You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main.rs
    path of file: ./repos/Rust-Full-Stack/actix/actix_examples/rustls/src
    
    the code of the file until where you have to start completion: use std::fs::File;
use std::io::BufReader;

use actix_files::Files;
use actix_web::{middleware, web, App, Error, HttpRequest, HttpResponse, HttpServer};
use rustls::internal::pemfile::{certs, rsa_private_keys};
use rustls::{NoClientAuth, ServerConfig};

/// simple handle
fn index(req: HttpRequest) -> Result<HttpResponse, Error> {
    println!("{:?}", req);
    Ok(HttpResponse::Ok()
        .content_type("text/plain")
        .body("Welcome!"))
}

fn main() -> std::io::Result<()> {
    if std::env::var("RUST_LOG").is_err() {
        std::env::set_var("RUST_LOG", "actix_web=info");
    }
    env_logger::init();

    // load ssl keys
    let mut config = ServerConfig::new(NoClientAuth::new());
    let cert_file = &mut BufReader::new(File::open("cert.pem").unwrap());
    let key_file = &mut BufReader::new(File::open("key.pem").unwrap());
    let cert_chain = certs(cert_file).unwrap();
    let mut keys = rsa_private_keys(key_file).unwrap();
    config.set_single_cert(cert_chain, keys.remove(0)).unwrap();

    HttpServer:
    
fn main() -> std::io::Result<()> {
    if std::env::var("RUST_LOG").is_err() {
        std::env::set_var("RUST_LOG", "actix_web=info");
    }
    env_logger::init();

    // load ssl keys
    let mut config = ServerConfig::new(NoClientAuth::new());
    let cert_file = &mut BufReader::new(File::open("cert.pem").unwrap());
    let key_file = &mut BufReader::new(File::open("key.pem").unwrap());
    let cert_chain = certs(cert_file).unwrap();
    let mut keys = rsa_private_keys(key_file).unwrap();
    config.set_single_cert(cert_chain, keys.remove(0)).unwrap();

    HttpServer::new(|| {
        App::new()
            // enable logger
            .wrap(middleware::Logger::default())
            // register simple handler, handle all methods
            .service(web::resource("/index.html").to(index))
            // with path parameters
            .service(web::resource("/").route(web::get().to(|| {
                HttpResponse::Found()
                    .header("LOCATION", "/index.html")
                    .finish()
            })))
            .service(Files::new("/static", "static"))
    })
    .bind_rustls("127.0.0.1:8443", config)?
    .run()
}