i want to make REST API call in swift 3.0 with model classes of API code . Can any one help me to solved my issue?
let USER_LIST_FIRMWISE_URL = "\(BASE_URL2)user_list_firm_wise.php"
func userListFirmwiseRequest(firmid:String) -> URLRequest {
let Url = URL(string: (utility?.USER_LIST_FIRMWISE_URL)!)
var request = URLRequest(url: Url!)
request.httpMethod = "POST"
request.cachePolicy = .reloadIgnoringCacheData
let paramString = "firm_id=\(firmid)"
request.httpBody = paramString.data(using: String.Encoding.utf8)
return request
}
func getuserList() -> Void {
var request = mainApp.reqRes?.userListFirmwiseRequest(firmid: firmID)
request?.httpMethod = "POST"
print("request")
EZLoadingActivity.show("", disableUI: true)
let task = URLSession.shared.dataTask(with: request!) { (data: Data?, response: URLResponse?, error: Error?) in
DispatchQueue.main.async
{
do {
guard let data = data, error == nil else {
print("Error=\(String(describing: error))")
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200{
print("Status code should be 200, but is \(httpStatus.statusCode)")
print("Response String:\(String(describing: response))")
}
let jsonString = try? JSONSerialization.jsonObject(with: data, options: [])
guard let JsonObject = try? jsonString as AnyObject else{
return
}
guard let Success = try? JsonObject["success"] as! Int else{
return
}
print("Succee Resul :\(Success)")
if Success > 0{
guard let Message = try? JsonObject["message"] as Any else{
return
}
guard let JsonObjectForUser = try? Message as? AnyObject else {
return
}
}
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? NSDictionary ?? nil
if let parseJSON = json {
let dataDic = parseJSON.value(forKey: "message") as! NSMutableArray
self.arrayUserNameList = dataDic.value(forKey: "user_name") as! [String]
self.arrayUserData = dataDic
print(self.arrayUserNameList)
self.picker.reloadAllComponents()
EZLoadingActivity.hide()
}
} catch{
print(error)
EZLoadingActivity.hide()
}
}
}
task.resume()
}
i have used general code of NSurlsession for API call but it's too much code i have to write every time in every call. so i want common class for API CAll. but how to make common class for API call in swift 3.0
Try something like that
import Foundation
struct modelApi {
var arrayUserData: NSMutableArray = []
var arrayUserNameList: [String] = []
init(data:Data)
{
do {
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? NSDictionary ?? nil
if let parseJSON = json
{
let dataDic = parseJSON.value(forKey: "message") as! NSMutableArray
self.arrayUserNameList = dataDic.value(forKey: "user_name") as! [String]
self.arrayUserData = dataDic
}
}
catch
{
print("Error")
}
}
}
import Foundation
class HttpRequest{
static let TIME_OUT_FOR_RESOURCE = 60.0
static let TIME_OUT_FOR_REQUEST = 30
static func sendHttpGetRequest(endPoint:String,responseMsg:#escaping (_ responseString:String?,_ error:String?)->Void) {
// let JSON_CONTENT_TYPE = "application/json"
// let HTTP_OK = 200
//Content Types
//1 ""Content-Type" = "text/html; charset=UTF-8";"
//2 "Content-Type" = "application/json";
let url = URL.init(string: endPoint)
let session = URLSession.shared
session.configuration.timeoutIntervalForRequest = TimeInterval(TIME_OUT_FOR_REQUEST)
session.configuration.timeoutIntervalForResource = TimeInterval(TIME_OUT_FOR_RESOURCE)
let task = session.dataTask(with: url!) {
data,
response ,
error in
guard error == nil
else{
responseMsg(nil,error!.localizedDescription)
return }
let responseString = String.init(data: data!, encoding: String.Encoding.utf8)!
responseMsg(responseString,nil)
}
task.resume()
}
static func setHttpPostRequest(endPoint:String,param:[String:Any],responseMsg:#escaping (_ responseJson:[String:Any]?,_ error:String?)->Void){
let url = URL.init(string:endPoint)
let session = URLSession.shared
session.configuration.timeoutIntervalForRequest = TimeInterval(TIME_OUT_FOR_REQUEST)
session.configuration.timeoutIntervalForResource = TimeInterval(TIME_OUT_FOR_RESOURCE)
var request = URLRequest.init(url: url!)
request.httpMethod = "POST"
do{
request.httpBody = try JSONSerialization.data(withJSONObject: param, options: .prettyPrinted)
}catch let error{
print(error)
}
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 in
guard error == nil else {
responseMsg(nil,error?.localizedDescription)
return
}
guard let data = data else {
responseMsg(nil,"Something went wrong")
return
}
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
responseMsg(json,nil)
// print(json)
// handle json...
}
} catch let error {
responseMsg(nil,error.localizedDescription)
// print(error.localizedDescription)
}
})
task.resume()
}}
BASEWEBSERVICE_ClASS:
// where RTCommonResponse is common response Model class. generated by ahmad ali json exporter tool.
import UIKit
import KRProgressHUD
import Foundation
import SystemConfiguration
protocol BaseWebserviceDelegate {
func sucessful(data : RTCommonResponse)
func failedWithMessage(message : String)
}
class BaseWebservice: NSObject
{
var webData : NSMutableData!
var statusCode : Bool!
var appDelegate : AppDelegate!
var baseDelegate : BaseWebserviceDelegate!
let opQueue = OperationQueue()
func initWithDelegate(aDelegate : BaseWebserviceDelegate) {
baseDelegate = aDelegate
appDelegate = UIApplication.shared.delegate as! AppDelegate
//return self
}
func callWithBaseRequest(requestData : Dictionary<String, Any>, aURL : String, method : String, showHUD : Bool ) {
let hudShow = showHUD && BaseWebservice.isInternetAvailable()
let url4 = URL(string: aURL as String)!
//let session4 = URLSession(configuration: sessionConfiguration, delegate: self, delegateQueue: self.opQueue)
//let session4 = URLSession.shared
let session4: URLSession = {
let configuration = URLSessionConfiguration.default
configuration.timeoutIntervalForRequest = 9999
configuration.timeoutIntervalForResource = 9999
return URLSession(configuration: configuration, delegate: nil, delegateQueue: nil)
}()
let request = NSMutableURLRequest(url: url4)
request.httpMethod = method
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
//let paramString = "data=Hello"
//request.httpBody = paramString.data(using: String.Encoding.utf8)
if method == Constants.POST {
let cookieHeader = (requestData.flatMap({ (key, value) -> String in
return "\(key)=\(value)"
}) as Array).joined(separator: "&")
let postData : Data = cookieHeader.data(using: .utf8)!
request.httpBody = postData
AppDelegate.printLog(log: "Request started for url : " + aURL + " Peram : " + cookieHeader)
}
//request.addValue("multipart/form-data", forHTTPHeaderField: "Content-Type")
let task = session4.dataTask(with: request as URLRequest) { (data, response, error) in
guard let _: Data = data, let _: URLResponse = response, error == nil else {
print("*****error " + (error?.localizedDescription)!)
DispatchQueue.main.async {
KRProgressHUD.dismiss()
self.baseDelegate.failedWithMessage(message: (error?.localizedDescription)!)
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
return
}
let dataString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
// print("*****This is the data 4: \(String(describing: dataString))") //JSONSerialization
let dictionary: Dictionary? = self.convertToDictionary(text: dataString! as String)
//let content = Content.init(fromDictionary: dictionary!)
