CODEWITHSUNDEEP
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Nick Pitoniak
Nick Pitoniak

Reputation: 31

Swift: NSURL properly returning HTML from URL in Playground but crashes simulator when used in an app

I am using NSURL to get the HTML of a website which works great in the Playground, but crashes the simulator when I use it in an app. Playground Code:

import Foundation
import XCPlayground

// Let asynchronous code run
XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

let myUrl = NSURL(string: "http://www.google.com")
let request = NSMutableURLRequest(URL: myUrl!)
request.HTTPMethod = "POST"
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
  data, response, error in
  let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
  if error != nil {
    print("Error: \(error)")
  }
  print("Response: \(response)")
  print("Response String: \(responseString)")
}
task.resume()

App Code:

import UIKit
import Foundation

class ViewController: UIViewController {

    @IBOutlet weak var testLabel: UILabel!

    @IBAction func testButton(sender: UIButton) {
        let myUrl = NSURL(string: "http://www.google.com")
        let request = NSMutableURLRequest(URL: myUrl!)
        request.HTTPMethod = "POST"
        let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
            data, response, error in
            let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
            self.testLabel.text = "\(responseString)"
            if error != nil {
                print("Error: \(error)")
            }
        }
        task.resume()
    }

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

}

Error upon crash:
2015-10-27 20:14:54.105 testProject[51314:431730] App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file. fatal error: unexpectedly found nil while unwrapping an Optional value (lldb)

Thanks,
Nick

Upvotes: 0

Views: 261

Answers (1)

Andriy Gordiychuk
Andriy Gordiychuk

Reputation: 6272

I have used the code below:

class ViewController: UIViewController {

    @IBOutlet weak var testLabel: UILabel!

    @IBAction func testButton(sender: UIButton) {
        let myUrl = NSURL(string: "http://www.google.com")
        let request = NSMutableURLRequest(URL: myUrl!)
        request.HTTPMethod = "POST"
        let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
            data, response, error in
            print("hey \(data)")
            let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
            self.testLabel.text = "\(responseString)"
            if error != nil {
                print("Error: \(error)")
            }
        }
        task.resume()
    }

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

}

And in my console the following is printed:

2015-10-28 02:54:49.284 trial[58972:2551861] App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file.
hey nil
fatal error: unexpectedly found nil while unwrapping an Optional value
(lldb)

As you can see data is nil. It might be related to the fact that http is blocked due to App Transport Security.

Upvotes: 0

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