README.md
# is_crawler [![Gem Version](https://badge.fury.io/rb/is_crawler.png)](http://badge.fury.io/rb/is_crawler) [![Build Status](https://travis-ci.org/ccashwell/is_crawler.png?branch=master)](https://travis-ci.org/ccashwell/is_crawler) [![Code Climate](https://codeclimate.com/github/ccashwell/is_crawler.png)](https://codeclimate.com/github/ccashwell/is_crawler)
This gem does one thing: determine if the supplied string matches a known crawler or bot. It matches against a very short list of strings found in the user agents that represent over 95% of crawler traffic. IMO, if it ain't detected, it ain't important.
## Installation
Add this line to your application's Gemfile:
gem 'is_crawler'
And then execute:
$ bundle
Or install it yourself as:
$ gem install is_crawler
## Usage
You can use the `is_crawler?` method with just a user agent string to determine if it matches *any* crawler, like so:
class MyController < ActionController::Base
include IsCrawler
def index
if is_crawler? request.env["HTTP_USER_AGENT"]
render 'special_crawler_index'
else
render 'normal_boring_index'
end
end
end
...or provide one or more crawlers to find out if the string matches *specific* crawlers:
is_crawler?("Some User Agent/1.0", :facebook, :google)
...or you can use the method sugar:
is_facebook_crawler? request.env["HTTP_USER_AGENT"]
...and you can add to the list of detectables:
Crawler::CUSTOM << Crawler.new(:custom_crawler_name, "string that is always present in the crawler's user agent")
That's it!
## Contributing
Missing out on a noteworthy crawler? Find a problem? Ideas for improvement?
Raise an issue, or:
1. Fork it
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Add some feature'`)
4. Push to the branch (`git push origin my-new-feature`)
5. Create new Pull Request