Class: Flipper::Cloud::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/flipper/cloud/middleware.rb

Constant Summary collapse

WEBHOOK_PATH =

Internal: The path to match for webhook requests.

%r{\A/webhooks\/?\Z}
ROOT_PATH =

Internal: The root path to match for requests.

%r{\A/\Z}

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/flipper/cloud/middleware.rb', line 13

def initialize(app, options = {})
  @app = app
  @env_key = options.fetch(:env_key, 'flipper')
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/flipper/cloud/middleware.rb', line 18

def call(env)
  dup.call!(env)
end

#call!(env) ⇒ Object 



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# File 'lib/flipper/cloud/middleware.rb', line 22

def call!(env)
  request = Rack::Request.new(env)
  if request.post? && (request.path_info.match(ROOT_PATH) || request.path_info.match(WEBHOOK_PATH))
    status = 200
    headers = {
      Rack::CONTENT_TYPE => "application/json",
    }
    body = "{}"
    payload = request.body.read
    signature = request.env["HTTP_FLIPPER_CLOUD_SIGNATURE"]
    flipper = env.fetch(@env_key)

    begin
      message_verifier = MessageVerifier.new(secret: flipper.sync_secret)
      if message_verifier.verify(payload, signature)
        begin
          flipper.sync
          body = JSON.generate({
            groups: Flipper.group_names.map { |name| {name: name}}
          })
        rescue Flipper::Adapters::Http::Error => error
          status = error.response.code.to_i == 402 ? 402 : 500
          headers["flipper-cloud-response-error-class"] = error.class.name
          headers["flipper-cloud-response-error-message"] = error.message
        rescue => error
          status = 500
          headers["flipper-cloud-response-error-class"] = error.class.name
          headers["flipper-cloud-response-error-message"] = error.message
        end
      end
    rescue MessageVerifier::InvalidSignature
      status = 400
    end

    [status, headers, [body]]
  else
    @app.call(env)
  end
end