In Rust, you can use the scraper crate, which is a web scraping library that provides tools for parsing HTML and navigating the DOM using CSS selectors. To use CSS selectors with scraper, you'll need to do the following:
- Add the
scrapercrate to yourCargo.tomlfile. - Parse the HTML document with
scraper. - Use the
Selectorstruct to create a CSS selector. - Use the
selectmethod to find elements that match the CSS selector.
Here's an example of how you can use CSS selectors with the scraper crate in Rust:
First, add the scraper crate to your Cargo.toml:
[dependencies]
scraper = "0.12"
Now, you can write a Rust program that uses the scraper crate to select elements using CSS selectors:
extern crate scraper;
use scraper::{Html, Selector};
fn main() {
// The HTML content you want to scrape
let html_content = r#"
<html>
<body>
<div class="info">
<p>Some information here</p>
</div>
<div class="info">
<p>More information here</p>
</div>
</body>
</html>
"#;
// Parse the HTML
let document = Html::parse_document(html_content);
// Create the CSS selector
let selector = Selector::parse(".info").unwrap();
// Select elements with the CSS selector
for element in document.select(&selector) {
// Do something with each selected element
if let Some(text) = element.text().next() {
println!("Text found: {}", text.trim());
}
}
}
This program will output:
Text found: Some information here
Text found: More information here
In this example, we are looking for div elements with the class info. The Selector::parse method is used to create a Selector from a CSS selector string. Once you have the Selector, you use the select method on the Html document to get an iterator over all the matching elements. Then you can manipulate or extract data from these elements as needed.
Remember to handle errors accordingly in a real application, such as when a selector cannot be parsed or when no elements match the selector.
