(Swift) WebSocket Connect

Demonstrates how to establish a WebSocket connection. Once the connection is established, messages may be sent back-and-forth. Messages are sent in frames, where the last frame in the message is indicated by a "final" bit. A frame constitutes the entire message if the first frame sent has the "final" bit sent. (In most cases, you'll probably be sending single-frame messages.)

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    //  --------------------------------------------------
    //  A WebSocket connection begins life as an HTTP GET request containing a few special header fields,
    //  such as "Upgrade: websocket".

    //  Your application will use the Chilkat Rest class to send the initial HTTP GET.  This allows you
    //  to use the full capability of the Chilkat Rest class to customize the GET for any particular situation.
    //  For example:
    // 
    //    - If custom HTTP request header fields must be added.
    //    - If authentication is required, such as OAuth2, OAuth1, Basic HTTP Auth, etc.
    //    - If HTTPS, SSH Tunneling, Proxies (HTTP or SOCKS), or other advanced connection or TLS features are required.
    // 

    let rest = CkoRest()
    var success: Bool = rest.Connect("someserver.com", port: 80, tls: false, autoReconnect: false)
    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-something")
    rest.AddHeader("Origin", value: "http://someserver.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 object...)

}