67 lines
1.8 KiB
Markdown
67 lines
1.8 KiB
Markdown
# rack-filter-param
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Refactoring something behind an API? Plagued by extraneous HTTP params? `rack-filter-param` might be for you.
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[](https://travis-ci.org/rfwatson/rack-filter-param)
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## What is it?
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[Rack](https://github.com/rack/rack) middleware to remove specific params from HTTP requests.
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## What does it do?
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Given a set of params and optional constraints, `rack-filter-param` will remove those params, then pass the request downstream.
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Removes params from:
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* GET querystring
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* POST params (x-www-form-urlencoded)
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* JSON or other params hitherto processed by [`ActionDispatch::ParamsParser`](http://api.rubyonrails.org/classes/ActionDispatch/ParamsParser.html)
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## Installation
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```ruby
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gem 'rack-filter-param', require: 'rack/filter_param'
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```
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## Usage
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In rackup file or `application.rb`, initialize `rack-filter-param` with a list of HTTP params you want filtered from requests.
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Strip a parameter named `client_id`:
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```ruby
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use Rack::FilterParam, :client_id
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```
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Strip a parameter named `client_id` from a specific path only:
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```ruby
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use Rack::FilterParam, { param: :client_id, path: '/oauth/tokens' }
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```
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Strip a parameter named `client_id` from a fuzzy path:
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```ruby
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use Rack::FilterParam, { param: :client_id, path: /\A\/oauth/ }
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```
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Strip a parameter named `client_id` based on arbitrary logic:
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```ruby
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use Rack::FilterParam, { param: :client_id, if: -> (value) { ... } }
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```
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To filter multiple parameters, an array of parameters or options hashes can also be passed.
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## Contributing
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Bug reports and pull requests are welcome on GitHub at https://github.com/rfwatson/rack-filter-param
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## License
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The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
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