rust html parser

Rust HTML Parser

To parse HTML in Rust, you can use the html5ever crate. html5ever is a pure-Rust HTML parser that implements the HTML5 parsing algorithm. It provides a convenient and efficient way to parse HTML documents and extract information from them.

Here's an example of how to use the html5ever crate to parse HTML in Rust:

1. Add the html5ever crate to your Cargo.toml file:

[dependencies]
html5ever = "0.26"

1. Import the necessary modules in your Rust code:

use html5ever::rcdom::{Handle, NodeData};
use html5ever::tendril::TendrilSink;
use html5ever::tree_builder::TreeBuilderOpts;
use html5ever::tree_builder::interface::QuirksMode;
use html5ever::tokenizer::{Tokenizer, TokenSink, Token, TokenizerOpts};
use html5ever::driver::ParseOpts;

1. Define a struct that implements the TokenSink trait to handle the tokens emitted by the tokenizer:

struct MyTokenSink;
impl TokenSink for MyTokenSink {
    // Implement the necessary methods to handle the tokens
    // emitted by the tokenizer
}

1. Create a tokenizer and a token sink, and parse the HTML:

fn parse_html(html: &str) {
    let opts = ParseOpts {
        tokenizer: TokenizerOpts {
            exact_errors: true,
            discard_bom: true,
            profile: false,
            initial_state: None,
            last_start_tag_name: None,
            scripting_enabled: true,
            drop_doctype: false,
            drop_comments: false,
            quirks_mode: QuirksMode::NoQuirks,
        },
        tree_builder: TreeBuilderOpts {
            exact_errors: true,
            scripting_enabled: true,
            iframe_srcdoc: false,
            drop_doctype: false,
            ignore_missing_rules: false,
            quirks_mode: QuirksMode::NoQuirks,
        },
    };

    let sink = MyTokenSink;
    let mut tokenizer = Tokenizer::new(sink, opts.tokenizer);
    tokenizer.feed(html.into(), true);
    tokenizer.end();
}

This is a basic example of how to use the html5ever crate to parse HTML in Rust. You can customize the behavior by implementing additional methods in the MyTokenSink struct to handle specific types of tokens.

Please note that this is just a starting point, and you may need to modify the code to suit your specific use case. For more information and advanced usage, you can refer to the html5ever documentation and examples.