AppDelegate.printLog(log:"Responce recived for url : " + aURL)
if dictionary == nil {
DispatchQueue.main.async {
KRProgressHUD.dismiss()
self.baseDelegate.failedWithMessage(message: "Something went wrong, try after some time")
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
return
}
//self.baseDelegate.sucessful(data: commonResponse)
DispatchQueue.main.async {
let commonResponse : RTCommonResponse = RTCommonResponse.init(fromDictionary: dictionary!)
if commonResponse.status == "ok" {
self.baseDelegate.sucessful(data: commonResponse)
KRProgressHUD.dismiss()
}else{
let error : RTError = RTError.init(fromDictionary: commonResponse.data!)
KRProgressHUD.dismiss()
self.baseDelegate.failedWithMessage(message: error.error)
}
UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
}
//let task = session4.dataTask(with: request as URLRequest)
if hudShow {
DispatchQueue.main.async {
KRProgressHUD.show()
}
}
DispatchQueue.main.async {
UIApplication.shared.isNetworkActivityIndicatorVisible = true
}
// session4
task.resume()
}
func convertToDictionary(text: String) -> [String: Any]? {
if let data = text.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
}
}
return nil
}
static func isInternetAvailable() -> Bool
{
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags = SCNetworkReachabilityFlags()
if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
return false
}
let isReachable = flags.contains(.reachable)
let needsConnection = flags.contains(.connectionRequired)
return (isReachable && !needsConnection)
}
}
ForgotpasswordWS_Class:
// where RTForgotPasswordResponse is common response Model class. generated by ahamad ali json exporter tool.
import UIKit
protocol ForgotPasswordWebserviceDelegate {
func forgotPasswordSucessful(data : RTForgotPasswordResponse)
func forgotPasswordFailedWithMessage(message : String)
}
class ForgotPasswordWebservice: BaseWebservice {
var delegate : ForgotPasswordWebserviceDelegate!
init(aDelegate : ForgotPasswordWebserviceDelegate) {
super.init()
super.initWithDelegate(aDelegate: self as BaseWebserviceDelegate)
delegate = aDelegate
}
func initWithDelegate(aDelegate : ForgotPasswordWebserviceDelegate) {
super.initWithDelegate(aDelegate: self as BaseWebserviceDelegate)
delegate = aDelegate
//return self
}
func call(request : RTForgotPasswordRequest) {
let url = Constants.BASE_URL + "user/retrieve_password/"
self.callWithBaseRequest(requestData: request.toDictionary() , aURL: url, method: Constants.POST, showHUD: true)
}
}
extension ForgotPasswordWebservice : BaseWebserviceDelegate{
func sucessful(data : RTCommonResponse){
let content = RTForgotPasswordResponse.init(fromDictionary: data.data! )
//data.content = content
self.delegate.forgotPasswordSucessful(data: content)
}
func failedWithMessage(message : String){
self.delegate.forgotPasswordFailedWithMessage(message: message)
}
}
YourVIEWCONTROLLER_Class:
// just add extension to your view controller
extension yourViewController : ForgotPasswordWebserviceDelegate {
func forgotPasswordFailedWithMessage(message: String) {
let when = DispatchTime.now() + 1
DispatchQueue.main.asyncAfter(deadline:when){
self.showSnackBar(message: message)
}
}
func forgotPasswordSucessful(data: RTForgotPasswordResponse) {
let when = DispatchTime.now() + 1
DispatchQueue.main.asyncAfter(deadline:when) {
self.showSnackBar(message: data.msg)
//self.displayAlertMessage(messageToDisplay: "Reset Password Link Send")
}
}
}
// when you call API you have to write JUST line of CODE That's IT!!!
#IBAction func forgotbtntapped(_ sender: Any) {
let forgotws : ForgotPasswordWebservice = ForgotPasswordWebservice.init(aDelegate: self)
let forgotrequest : RTForgotPasswordRequest = RTForgotPasswordRequest();
forgotrequest.userLogin = forgotEmailTextField.text!
forgotws.call(request: forgotrequest)
}
Another simple way to call web API
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if indexPath.row == 0 {
cell.separatorInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: .greatestFiniteMagnitude)
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell : CCell = self.tblV.dequeueReusableCell(withIdentifier: "cell") as! CCell
cell.lblName?.text = "ABCD"
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
func getClassList(completion: ((NSArray?, NSError?) -> Void)?) {
let myUrl = URL(string: "http://papili.us/studycentral/api/getClassList.php");
var request = URLRequest(url:myUrl!)
request.httpMethod = "POST"// Compose a query string
let postString = "";
request.httpBody = postString.data(using: String.Encoding.utf8);
let task = URLSession.shared.dataTask(with: request) { (data: Data?, response: URLResponse?, error: Error?) in
if error != nil {
print("error=\(String(describing: error))")
completion?(nil, error as NSError?)
return
}
print("response = \(String(describing: response))")
//Convert response sent from a server side script to a NSDictionary object:
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
if json != nil {
let newdata : NSDictionary = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as! NSDictionary
let datalist : KRootClass = KRootClass.init(fromDictionary: newdata as! [String : Any])
print(datalist.classID)
print(datalist.className)
print(datalist.teacherTitle)
print(datalist.teacherLastName)
print(datalist.teacherFirstName)
}
} catch {
print(error)
completion?(nil, error as NSError)
}
}
task.resume()
}
Hi I am very beginner for Swift and I am trying to make NSURLSession "Post" request sending some parameter like my below code
According to my below code response not coming from server can some one help me please
BackGroundClass:-
import UIKit
protocol sampleProtocal{
func getResponse(result:NSDictionary)
func getErrorResponse(error:NSString)
}
class BackGroundClass: NSObject {
var delegate:sampleProtocal?
func callPostService(url:String,parameters:NSDictionary){
print("url is===>\(url)")
let request = NSMutableURLRequest(URL: NSURL(string:url)!)
let session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
//Note : Add the corresponding "Content-Type" and "Accept" header. In this example I had used the application/json.
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(parameters, options: [])
let task = session.dataTaskWithRequest(request) { data, response, error in
guard data != nil else {
print("no data found: \(error)")
return
}
do {
if let json = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
print("Response: \(json)")
self.mainResponse(json)
} else {
let jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding)// No error thrown, but not NSDictionary
print("Error could not parse JSON: \(jsonStr)")
self.eroorResponse(jsonStr!)
}
} catch let parseError {
print(parseError)// Log the error thrown by `JSONObjectWithData`
let jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding)
print("Error could not parse JSON: '\(jsonStr)'")
self.eroorResponse(jsonStr!)
