Ad Block engine in Rust

Native Rust module for Adblock Plus syntax (e.g. EasyList, EasyPrivacy) filter parsing and matching.

It uses a tokenisation approach for qucikly reducing the potentially matching rule search space against a URL.

The algorithm is inspired by, and closely follows the algorithm of uBlock Origin and Cliqz.

Somewhat graphical explanation of the algorithm:

Demo

Demo use in Rust:

extern crate adblock;

use adblock::engine::Engine;

#[test]
fn check_simple_use() {
    let rules = vec![
        String::from("-advertisement-icon."),
        String::from("-advertisement-management/"),
        String::from("-advertisement."),
        String::from("-advertisement/script."),
    ];

    let blocker = Engine::from_rules(&rules);
    let blocker_result = blocker.check_network_urls("http://example.com/-advertisement-icon.", "http://example.com/helloworld", "image");
    assert!(blocker_result.matched);
}

Node.js module demo

Note the Node.js module has overheads inherent to boundary crossing between JS and native code.

const AdBlockClient = require('adblock-rs');
let rules = fs.readFileSync('./data/easylist.to/easylist/easylist.txt', { encoding: 'utf-8' }).split('\n');

const client = new AdBlockClient.Engine(rules);

const serializedArrayBuffer = client.serialize(); // Serialize the engine to an ArrayBuffer

console.log(`Engine size: ${(serializedArrayBuffer.byteLength / 1024 / 1024).toFixed(2)} MB`);

console.log("Matching:", client.check("http://example.com/-advertisement-icon.", "http://example.com/helloworld", "image"))
console.log("Matching:", client.check("https://github.githubassets.com/assets/frameworks-64831a3d.js", "https://github.com/AndriusA", "script"))

TODO

• Generate redirect addresses based on provided resources.txt (uBo style)
• Function for extracting CSP directives
• Generate string representation of a rule when debug mode is off (i.e. initial rule is not available)
• Cosmetic filters