Method: NewRelic::Rack::BrowserMonitoring#traced_call

Defined in:
lib/new_relic/rack/browser_monitoring.rb

#traced_call(env) ⇒ Object 



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# File 'lib/new_relic/rack/browser_monitoring.rb', line 37

def traced_call(env)
  result = @app.call(env)
  (status, headers, response) = result

  js_to_inject = NewRelic::Agent.browser_timing_header(nonce(env))
  if (js_to_inject != NewRelic::EMPTY_STR) && should_instrument?(env, status, headers)
    response_string = autoinstrument_source(response, js_to_inject)
    if headers.key?(CONTENT_LENGTH)
      content_length = response_string ? response_string.bytesize : 0
      headers[CONTENT_LENGTH] = content_length.to_s
    end

    env[ALREADY_INSTRUMENTED_KEY] = true
    if response_string
      response = ::Rack::Response.new(response_string, status, headers)
      response.finish
    else
      result
    end
  else
    result
  end
end