}
}
task.resume()
}
func mainResponse(result:NSDictionary){
delegate?.getResponse(result)
}
func eroorResponse(result:NSString){
delegate?.getErrorResponse(result)
}
}
ViewController:-
import UIKit
class ViewController: UIViewController,sampleProtocal {
override func viewDidLoad() {
super.viewDidLoad()
let delegate = BackGroundClass();
delegate.self;
let params = ["scancode":"KK03799-008", "UserName":"admin"] as Dictionary<String, String>
let backGround=BackGroundClass();
backGround.callPostService("url", parameters: params)
}
func getResponse(result: NSDictionary) {
print("Final response is\(result)");
}
func getErrorResponse(error: NSString) {
print("Final Eroor code is\(error)")
}
}
Swift 4 post example with json payload-
func postAction(_ sender: Any) {
let Url = String(format: "your url")
guard let serviceUrl = URL(string: Url) else { return }
let parameterDictionary = ["username" : "Test", "password" : "123456"]
var request = URLRequest(url: serviceUrl)
request.httpMethod = "POST"
request.setValue("Application/json", forHTTPHeaderField: "Content-Type")
guard let httpBody = try? JSONSerialization.data(withJSONObject: parameterDictionary, options: []) else {
return
}
request.httpBody = httpBody
let session = URLSession.shared
session.dataTask(with: request) { (data, response, error) in
if let response = response {
print(response)
}
if let data = data {
do {
let json = try JSONSerialization.jsonObject(with: data, options: [])
print(json)
} catch {
print(error)
}
}
}.resume()
}
Try to run this function and print the response, it is in Swift 4.0.
Here, I have prepared codable structure:
struct LoginData: Codable {
var code: Int?
var message: String?
var status: String?
var token: String?
var data: DataSet?
}
struct DataSet: Codable {
var email : String?
var contactNo : String?
var firstName : String?
var lastName: String?
var dob : String?
var gender : String?
var address: String?
var city : String?
var state : String?
var country : String?
var zip : String?
var username: String?
}
If you get your response printed correctly then pass it to your viewController.
func loginWS(parameters:[String:String], completionHandler: #escaping (Any?) -> Swift.Void) {
guard let gitUrl = URL(string: BASE_URL+ACTION_URL) else { return }
print(gitUrl)
let request = NSMutableURLRequest(url: gitUrl)
// uncomment this and add auth token, if your project needs.
// let config = URLSessionConfiguration.default
// let authString = "Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyX2lkIjoxMywiUGFzc3dvcmQiOiIkMmEkMTAkYVhpVm9wU3JSLjBPYmdMMUk2RU5zdU9LQzlFR0ZqNzEzay5ta1pDcENpMTI3MG1VLzR3SUsiLCJpYXQiOjE1MTczOTc5MjV9.JaSh3FvpAxFxbq8z_aZ_4OhrWO-ytBQNu6A-Fw4pZBY"
// config.httpAdditionalHeaders = ["Authorization" : authString]
let session = URLSession.shared
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.httpBody = try! JSONSerialization.data(withJSONObject: parameters, options: [])
let task = session.dataTask(with: request as URLRequest) { data, response, error in
guard let data = data else { return }
do {
// let decoder = JSONDecoder()
// here replace LoginData with your codable structure.
let gitData = try JSONDecoder().decode(LoginData.self, from: data)
print("response data:", gitData)
completionHandler(gitData)
} catch let err {
print("Err", err)
}
}.resume()
}
Here is a sample complete solution compatible with Swift 4 and Swift 5.
Endpoint to create urls
struct Endpoint {
let path: String
let queryItems: [URLQueryItem]?
}
extension Endpoint {
var url: URL? {
var components = URLComponents()
components.scheme = "https"
components.host = "YOUR_HOST"
components.path = path
components.queryItems = queryItems
return components.url
}
}
User object model for request body
struct User: Encodable {
let name: String
let surname: String
let age: Int
// this is to customise init
init(name: String,
surname: String,
age: Int) {
self.name = name
self.surname = surname
self.age = age
}
enum CodingKeys: String, CodingKey {
case name, surname, age
}
}
UserResponse model for http response comes from API
struct UserResponse: Decodable {
let message: String
let userId: String?
enum CodingKeys: String, CodingKey {
case message, userId = "user_id" // API returns userId as "user_id"
}
}
APIClient make http requests for our api
protocol APIClientProtocol: Any {
func sendUser(_ user: User, completionBlock: #escaping (_ userResponse: UserResponse?, _ error: APIClient.Error?) -> Void)
}
class APIClient: APIClientProtocol {
fileprivate let defaultSession: URLSession = {
let configuration = URLSessionConfiguration.default
configuration.timeoutIntervalForRequest = 10.0
configuration.timeoutIntervalForResource = 10.0
return URLSession(configuration: configuration, delegate: nil, delegateQueue: nil)
}()
public init() { }
public func uploadUser(_ user: User, completionBlock: #escaping (UserResponse?, APIClient.Error?) -> Void) {
guard let url = Endpoint(path: "/user/upload", queryItems: nil).url else {
completionBlock(nil, .brokenURL)
return
}
var urlRequest = URLRequest(url: url)
urlRequest.httpMethod = "POST"
urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
urlRequest.addValue("application/json", forHTTPHeaderField: "Accept")
do {
let jsonData = try JSONEncoder().encode(user)
urlRequest.httpBody = jsonData
} catch {
completionBlock(nil, .serialization(error.localizedDescription))
return
}
let task = defaultSession.dataTask(with: urlRequest) { data, urlResponse, error in
if let error = error {
completionBlock(nil, .http(error.localizedDescription))
return
}
guard let httpResponse = urlResponse as? HTTPURLResponse else {
return
}
if httpResponse.statusCode == 200 {
guard let data = data else {
return
}
do {
let userResponse = try JSONDecoder().decode(UserResponse.self, from: data)
completionBlock(userResponse, nil)
} catch let error {
completionBlock(nil, .serialization(error.localizedDescription))
}
} else {
completionBlock(nil, .http("Status failed!"))
}
}
task.resume()
}
}
extension APIClient {
enum Error: Swift.Error, Equatable {
case brokenURL
case serialization(String)
case http(String)
}
}
Post Class
func post(params : Dictionary<String, String>, url : String) {
var request = NSMutableURLRequest(URL: NSURL(string: url))
var session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
var err: NSError?
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &err)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
println("Response: \(response)")
var strData = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Body: \(strData)")
var err: NSError?
var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error: &err) as? NSDictionary
// Did the JSONObjectWithData constructor return an error? If so, log the error to the console
if(err != nil) {
println(err!.localizedDescription)
let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Error could not parse JSON: '\(jsonStr)'")
}
else {
// The JSONObjectWithData constructor didn't return an error. But, we should still
// check and make sure that json has a value using optional binding.
if let parseJSON = json {
// Okay, the parsedJSON is here, let's get the value for 'success' out of it
var success = parseJSON["success"] as? Int
println("Succes: \(success)")
}
else {
// Woa, okay the json object was nil, something went worng. Maybe the server isn't running?
let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Error could not parse JSON: \(jsonStr)")
}
}
})
task.resume()
}
call This Method Like This
self.post(["username":"jameson", "password":"password"], url: "http://localhost:4567/login")
Hope It Helps :)
Http body is missing. Example - setting string paramets as body
let paramString = String(format:"param1=%#¶m2=%#",param1,param2)
request.httpBody = paramString.data(using: String.Encoding.utf8)
here just try
request.httpBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &err)
func getData(searchString:String,completion:#escaping(Any)->Void){
let url = "https://itunes.apple.com/search?term="+searchString
URLSession.shared.dataTask(with: URL.init(string: url)!){(data,response,err) in
if let responsedata = data{
DispatchQueue.main.async {
completion(responsedata)
}
}
}.resume()
}
Try this: (Swift 4.2)
public func submitDelivery(delivery:DeliveryModal,responseCode:String,completion:#escaping SubmitCompletionBlock){
let urlString = BaseURL.getURL(urlType: .submit(responseCode))
guard let url = URL(string: urlString) else { return }
var request : URLRequest = URLRequest(url: url)
request.httpMethod = HttpMethod.post.rawValue
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
do {
let jsonData = try encoder.encode(delivery)
request.httpBody = jsonData
} catch {
print(error.localizedDescription)
completion(nil,nil,NSError.init())
}
let dataTask = URLSession.shared.dataTask(with: request) {
data,response,error in
guard let data = data else {
completion(nil,response,NSError.init())
return
}
do {
let data = try JSONDecoder().decode(DeliverySubmitResponseModal.self, from: data)
DispatchQueue.main.async {
completion(data,response,error)
}
} catch let error {
debugPrint(error.localizedDescription)
}
}
dataTask.resume()
}
I read The Programming Language Swift by Apple in iBooks, but cannot figure out how to make an HTTP request (something like cURL) in Swift. Do I need to import Obj-C classes or do I just need to import default libraries? Or is it not possible to make an HTTP request based on native Swift code?
