Alamofire.request(strURL, method: .post, parameters: params, encoding: JSONEncoding.default, headers: headers).responseJSON { (responseObject) -> Void in
//print(responseObject)
if responseObject.result.isSuccess {
let resJson = JSON(responseObject.result.value!)
success(resJson)
}
if responseObject.result.isFailure {
let error : Error = responseObject.result.error!
failure(error)
}
}
}
}
This is something I have been working on! Not finished yet but could solve your issue. you can upgrade it to whatever you want.
typealias
typealias Closure<T> = (T)->()
typealias JSON = [String: Any]
Extension
extension JSONDecoder{
func decode<T : Decodable>(_ model : T.Type,
result : #escaping Closure<T>) ->Closure<Data>{
return { data in
if let value = try? self.decode(model.self, from: data){
result(value)
}
}
}
Protocol
//MARK:- protocol APIResponseProtocol
protocol APIResponseProtocol{
func responseDecode<T: Decodable>(to modal : T.Type,
_ result : #escaping Closure<T>) -> APIResponseProtocol
func responseJSON(_ result : #escaping Closure<JSON>) -> APIResponseProtocol
func responseFailure(_ error :#escaping Closure<String>)
}
Request:
let configuration = URLSessionConfiguration.default
configuration.timeoutIntervalForRequest = 300 // seconds
configuration.timeoutIntervalForResource = 500
alamofireManager = Alamofire.SessionManager(configuration: configuration)
func getRequest(forAPI api: String, params: JSON) -> APIResponseProtocol {
let responseHandler = APIResponseHandler()
var parameters = params
parameters["token"] = preference.string(forKey: USER_ACCESS_TOKEN)
alamofireManager.request(api,
method: .get,
parameters: parameters,
encoding: URLEncoding.default,
headers: nil)
.responseJSON { (response) in
print("Å api : ",response.request?.url ?? ("\(api)\(params)"))
switch response.result{
case .success(let value):
let json = value as! JSON
let error = json.string("error")
guard error.isEmpty else{
responseHandler.handleSuccess(value: value,data: response.data ?? Data())
case .failure(let error):
responseHandler.handleFailure(value: error.localizedDescription)
}
}
return responseHandler
}
Response Hanlder:
class APIResponseHandler : APIResponseProtocol{
init(){
}
var jsonSeq : Closure<JSON>?
var dataSeq : Closure<Data>?
var errorSeq : Closure<String>?
func responseDecode<T>(to modal: T.Type, _ result: #escaping Closure<T>) -> APIResponseProtocol where T : Decodable {
let decoder = JSONDecoder()
self.dataSeq = decoder.decode(modal, result: result)
return self
}
func responseJSON(_ result: #escaping Closure<JSON>) -> APIResponseProtocol {
self.jsonSeq = result
return self
}
func responseFailure(_ error: #escaping Closure<String>) {
self.errorSeq = error
}
func handleSuccess(value : Any,data : Data){
if let jsonEscaping = self.jsonSeq{
jsonEscaping(value as! JSON)
}
if let dataEscaping = dataSeq{
dataEscaping(data)
}
}
func handleFailure(value : String){
self.errorSeq?(value)
}
}
USAGE:
self?.apiInteractor?
.getRequest(forAPI: "https://maps.googleapis.com/maps/api/directions/json",
params: [
"origin" : "\(pickUpLatitude),\(pickUpLongitude)",
"destination" :"\(dropLatitude),\(dropLongitude)",
"mode" : "driving",
"units" : "metric",
"sensor" : "true",
"key" : "\(UserDefaults.value(for: .google_api_key) ?? "")"
])
.responseDecode(to: GoogleGeocode.self, { [weak self] (googleGecode) in
guard let welf = self,
let route = googleGecode.routes.first,
let leg = route.legs.first else{return}
welf.tripDetailModel?.arrivalFromGoogle = leg.duration.text ?? ""
welf.drawRoute(forRoute: route)
welf.calculateETA()
})
.responseJSON({ (json) in
debugPrint(json.description)
})
.responseFailure({ (error) in
debug(print: error)
})
just part of code, but try
let req = Alamofire.request(url, method: .get, parameters: nil)
then you can handle response code by using
req.response?.statusCode
and handle response by for example
req.responseString(completionHandler: <#T##(DataResponse<String>) -> Void#>)
or
req.responseJSON(completionHandler: <#T##(DataResponse<Any>) -> Void#>)
you have good example here

Codable for API request

How would I make this same API request through codables?
In my app, this function is repeated in every view that makes API calls.
func getOrders() {
DispatchQueue.main.async {
let spinningHUD = MBProgressHUD.showAdded(to: self.view, animated: true)
spinningHUD.isUserInteractionEnabled = false
let returnAccessToken: String? = UserDefaults.standard.object(forKey: "accessToken") as? String
let access = returnAccessToken!
let headers = [
"postman-token": "dded3e97-77a5-5632-93b7-dec77d26ba99",
"Authorization": "JWT \(access)"
]
let request = NSMutableURLRequest(url: NSURL(string: "https://somelink.com")! as URL,
cachePolicy: .useProtocolCachePolicy,
timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
if (error != nil) {
print(error!)
