A Vapor route with async code

vapor-sending.swift

// home route
app.get("/") { request in
    
    // manual send test
    NSLog("starting sending test on a serial queue ...")
    var queue: DispatchQueue?
    let uuid = NSUUID().uuidString
    let queueLabel = "swiftybeaver-queue-" + uuid
    queue = DispatchQueue(label: queueLabel, target: queue)
    NSLog("using dispatch queue \(queueLabel)")
    
    let url = URL(string: "https://api.swiftybeaver.com/ping")!
    
    let operationQueue = OperationQueue()
    operationQueue.underlyingQueue = queue
    NSLog("setup operation queue")
    
    let session = URLSession(configuration: URLSessionConfiguration.default, delegate: nil, delegateQueue: operationQueue)
    NSLog("URL session is using operation queue")
    
    print("sending to \(url) ...")
    
    session.dataTask(with: url) { (data, response, error) in
        NSLog("received response") // NEVER CALLED!
    }.resume()

    return "welcome" // executed before callback
}