You can use URL, URLRequest and URLSession or NSURLConnection as you'd normally do in Objective-C. Note that for iOS 7.0 and later, URLSession is preferred.
Using URLSession
Initialize a URL object and a URLSessionDataTask from URLSession. Then run the task with resume().
let url = URL(string: "http://www.stackoverflow.com")!
let task = URLSession.shared.dataTask(with: url) {(data, response, error) in
guard let data = data else { return }
print(String(data: data, encoding: .utf8)!)
}
task.resume()
Using NSURLConnection
First, initialize a URL and a URLRequest:
let url = URL(string: "http://www.stackoverflow.com")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
Then, you can load the request asynchronously with:
NSURLConnection.sendAsynchronousRequest(request, queue: OperationQueue.main) {(response, data, error) in
guard let data = data else { return }
print(String(data: data, encoding: .utf8)!)
}
Or you can initialize an NSURLConnection:
let connection = NSURLConnection(request: request, delegate:nil, startImmediately: true)
Just make sure to set your delegate to something other than nil and use the delegate methods to work with the response and data received.
For more detail, check the documentation for the NSURLConnectionDataDelegate protocol
Testing on an Xcode playground
If you want to try this code on a Xcode playground, add import PlaygroundSupport to your playground, as well as the following call:
PlaygroundPage.current.needsIndefiniteExecution = true
This will allow you to use asynchronous code in playgrounds.
Check Below Codes :
1. SynchonousRequest
Swift 1.2
let urlPath: String = "YOUR_URL_HERE"
var url: NSURL = NSURL(string: urlPath)!
var request1: NSURLRequest = NSURLRequest(URL: url)
var response: AutoreleasingUnsafeMutablePointer<NSURLResponse?>=nil
var dataVal: NSData = NSURLConnection.sendSynchronousRequest(request1, returningResponse: response, error:nil)!
var err: NSError
println(response)
var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataVal, options: NSJSONReadingOptions.MutableContainers, error: &err) as? NSDictionary
println("Synchronous\(jsonResult)")
Swift 2.0 +
let urlPath: String = "YOUR_URL_HERE"
let url: NSURL = NSURL(string: urlPath)!
let request1: NSURLRequest = NSURLRequest(URL: url)
let response: AutoreleasingUnsafeMutablePointer<NSURLResponse?>=nil
do{
let dataVal = try NSURLConnection.sendSynchronousRequest(request1, returningResponse: response)
print(response)
do {
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(dataVal, options: []) as? NSDictionary {
print("Synchronous\(jsonResult)")
}
} catch let error as NSError {
print(error.localizedDescription)
}
}catch let error as NSError
{
print(error.localizedDescription)
}
2. AsynchonousRequest
Swift 1.2
let urlPath: String = "YOUR_URL_HERE"
var url: NSURL = NSURL(string: urlPath)!
var request1: NSURLRequest = NSURLRequest(URL: url)
let queue:NSOperationQueue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(request1, queue: queue, completionHandler:{ (response: NSURLResponse!, data: NSData!, error: NSError!) -> Void in
var err: NSError
var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
println("Asynchronous\(jsonResult)")
})
Swift 2.0 +
let urlPath: String = "YOUR_URL_HERE"
let url: NSURL = NSURL(string: urlPath)!
let request1: NSURLRequest = NSURLRequest(URL: url)
let queue:NSOperationQueue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(request1, queue: queue, completionHandler:{ (response: NSURLResponse?, data: NSData?, error: NSError?) -> Void in
do {
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
print("ASynchronous\(jsonResult)")
}
} catch let error as NSError {
print(error.localizedDescription)
}
})
3. As usual URL connection
Swift 1.2
var dataVal = NSMutableData()
let urlPath: String = "YOUR URL HERE"
var url: NSURL = NSURL(string: urlPath)!
var request: NSURLRequest = NSURLRequest(URL: url)
var connection: NSURLConnection = NSURLConnection(request: request, delegate: self, startImmediately: true)!
connection.start()
Then
func connection(connection: NSURLConnection!, didReceiveData data: NSData!){
self.dataVal?.appendData(data)
}
func connectionDidFinishLoading(connection: NSURLConnection!)
{
var error: NSErrorPointer=nil
var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataVal!, options: NSJSONReadingOptions.MutableContainers, error: error) as NSDictionary
println(jsonResult)
}
Swift 2.0 +
var dataVal = NSMutableData()
let urlPath: String = "YOUR URL HERE"
var url: NSURL = NSURL(string: urlPath)!
var request: NSURLRequest = NSURLRequest(URL: url)
var connection: NSURLConnection = NSURLConnection(request: request, delegate: self, startImmediately: true)!
connection.start()
Then
func connection(connection: NSURLConnection!, didReceiveData data: NSData!){
dataVal.appendData(data)
}
func connectionDidFinishLoading(connection: NSURLConnection!)
{
do {
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(dataVal, options: []) as? NSDictionary {
print(jsonResult)
}
} catch let error as NSError {
print(error.localizedDescription)
}
}
4. Asynchonous POST Request
Swift 1.2
let urlPath: String = "YOUR URL HERE"
var url: NSURL = NSURL(string: urlPath)!
var request1: NSMutableURLRequest = NSMutableURLRequest(URL: url)
request1.HTTPMethod = "POST"
var stringPost="deviceToken=123456" // Key and Value
let data = stringPost.dataUsingEncoding(NSUTF8StringEncoding)
request1.timeoutInterval = 60
request1.HTTPBody=data
request1.HTTPShouldHandleCookies=false
let queue:NSOperationQueue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(request1, queue: queue, completionHandler:{ (response: NSURLResponse!, data: NSData!, error: NSError!) -> Void in
var err: NSError
var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
println("AsSynchronous\(jsonResult)")
})
Swift 2.0 +
let urlPath: String = "YOUR URL HERE"
let url: NSURL = NSURL(string: urlPath)!
let request1: NSMutableURLRequest = NSMutableURLRequest(URL: url)
request1.HTTPMethod = "POST"
let stringPost="deviceToken=123456" // Key and Value
let data = stringPost.dataUsingEncoding(NSUTF8StringEncoding)
request1.timeoutInterval = 60
request1.HTTPBody=data
request1.HTTPShouldHandleCookies=false
let queue:NSOperationQueue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(request1, queue: queue, completionHandler:{ (response: NSURLResponse?, data: NSData?, error: NSError?) -> Void in
do {
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
print("ASynchronous\(jsonResult)")
}
} catch let error as NSError {
print(error.localizedDescription)
}
})
5. Asynchonous GET Request
Swift 1.2
let urlPath: String = "YOUR URL HERE"
var url: NSURL = NSURL(string: urlPath)!
