Class: Mnemosyne::Middleware::Rack

Inherits:
Object
  • Object
show all
Defined in:
lib/mnemosyne/middleware/rack.rb

Defined Under Namespace

Classes: Proxy

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Rack

Returns a new instance of Rack.



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# File 'lib/mnemosyne/middleware/rack.rb', line 62

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/mnemosyne/middleware/rack.rb', line 66

def call(env)
  origin      = env.fetch('HTTP_X_MNEMOSYNE_ORIGIN', false)
  transaction = env.fetch('HTTP_X_MNEMOSYNE_TRANSACTION') do
    ::SecureRandom.uuid
  end

  trace = ::Mnemosyne::Instrumenter.trace 'app.web.request.rack',
    transaction: transaction,
    origin: origin

  if trace
    trace.start!

    scan_request(trace, env)

    response = @app.call env

    scan_response(trace, response)

    response[2] = Proxy.new(response[2], trace)
    response
  else
    @app.call env
  end
rescue StandardError, LoadError, SyntaxError => e
  if trace
    trace.attach_error(e)
    trace.submit
  end

  raise
ensure
  trace&.release
end