Swift 5如何从URL获取HTML

import Foundation
import HTMLKit

func fetchHTML(from url: URL, completion: @escaping (Result<String, Error>) -> Void) {
    let task = URLSession.shared.dataTask(with: url) { data, response, error in
        if let error = error {
            completion(.failure(error))
            return
        }
        
        guard let data = data else {
            completion(.failure(NSError(domain: "", code: -1, userInfo: [NSLocalizedDescriptionKey: "No data received"])))
            return
        }
        
        do {
            let html = try HTMLDocument(data: data)
            let htmlString = html.body?.innerHTML ?? ""
            completion(.success(htmlString))
        } catch {
            completion(.failure(error))
        }
    }
    
    task.resume()
}

// 使用示例
let url = URL(string: "https://example.com")!
fetchHTML(from: url) { result in
    switch result {
    case .success(let html):
        print("HTML: \(html)")
    case .failure(let error):
        print("Error: \(error.localizedDescription)")
    }
}