website.swift

import Foundation

func loadWebsite(url: URL?) {
    let group = DispatchGroup()
    group.enter()

    let task = URLSession.shared.dataTask(with: url!) { data, response, error in
        if let error = error {
            print(error)
            group.leave()
            return
        }
        guard let httpResponse = response as? HTTPURLResponse,
            (200...299).contains(httpResponse.statusCode) else {
            print("The httpResponse is not 2xx")
            group.leave()
            return
        }
        if let mimeType = httpResponse.mimeType, mimeType == "text/html",
            let data = data,
            let string = String(data: data, encoding: .utf8) {
            
            print(string) // print out website's html on the terminal
            group.leave()
        }
    }
    task.resume()
    group.wait()
}

loadWebsite(url: URL(string: "https://sweeneyapps.com"))