(Swift 3,4,5...) TCP/IP Socket Connect to Remote Host:Port

Demonstrates how to create a TCP/IP socket, connect to a remote host:port, and receive a "Hello World!" message.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let socket = CkoSocket()!

    // Connect to port 5555 of localhost.
    // The string "localhost" is for testing on a single computer.
    // It would typically be replaced with an IP hostname, such
    // as "www.chilkatsoft.com".
    var ssl: Bool = false
    var maxWaitMillisec: Int = 20000
    var success: Bool = socket.connect("localhost", port: 5555, ssl: ssl, maxWaitMs: maxWaitMillisec)
    if success != true {
        print("\(socket.lastErrorText!)")
        return
    }

    // Set maximum timeouts for reading an writing (in millisec)
    socket.maxReadIdleMs = 10000
    socket.maxSendIdleMs = 10000

    // Pretend, for the sake of the example, that the
    // ficticious server is going to send a "Hello World!" 
    // after accepting the connection.  
    // Note: Technically, the ReceiveString may not receive the
    // complete string, although it's highly probable given the short
    // length of the "Hello World!" message. 
    // See this Chilkat blog post for more information:
    // http://www.cknotes.com/?p=302
    var receivedMsg: String? = socket.receiveString()
    if socket.lastMethodSuccess != true {
        print("\(socket.lastErrorText!)")
        return
    }

    // Close the connection with the server
    // Wait a max of 20 seconds (20000 millsec)
    success = socket.close(20000)

    print("\(receivedMsg!)")

}