Cargo.toml

[package]
name = "xmltest"
version = "0.1.0"
edition = "2021"

[dependencies]
futures = "0.3.30"
quick-xml = "0.32.0"
tokio = { version = "1.38.0", features = ["macros", "rt-multi-thread", "fs"] }

main.rs

use std::path::PathBuf;

fn svgs() -> impl Iterator<Item = PathBuf> {
    let content = std::path::Path::new("data").read_dir().expect("no data dir");
    let files = content.filter_map(Result::ok).map(|entry| entry.path());
    let svgs = files.filter(|path| path.extension().map_or(false, |ext| ext == "svg"));
    return svgs;
}

fn sizes(path: PathBuf) -> Option<(PathBuf, String, String)> {
    let mut reader = quick_xml::reader::Reader::from_file(&path).ok()?;
    let mut buffer = Vec::new();

    let quick_xml::events::Event::Start(e) = reader.read_event_into(&mut buffer).ok()? else {
        return None;
    };

    let width = e.try_get_attribute("width").ok()??.unescape_value().ok()?.to_string();
    let height = e.try_get_attribute("height").ok()??.unescape_value().ok()?.to_string();

    return Some((path, width, height));
}

#[tokio::main]
async fn main() {
    futures::future::join_all(svgs().map(|path| async {
        if let Ok(Some((path, width, height))) = tokio::task::spawn_blocking(|| sizes(path)).await {
            println!("{}: {width}x{height}", path.display());
        }
    }))
    .await;
}