@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        
        Guppy.registerURLProtocol()
        
        return true
    }
}

class Session: URLSession {
    
    init() {
        let configuration = URLSessionConfiguration.default
        
        configuration.urlCache = nil
        
        // Protocols are evaluated in reverse order
        // If GuppyURLProtocol is not the last protocol it is not guaranteed to be executed
        configuration.protocolClasses = [MyCustomProtocol, GuppyURLProtocol.self]
        
        super.init(configuration: configuration)
    }
}

class SessionManager: Alamofire.SessionManager {

    init() {
        let configuration = URLSessionConfiguration.default

        configuration.urlCache = nil
        configuration.protocolClasses = [GuppyURLProtocol.self]
        
        super.init(configuration: configuration)
    }
}