A simple network request using NSURLSession

simplenetwork.swift

import UIKit
import XCPlayground

var str = "Hello, playground"

XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

let config = NSURLSessionConfiguration.defaultSessionConfiguration()
config.HTTPAdditionalHeaders = ["foo": "bar"]

let session = NSURLSession(configuration: config)

let url = NSURL(string: "http://www.google.com/")!

let task = session.dataTaskWithURL(url) { data, response, error in
    if let data = data {
        let string = NSString(data: data, encoding: NSASCIIStringEncoding)
        print("Hello \(data) \(string)")
    }

}

task.resume()