ios解析域名解析

import Foundation

func resolveDomain(domain: String, completion: @escaping (Result<[String], Error>) -> Void) {
    let url = URL(string: "https://\(domain)")!
    let task = URLSession.shared.dataTask(with: url) { data, response, error in
        if let error = error {
            completion(.failure(error))
            return
        }
        guard let httpResponse = response as? HTTPURLResponse,
              (200...299).contains(httpResponse.statusCode) else {
            completion(.failure(NSError(domain: "", code: -1, userInfo: [NSLocalizedDescriptionKey: "Invalid response"])))
            return
        }
        let ipAddresses = data?.map { String(format: "%02x%02x%02x%02x", $0[0], $0[1], $0[2], $0[3]) } ?? []
        completion(.success(ipAddresses))
    }
    task.resume()
}

resolveDomain(domain: "www.example.com") { result in
    switch result {
    case .success(let ipAddresses):
        print("IP Addresses: \(ipAddresses)")
    case .failure(let error):
        print("Error: \(error.localizedDescription)")
    }
}