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I think I finally found a workable solution. I kept searching and found some code that uses semaphores and incorporated it into my original function and it seems to work. func doHttpCall(st : String) -> String { var xmlStr = "" let url = URL(string: st)! let semaphore = DispatchSemaphore(value: 0) let task = URLSession.shared.dataTask(with: url, completionHandler: {(data, response, error) in if let error = error { print("Error: \(error)") } else if let response = response as? HTTPURLResponse, 300..<600 ~= response.statusCode { print("Error: \(response.statusCode)") } else { let mydata = data! xmlStr = String(data: mydata, encoding: .utf8)! print(xmlStr) } semaphore.signal() }) task.resume() _ = semaphore.wait(timeout: DispatchTime.distantFuture) return xmlStr } And I even understand what it's doing. If you have a better solution, I'll always be happy to see it. But sending an http request and getting a response is just an incidental but necessary part of my little app. It only took me a week to find a solution. Thanks again for your trouble.

Thanks for the reply. I had thought that parsing the xml would be hard part but it turned out to be the easiest part of this little app so far. By contrast, I've spent days just trying to figure out how to do what I thought would be a simple http request. I just can't find sample code to do what I want to do. I know that the problem is the network reply is coming back after the function returns, I just don't know how to tell it to wait. Based on your reply I've now come up with this: func doHttpCall(st : String) async -> String { var xmlData = "" let url = URL(string: st)! let urlRequest = URLRequest(url: url) do { let (data, _) = try await URLSession.shared.data(for: urlRequest) xmlData = String(data: data, encoding: .utf8)! print(xmlData) } catch { print("error") } return xmlData } That gives me the error: 'async' call in a function that does not support concurrency. Is there any chance you could point me to some sample code or app that does what I want? I find I learn best from seeing sample code rather that trying to read the documentation. Thanks again.