LOL HTML

Low Output Latency streaming HTML rewriter/parser with CSS-selector based API.

It is designed to modify HTML on the fly with minimal buffering. It can quickly handle very large documents, and operate in environments with limited memory resources.

The crate serves as a back-end for the HTML rewriting functionality of Cloudflare Workers, but can be used as a standalone library with a convenient API for a wide variety of HTML rewriting/analysis tasks.

Documentation

https://docs.rs/lol-html

Example

Rewrite insecure hyperlinks:

```rust use lol_html::{element, HtmlRewriter, Settings};

fn main() -> Result<(), Box> { let mut output = vec![];

let mut rewriter = HtmlRewriter::try_new(
    Settings {
        element_content_handlers: vec![
            element!("a[href]", |el| {
                let href = el
                    .get_attribute("href")
                    .expect("href was required")
                    .replace("http:", "https:");

                el.set_attribute("href", &href)?;

                Ok(())
            })
        ],
        ..Settings::default()
    },
    |c: &[u8]| output.extend_from_slice(c)
)?;

rewriter.write(b"<div><a href=")?;
rewriter.write(b"http://example.com>")?;
rewriter.write(b"</a></div>")?;
rewriter.end()?;

assert_eq!(
    String::from_utf8(output)?,
    r#"<div><a href="https://example.com"></a></div>"#
);
Ok(())

} ```

License

BSD licensed. See the LICENSE file for details.