} else {
if let dataNew = data, let responseString = String(data: dataNew, encoding: .utf8) {
print("----- Orders -----")
print(responseString)
print("----------")
let dict = self.convertToDictionary(text: responseString)
print(dict?["results"] as Any)
guard let results = dict?["results"] as? NSArray else { return }
self.responseArray = (results) as! [HomeVCDataSource.JSONDictionary]
DispatchQueue.main.async {
spinningHUD.hide(animated: true)
self.tableView.reloadData()
}
}
}
})
dataTask.resume()
}
}
I would suggest to do the following
Create Base Service as below
import UIKit
import Foundation
enum MethodType: String {
case get = "GET"
case post = "POST"
case put = "PUT"
case patch = "PATCH"
case delete = "DELETE"
}
class BaseService {
var session: URLSession!
// MARK: Rebuilt Methods
func FireGenericRequest<ResponseModel: Codable>(url: String, methodType: MethodType, headers: [String: String]?, completion: #escaping ((ResponseModel?) -> Void)) {
UIApplication.shared.isNetworkActivityIndicatorVisible = true
// Request Preparation
guard let serviceUrl = URL(string: url) else {
print("Error Building URL Object")
return
}
var request = URLRequest(url: serviceUrl)
request.httpMethod = methodType.rawValue
// Header Preparation
if let header = headers {
for (key, value) in header {
request.setValue(value, forHTTPHeaderField: key)
}
}
// Firing the request
session = URLSession(configuration: URLSessionConfiguration.default)
session.dataTask(with: request) { (data, response, error) in
DispatchQueue.main.async {
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
if let data = data {
do {
guard let object = try? JSONDecoder().decode(ResponseModel.self , from: data) else {
print("Error Decoding Response Model Object")
return
}
DispatchQueue.main.async {
completion(object)
}
}
}
}.resume()
}
private func buildGenericParameterFrom<RequestModel: Codable>(model: RequestModel?) -> [String : AnyObject]? {
var object: [String : AnyObject] = [String : AnyObject]()
do {
if let dataFromObject = try? JSONEncoder().encode(model) {
object = try JSONSerialization.jsonObject(with: dataFromObject, options: []) as! [String : AnyObject]
}
} catch (let error) {
print("\nError Encoding Parameter Model Object \n \(error.localizedDescription)\n")
}
return object
}
}
the above class you may reuse it in different scenarios adding request object to it and passing any class you would like as long as you are conforming to Coddle protocol
Create Model Conforming to Coddle protocol
class ExampleModel: Codable {
var commentId : String?
var content : String?
//if your JSON keys are different than your property name
enum CodingKeys: String, CodingKey {
case commentId = "CommentId"
case content = "Content"
}
}
Create Service to the specific model with the endpoint constants subclassing to BaseService as below
class ExampleModelService: BaseService<ExampleModel/* or [ExampleModel]*/> {
func GetExampleModelList(completion: ((ExampleModel?)/* or [ExampleModel]*/ -> Void)?) {
super.FireRequestWithURLSession(url: /* url here */, methodType: /* method type here */, headers: /* headers here */) { (responseModel) in
completion?(responseModel)
}
}
}
Usage
class MyLocationsController: UIViewController {
// MARK: Properties
// better to have in base class for the controller
var exampleModelService: ExampleModelService = ExampleModelService()
// MARK: Life Cycle Methods
override func viewDidLoad() {
super.viewDidLoad()
exampleModelService.GetExampleModelList(completion: { [weak self] (response) in
// model available here
})
}
}
Basically, you need to conform Codable protocol in your model classes, for this you need to implement 2 methods, one for code your model and another for decode your model from JSON
func encode(to encoder: Encoder) throws
required convenience init(from decoder: Decoder) throws
After that you will be able to use JSONDecoder class provided by apple to decode your JSON, and return an array (if were the case) or an object of your model class.
class ExampleModel: Codable {
var commentId : String?
var content : String?
//if your JSON keys are different than your property name
enum CodingKeys: String, CodingKey {
case commentId = "CommentId"
case content = "Content"
}
}
Then using JSONDecoder you can get your model array like this
do {
var arrayOfOrders : [ExampleModel] = try JSONDecoder().decode([ExampleModel].self, from: dataNew)
}
catch {
}
First of all, I can recommend you to use this application -quicktype- for turning json file to class or struct (codable) whatever you want. enter link description here.
