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Swift 3,4,5... Examples

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(Swift 3,4,5...) Async Accept Socket Connection

Demonstrates how to get the connected client socket after accepting a connection asynchronously.

Chilkat Downloads for the Swift Programming Language

MAC OS X (Cocoa) Objective-C/Swift Libs

iOS Objective-C/Swift Libs

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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