Reactive Swift consume live data from API - need basic example - rx-swift

Question

I’m new to RxSwift and I’m looking for a basic example of how to print in console live data streaming from an backend. I have a backend which is streaming some dummy data every 1 second, I can see it with a curl request and I want to be able to observe and subscribe and print it out in console automatically, please help!

Answer 1

I assume you are opening a socket connection to your server in order to receive live data. You can use RxWebSocket to handle this data flow. There are examples in the documentation/readme for the API.

Answer 2

https://github.com/daltoniam/Starscream/tree/master/examples/SimpleTest/SimpleTest
import UIKit
import Starscream
class ViewController: UIViewController, WebSocketDelegate {
var socket: WebSocket!
#IBOutlet weak var label: UILabel!
#IBOutlet weak var textField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
var request = URLRequest(url: URL(string: "wss://echo.websocket.org")!)
request.timeoutInterval = 5
socket = WebSocket(request: request)
socket.delegate = self
socket.connect()
}
// MARK: Websocket Delegate Methods.
func websocketDidConnect(socket: WebSocketClient) {
print("websocket is connected")
}
func websocketDidDisconnect(socket: WebSocketClient, error: Error?) {
if let e = error as? WSError {
print("websocket is disconnected: \(e.message)")
} else if let e = error {
print("websocket is disconnected: \(e.localizedDescription)")
} else {
print("websocket disconnected")
}
}
func websocketDidReceiveMessage(socket: WebSocketClient, text: String) {
self.label.text = text
print("Received text: \(text)")
}
func websocketDidReceiveData(socket: WebSocketClient, data: Data) {
print("Received data: \(data.count)")
}
// MARK: Write Text Action
#IBAction func send(_ sender: UIButton) {
socket.write(string: "Hello \(textField.text!)")
}
// MARK: Disconnect Action
#IBAction func disconnect(_ sender: UIBarButtonItem) {
if socket.isConnected {
sender.title = "Connect"
socket.disconnect()
} else {
sender.title = "Disconnect"
socket.connect()
}
}
}
extension URL {
init(staticString string: StaticString) {
guard let url = URL(string: "\(string)") else {
preconditionFailure("Invalid static URL string: \(string)")
}
self = url
}
}