var request1: NSMutableURLRequest = NSMutableURLRequest(URL: url)
request1.HTTPMethod = "GET"
request1.timeoutInterval = 60
let queue:NSOperationQueue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(request1, queue: queue, completionHandler:{ (response: NSURLResponse!, data: NSData!, error: NSError!) -> Void in
var err: NSError
var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
println("AsSynchronous\(jsonResult)")
})
Swift 2.0 +
let urlPath: String = "YOUR URL HERE"
let url: NSURL = NSURL(string: urlPath)!
let request1: NSMutableURLRequest = NSMutableURLRequest(URL: url)
request1.HTTPMethod = "GET"
let queue:NSOperationQueue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(request1, queue: queue, completionHandler:{ (response: NSURLResponse?, data: NSData?, error: NSError?) -> Void in
do {
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
print("ASynchronous\(jsonResult)")
}
} catch let error as NSError {
print(error.localizedDescription)
}
})
6. Image(File) Upload
Swift 2.0 +
let mainURL = "YOUR_URL_HERE"
let url = NSURL(string: mainURL)
let request = NSMutableURLRequest(URL: url!)
let boundary = "78876565564454554547676"
request.addValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
request.HTTPMethod = "POST" // POST OR PUT What you want
let session = NSURLSession(configuration:NSURLSessionConfiguration.defaultSessionConfiguration(), delegate: nil, delegateQueue: nil)
let imageData = UIImageJPEGRepresentation(UIImage(named: "Test.jpeg")!, 1)
var body = NSMutableData()
body.appendData("--\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
// Append your parameters
body.appendData("Content-Disposition: form-data; name=\"name\"\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("PREMKUMAR\r\n".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)!)
body.appendData("--\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Disposition: form-data; name=\"description\"\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("IOS_DEVELOPER\r\n".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)!)
body.appendData("--\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
// Append your Image/File Data
var imageNameval = "HELLO.jpg"
body.appendData("--\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Disposition: form-data; name=\"profile_photo\"; filename=\"\(imageNameval)\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Type: image/jpeg\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(imageData!)
body.appendData("\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("--\(boundary)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
request.HTTPBody = body
let dataTask = session.dataTaskWithRequest(request) { (data, response, error) -> Void in
if error != nil {
//handle error
}
else {
let outputString : NSString = NSString(data:data!, encoding:NSUTF8StringEncoding)!
print("Response:\(outputString)")
}
}
dataTask.resume()
Another option is the Alamofire lib that offers Chainable Request / Response methods.
https://github.com/Alamofire/Alamofire
Making a Request
import Alamofire
Alamofire.request(.GET, "http://httpbin.org/get")
Response Handling
Alamofire.request(.GET, "http://httpbin.org/get", parameters: ["foo": "bar"])
.response { request, response, data, error in
print(request)
print(response)
print(error)
}
Swift 4 and above : Data Request using URLSession API
// create the url
let url = URL(string: "https://jsonplaceholder.typicode.com/todos/1")! //change the url
// create the session object
let session = URLSession.shared
// now create the URLRequest object using the url object
let request = URLRequest(url: url)
// create dataTask using the session object to send data to the server
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
guard error == nil else {
return
}
guard let data = data else {
return
}
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
print(json)
}
} catch let error {
print(error.localizedDescription)
}
})
task.resume()
Swift 4 and above, Decodable and Result enum
// APIError enum which shows all possible Network errors
enum APIError: Error {
case networkError(Error)
case dataNotFound
case jsonParsingError(Error)
case invalidStatusCode(Int)
case badURL(String)
}
// Result enum to show success or failure
enum Result<T> {
case success(T)
case failure(AppError)
}
// dataRequest which sends request to given URL and convert to Decodable Object
func dataRequest<T: Decodable>(with url: String, objectType: T.Type, completion: #escaping (Result<T>) -> Void) {
// create the url with NSURL
guard let dataURL = URL(string: url) else {
completion(.failure(APIError.badURL(url))
return
}
// create the session object
let session = URLSession.shared
// now create the URLRequest object using the url object
let request = URLRequest(url: dataURL, cachePolicy: .useProtocolCachePolicy, timeoutInterval: 60)
// create dataTask using the session object to send data to the server
let task = session.dataTask(with: request, completionHandler: { data, response, error in
guard error == nil else {
completion(Result.failure(APIError.networkError(error!)))
return
}
guard let data = data else {
completion(Result.failure(AppError.dataNotFound))
return
}
do {
// create decodable object from data
let decodedObject = try JSONDecoder().decode(objectType.self, from: data)
completion(Result.success(decodedObject))
} catch let error {
completion(Result.failure(APIError.jsonParsingError(error as! DecodingError)))
}
})
task.resume()
}
example:
//if we want to fetch todo from placeholder API, then we define the ToDo struct and call dataRequest and pass "https://jsonplaceholder.typicode.com/todos/1" string url.
struct ToDo: Decodable {
let id: Int
let userId: Int
let title: String
let completed: Bool
}
dataRequest(with: "https://jsonplaceholder.typicode.com/todos/1", objectType: ToDo.self) { (result: Result) in
switch result {
case .success(let object):
print(object)
case .failure(let error):
print(error)
}
}
// this prints the result:
ToDo(id: 1, userId: 1, title: "delectus aut autem", completed: false)
Basic Swift 3+ Solution
guard let url = URL(string: "http://www.stackoverflow.com") else { return }
let task = URLSession.shared.dataTask(with: url) { data, response, error in
guard let data = data, error == nil else { return }
print(NSString(data: data, encoding: String.Encoding.utf8.rawValue))
}
task.resume()
Using URLSession + Swift 5
Just adding to cezar's answer, if you want to make web request using Apple's URLSession class, there are multiple way to do the task
Simple GET Request with URL
Simple GET Request with URL and Parameters
Simple GET Request with URL with Error Handlings
Simple POST Request with URL, Parameters with Error Handlings
1. Simple GET Request with URL
func simpleGetUrlRequest()
{
let url = URL(string: "https://httpbin.org/get")!
let task = URLSession.shared.dataTask(with: url) {(data, response, error) in
guard let data = data else { return }
print("The response is : ",String(data: data, encoding: .utf8)!)
