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20 hours ago •
causal-agent
causal-agent
HTML parsing and querying with CSS selectors
scraper
HTML parsing and querying with CSS selectors.
scraper is on Crates.io and GitHub.
Scraper provides an interface to Servo's html5ever and selectors crates, for browser-grade
parsing and querying.
Examples
Parsing a document
use scraper::Html;
let html = r#"
<!DOCTYPE html>
<meta charset="utf-8">
<title>Hello, world!</title>
<h1 class="foo">Hello, <i>world!</i></h1>
"#;
let document = Html::parse_document(html);
Parsing a fragment
use scraper::Html;
let fragment = Html::parse_fragment("<h1>Hello, <i>world!</i></h1>");
Parsing a selector
use scraper::Selector;
let selector = Selector::parse("h1.foo").unwrap();
Selecting elements
use scraper::{Html, Selector};
let html = r#"
<ul>
<li>Foo</li>
<li>Bar</li>
<li>Baz</li>
</ul>
"#;
let fragment = Html::parse_fragment(html);
let selector = Selector::parse("li").unwrap();
for element in fragment.select(&selector) {
assert_eq!("li", element.value().name());
}
Selecting descendent elements
use scraper::{Html, Selector};
let html = r#"
<ul>
<li>Foo</li>
<li>Bar</li>
<li>Baz</li>
</ul>
"#;
let fragment = Html::parse_fragment(html);
let ul_selector = Selector::parse("ul").unwrap();
let li_selector = Selector::parse("li").unwrap();
let ul = fragment.select(&ul_selector).next().unwrap();
for element in ul.select(&li_selector) {
assert_eq!("li", element.value().name());
}
Accessing element attributes
use scraper::{Html, Selector};
let fragment = Html::parse_fragment(r#"<input name="foo" value="bar">"#);
let selector = Selector::parse(r#"input[name="foo"]"#).unwrap();
let input = fragment.select(&selector).next().unwrap();
assert_eq!(Some("bar"), input.value().attr("value"));
Serializing HTML and inner HTML
use scraper::{Html, Selector};
let fragment = Html::parse_fragment("<h1>Hello, <i>world!</i></h1>");
let selector = Selector::parse("h1").unwrap();
let h1 = fragment.select(&selector).next().unwrap();
assert_eq!("<h1>Hello, <i>world!</i></h1>", h1.html());
assert_eq!("Hello, <i>world!</i>", h1.inner_html());
Accessing descendent text
use scraper::{Html, Selector};
let fragment = Html::parse_fragment("<h1>Hello, <i>world!</i></h1>");
let selector = Selector::parse("h1").unwrap();
let h1 = fragment.select(&selector).next().unwrap();
let text = h1.text().collect::<Vec<_>>();
assert_eq!(vec!["Hello, ", "world!"], text);
Contributing
Please feel free to open pull requests. If you're planning on implementing something big (i.e. not fixing a typo, a small bug fix, minor refactor, etc) then please open an issue first.
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HTML parsing and querying with CSS selectors