Swift

TCP Socket Send Byte and Receive Byte

Demonstrates the Chilkat Socket ReceiveByte and SendByte method. Swift

func chilkatTest() {
    var success: Bool = false

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

    let sock = CkoSocket()!

    // --------------------------------------------------------------------
    // This example uses the public TCP echo service at https://tcpbin.com/
    // --------------------------------------------------------------------

    var useTls: Bool = false
    var port: Int = 4242
    var maxWaitMs: Int = 5000
    success = sock.connect(hostname: "tcpbin.com", port: port, ssl: useTls, maxWaitMs: maxWaitMs)
    if success == false {
        print("\(sock.lastErrorText!)")
        return
    }

    // Wait a max of 2 seconds for a response..
    sock.maxReadIdleMs = 2000

    // Send a byte.
    sock.sendByte(value: 96)

    // The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
    sock.sendByte(value: 10)

    // The echo server will echo back whatever is sent to it.
    // We should be able to read the same byte back..
    // After successfully reading, the byte value is available in the ReceivedInt property.
    var treatAsUnsignedInt: Bool = true
    success = sock.receiveByte(bUnsigned: treatAsUnsignedInt)
    if success == false {
        print("\(sock.lastErrorText!)")
        return
    }

    // Let's look at the value of the byte received.  It should be 96.
    print("\(sock.receivedInt.intValue)")

    // The echo server also echoed the LF back.
    success = sock.receiveByte(bUnsigned: treatAsUnsignedInt)
    // Assuming success..

    // Should be decimal 10.
    print("\(sock.receivedInt.intValue)")

}