Upload some dummy data with URLSession.dataTask

URLSession.dataTask used when Uploading.swift

import UIKit

// get some dummy json
let json = "{'name' : 'john snow'; 'age' : '29'}"

// get a reference to upload server
let url = URL(string: "https://httpbin.org/post")!

var request = URLRequest(url: url)

// you need to specify the http method in your request body and attach the data you need to send
request.httpMethod = "POST"

// convert your dummy json into Data
request.httpBody = json.data(using: .utf8)

// have your configuration ready
let defaultConfiguration = URLSessionConfiguration.default
defaultConfiguration.allowsCellularAccess = true
defaultConfiguration.waitsForConnectivity = true

// pass your configuration to your session
let session = URLSession(configuration: defaultConfiguration)


let task = session.dataTask(with: request) { (data, response, error) in
    
    guard error == nil else { return }
    
   
    guard let serverResponse = response as? HTTPURLResponse,
        serverResponse.statusCode == 200 else { print("Unexpected status code"); return }
    guard let receivedData = data else { return }
    
    if let stringData = String(data: receivedData, encoding: .utf8) {
        print("Server returned: \(stringData)")
    }
}
// all tasks are initiated in 'suspended' mode; remember to start the task
task.resume()