gcrawler

Gcrawler

Google search crawler for Ruby version. Crawling each links' text and url by keywords on Google.com.

Installation

Add this line to your application's Gemfile:

gem 'gcrawler'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install gcrawler

Usage

    require 'gcrawler'

    # Set proxy server, multiple IPs should be much safer than single IP.
    proxies = [
        { ip: '127.0.0.1', port: '7890' },
        ...
    ]

    # Exclude the hosts from results' links.
    exclude_hosts = [
        'accounts.google.com',
        'support.google.com'
    ]

    # Disable to search in the black domains.
    black_domains = [
        'www.google.at',
        'www.google.bf'
    ]

    google_crawler = GoogleCrawler.new(
        proxies: proxies, 
        black_domains: black_domains, 
        exclude_hosts: exclude_hosts
    )

    # Output: Mechanize::Page, see https://github.com/sparklemotion/mechanize
    pp google_crawler.search_as_page('お肉とチーズの専門店', 'ミートダルマ札幌店')

    # Output: [{text: , url:}, ...]
    pp google_crawler.search_as_object('お肉とチーズの専門店', 'ミートダルマ札幌店', country: 'ja')

    # Output: ['url1', 'url2', ...]
    pp google_crawler.search_as_url('お肉とチーズの専門店', 'ミートダルマ札幌店', country: 'ja')

    # Get the second page:
    pp google_crawler.search_as_url('お肉とチーズの専門店', 'ミートダルマ札幌店', country: 'ja', start: 10)

Function Input and Output definition:

search_as_page:
    Args:
        keywords (varargs): kw1, kw2, kw3, ...
        language (str, optional): Query language. Defaults to nil.
        num (uint, optional): Number of results per page(default is 10 per page). Defaults to nil.
        start (int, optional): Offset. Defaults to 0.
        country (str, optional): Query country, Defaults to None, example: countryCN or cn or CN.
        pause (uint, optional): Set crawling delay seconds bwtween two requests. 
                                Too short which may be forbidden by Google crawling monitor. 
                                Defaults to 0.

    Return:
        Mechanize::Page, see https://github.com/sparklemotion/mechanize


search_as_url:
    Args:
        keywords (varargs): kw1, kw2, kw3, ...
        language (str, optional): Query language. Defaults to nil.
        num (uint, optional): Number of results per page(default is 10 per page). Defaults to nil.
        start (int, optional): Offset. Defaults to 0.
        country (str, optional): Query country, Defaults to None, example: countryCN or cn or CN.
        pause (uint, optional): Set crawling delay seconds bwtween two requests. 
                                Too short which may be forbidden by Google crawling monitor. 
                                Defaults to 0.

    Return:
        ['url1', 'url2', ...]


search_as_object:
    Args:
        keywords (varargs): kw1, kw2, kw3, ...
        language (str, optional): Query language. Defaults to nil.
        num (uint, optional): Number of results per page(default is 10 per page). Defaults to nil.
        start (int, optional): Offset. Defaults to 0.
        country (str, optional): Query country, Defaults to None, example: countryCN or cn or CN.
        pause (uint, optional): Set crawling delay seconds bwtween two requests. 
                                Too short which may be forbidden by Google crawling monitor. 
                                Defaults to 0.

    Return:
        [{text: xxx, url: xxx}, ...]

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/gcrawler. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

Inspiration

gcrawler is greatly inspired by Python version for Ruby.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Gcrawler project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.