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(Swift 3,4,5...) Async Accept Socket ConnectionDemonstrates how to get the connected client socket after accepting a connection asynchronously.
func chilkatTest() { // This example assumes the Chilkat Socket API to have been previously unlocked. // See Socket Unlock Sample for sample code. let listenSocket = CkoSocket()! // Bind to a port and listen. // This example will listen at port 5555 and allows for a backlog // of 25 pending connection requests. var success: Bool = listenSocket.bindAndListen(5555, backlog: 25) if success != true { print("\(listenSocket.lastErrorText!)") return } // Start a background task to accept an incoming connection ... var maxWaitMs: Int = 20000 var acceptTask: CkoTask? = listenSocket.acceptNextConnectionAsync(maxWaitMs) acceptTask!.run() // ... // ... // ... // Imagine at this point the task has completed successfully, // and a connection was accepted. Here's how to get the connected socket... let connectedClient = CkoSocket()! success = connectedClient.loadTaskResult(acceptTask) // Here's how it works: The AcceptNextConnection method would normally // return a socket object when called synchronously. When called asynchronously, // it cannot do so because it returns the task object. When the async method // (running in a background thread) completes, the socket object that is the client // connection is contained within the task object. // // This can be generalized for any case where a Chilkat method returns an object. // The async version of that method is such that the object returned in the background // thread is contained within the task object. // To get the result object, we create a new object instance of that type. // In this case, we create a socket object (connectedClient). There is a LoadTaskResult // method in all Chilkat classes that can be a return value of an async method call. // The LoadTaskResult method transfers the returned object from the task to the caller. } |
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