Can Kanna handle scraping of websites with SSL/TLS encryption?

Yes, Kanna (also known as SwiftSoup when referring to a Swift library similar to the popular JSoup library for Java) can handle the scraping of websites with SSL/TLS encryption. In web scraping, the SSL/TLS encryption of a website is transparent to the scraping tools because the HTTPS protocol is handled at a lower layer by the HTTP client library you use.

The scraping process generally involves two main steps:

1. Fetching the web page content over HTTP/HTTPS.
2. Parsing the fetched content and extracting the needed data.

The SSL/TLS encryption concerns the first step. When you request a webpage using HTTPS, the underlying library takes care of the encryption and decryption processes. As a developer, you don't typically need to handle the encryption directly; you just need to make sure you can successfully make HTTPS requests to the target server.

In Swift, you might use URLSession to handle the network request. Here's an example of how you might fetch a webpage using SSL/TLS in Swift, and then use Kanna to parse it:

import Foundation
import Kanna

let url = URL(string: "https://example.com")!

let task = URLSession.shared.dataTask(with: url) { data, response, error in
    if let error = error {
        print("Error fetching the webpage: \(error)")
        return
    }

    guard let httpResponse = response as? HTTPURLResponse,
          (200...299).contains(httpResponse.statusCode) else {
        print("Error with the response, unexpected status code: \(response)")
        return
    }

    if let mimeType = httpResponse.mimeType, mimeType == "text/html",
       let data = data,
       let htmlString = String(data: data, encoding: .utf8) {
        do {
            let doc = try Kanna.HTML(html: htmlString, encoding: String.Encoding.utf8)
            // Now you can use Kanna functions to extract data.
            // For example, extracting all the <a> tags:
            for link in doc.xpath("//a | //link") {
                print(link.text ?? "")
                print(link["href"] ?? "")
            }
        } catch {
            print("Error parsing the HTML: \(error)")
        }
    }
}

task.resume()

In this example, URLSession handles the network communication, including any SSL/TLS details. Kanna is then used to parse the HTML and extract data.

Remember that when scraping websites, you should always respect the website's robots.txt rules and terms of service. Additionally, heavy scraping can put a significant load on the website's servers and may be considered abusive behavior. Always scrape responsibly and consider using official APIs if they are available.