(Swift) WebSocket Connect through SOCKS Proxy

This example shows how to establish a WebSocket connection through a SOCKS proxy.

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

    //  --------------------------------------------------
    //  This example borrows the code from the REST using SOCKS Proxy example.
    //  We first use the Chilkat Socket object to establish a connection to the WebSocket server through a SOCKS proxy.
    //  Next, the Rest object uses the Socket object for its connection.
    //  Finally, the WebSocket object uses the Rest object for its connection.
    // 

    let rest = CkoRest()
    let socket = CkoSocket()

    //  Set the SOCKS proxy domain or IP address, port, and SOCKS version number (4 or 5)
    socket.SocksHostname = "192.168.1.79"
    socket.HttpProxyPort = 1080
    socket.SocksVersion = 5

    //  Provide authentication to the SOCKS proxy, if needed.
    socket.SocksUsername = "SOCKS_PROXY_LOGIN"
    socket.SocksPassword = "SOCKS_PROXY_PASSWORD"

    //  Connect to the websocket server through the HTTP proxy.
    var bTls: Bool = false
    var port: Int = 80
    var maxWaitMs: Int = 5000
    var success: Bool = socket.Connect("some-websocket-server.com", port: port, ssl: bTls, maxWaitMs: maxWaitMs)
    if success != true {
        print("Connect Failure Error Code: \(socket.ConnectFailReason.integerValue)")
        print("\(socket.LastErrorText)")
        return
    }

    //  Tell the Rest object to use the connected socket.
    success = rest.UseConnection(socket, autoReconnect: true)
    if success != true {
        print("\(rest.LastErrorText)")
        return
    }

    let ws = CkoWebSocket()

    //  Tell the WebSocket to use this connection.
    success = ws.UseConnection(rest)
    if success != true {
        print("\(ws.LastErrorText)")
        return
    }

    //  Add the standard WebSocket open handshake headers that will be needed.
    //  (This adds the required HTTP request headers to the rest object.)
    ws.AddClientHeaders()

    //  Add any additional headers that might be desired.
    //  Two common WebSocketSpecific headers are "Sec-WebSocket-Protocol" and "Origin".
    rest.AddHeader("Sec-WebSocket-Protocol", value: "x-some-websocket-subprotocol")
    rest.AddHeader("Origin", value: "http://some-websocket-server.com")

    //  Do the open handshake.
    var responseBody: String? = rest.FullRequestNoBody("GET", uriPath: "/something")
    if rest.LastMethodSuccess != true {
        print("\(rest.LastErrorText)")
        return
    }

    //  If successful, the HTTP response status code should be 101,
    //  and the response body will be empty. (If it failed, we'll have a look
    //  at the response body..)
    var statusCode: Int = rest.ResponseStatusCode.integerValue
    print("Response status code: \(statusCode)")

    if statusCode != 101 {
        print("\(responseBody!)")
        print("-- Failed because of unexpected response status code.")
        return
    }

    //  We have the expected 101 response, so let's now validate the
    //  contents of the response, such as the value sent by the server in the
    //  Sec-WebSocket-Accept header.
    success = ws.ValidateServerHandshake()
    if success != true {
        print("\(ws.LastErrorText)")
        return
    }

    print("WebSocket connection successful.")

    //  The application may now begin sending and receiving frames on the WebSocket connection.
    //  (At this point, we're done with the rest and socket objects...)

    print("Success.")

}