how to use socket in swift (connect, send and get message)

I use the SwiftSocket https://github.com/swiftsocket/SwiftSocket for TCP connection. It is easy to use. For example for using it (i add comments to it):

I have my wrapper for work with this lib and this is the method how to send request and get response:

    private func blockingRequest(data: String, client: TCPClient?) -> (data: String?, error: ConnectionError?) {
        // It use ufter connection
        if client != nil {
            // Send data
            var (isSuccess, errorMessage) = client!.send(str: data)
            if isSuccess {
                // Read response data
                var data = client!.read(1024*10)
                if let d = data {
                    // Create String from response data
                    if let str = NSString(bytes: d, length: d.count, encoding: NSUTF8StringEncoding) as? String {
                        return (data: str, error: nil)
                    } else {
                        return (data: nil, error: ConnectionError.BadResponseData)
                    }
                } else {
                    return (data: nil, error: ConnectionError.BadResponseData)
                }
            } else {
                println(errorMessage)
                return (data: nil, error: ConnectionError.RequestError)
            }
        } else {
            return (data: nil, error: ConnectionError.RequestError)
        }
    }