After that you can create a generic function to get any kind of codable class and return that as a response.
func taskHandler<T:Codable>(type: T.Type, useCache: Bool, urlRequest: URLRequest, completion: #escaping (Result<T, Error>) -> Void) {
let task = URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in
if let error = error {
print("error : \(error)")
}
if let data = data {
do {
let dataDecoded = try JSONDecoder().decode(T.self, from: data)
completion(.success(dataDecoded))
// if says use cache, let's store response data to cache
if useCache {
if let response = response as? HTTPURLResponse {
self.storeDataToCache(urlResponse: response, urlRequest: urlRequest, data: data)
}
}
} catch let error {
completion(.failure(error))
}
} else {
completion(.failure(SomeError))
}
}
task.resume()
}

Web service is called twice

I have a problem with a webService call.
The problem is that when I call the service, and debug code, and print log in console, I'm sure my webService is only called once (log print once in console), but my request is apparently sent twice to the server and I have duplicate data in the list.
I know that it's not a server-side problem because it only happens on IOS (not Android).
Here is my code for call services:
public class PersistencyManager {
public func SendPostHttpRequest(baseURL: String, parameter: [String:Any], content: String, closure:#escaping ((_ success:JSON,_ error:NSError?) -> Void)) {
let manager = Alamofire.SessionManager.default
debugPrint("Request parameter ------>",parameter)
debugPrint(" Service URL -------> \(baseURL)")
if let url = URL(string: baseURL) {
var urlRequest = URLRequest(url: url)
urlRequest.setValue("text/html; charset=utf-8", forHTTPHeaderField: "Content-Type")
urlRequest.setURLEncodedFormData(parameters: parameter)
manager.request(urlRequest).responseJSON { response in
switch response.result {
case .success(let JSON) :
debugPrint("get Json response ---> \((JSON)) ")
closure(JSON,nil)
case .failure(let error):
closure(nil,error as NSError)
debugPrint("get error ---> \((error.localizedDescription)) ")
}
}
}
}
}
class LibraryAPI {
static let shareInstance : LibraryAPI = { LibraryAPI() }()
private let persistencyManager : PersistencyManager
init() {
persistencyManager = PersistencyManager()
}
func GetPostResponse(baseURL : String,parameters:[String:Any],contentType: String,closure:#escaping ((_ success:PersistencyManager.JSON,_ error:NSError?) -> Void)) {
persistencyManager.SendPostHttpRequest(baseURL: baseURL, parameter: parameters, content: contentType, closure: { success, error in
closure(success, error)
})
}
}
class TransactionAPI: TransactionProtocol {
static let shareInstance: TransactionAPI = {TransactionAPI()}()
func AddNewManagerRequest(_ parameter: [String : Any], closure: #escaping (([String : Any]?, NSError?) -> Void)) {
let url = Constants.BaseURL + Constants.K_NEWREQPORTERAGE
LibraryAPI.shareInstance.GetPostResponse(baseURL: url, parameters: parameter, contentType: "JSON", closure: {success,error in
var response: [String:Any]?
if let json = success as? [String: Any] {
response = json
}
closure(response, error)
})
}
}
class AddNewOrderViewController: MainViewController {
private func RegisterForNewPorterageRequest() {
let time = Utilities.shareInstance.GetSystemTime()
guard let userID = UserDefaults.standard.value(forKey: "user_id") as? String else {
return
}
StartActivity(activityColor: Constants.ACTIVITY_COLOR)
let token = TokenCreator.shareInstance.CreateTokenWithUserID(userID: userID, methodName: Constants.M_NEWREQUESTPORTERAGE)
request.tok = token
request.time = time
request.user_id = userID
let jsonModel = Utilities.shareInstance.GetJsonForm(objectClass: request)
TransactionAPI.shareInstance.AddNewManagerRequest(jsonModel, closure: {[weak self] success,error in
guard let strongSelf = self else{
return
}
if error != nil {
OperationQueue.main.addOperation {
strongSelf.StopActivity()
strongSelf.CreateCustomTopField(text: Constants.serverError, color: Constants.ERROR_COLOR)
}
}
else {
if let response = success {
debugPrint("add request service call once")
if let status = response["status"] as? String {
if status == "succ" {
OperationQueue.main.addOperation {
strongSelf.presentResultAlert()
}
}else {
OperationQueue.main.addOperation {
strongSelf.StopActivity()
strongSelf.CreateCustomTopField(text: Constants.send_data_error, color: Constants.ERROR_COLOR)
}
}
}
}
}
})
}
}
After adding log to server, I made sure my request was sent twice to server.
All console log print once in console.
I don't know when I call service twice, and why my request was sent twice to the server.
I don't understand how the log be displayed once, but the service has been called twice?
Any help appreciated.
