Swift HTML content of URL of mobile site - html

Question

I've got a URL and I'm trying to get the HTML content of the site the following way:
func getHtml(_ urlString: String) -> String? {
guard let url = URL(string: urlString) else {
return nil
}
do {
let html = try String(contentsOf: url, encoding: .ascii)
return html
} catch let error {
print("Error: \(error)")
return nil
}
}
if let html = getHtml("https://m.youtube.com/") {
print(html)
}
My issue is, that this gets me the html of the desktop version of the site, however I need the html of the mobile version.
I'm not looking for a workaround for this specific site, but for a general solution, so that, given any URL of a mobile site, it doesn't default to getting me the html of the desktop site.

Answer 1

If you use Viewcontroller in iOS to get the HTML, you can use hidden WKWebView as an alternative and implement the WKNavigationDelegate which has the didFinish method where you can use webView.evaluateJavaScript. As wkwebview is loading from mobile, you will get the mobile version html. Here is the sample of the code.
import UIKit
import WebKit
class YourViewController: UIViewController, WKNavigationDelegate {
let webView = WKWebView()
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func BtnClicked(_ sender: Any) {
loadWeb(url: "https://m.youtube.com/")
}
func loadWeb(url: String) {
if let myURL = URL(string: url) {
let request = URLRequest(url: myURL)
webView.navigationDelegate = self
webView.load(request)
}
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
webView.evaluateJavaScript("document.documentElement.outerHTML") { (data, error) in
//use html data
print("data", data, error.debugDescription)
}
}
}