How do I use headless_chrome (Rust) to perform actions like clicking and typing?

To use headless_chrome in Rust to perform actions like clicking and typing, you'll first need to include the crate in your Cargo.toml file. headless_chrome is not an official crate, so you might be referring to headless_chrome as a term for running Chrome in headless mode using a Rust crate like fantoccini or thirtyfour.

Below is an example using the thirtyfour crate, which is a WebDriver client for Rust, compatible with Selenium. This allows you to control a web browser in a headless mode. Here's how you can set it up and use it to perform actions like clicking and typing.

First, add thirtyfour to your Cargo.toml:

[dependencies]
thirtyfour = "0.26.2"
tokio = { version = "1", features = ["full"] }

Here's an example of how you might use thirtyfour to navigate to a page, click a button, and type into an input field:

use thirtyfour::prelude::*;
use tokio;

#[tokio::main]
async fn main() -> WebDriverResult<()> {
    // Launch a new browser in headless mode
    let caps = DesiredCapabilities::chrome();
    let driver = WebDriver::new("http://localhost:4444", &caps).await?;

    // Navigate to the webpage
    driver.get("http://example.com").await?;

    // Find an element and click on it
    let button_selector = By::Css("button#myButton");
    let button = driver.find_element(button_selector).await?;
    button.click().await?;

    // Find an input field and type into it
    let input_selector = By::Css("input#myInput");
    let input = driver.find_element(input_selector).await?;
    input.send_keys("Hello, world!").await?;

    // Optionally, you can submit a form after typing
    let form_selector = By::Css("form#myForm");
    let form = driver.find_element(form_selector).await?;
    form.submit().await?;

    // Always explicitly close the browser
    driver.quit().await?;

    Ok(())
}

In this example, replace http://localhost:4444 with the URL to your Selenium server. If you're running Selenium in a Docker container or somewhere else, the URL might be different. The #myButton and #myInput selectors should be replaced with the actual selectors for the button and input field you want to interact with on the webpage you're testing.

Please note that the above example assumes you have a WebDriver like chromedriver running and accessible at http://localhost:4444. You would also need to have Chrome installed on your machine.

For a more complete example and documentation, you should refer to the thirtyfour crate's documentation and repository: https://github.com/stevepryde/thirtyfour

Keep in mind that web scraping and automating web interactions should be done in accordance with the terms of service of the website you are interacting with, and you should always respect robots.txt files and other indications of the website owner's preferences.