//print(NSString(data: data, encoding: String.Encoding.utf8.rawValue) as Any)
}
task.resume()
}
Note : Make sure You must add "NSAppTransportSecurity" key in pList for http requests
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>
2. Simple GET Request with URL and Parameters
func simpleGetUrlWithParamRequest()
{
let url = URL(string: "https://www.google.com/search?q=peace")!
let task = URLSession.shared.dataTask(with: url) {(data, response, error) in
if error != nil || data == nil {
print("Client error!")
return
}
guard let response = response as? HTTPURLResponse, (200...299).contains(response.statusCode) else {
print("Server error!")
return
}
print("The Response is : ",response)
}
task.resume()
}
3. Simple GET Request with URL with Error Handlings
func simpleGetUrlRequestWithErrorHandling()
{
let session = URLSession.shared
let url = URL(string: "https://httpbin.org/get")!
let task = session.dataTask(with: url) { data, response, error in
if error != nil || data == nil {
print("Client error!")
return
}
guard let response = response as? HTTPURLResponse, (200...299).contains(response.statusCode) else {
print("Server error!")
return
}
guard let mime = response.mimeType, mime == "application/json" else {
print("Wrong MIME type!")
return
}
do {
let json = try JSONSerialization.jsonObject(with: data!, options: [])
print("The Response is : ",json)
} catch {
print("JSON error: \(error.localizedDescription)")
}
}
task.resume()
}
4. Simple POST Request with URL, Parameters with Error Handlings.
func simplePostRequestWithParamsAndErrorHandling(){
let configuration = URLSessionConfiguration.default
configuration.timeoutIntervalForRequest = 30
configuration.timeoutIntervalForResource = 30
let session = URLSession(configuration: configuration)
let url = URL(string: "https://httpbin.org/post")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let parameters = ["username": "foo", "password": "123456"]
do {
request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted)
} catch let error {
print(error.localizedDescription)
}
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
if error != nil || data == nil {
print("Client error!")
return
}
guard let response = response as? HTTPURLResponse, (200...299).contains(response.statusCode) else {
print("Oops!! there is server error!")
return
}
guard let mime = response.mimeType, mime == "application/json" else {
print("response is not json")
return
}
do {
let json = try JSONSerialization.jsonObject(with: data!, options: [])
print("The Response is : ",json)
} catch {
print("JSON error: \(error.localizedDescription)")
}
})
task.resume()
}
Your suggestions are appreciated!!
Swift 3.0
Through a small abstraction
https://github.com/daltoniam/swiftHTTP
Example
do {
let opt = try HTTP.GET("https://google.com")
opt.start { response in
if let err = response.error {
print("error: \(err.localizedDescription)")
return //also notify app of failure as needed
}
print("opt finished: \(response.description)")
//print("data is: \(response.data)") access the response of the data with response.data
}
} catch let error {
print("got an error creating the request: \(error)")
}
Details
Xcode 9.2, Swift 4
Xcode 10.2.1 (10E1001), Swift 5
Info.plist
NSAppTransportSecurity
Add to the info plist:
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>
Alamofire Sample
Alamofire
import Alamofire
class AlamofireDataManager {
fileprivate let queue: DispatchQueue
init(queue: DispatchQueue) { self.queue = queue }
private func createError(message: String, code: Int) -> Error {
return NSError(domain: "dataManager", code: code, userInfo: ["message": message ])
}
private func make(session: URLSession = URLSession.shared, request: URLRequest, closure: ((Result<[String: Any]>) -> Void)?) {
Alamofire.request(request).responseJSON { response in
let complete: (Result<[String: Any]>) ->() = { result in DispatchQueue.main.async { closure?(result) } }
switch response.result {
case .success(let value): complete(.success(value as! [String: Any]))
case .failure(let error): complete(.failure(error))
}
}
}
func searchRequest(term: String, closure: ((Result<[String: Any]>) -> Void)?) {
guard let url = URL(string: "https://itunes.apple.com/search?term=\(term.replacingOccurrences(of: " ", with: "+"))") else { return }
let request = URLRequest(url: url)
make(request: request) { response in closure?(response) }
}
}
Usage of Alamofire sample
private lazy var alamofireDataManager = AlamofireDataManager(queue: DispatchQueue(label: "DataManager.queue", qos: .utility))
//.........
alamofireDataManager.searchRequest(term: "jack johnson") { result in
print(result.value ?? "no data")
print(result.error ?? "no error")
}
URLSession Sample
import Foundation
class DataManager {
fileprivate let queue: DispatchQueue
init(queue: DispatchQueue) { self.queue = queue }
private func createError(message: String, code: Int) -> Error {
return NSError(domain: "dataManager", code: code, userInfo: ["message": message ])
}
private func make(session: URLSession = URLSession.shared, request: URLRequest, closure: ((_ json: [String: Any]?, _ error: Error?)->Void)?) {
let task = session.dataTask(with: request) { [weak self] data, response, error in
self?.queue.async {
let complete: (_ json: [String: Any]?, _ error: Error?) ->() = { json, error in DispatchQueue.main.async { closure?(json, error) } }
guard let self = self, error == nil else { complete(nil, error); return }
guard let data = data else { complete(nil, self.createError(message: "No data", code: 999)); return }
do {
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
complete(json, nil)
}
} catch let error { complete(nil, error); return }
}
}
task.resume()
}
func searchRequest(term: String, closure: ((_ json: [String: Any]?, _ error: Error?)->Void)?) {
let url = URL(string: "https://itunes.apple.com/search?term=\(term.replacingOccurrences(of: " ", with: "+"))")
let request = URLRequest(url: url!)
make(request: request) { json, error in closure?(json, error) }
}
}
Usage of URLSession sample
private lazy var dataManager = DataManager(queue: DispatchQueue(label: "DataManager.queue", qos: .utility))
// .......
dataManager.searchRequest(term: "jack johnson") { json, error in
print(error ?? "nil")
print(json ?? "nil")
print("Update views")
}
Results
I have done HTTP Request Both methods GET & POST with JSON Parsing this way:
on viewDidLoad():
override func viewDidLoad() {
super.viewDidLoad()
makeGetRequest()
makePostRequest()
}
func makePostRequest(){
let urlPath: String = "http://www.swiftdeveloperblog.com/http-post-example-script/"
var url: NSURL = NSURL(string: urlPath)!
var request: NSMutableURLRequest = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"
var stringPost="firstName=James&lastName=Bond" // Key and Value
let data = stringPost.dataUsingEncoding(NSUTF8StringEncoding)
request.timeoutInterval = 60
request.HTTPBody=data
request.HTTPShouldHandleCookies=false
let queue:NSOperationQueue = NSOperationQueue()
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) {
// Success
println(jsonResult)
let message = jsonResult["Message"] as! NSString
println(message)
}else {
// Failed
println("Failed")
}
})
}
func makeGetRequest(){
var url : String = "http://api.androidhive.info/contacts/"
var request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: url)
request.HTTPMethod = "GET"
request.timeoutInterval = 60
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) {
// Success
println(jsonResult)
let dataArray = jsonResult["contacts"] as! NSArray;
for item in dataArray { // loop through data items
let obj = item as! NSDictionary
for (key, value) in obj {
println("Key: \(key) - Value: \(value)")
let phone = obj["phone"] as! NSDictionary;
let mobile = phone["mobile"] as! NSString
println(mobile)
let home = phone["home"] as! NSString
println(home)
let office = phone["office"] as! NSString
println(office)
}
}
} else {
// Failed
println("Failed")
}
})
}
Done
You can use Just, a python-requests style HTTP library.
Some example of sending HTTP request with Just:
// synchronous GET request with URL query a=1
let r = Just.get("https://httpbin.org/get", params:["a":1])
// asynchronous POST request with form value and file uploads
Just.post(
"http://justiceleauge.org/member/register",
data: ["username": "barryallen", "password":"ReverseF1ashSucks"],
files: ["profile_photo": .URL(fileURLWithPath:"flash.jpeg", nil)]
) { (r)
if (r.ok) { /* success! */ }
}
In both cases, the result of a request r can be accessed in ways similar to python-request:
r.ok // is the response successful?
r.statusCode // status code of response
r.content // response body as NSData?
r.text // response body as text?
r.json // response body parsed by NSJSONSerielization
You can find more examples in this playground
Using this library in synchronous mode in a playground is the closest thing to cURL one can get in Swift.
