Class: Wildsight::Rack::TopMiddleware

Inherits:
Object
  • Object
show all
Defined in:
lib/wildsight/rack/top_middleware.rb

Constant Summary collapse

METRICS = 
[:middleware, :rails, :view, :database]
REQUEST_INCLUDE_KEYS = 
['SCRIPT_NAME', 'QUERY_STRING', 'PATH_INFO', 'REMOTE_ADDR']
REQUEST_EXCLUDE_KEYS = 
['HTTP_COOKIE']
RESPONSE_EXCLUDE_KEYS = 
['Set-Cookie']

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ TopMiddleware

Returns a new instance of TopMiddleware.



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# File 'lib/wildsight/rack/top_middleware.rb', line 12

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/wildsight/rack/top_middleware.rb', line 16

def call(env)
  context = Wildsight::Agent.default.context
  context.bind_thread

  context.data[:rack] ||= {
      request: {
          target: env['SCRIPT_NAME'].to_s + env['PATH_INFO'].to_s,
          headers: {}
      },
      response: {
      }
  }

  env.each_pair do |key,value|
    name = key.to_s
    context.data[:rack][:request][:headers][key] = value if REQUEST_INCLUDE_KEYS.include?(name)
    context.data[:rack][:request][:headers][key] = value if name.start_with?('HTTP_')
    context.data[:rack][:request][:headers][key] = value if name.start_with?('REQUEST_')
    context.data[:rack][:request][:headers][key] = value if name.start_with?('SERVER_')
  end

  env[Wildsight::Rack::RACK_ENV_KEY] = context

  response = context.profiler.duration(:request, nil, raw: true) {
    context.profiler.duration(:middleware) {
      @app.call(env)
    }
  }

  if !context.data[:session] && !env['rack.session'].nil? && env['rack.session'].respond_to?(:id)
    context.data[:session] ||= {id: env['rack.session'].id}
  end

  REQUEST_EXCLUDE_KEYS.each { |key| context.data[:rack][:request][:headers].delete(key) }

  if response
    context.data[:rack][:response][:code] ||= response[0]
    context.data[:rack][:response][:headers] ||= response[1].dup
    RESPONSE_EXCLUDE_KEYS.each { |key| context.data[:rack][:response][:headers].delete(key) }
  end

  values = {}
  context.profiler.data.keys.each do |key|
    values[key] = context.profiler.data[key][:duration]
  end

  context.event(:action_controller, context.data[:rack], values)

  return response
ensure
  env.delete(Wildsight::Rack::RACK_ENV_KEY)
  context.release_thread
  context.unregister
end