There are two trait in crate unhtml
FromHtmlThe only method of FromHtml you should care about is fn from_html(html: &str) -> Result<Self, Error> and this method is implemented for all types implemented FromStr<E, T>
rust
impl<E, T> FromHtml for T
where E: std::error::Error + Send + Sync + 'static,
T: FromStr<Err=E> {
fn from_html(html: &str) -> Result<Self, Error> {
Ok(T::from_str(html.trim())?)
}
}
You can implement FromHtml automatically for struct by crate unhtml_derive
VecFromHtmlVecFromHtml is implemented for Vec<T> where T: FromHtml by default
rust
impl<T> VecFromHtml for Vec<T>
where T: FromHtml {
type Elem = T;
}
As FromHtml is implemented for u8 by default
rust
use unhtml::scraper::Html;
use unhtml::VecFromHtml;
let html = Html::parse_fragment(r#"
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="test">
<a href="1"></a>
<a href="2"></a>
<a href="3"></a>
</div>
</body>
</html>
"#);
let results = Vec::<u8>::from_attr("#test > a", "href", html.root_element()).unwrap();
assert_eq!(1u8, results[0]);
assert_eq!(2u8, results[1]);
assert_eq!(3u8, results[2]);