As of my last update, the scraper crate in Rust does not have built-in support for regular expressions within the scraping functionality itself. scraper is designed for HTML parsing and is based upon the html5ever and selectors crates, which use CSS selectors for querying HTML documents.
If you want to use regular expressions to further process the text that you've extracted using scraper, you'll need to use Rust's regex crate. The regex crate provides a library for parsing, compiling, and executing regular expressions in Rust.
Here's an example of how you might use scraper in conjunction with the regex crate to scrape data from an HTML document and then use a regular expression to process the extracted data:
use scraper::{Html, Selector};
use regex::Regex;
fn main() {
// Your HTML content
let html_content = r#"
<html>
<body>
<p>Some example text with a phone number: (123) 456-7890.</p>
<p>Another example text with a phone number: (987) 654-3210.</p>
</body>
</html>
"#;
// Parse the HTML document
let document = Html::parse_document(html_content);
// Create a Selector for the <p> elements
let selector = Selector::parse("p").unwrap();
// Create a regular expression to match phone numbers
let phone_regex = Regex::new(r"\(\d{3}\) \d{3}-\d{4}").unwrap();
// Iterate over the <p> elements in the HTML
for element in document.select(&selector) {
// Extract the text from each <p> element
let text = element.text().collect::<Vec<_>>().concat();
// Use the regular expression to find phone numbers in the text
for caps in phone_regex.captures_iter(&text) {
println!("Found phone number: {}", &caps[0]);
}
}
}
In this example, we first parse the HTML content using scraper, then select all <p> elements with the relevant CSS selector. Afterward, we use the regex crate to define a regular expression for phone numbers and use it to search the extracted text content for matches.
To run this code, you need to include scraper and regex as dependencies in your Cargo.toml file:
[dependencies]
scraper = "0.12.0" # Check the latest version on https://crates.io/crates/scraper
regex = "1.5.4" # Check the latest version on https://crates.io/crates/regex
Keep in mind that you need to adjust the regular expression pattern according to the specific data you are looking for, and also ensure that you handle the text extraction logic according to the structure of the HTML you are working with.
