LukeSmith16

let config = URLSessionConfiguration.default

// Wait a total of 120 seconds before giving up starting from when there's an interval of no response data received from the server.
config.timeoutIntervalForRequest = 120 // Default is 60

// Wait a total of 360 seconds before giving up starting from when we start a request.
config.timeoutIntervalForResource = 360 // Default is 7 days

LukeSmith16

let task = URLSession.shared.dataTask(with: request)

// Let our server know, it should prioritise handling this above lower priority tasks.
task.priority = URLSessionTask.highPriority 

task.resume()

LukeSmith16

func downloadHighResImage() {
    var request = URLRequest(url: URL(string: "highQualityImageURL")!)

    // Trigger error in `session.dataTask` if user has low data mode enabled.
    request.allowsConstrainedNetworkAccess = false

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

        if let error = error as? URLError,
           error.networkUnavailableReason == .constrained {

LukeSmith16

func expensiveLongRunningDataTask() {
    let config = URLSessionConfiguration.default

    // Be low data mode compliant
    config.allowsConstrainedNetworkAccess = false

    // Automatically retrigger the request when we are on Wi-Fi.
    config.waitsForConnectivity = true

    let request = URLRequest(url: myURL)

LukeSmith16

private lazy var backgroundSession: URLSession = {
    let config = URLSessionConfiguration.background(withIdentifier: "LongRunningSession")
    
    // System will trigger requests at the best time for optimal performance.
    config.isDiscretionary = true

    return URLSession(configuration: config, delegate: self, delegateQueue: nil)
}()

LukeSmith16

// Low priority request
var prefetchRequest = URLRequest(url: URL(string: "https://www.apple.com")!)
prefetchRequest.networkServiceType = .background

// High priority request
var checkoutRequest = URLRequest(url: URL(string: "https://www.apple.com")!)
checkoutRequest.networkServiceType = .responsiveData

LukeSmith16

let config = URLSessionConfiguration.default

// You can explore the other types to set on Apple's documentation
config.multipathServiceType = .handover

LukeSmith16

var request = URLRequest(url: myURL))

// If our server supports HTTP/3.0, we can enable this to speed up the discovery process; allowing our stack to assume we have a HTTP/3.0 compliant server.
request.assumesHTTP3Capable = true

LukeSmith16

public struct UITestConnectionManager {

    public static func setMockedResponse(with response: MockResponse) {
        UITestConnectionHandler.setAllowedResponse(with: response)
    }

    public static func register() {
        URLProtocol.registerClass(UITestConnectionHandler.self)
    }

LukeSmith16

final class MyAppUITests: XCTestCase {

    override func setUpWithError() throws {
        continueAfterFailure = false
    }

    func testShoppingList() {
        UITestConnectionManager.setMockedResponse(with: .list)

        let app = XCUIApplication()