It's really confusing, but it works perfectly with this method.
i have this method in persistencyMangerClass and i using this method instead SendPostHttpRequest.What really is the difference between these two methods. :|
public func SendMultiPartRequestWith(baseUrl: String, parameters: [String : Any],closure: #escaping ((_ success:JSON,_ error:NSError? ) -> Void)){
let manager = Alamofire.SessionManager.default
manager.session.configuration.timeoutIntervalForRequest = 30
manager.session.configuration.timeoutIntervalForResource = 15
debugPrint(" Service URL -------> \(baseUrl)")
debugPrint("Request parameter ------>",parameters)
let headers: HTTPHeaders = [
"Content-type": "multipart/form-data"
]
manager.upload(multipartFormData: { (multipartFormData) in
for (key, value) in parameters {
if let data = value as? Data {
let fileName = (key as String) + ".jpg"
let mimType = (key as String) + "/jpg"
multipartFormData.append(data, withName: key as String, fileName: fileName, mimeType: mimType)
}
else {
if let v = value as? String {
multipartFormData.append("\(v)".data(using: String.Encoding.utf8)!, withName: key as String)
}else {
multipartFormData.append("".data(using: String.Encoding.utf8)!, withName: key as String)
}
}
}
}, usingThreshold: UInt64.init(), to: baseUrl, method: .post, headers: headers) { (result) in
switch result{
case .success(let upload, _, _):
upload.responseString { response in
if let err = response.error{
closure(nil, err as NSError)
return
}
if let JSON = response.result.value {
closure(JSON, nil)
}
}
case .failure(let error):
closure(nil, error as NSError)
}
}
}

Make REST API call in Swift

I'm trying to use Swift to make a GET call to a REST API, and have tried to follow numerous tutorials, but can't figure it out. Either because I cannot figure out how to translate all the Obj-C to Swift, or because half of the methods n' such are deprecated. Does anyone know how to make the call, and parse returned JSON data?
Swift 5 & 4
let params = ["username":"john", "password":"123456"] as Dictionary<String, String>
var request = URLRequest(url: URL(string: "http://localhost:8080/api/1/login")!)
request.httpMethod = "POST"
request.httpBody = try? JSONSerialization.data(withJSONObject: params, options: [])
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
let session = URLSession.shared
let task = session.dataTask(with: request, completionHandler: { data, response, error -> Void in
print(response!)
do {
let json = try JSONSerialization.jsonObject(with: data!) as! Dictionary<String, AnyObject>
print(json)
} catch {
print("error")
}
})
task.resume()
You can do like this :
var url : String = "http://google.com?test=toto&test2=titi"
var request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: url)
request.HTTPMethod = "GET"
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue(), completionHandler:{ (response:NSURLResponse!, data: NSData!, error: NSError!) -> Void in
var error: AutoreleasingUnsafeMutablePointer<NSError?> = nil
let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary
if (jsonResult != nil) {
// process jsonResult
} else {
// couldn't load JSON, look at error
}
})
EDIT : For people have problem with this maybe your JSON stream is an
array [] and not an object {} so you have to change jsonResult to
NSArray instead of NSDictionary
I think the NSURLSession api fits better in this situation. Because if you write swift code your project target is at least iOS 7 and iOS 7 supports NSURLSession api. Anyway here is the code
let url = "YOUR_URL"
NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: url)) { data, response, error in
// Handle result
}.resume()
Here is the complete code for REST API requests using NSURLSession in swift
For GET Request
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let urlString = NSString(format: "your URL here")
print("get wallet balance url string is \(urlString)")
//let url = NSURL(string: urlString as String)
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%#", urlString) as String)
request.HTTPMethod = "GET"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let dataTask = session.dataTaskWithRequest(request) {
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
print("response is \(response)")
do {
let getResponse = try NSJSONSerialization.JSONObjectWithData(receivedData, options: .AllowFragments)
EZLoadingActivity .hide()
// }
} catch {
print("error serializing JSON: \(error)")
}
break
case 400:
break
default:
print("wallet GET request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
For POST request ...
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let params = ["username":bindings .objectForKey("username"), "provider":"walkingcoin", "securityQuestion":securityQuestionField.text!, "securityAnswer":securityAnswerField.text!] as Dictionary<String, AnyObject>
let urlString = NSString(format: “your URL”);
print("url string is \(urlString)")
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%#", urlString)as String)
request.HTTPMethod = "POST"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(params, options: [])
let dataTask = session.dataTaskWithRequest(request)
{
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
if response == "SUCCESS"
{
}
default:
print("save profile POST request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
I hope it works.
edited for swift 2
let url = NSURL(string: "http://www.test.com")
let task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, error) in
print(NSString(data: data!, encoding: NSUTF8StringEncoding))
}
task.resume()
Swift 4 - GET request
var request = URLRequest(url: URL(string: "http://example.com/api/v1/example")!)
request.httpMethod = "GET"
URLSession.shared.dataTask(with: request, completionHandler: { data, response, error -> Void in
do {
let jsonDecoder = JSONDecoder()
let responseModel = try jsonDecoder.decode(CustomDtoClass.self, from: data!)
print(responseModel)
} catch {
print("JSON Serialization error")
}
}).resume()
Don't forget to configure App Transport Security Settings to add your domain to the exceptions and allow insecure http requests if you're hitting endpoints without using HTTPS.
You can use a tool like http://www.json4swift.com/ to autogenerate your Codeable Mappings from your JSON responses.
