Web Discovery Project

This repository contains the client (extension) code for Web Discovery Project which runs in the Brave browser.

Setup

Linux

If you don't have Brave browser installed on your system: ``.

$ npm install
$ ./update-brave.sh
$ BRAVE_PATH=./brave/brave npm run start

You can also set the BRAVE_PATH environment variable to your global Brave binary $(which brave). The last command will build the extension and start Brave with the extension loaded. Everything should work locally with this setup. By default it will rely on the sandbox environment deployed on AWS.

Mac

$ BRAVE_PATH="/Applications/Brave Browser.app/Contents/MacOS/Brave Browser" npm run start

Documentation

For more information about the Web Discovery methodology, privacy and security guarantees as well as examples of messages sent, visit this README.

Manual setup

Yarn

$ yarn install --frozen-lock
$ yarn start:build # build extension
$ yarn start:brave # start Brave with extension loaded

Npm

$ npm ci
$ npm run start:build # build extension
$ npm run start:brave # start Brave with extension loaded

Patterns

There are prod and test versions of the patterns file. Test patterns are used for tests only. Prod patterns are fetched from CDN (https://patterns.hpn.brave.com/patterns.gz). If you have to change patterns during development you need to:

Serve a gzipped patterns file locally using an HTTP server.
Update patterns URL for your environment in the config file to point to your locally served file.
Disable the signature verification of a patterns file by setting WDP_PATTERNS_SIGNING option to true in the config file for your environment. For sandbox environment such file is /configs/sandbox.js.

Useful commands

Open extension dev tools (burger menu > extensions > developer mode toggle > background page) then switch to console tab.

For `query` messages

Force updating WebDiscoveryProject patterns:

WDP.app.modules['web-discovery-project'].background.webDiscoveryProject.patternsLoader.resourceWatcher.forceUpdate()

After visiting a SERP page, force double-fetch to happen:

WDP.app.modules['web-discovery-project'].background.webDiscoveryProject.strictQueries.map(x=>x.tDiff=0)

For `page` messages

Open a new tab and visit https://www.marca.com/ (or another URL, and replace the occurrences in the following commands).

Force an active page (tab is still open) to the database to be double-fetched...

WDP.app.modules['web-discovery-project'].background.webDiscoveryProject._debugRemoveFromActivePages('https://www.marca.com/')

After forcing this, https://www.marca.com/ will no longer be in dict at:

WDP.app.modules['web-discovery-project'].background.webDiscoveryProject.state['v']

See URLs on database waiting to be double-fetched:

WDP.app.modules['web-discovery-project'].background.webDiscoveryProject.listOfUnchecked(1000000000000, 0, null, function(x) {console.log(x)})

Force a double-fetch of a single URL, (URL as appears in the table above, it might have been canonized)

WDP.app.modules['web-discovery-project'].background.webDiscoveryProject.forceDoubleFetch("https://www.marca.com/")

Tests

There are two kinds of tests in WDP: unit and integration. All of them run in CI and you can run then on your computer too.

Unit tests

$ ./fern.js test configs/ci/unit-tests.js

You should now get live feedback about the running tests. If you change the code, a rebuild will be triggered and tests will restart.

Fixtures

Some unit tests rely on fixtures which are directories containing page HTML and expected extracted data. Fixture names contain a search query and a date it was created on. For example if you want to add a new google fixture for the query george washington run the following commands:

cd ./modules/web-discovery-project/tests/unit
mkdir ./fixtures/content-extractor/go/george-washington-2023-10-04
./generate-fixtures.sh

Integration tests

Integration tests (in Brave):

./fern.js test configs/ci/integration-tests.js -l brave-web-ext --brave /opt/brave.com/brave/brave-browser

Regression tests

Regression tests (in Brave):

./fern.js test configs/ci/integration-tests.js -l brave-web-ext --grep UtilityRegression --brave /opt/brave.com/brave/brave-browser

Note that you should replace the path to Brave in the command above.

You can also use the --keep-open flag so that the test runner keeps watching for code changes and will restart the tests whenever that happens.

Another useful flag is --grep, which allows you to select a subset of tests to run based on their names. For example:

./fern.js test configs/ci/integration-tests.js -l brave-web-ext --brave /opt/brave.com/brave/brave-browser --keep-open --grep registerContentScript

Integration tests in Docker:

./run_tests_in_docker.sh "configs/ci/integration-tests.js -l brave-web-ext --brave /opt/brave.com/brave/brave-browser"

Copyright

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.

brave/web-discovery-project