Swift -如何检查Rtmp url是否有效？

import UIKit

func checkRTMPURLValidity(urlString: String) {
    if let url = URL(string: urlString) {
        let request = URLRequest(url: url)
        let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
            if let httpResponse = response as? HTTPURLResponse {
                if httpResponse.statusCode == 200 {
                    print("RTMP URL is valid.")
                } else {
                    print("RTMP URL is invalid.")
                }
            }
        }
        task.resume()
    }
}

// 使用示例
let rtmpURL = "rtmp://example.com/live/stream"
checkRTMPURLValidity(urlString: rtmpURL)