In swift 3.3 and 4. I crated APIManager class with two public methods. Just pass required parameter, api name and request type. You will get response then pass it to the closure.
import UIKit
struct RequestType {
static let POST = "POST"
static let GET = "GET"
}
enum HtttpType: String {
case POST = "POST"
case GET = "GET"
}
class APIManager: NSObject {
static let sharedInstance: APIManager = {
let instance = APIManager()
return instance
}()
private init() {}
// First Method
public func requestApiWithDictParam(dictParam: Dictionary<String,Any>, apiName: String,requestType: String, isAddCookie: Bool, completionHendler:#escaping (_ response:Dictionary<String,AnyObject>?, _ error: NSError?, _ success: Bool)-> Void) {
var apiUrl = “” // Your api url
apiUrl = apiUrl.appendingFormat("%#", apiName)
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
let url = URL(string: apiUrl)!
let HTTPHeaderField_ContentType = "Content-Type"
let ContentType_ApplicationJson = "application/json"
var request = URLRequest.init(url: url)
request.timeoutInterval = 60.0
request.cachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
request.addValue(ContentType_ApplicationJson, forHTTPHeaderField: HTTPHeaderField_ContentType)
request.httpMethod = requestType
print(apiUrl)
print(dictParam)
let dataTask = session.dataTask(with: request) { (data, response, error) in
if error != nil {
completionHendler(nil, error as NSError?, false)
} do {
let resultJson = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]
print("Request API = ", apiUrl)
print("API Response = ",resultJson ?? "")
completionHendler(resultJson, nil, true)
} catch {
completionHendler(nil, error as NSError?, false)
}
}
dataTask.resume()
}
// Second Method
public func requestApiWithUrlString(param: String, apiName: String,requestType: String, isAddCookie: Bool, completionHendler:#escaping (_ response:Dictionary<String,AnyObject>?, _ error: NSError?, _ success: Bool)-> Void ) {
var apiUrl = "" // Your api url
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
var request: URLRequest?
if requestType == "GET" {
apiUrl = String(format: "%#%#&%#", YourAppBaseUrl,apiName,param)
apiUrl = apiUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
print("URL=",apiUrl)
let url = URL(string: apiUrl)!
request = URLRequest.init(url: url)
request?.httpMethod = "GET"
} else {
apiUrl = String(format: "%#%#", YourAppBaseUrl,apiName)
apiUrl = apiUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
print("URL=",apiUrl)
let bodyParameterData = param.data(using: .utf8)
let url = URL(string: apiUrl)!
request = URLRequest(url: url)
request?.httpBody = bodyParameterData
request?.httpMethod = "POST"
}
request?.timeoutInterval = 60.0
request?.cachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData
request?.httpShouldHandleCookies = true
let dataTask = session.dataTask(with: request!) { (data, response, error) in
if error != nil {
completionHendler(nil, error as NSError?, false)
} do {
if data != nil {
let resultJson = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]
print("Request API = ", apiUrl)
print("API Response = ",resultJson ?? "")
completionHendler(resultJson, nil, true)
} else {
completionHendler(nil, error as NSError?, false)
}
} catch {
completionHendler(nil, error as NSError?, false)
}
}
dataTask.resume()
}
}
// Here is example of calling Post API from any class
let bodyParameters = String(format: "appid=%#&appversion=%#","1","1")
APIManager.sharedInstance.requestApiWithUrlString(param: bodyParameters, apiName: "PASS_API_NAME", requestType: HtttpType.POST.rawValue, isAddCookie: false) { (dictResponse, error, success) in
if success {
if let dictMessage = dictResponse?["message"] as? Dictionary<String, AnyObject> {
// do you work
}
} else {
print("Something went wrong...")
}
}
}
/// Or just use simple function
func dataRequest() {
let urlToRequest = "" // Your API url
let url = URL(string: urlToRequest)!
let session4 = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
let paramString = "data=Hello"
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session4.dataTask(with: request as URLRequest) { (data, response, error) in
guard let _: Data = data, let _: URLResponse = response, error == nil else {
print("*****error")
return
}
if let dataString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue) {
print("****Data: \(dataString)") //JSONSerialization
}
}
task.resume()
}
Swift 3.0
let request = NSMutableURLRequest(url: NSURL(string: "http://httpstat.us/200")! as URL)
let session = URLSession.shared
request.httpMethod = "GET"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = session.dataTask(with: request as URLRequest, completionHandler: {data, response, error -> Void in
if error != nil {
print("Error: \(String(describing: error))")
} else {
print("Response: \(String(describing: response))")
}
})
task.resume()
Swift 4
Create an app using Alamofire with Api Post method
Install pod file -pod 'Alamofire', '~> 4.0' for Swift 3 with Xcode 9
Create Webservices.swift class, import Alamofire
Design storyBoard ,Login View
insert following Code for the ViewControllerClass
import UIKit
class ViewController: UIViewController {
#IBOutlet var usernameTextField: UITextField!