I am calling the json on login button click
#IBAction func loginClicked(sender : AnyObject) {
var request = NSMutableURLRequest(URL: NSURL(string: kLoginURL)) // Here, kLogin contains the Login API.
var session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
var err: NSError?
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(self.criteriaDic(), options: nil, error: &err) // This Line fills the web service with required parameters.
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
var strData = NSString(data: data, encoding: NSUTF8StringEncoding)
var err1: NSError?
var json2 = NSJSONSerialization.JSONObjectWithData(strData.dataUsingEncoding(NSUTF8StringEncoding), options: .MutableLeaves, error:&err1 ) as NSDictionary
println("json2 :\(json2)")
if(err) {
println(err!.localizedDescription)
}
else {
var success = json2["success"] as? Int
println("Success: \(success)")
}
})
task.resume()
}
Here, I have made a seperate dictionary for the parameters.
var params = ["format":"json", "MobileType":"IOS","MIN":"f8d16d98ad12acdbbe1de647414495ec","UserName":emailTxtField.text,"PWD":passwordTxtField.text,"SigninVia":"SH"]as NSDictionary
return params
}
// You can add your own sets of parameter here.
KISS answer:
URLSession.shared.dataTask(with: URL(string: "https://google.com")!) {(data, response, error) in
print(String(data: data!, encoding: .utf8))
}.resume()
In Swift 4.1 and Xcode 9.4.1.
JSON POST approach example. To check internet connection add Reachability.h & .m files from https://developer.apple.com/library/archive/samplecode/Reachability/Introduction/Intro.html#//apple_ref/doc/uid/DTS40007324-Intro-DontLinkElementID_2
func yourFunctionName {
//Check internet connection
let networkReachability = Reachability.forInternetConnection()
let networkStatus:Int = (networkReachability?.currentReachabilityStatus())!.rawValue
print(networkStatus)
if networkStatus == NotReachable.rawValue {
let msg = SharedClass.sharedInstance.noNetMsg//Message
//Call alert from shared class
SharedClass.sharedInstance.alert(view: self, title: "", message: msg)
} else {
//Call spinner from shared class
SharedClass.sharedInstance.activityIndicator(view: self.view)//Play spinner
let parameters = "Your parameters here"
var request = URLRequest(url: URL(string: url)!)
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.httpMethod = "POST"
print("URL : \(request)")
request.httpBody = parameters.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in guard let data = data, error == nil else { // check for fundamental networking error
//Stop spinner
SharedClass.sharedInstance.stopActivityIndicator() //Stop spinner
//Print error in alert
SharedClass.sharedInstance.alert(view: self, title: "", message: "\(String(describing: error!.localizedDescription))")
return
}
SharedClass.sharedInstance.stopActivityIndicator() //Stop spinner
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(String(describing: response))")
}
do {
let response = try JSONSerialization.jsonObject(with: data, options: []) as? [String: AnyObject]
print(response!)
//Your code here
} catch let error as NSError {
print(error)
}
}
task.resume()
}
}
If you have interest to use this function in SharedClass
//My shared class
import UIKit
class SharedClass: NSObject {
static let sharedInstance = SharedClass()
func postRequestFunction(apiName: String , parameters: String, onCompletion: #escaping (_ success: Bool, _ error: Error?, _ result: [String: Any]?)->()) {
var URL = "your URL here/index.php/***?"
URL = URL.replacingOccurrences(of: "***", with: apiName)
var request = URLRequest(url: URL(string: URL)!)
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.httpMethod = "POST"
print("shared URL : \(request)")
request.httpBody = parameters.data(using: .utf8)
var returnRes:[String:Any] = [:]
let task = URLSession.shared.dataTask(with: request) { data, response, error in
if let error = error {
onCompletion(false, error, nil)
} else {
guard let data = data else {
onCompletion(false, error, nil)
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode == 200 {
do {
returnRes = try JSONSerialization.jsonObject(with: data, options: []) as! [String : Any]
onCompletion(true, nil, returnRes)
} catch let error as NSError {
onCompletion(false, error, nil)
}
} else {
onCompletion(false, error, nil)
}
}
}
task.resume()
}
private override init() {
}
And finally call this function like this....
SharedClass.sharedInstance.postRequestFunction(apiName: "Your API name", parameters: parameters) { (success, error, result) in
print(result!)
if success {
//Your code here
} else {
print(error?.localizedDescription ?? "")
}
}
Here are start to finish instructions to make an HTTP request with Swift on Linux.
First create a SwiftPM package
mkdir swift-http && cd swift-http && swift package init --type executable
Then replace the contents of ./Sources/swift-http/main.swift
with the code below:
import Foundation
import FoundationNetworking
let sema = DispatchSemaphore(value: 0)
URLSession.shared.dataTask(with: URL(string: "http://numbersapi.com/42")!) {(data, response, error) in
print(String(data: data!, encoding: .utf8) ?? String(describing: error))
sema.signal()
}.resume()
sema.wait()
Then run the code
swift run
Output example:
[6/6] Build complete!
42 is the answer to the Ultimate Question of Life, the Universe, and Everything.
Note: the DispatchSemaphore is used so that our program doesn't exit before getting a response.
You could have also done something like this:
import Foundation
import FoundationNetworking
var done = false
URLSession.shared.dataTask(with: URL(string: "http://numbersapi.com/42")!) {(data, response, error) in
print(String(data: data!, encoding: .utf8) ?? String(describing: error))
done = true
}.resume()
while !done { Thread.sleep(forTimeInterval: 1) }
A simple Swift 2.0 approach to making a HTTP GET request
The HTTP request is asynchronous so you need a way to get the returned value from the HTTP Request. This approach uses Notifiers and is spread over two classes.
The example is to check the username and password for an identifier token using the website http://www.example.com/handler.php?do=CheckUserJson&json= That is the file is called handler.php and has a switch statement on the do parameter to get a RESTful approach.
In the viewDidLoad we setup the NotifierObserver, set up the json and make the call to the getHTTPRequest function. It will return to the function checkedUsernameAndPassword with the returned parameter from the http request.
override func viewDidLoad() {
super.viewDidLoad()
// setup the Notification observer to catch the result of check username and password
NSNotificationCenter.defaultCenter().addObserver(self, selector: "checkedUsernameAndPassword:", name: CHECK_USERNAME_AND_PASSWORD, object: nil)
let username = GlobalVariables.USER_NAME
let password = GlobalVariables.PASSWORD
// check username and password
if let jsonString = Utility.checkUsernameAndPasswordJson(username, password:password){
print("json string returned = \(jsonString)")
let url = CHECKUSERJSON+jsonString
// CHECKUSERJSON = http://www.example.com/handler.php?do=CheckUserJson&json=
// jsonString = {\"username\":\"demo\",\"password\":\"demo\"}"
// the php script handles a json request and returns a string identifier
Utility.getHTTPRequest(url,notifierId: CHECK_USERNAME_AND_PASSWORD)
// the returned identifier is sent to the checkedUsernaeAndPassword function when it becomes availabel.
