Class: HealthCheck::HealthCheckController

Inherits:
ActionController::Base
  • Object
show all
Defined in:
lib/health_check/health_check_controller.rb

Instance Method Summary collapse

Instance Method Details

#index ⇒ Object 



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# File 'lib/health_check/health_check_controller.rb', line 10

def index
  last_modified = Time.now.utc
  max_age = HealthCheck.max_age
  if max_age > 1
    last_modified = Time.at((last_modified.to_f / max_age).floor * max_age).utc
  end
  public = (max_age > 1) && ! basic_auth_username
  if stale?(:last_modified => last_modified, :public => public)
    # Rails 4.0 doesn't have :plain, but it is deprecated later on
    plain_key = Rails.version < '4.1' ? :text : :plain
    checks = params[:checks] || 'standard'
    begin
      errors = HealthCheck::Utils.process_checks(checks)
    rescue Exception => e
      errors = e.message.blank? ? e.class.to_s : e.message.to_s
    end     
    response.headers['Cache-control'] = (public ? 'public' : 'private') + ', no-cache, must-revalidate' + (max_age > 0 ? ", max-age=#{max_age}" : '')
    if errors.blank?
      obj = { :healthy => true, :message => HealthCheck.success }
      respond_to do |format|
        format.html { render plain_key => HealthCheck.success, :content_type => 'text/plain' }
        format.json { render :json => obj }
        format.xml { render :xml => obj }
        format.any { render plain_key => HealthCheck.success, :content_type => 'text/plain' }
      end
    else
      msg = "health_check failed: #{errors}"
      obj = { :healthy => false, :message => msg }
      respond_to do |format|
        format.html { render plain_key => msg, :status => HealthCheck.http_status_for_error_text, :content_type => 'text/plain'  }
        format.json { render :json => obj, :status => HealthCheck.http_status_for_error_object}
        format.xml { render :xml => obj, :status => HealthCheck.http_status_for_error_object }
        format.any { render plain_key => msg, :status => HealthCheck.http_status_for_error_text, :content_type => 'text/plain'  }
      end
      # Log a single line as some uptime checkers only record that it failed, not the text returned
      if logger
        logger.info msg
      end
    end
  end
end