#IBOutlet var passwordTextField: UITextField!
var usertypeStr :String = "-----------"
var loginDictionary : NSDictionary?
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.
}
#IBAction func loginButtonClicked(_ sender: Any) {
WebServices.userLogin(userName: usernameTextField.text!, password: passwordTextField.text!,userType: usertypeStr) {(result, message, status )in
if status {
let loginDetails = result as? WebServices
self.loginDictionary = loginDetails?.loginData
if self.loginDictionary?["status"] as? String == "error"
{
self.alertMessage(alerttitle: "Login Error", (self.loginDictionary?["message"] as? String)!)
} else if self.loginDictionary?["status"] as? String == "ok" {
self.alertMessage(alerttitle: "", "Success")
}else {
self.alertMessage(alerttitle: "", (self.loginDictionary?["message"] as? String)!)
}
} else {
self.alertMessage(alerttitle: "", "Sorry")
}
}
}
func alertMessage(alerttitle:String,_ message : String){
let alertViewController = UIAlertController(title:alerttitle, message:message, preferredStyle: .alert)
alertViewController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertViewController, animated: true, completion: nil)
}
}
Insert Following Code For WebserviceClass
import Foundation
import Alamofire
class WebServices: NSObject {
enum WebServiceNames: String {
case baseUrl = "https://---------------"
case UserLogin = "------------"
}
// MARK: - Login Variables
var loginData : NSDictionary?
class func userLogin(userName: String,password : String,userType : String, completion : #escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> ()) {
let url = WebServiceNames.baseUrl.rawValue + WebServiceNames.UserLogin.rawValue
let params = ["USER": userName,"PASS":password,"API_Key" : userType]
WebServices.postWebService(urlString: url, params: params as [String : AnyObject]) { (response, message, status) in
print(response ?? "Error")
let result = WebServices()
if let data = response as? NSDictionary {
print(data)
result.loginData = data
completion(result, "Success", true)
}else {
completion("" as AnyObject?, "Failed", false)
}
}
}
//MARK :- Post
class func postWebService(urlString: String, params: [String : AnyObject], completion : #escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void) {
alamofireFunction(urlString: urlString, method: .post, paramters: params) { (response, message, success) in
if response != nil {
completion(response as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
class func alamofireFunction(urlString : String, method : Alamofire.HTTPMethod, paramters : [String : AnyObject], completion : #escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void){
if method == Alamofire.HTTPMethod.post {
Alamofire.request(urlString, method: .post, parameters: paramters, encoding: URLEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
print(urlString)
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}else {
Alamofire.request(urlString).responseJSON { (response) in
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
}
//Mark:-Cancel
class func cancelAllRequests()
{
Alamofire.SessionManager.default.session.getTasksWithCompletionHandler { dataTasks, uploadTasks, downloadTasks in
dataTasks.forEach { $0.cancel() }
uploadTasks.forEach { $0.cancel() }
downloadTasks.forEach { $0.cancel() }
}
}
}
swift 4
USE ALAMOFIRE in our App plz install pod file
pod 'Alamofire', '~> 4.0'
We can Use API for Json Data -https://swapi.co/api/people/
Then We can create A networking class for Our project- networkingService.swift
import Foundation
import Alamofire
typealias JSON = [String:Any]
class networkingService{
static let shared = networkingService()
private init() {}
func getPeople(success successblock: #escaping (GetPeopleResponse) -> Void)
{
Alamofire.request("https://swapi.co/api/people/").responseJSON { response in
guard let json = response.result.value as? JSON else {return}
// print(json)
do {
let getPeopleResponse = try GetPeopleResponse(json: json)
successblock(getPeopleResponse)
}catch{}
}
}
func getHomeWorld(homeWorldLink:String,completion: #escaping(String) ->Void){
Alamofire.request(homeWorldLink).responseJSON {(response) in
guard let json = response.result.value as? JSON,
let name = json["name"] as? String
else{return}
completion(name)
}
}
}
Then Create NetworkingError.swift class
import Foundation
enum networkingError : Error{
case badNetworkigStuff
}
Then create Person.swift class
import Foundation
struct Person {
private let homeWorldLink : String
let birthyear : String
let gender : String
let haircolor : String
let eyecolor : String
let height : String
let mass : String
let name : String
let skincolor : String
init?(json : JSON) {
guard let birthyear = json["birth_year"] as? String,
let eyecolor = json["eye_color"] as? String,
let gender = json["gender"] as? String,
let haircolor = json["hair_color"] as? String,
let height = json["height"] as? String,
let homeWorldLink = json["homeworld"] as? String,
let mass = json["mass"] as? String,
let name = json["name"] as? String,
let skincolor = json["skin_color"] as? String
else { return nil }
self.homeWorldLink = homeWorldLink
self.birthyear = birthyear
self.gender = gender
self.haircolor = haircolor
self.eyecolor = eyecolor
self.height = height
self.mass = mass
self.name = name
self.skincolor = skincolor
}
func homeWorld(_ completion: #escaping (String) -> Void) {
networkingService.shared.getHomeWorld(homeWorldLink: homeWorldLink){ (homeWorld) in
completion(homeWorld)
}
}
}
Then create DetailVC.swift
import UIKit
class DetailVC: UIViewController {
var person :Person!
