How do I use HTTP/2 and HTTP/3 features with URLSession in Swift?

HTTP/2 and HTTP/3 are modern protocols that offer substantial improvements over HTTP/1.1, including reduced latency, multiplexing requests, and connection reuse. Using URLSession in Swift allows developers to leverage these protocols seamlessly, improving the performance of their network tasks.

Configuring URLSession for HTTP/2 and HTTP/3

To take advantage of HTTP/2 and HTTP/3 features with URLSession, you generally don't need to do anything special, as URLSession is designed to automatically use these protocols when available. However, you might want to ensure that your server supports HTTP/2 or HTTP/3 and is properly configured.

Example Usage with URLSession

Here is a basic example of how to create a URLSession to make a network request using the latest protocols:

let url = URL(string: "https://www.example.com")!
let session = URLSession.shared

let task = session.dataTask(with: url) { data, response, error in
    if let error = error {
        print("Error: \(error)")
        return
    }
    
    if let data = data, let response = response as? HTTPURLResponse {
        print("Response code: \(response.statusCode)")
        print("Data received: \(String(data: data, encoding: .utf8) ?? "")")
    }
}

task.resume()