gitlab-org--gitlab-foss/app/controllers/metrics_controller.rb

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class MetricsController < ActionController::Base
include RequiresWhitelistedMonitoringClient
protect_from_forgery with: :exception
before_action :validate_prometheus_metrics
def index
render text: metrics_service.metrics_text, content_type: 'text/plain; version=0.0.4'
end
private
def metrics_service
@metrics_service ||= MetricsService.new
end
def validate_prometheus_metrics
render_404 unless Gitlab::Metrics.prometheus_metrics_enabled?
end
end