How To Check Response.statusCode in sendSynchronousRequest on Swift

Question

How To check response.statusCode in SendSynchronousRequest in Swift The Code is Below :

let urlPath: String = "URL_IS_HERE"
var url: NSURL = NSURL(string: urlPath)
var request: NSURLRequest = NSURLRequest(URL: url)
var response: AutoreleasingUnsafeMutablePointer<NSURLResponse?> = nil

var error: NSErrorPointer? = nil
var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: response, error: nil) as NSData?

before and in objective c , we check response.statusCode With this : (long)response.statusCode but in swift i have no idea how can check response status Code

score 96 · Accepted Answer · edited Apr 14 '18 at 10:03

96

you pass in a reference to response so it is filled THEN you check the result and cast it to a HTTPResponse as only http responses declare the status code property.

let urlPath: String = "http://www.google.de"
var url: NSURL = NSURL(string: urlPath)
var request: NSURLRequest = NSURLRequest(URL: url)
var response: NSURLResponse?

var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData?

if let httpResponse = response as? NSHTTPURLResponse {
    println("error \(httpResponse.statusCode)")
}

note: in objC you would also use the same approach but if you use squared brackets, the compiler doesn't enforce the cast. Swift (being type safe) does enforce the cast always

edited Apr 14 '18 at 10:03

pacification

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answered Oct 04 '14 at 09:58

Daij-Djan

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You can combine/simplify the `if` and `let` statements to `if let httpResponse = response as? NSHTTPURLResponse { ... }`. – Martin R Oct 04 '14 at 10:02
yip right Im not that used to the if let construct but it is cleaner! -- edited – Daij-Djan Oct 04 '14 at 10:04
All types in your answer that begin with NS have now dropped the NS. NSHTTPURLResponse -> HTTPURLResponse This is a note for future programmers. – GranolaGuy Feb 14 '19 at 20:03

score 74 · Answer 2 · edited Apr 14 '18 at 10:03

74

Swift 3 version for @GarySabo answer:

let url = URL(string: "https://apple.com")!
let request = URLRequest(url: url)

let task = URLSession.shared().dataTask(with: request) {data, response, error in

    if let httpResponse = response as? HTTPURLResponse {
        print("statusCode: \(httpResponse.statusCode)")
    }

}
task.resume()

edited Apr 14 '18 at 10:03

pacification

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answered Jun 16 '16 at 10:50

DazChong

3,306
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score 16 · Answer 3 · answered Aug 26 '17 at 13:55

Swift 3+

let dataURL = "https://myurl.com"
        var request = URLRequest(url: URL(string: dataURL)!)
        request.addValue("Bearer \(myToken)", forHTTPHeaderField: "Authorization")
        URLSession.shared.dataTask(with: request) { (data, response, error) in
            // Check if the response has an error
            if error != nil{
                print("Error \(String(describing: error))")
                return
            }

            if let httpResponse = response as? HTTPURLResponse{
                if httpResponse.statusCode == 401{
                    print("Refresh token...")
                    return
                }
            }

            // Get data success

        }.resume()

score 13 · Answer 4 · answered Aug 10 '17 at 23:01

13

I use an extension to URLResponse to simplify this one (Swift 3):

extension URLResponse {

    func getStatusCode() -> Int? {
        if let httpResponse = self as? HTTPURLResponse {
            return httpResponse.statusCode
        }
        return nil
    }
}

answered Aug 10 '17 at 23:01

eskimwier

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15

And how do you use it? An example would have been nice – winklerrr Apr 05 '18 at 23:03
usage: `if let statusCode = urlResponse.getStatusCode() { /*...*/ }` – eskimwier Apr 06 '18 at 15:35

score 9 · Answer 5 · answered Jan 01 '16 at 04:57

Cleaned up for Swift 2.0 using NSURLSession

let urlPath: String = "http://www.google.de"
let url: NSURL = NSURL(string: urlPath)!
let request: NSURLRequest = NSURLRequest(URL: url)
var response: NSURLResponse?


let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request) {urlData, response, reponseError in

         if let httpResponse = response as? NSHTTPURLResponse {
             print("error \(httpResponse.statusCode)")  
          }

 }
 task.resume()
 //You should not write any code after `task.resume()`

score 8 · Answer 6 · answered Aug 31 '19 at 08:22

Create extension to check valid/invalid response -

extension HTTPURLResponse {
     func isResponseOK() -> Bool {
      return (200...299).contains(self.statusCode)
     }
}

Get response from request -

let task = URLSession.shared.dataTask(with: request) { (jsonData, response, error) in

                // post result on main thread
                DispatchQueue.main.async {

                    if let response = response as? HTTPURLResponse, response.isResponseOK() {
                        // assume if we don't receive any error then its successful
                        handler(true)
                    } else {
                        handler(false)
                    }
                }

            }
            task.resume()
        }

score 2 · Answer 7 · answered Jun 06 '15 at 00:51

2

If you use the Just library it'd be as simple as:

Just.get("URL_IS_HERE").statusCode

answered Jun 06 '15 at 00:51

Daniel Duan

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How To Check Response.statusCode in sendSynchronousRequest on Swift

7 Answers7