#IBOutlet var name: UILabel!
#IBOutlet var birthyear: UILabel!
#IBOutlet var homeworld: UILabel!
#IBOutlet var eyeColor: UILabel!
#IBOutlet var skinColor: UILabel!
#IBOutlet var gender: UILabel!
#IBOutlet var hairColor: UILabel!
#IBOutlet var mass: UILabel!
#IBOutlet var height: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
print(person)
name.text = person.name
birthyear.text = person.birthyear
eyeColor.text = person.eyecolor
gender.text = person.gender
hairColor.text = person.haircolor
mass.text = person.mass
height.text = person.height
skinColor.text = person.skincolor
person.homeWorld{(homeWorld) in
self.homeworld.text = homeWorld
}
}
}
Then Create GetPeopleResponse.swift class
import Foundation
struct GetPeopleResponse {
let people : [Person]
init(json :JSON) throws {
guard let results = json["results"] as? [JSON] else { throw networkingError.badNetworkigStuff}
let people = results.map{Person(json: $0)}.flatMap{ $0 }
self.people = people
}
}
Then Our View controller class
import UIKit
class ViewController: UIViewController {
#IBOutlet var tableVieww: UITableView!
var people = [Person]()
#IBAction func getAction(_ sender: Any)
{
print("GET")
networkingService.shared.getPeople{ response in
self.people = response.people
self.tableVieww.reloadData()
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
guard segue.identifier == "peopleToDetails",
let detailVC = segue.destination as? DetailVC,
let person = sender as AnyObject as? Person
else {return}
detailVC.person = person
}
}
extension ViewController:UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return people.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = people[indexPath.row].name
return cell
}
}
extension ViewController:UITableViewDelegate{
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "peopleToDetails", sender: people[indexPath.row])
}
}
In our StoryBoard
plz Connect with our View with another one using segue with identifier -peopleToDetails
Use UITableView In our First View
Use UIButton For get the Data
Use 9 Labels in our DetailVc
Very simple 100% working , tested
var url : String = "https://restcountries.eu/rest/v2/all"
URLSession.shared.dataTask(with: NSURL(string: url) as! URL) { data, response, error in
// Handle result
let response = String (data: data!, encoding: String.Encoding.utf8)
print("response is \(response)")
do {
let getResponse = try JSONSerialization.jsonObject(with: data!, options: .allowFragments)
print(getResponse)
let countryArray = getResponse as! NSArray
print(countryArray)
let country1 = countryArray[0] as! [String:Any]
let name = country1["name"] as! String
print(name)
} catch {
print("error serializing JSON: \(error)")
}
}.resume()
}
If you're working in Swift 3, the syntax changes. The example here worked for me and has a good explanation of the steps: https://grokswift.com/simple-rest-with-swift/
This is the code from that tutorial:
let todoEndpoint: String = "https://jsonplaceholder.typicode.com/todos/1"
guard let url = URL(string: todoEndpoint) else {
print("Error: cannot create URL")
return
}
let urlRequest = URLRequest(url: url)
let task = session.dataTask(with: urlRequest) {
(data, response, error) in
// check for any errors
guard error == nil else {
print("error calling GET on /todos/1")
print(error!)
return
}
// make sure we got data
guard let responseData = data else {
print("Error: did not receive data")
return
}
// parse the result as JSON, since that's what the API provides
do {
guard let todo = try JSONSerialization.jsonObject(with: responseData, options: [])
as? [String: Any] else {
print("error trying to convert data to JSON")
return
}
// now we have the todo
// let's just print it to prove we can access it
print("The todo is: " + todo.description)
// the todo object is a dictionary
// so we just access the title using the "title" key
// so check for a title and print it if we have one
guard let todoTitle = todo["title"] as? String else {
print("Could not get todo title from JSON")
return
}
print("The title is: " + todoTitle)
} catch {
print("error trying to convert data to JSON")
return
}
}
task.resume()
Swift 5
API call method
//Send Request with ResultType<Success, Error>
func fetch(requestURL:URL,requestType:String,parameter:[String:AnyObject]?,completion:#escaping (Result<Any>) -> () ){
//Check internet connection as per your convenience
//Check URL whitespace validation as per your convenience
//Show Hud
var urlRequest = URLRequest.init(url: requestURL)
urlRequest.cachePolicy = .reloadIgnoringLocalCacheData
urlRequest.timeoutInterval = 60
urlRequest.httpMethod = String(describing: requestType)
urlRequest.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
urlRequest.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Accept")
//Post URL parameters set as URL body
if let params = parameter{
do{
let parameterData = try JSONSerialization.data(withJSONObject:params, options:.prettyPrinted)
urlRequest.httpBody = parameterData
}catch{
//Hide hude and return error
completion(.failure(error))
}
}
//URL Task to get data
URLSession.shared.dataTask(with: requestURL) { (data, response, error) in
//Hide Hud
//fail completion for Error
if let objError = error{
completion(.failure(objError))
}
//Validate for blank data and URL response status code
if let objData = data,let objURLResponse = response as? HTTPURLResponse{
//We have data validate for JSON and convert in JSON
do{
let objResposeJSON = try JSONSerialization.jsonObject(with: objData, options: .mutableContainers)
//Check for valid status code 200 else fail with error
if objURLResponse.statusCode == 200{
completion(.success(objResposeJSON))
}
}catch{
completion(.failure(error))
}
}
}.resume()
}
Use of API call method
func useOfAPIRequest(){
if let baseGETURL = URL(string:"https://postman-echo.com/get?foo1=bar1&foo2=bar2"){
self.fetch(requestURL: baseGETURL, requestType: "GET", parameter: nil) { (result) in
switch result{
case .success(let response) :
print("Hello World \(response)")
case .failure(let error) :
print("Hello World \(error)")
}
}
}
}
Api Call using Model Class
let urlString = "http://--.154.--.78/------/index.php?route=api/coupon/all"
let url = URL(string: urlString)
var request = URLRequest(url: url!)