}
}
There are two static functions in Utility.swift first to encode the json and then to do the HTTP call.
static func checkUsernameAndPasswordJson(username: String, password: String) -> String?{
let para:NSMutableDictionary = NSMutableDictionary()
para.setValue("demo", forKey: "username")
para.setValue("demo", forKey: "password")
let jsonData: NSData
do{
jsonData = try NSJSONSerialization.dataWithJSONObject(para, options: NSJSONWritingOptions())
let jsonString = NSString(data: jsonData, encoding: NSUTF8StringEncoding) as! String
return jsonString
} catch _ {
print ("UH OOO")
return nil
}
}
and the Http request
static func getHTTPRequest (url:String , notifierId: String) -> Void{
let urlString = url
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config, delegate: nil, delegateQueue: nil)
let safeURL = urlString.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
if let url = NSURL(string: safeURL){
let request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "GET"
request.timeoutInterval = 60
let taskData = session.dataTaskWithRequest(request, completionHandler: {
(data:NSData?, response:NSURLResponse?, error:NSError?) -> Void in
if (data != nil) {
let result = NSString(data: data! , encoding: NSUTF8StringEncoding)
sendNotification (notifierId, message: String(result), num: 0)
}else{
sendNotification (notifierId, message: String(UTF8String: nil), num: -1) }
})
taskData.resume()
}else{
print("bad urlString = \(urlString)")
}
}
The sendNotification function completes the circle. Notice that in teh Observer there is a ":" at the end of the selector string. This allows the notification to carry a payload in userInfo. I give this a String and an Int.
static func sendNotification (key: String, message:String?, num: Int?){
NSNotificationCenter.defaultCenter().postNotificationName(
key,
object: nil,
userInfo: (["message": message!,
"num": "\(num!)"])
)
}
Note that using HTTP is oldFashioned, prefer HTTPS see How do I load an HTTP URL with App Transport Security enabled in iOS 9?
Update :- Xcode 13.0 & Swift 5+
GET HTTP REQUEST
let url = URL(string: "URL HERE")! //PUT Your URL
var request = URLRequest(url: url)
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let safeData = data,
let response = response as? HTTPURLResponse,
error == nil else { // check for fundamental networking error
print("error", error ?? "Unknown error")
delegate?.onError(error!)
return
}
guard (200 ... 299) ~= response.statusCode else { // check for http errors
print("statusCode should be 2xx, but is \(response.statusCode)")
print("response = \(response)")
return
}
let responseString = String(data: safeData, encoding: .utf8)
print("Response String = \(responseString)")
}
task.resume()
var post:NSString = "api=myposts&userid=\(uid)&page_no=0&limit_no=10"
NSLog("PostData: %#",post);
var url1:NSURL = NSURL(string: url)!
var postData:NSData = post.dataUsingEncoding(NSASCIIStringEncoding)!
var postLength:NSString = String( postData.length )
var request:NSMutableURLRequest = NSMutableURLRequest(URL: url1)
request.HTTPMethod = "POST"
request.HTTPBody = postData
request.setValue(postLength, forHTTPHeaderField: "Content-Length")
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("application/json", forHTTPHeaderField: "Accept")
var reponseError: NSError?
var response: NSURLResponse?
var urlData: NSData? = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&reponseError)
if ( urlData != nil ) {
let res = response as NSHTTPURLResponse!;
NSLog("Response code: %ld", res.statusCode);
if (res.statusCode >= 200 && res.statusCode < 300)
{
var responseData:NSString = NSString(data:urlData!, encoding:NSUTF8StringEncoding)!
NSLog("Response ==> %#", responseData);
var error: NSError?
let jsonData:NSDictionary = NSJSONSerialization.JSONObjectWithData(urlData!, options:NSJSONReadingOptions.MutableContainers , error: &error) as NSDictionary
let success:NSInteger = jsonData.valueForKey("error") as NSInteger
//[jsonData[#"success"] integerValue];
NSLog("Success: %ld", success);
if(success == 0)
{
NSLog("Login SUCCESS");
self.dataArr = jsonData.valueForKey("data") as NSMutableArray
self.table.reloadData()
} else {
NSLog("Login failed1");
ZAActivityBar.showErrorWithStatus("error", forAction: "Action2")
}
} else {
NSLog("Login failed2");
ZAActivityBar.showErrorWithStatus("error", forAction: "Action2")
}
} else {
NSLog("Login failed3");
ZAActivityBar.showErrorWithStatus("error", forAction: "Action2")
}
it will help you surely
//Here is an example that worked for me
//Swift function that post a request to a server with key values
func insertRecords()
{
let usrID = txtID.text
let checkin = lblInOut.text
let comment = txtComment.text
// The address of the web service
let urlString = "http://your_url/checkInOut_post.php"
// These are the keys that your are sending as part of the post request
let keyValues = "id=\(usrID)&inout=\(checkin)&comment=\(comment)"
// 1 - Create the session by getting the configuration and then
// creating the session
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config, delegate: nil, delegateQueue: nil)
// 2 - Create the URL Object
if let url = NSURL(string: urlString){
// 3 - Create the Request Object
var request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"
// set the key values
request.HTTPBody = keyValues.dataUsingEncoding(NSUTF8StringEncoding);
// 4 - execute the request
let taskData = session.dataTaskWithRequest(request, completionHandler: {
(data:NSData!, response:NSURLResponse!, error:NSError!) -> Void in
println("\(data)")
// 5 - Do something with the Data back
if (data != nil) {
// we got some data back
println("\(data)")
let result = NSString(data: data , encoding: NSUTF8StringEncoding)
println("\(result)")
if result == "OK" {
let a = UIAlertView(title: "OK", message: "Attendece has been recorded", delegate: nil, cancelButtonTitle: "OK")
println("\(result)")
dispatch_async(dispatch_get_main_queue()) {
a.show()
}
} else {
// display error and do something else
}
} else
{ // we got an error
println("Error getting stores :\(error.localizedDescription)")
}
})
taskData.resume()
}
}
PHP Code to get the key values
$empID = $_POST['id'];
$inOut = $_POST['inout'];
$comment = $_POST['comment'];
Here's a very simple Swift 4 example in a playground:
import UIKit
// run asynchronously in a playground
import PlaygroundSupport
PlaygroundPage.current.needsIndefiniteExecution = true
// create a url
let url = URL(string: "http://www.stackoverflow.com")
// create a data task
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error != nil {
print("there's a problem")
}
print(String(data: data!, encoding: String.Encoding.utf8) ?? "")
}
//running the task w/ resume
task.resume()
For XCUITest to stop the test finishing before the async request completes use this (maybe reduce the 100 timeout):
func test_api() {
let url = URL(string: "https://jsonplaceholder.typicode.com/posts/42")!
let exp = expectation(description: "Waiting for data")
let task = URLSession.shared.dataTask(with: url) {(data, response, error) in
guard let data = data else { return }
print(String(data: data, encoding: .utf8)!)
exp.fulfill()
}
task.resume()
XCTWaiter.wait(for: [exp], timeout: 100)
}
An example for a sample "GET" request is given below.
let urlString = "YOUR_GET_URL"
let yourURL = URL(string: urlstring)
let dataTask = URLSession.shared.dataTask(with: yourURL) { (data, response, error) in
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers)
print("json --- \(json)")
}catch let err {
print("err---\(err.localizedDescription)")
}
}
dataTask.resume()