Rack::UrlRepeatedStringValidator

A Rack middleware for exclude strings repeated in the URL, it will be bad requests.

Installation

Add this line to your application's Gemfile:

gem "rack-url-repeated-string-validator"

And then execute:

$ bundle

Or install it yourself as:

$ gem install rack-url-repeated-string-validator

Usage

Rails app

# invalid_keys default: ["amp;"]
# max_allowed default: 3
# logger default: nil
config.middleware.use Rack::UrlRepeatedStringValidator, invalid_keys: ["foo"], max_repeated: 3, logger: Rails.logger

for example...

• OK => http://localhost?foofoofoo=bar
• NG => http://localhost?foofoofoofoo=bar

Rack App

Rack::Builder.new do
  use Rack::UrlRepeatedStringValidator, invalid_keys: ["foo"], max_repeated: 3, logger: logger
  run Rack::Application
end

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 the created tag, and push the .gem file to rubygems.org.