Can I use headless_chrome (Rust) with Rust's async/await features?

Yes, you can use headless_chrome with Rust's async/await features, but you will need to ensure that the headless_chrome crate you are using is compatible with async/await. As of my last update, the official headless_chrome crate does not natively support async/await, as it's based on a synchronous API.

However, you can still use async/await in Rust with a headless Chrome browser by using the fantoccini crate, which is an asynchronous WebDriver client for Rust. fantoccini uses tokio for its async runtime and communicates with browsers via the WebDriver protocol.

Here's a basic example of how to use fantoccini with async/await in Rust:

First, add the dependencies in your Cargo.toml:

[dependencies]
fantoccini = "0.22"
tokio = { version = "1", features = ["full"] }

Then, you can write an async main function in Rust to control headless Chrome:

use fantoccini::{ClientBuilder, Locator};
use tokio;

#[tokio::main]
async fn main() -> Result<(), fantoccini::error::CmdError> {
    // Connect to the WebDriver server running at `http://localhost:4444`
    // Make sure the WebDriver server (like chromedriver or geckodriver) is running.
    let client = ClientBuilder::native()
        .connect("http://localhost:4444")
        .await
        .expect("failed to connect to WebDriver");

    // Go to the Rust programming language website.
    client.goto("https://www.rust-lang.org/").await?;

    // Find an element using a CSS selector.
    let elem = client.find(Locator::Css("a.install")).await?;

    // Print the text of the element.
    println!("Text of the element: {:?}", elem.text().await?);

    // Always explicitly close the browser session.
    client.close().await
}

In the snippet above, we use tokio::main to create an asynchronous runtime, and then we initiate a connection to the WebDriver server (e.g., chromedriver). We navigate to the Rust website, find an element on the page, print its text, and then close the browser session.

Please note that you need to have a WebDriver-compatible server like chromedriver for Chrome or geckodriver for Firefox running before executing the above Rust code. This can usually be started with a simple command-line invocation:

chromedriver --port=4444

This will start the chromedriver on port 4444, which you can then connect to with the fantoccini client in your Rust code.

Keep in mind that the async ecosystem in Rust is continually evolving, and new crates might appear that offer headless Chrome support with async/await. Always check the latest documentation and crate versions for the most up-to-date information.