request.httpMethod = "GET"
URLSession.shared.dataTask(with:request) { (data, response, error) in
if error != nil {
print(error)
} else {
do {
let parsedDictionaryArray = try JSONSerialization.jsonObject(with: data!) as! [String:AnyObject]
print(parsedDictionaryArray)
if let arry = parsedDictionaryArray["data"] as? [[String:AnyObject]] {
for dic in arry {
let name = dic["name"]
let descriptionData = dic["description"]
self.modelReference.append(model(name: name as! String, descriptionStr: descriptionData as! String))
print(name!)
}
}
} catch let error as NSError {
print(error)
}
}
}.resume()
create a variable and connect with model class
var modelReference = [model]()
create a model class New -> swift class
import Foundation
class model : NSObject{
var name : String
var descriptionStr: String
init(name : String, descriptionStr: String)
{
self.name = name
self.descriptionStr = descriptionStr
}
}
then we can connect with our table view objects
let cell = tableView.dequeueReusableCell(withIdentifier: "TableViewCellID")as! TableViewCell
cell.listName.text = modelReference[indexPath.row].name
let headers = [
"cache-control": "no-cache",
"postman-token": "6f8a-12c6-87a1-ac0f25d6385a"
]
let request = NSMutableURLRequest(url: NSURL(string: "Your url string")! as URL,
cachePolicy: .useProtocolCachePolicy,
timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
if error == nil && data != nil {
do {
// Convert NSData to Dictionary where keys are of type String, and values are of any type
let json = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as! [String:AnyObject]
print(json)
//do your stuff
// completionHandler(true)
} catch {
// completionHandler(false)
}
}
else if error != nil
{
//completionHandler(false)
}
}).resume()
}
func getAPICalling(mainUrl:String) {
//create URL
guard let url = URL(string: mainUrl) else {
print("Error: cannot create URL")
return
}
//create request
let urlRequest = URLRequest(url: url)
// create the session
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
// make the request
let task = session.dataTask(with: urlRequest) {
(data, response, error) in
// check for any errors
guard error == nil else {
print("error calling GET")
print(error!.localizedDescription)
return
}
// make sure we got data
guard let responseData = data else {
print("error: did not receive data")
return
}
// convert Data in JSON && parse the result as JSON, since that's what the API provides
do {
guard let object = try JSONSerialization.jsonObject(with: responseData, options: [])
as? [String: Any] else {
print("error trying to convert data to JSON")
return
}
//JSON Response
guard let todoTitle = object["response"] as? NSDictionary else {
print("Could not get todo title from JSON")
return
}
//Get array in response
let responseList = todoTitle.value(forKey: "radioList") as! NSArray
for item in responseList {
let dic = item as! NSDictionary
let str = dic.value(forKey: "radio_des") as! String
self.arrName.append(str)
print(item)
}
DispatchQueue.main.async {
self.tblView.reloadData()
}
} catch {
print("error trying to convert data to JSON")
return
}
}
task.resume()
}
Usage:
getAPICalling(mainUrl:"https://dousic.com/api/radiolist?user_id=16")
class ApiManager: NSObject {
static func callGetDataApi(url: String,completion: #escaping([[String: Any]])-> Void) {
guard let url = URL(string: ApiName.baseUrl+url ) else { return }
var request = URLRequest(url: url)
request.httpMethod = "GET"
URLSession.shared.dataTask(with:request) { (data, response, error) in
if error != nil {
print(error ?? "")
} else {
do {
let arry = try JSONSerialization.jsonObject(with: data!) as! [[String:AnyObject]]
print(arry)
DispatchQueue.main.async {
completion(arry)
}
} catch let error as NSError {
print(error)
}
}
}.resume()
}
}

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