Class: Rack::AI::Features::RateLimiting

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/ai/features/rate_limiting.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(provider, config) ⇒ RateLimiting

Returns a new instance of RateLimiting.



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# File 'lib/rack/ai/features/rate_limiting.rb', line 9

def initialize(provider, config)
  @name = :rate_limiting
  @provider = provider
  @config = config
  @rate_store = {}
  @cleanup_timer = Time.now
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/rack/ai/features/rate_limiting.rb', line 7

def config
  @config
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/rack/ai/features/rate_limiting.rb', line 7

def name
  @name
end

#provider ⇒ Object (readonly)

Returns the value of attribute provider.



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# File 'lib/rack/ai/features/rate_limiting.rb', line 7

def provider
  @provider
end

Instance Method Details

#enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/ai/features/rate_limiting.rb', line 17

def enabled?
  @config.feature_enabled?(:rate_limiting)
end

#process_request(env) ⇒ Object 



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# File 'lib/rack/ai/features/rate_limiting.rb', line 25

def process_request(env)
  client_ip = get_client_ip(env)
  current_time = Time.now
  
  # Cleanup old entries every 5 minutes
  cleanup_old_entries if current_time - @cleanup_timer > 300
  
  # Get rate limit settings
  window_size = @config.rate_limiting.window_size || 3600 # 1 hour default
  max_requests = @config.rate_limiting.max_requests || 1000 # 1000 requests default
  
  # Initialize client data if not exists
  @rate_store[client_ip] ||= { requests: [], blocked_until: nil }
  client_data = @rate_store[client_ip]
  
  # Check if client is currently blocked
  if client_data[:blocked_until] && current_time < client_data[:blocked_until]
    return {
      action: :block,
      reason: "Rate limit exceeded - blocked until #{client_data[:blocked_until]}",
      status: 429,
      feature: :rate_limiting,
      timestamp: current_time.iso8601,
      retry_after: (client_data[:blocked_until] - current_time).to_i
    }
  end
  
  # Remove old requests outside the window
  window_start = current_time - window_size
  client_data[:requests].reject! { |timestamp| timestamp < window_start }
  
  # Check if rate limit is exceeded
  if client_data[:requests].length >= max_requests
    block_duration = @config.rate_limiting.block_duration || 3600 # 1 hour default
    client_data[:blocked_until] = current_time + block_duration
    
    return {
      action: :block,
      reason: "Rate limit exceeded: #{client_data[:requests].length}/#{max_requests} requests in #{window_size}s",
      status: 429,
      feature: :rate_limiting,
      timestamp: current_time.iso8601,
      retry_after: block_duration,
      requests_count: client_data[:requests].length,
      window_size: window_size
    }
  end
  
  # Add current request
  client_data[:requests] << current_time
  
  {
    action: :allow,
    feature: :rate_limiting,
    timestamp: current_time.iso8601,
    requests_count: client_data[:requests].length,
    requests_remaining: max_requests - client_data[:requests].length,
    window_size: window_size,
    reset_time: (window_start + window_size).iso8601
  }
end

#process_response? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/ai/features/rate_limiting.rb', line 21

def process_response?
  false
end