Rocket/examples/todo/src/static_files.rs

use std::fs::File;
use std::io;

#[get("/<top>/<file>")]
fn all_level_one(top: &str, file: &str) -> io::Result<File> {
    let file = format!("static/{}/{}", top, file);
    File::open(file)
}

#[get("/<file>")]
fn all(file: &str) -> io::Result<File> {
    let file = format!("static/{}", file);
    File::open(file)
}