discourse/spec/components/middleware/request_tracker_spec.rb

require "rails_helper"
require_dependency "middleware/request_tracker"

describe Middleware::RequestTracker do

  def env(opts = {})
    {
      "HTTP_HOST" => "http://test.com",
      "REQUEST_URI" => "/path?bla=1",
      "REQUEST_METHOD" => "GET",
      "rack.input" => ""
    }.merge(opts)
  end

  context "log_request" do
    before do
      freeze_time Time.now
      ApplicationRequest.clear_cache!
    end

    def log_tracked_view(val)
      data = Middleware::RequestTracker.get_data(env(
        "HTTP_DISCOURSE_TRACK_VIEW" => val
      ), ["200", { "Content-Type" => 'text/html' }], 0.2)

      Middleware::RequestTracker.log_request(data)
    end

    it "can exclude/include based on custom header" do
      log_tracked_view("true")
      log_tracked_view("1")
      log_tracked_view("false")
      log_tracked_view("0")
      ApplicationRequest.write_cache!

      expect(ApplicationRequest.page_view_anon.first.count).to eq(2)
    end

    it "can log requests correctly" do

      data = Middleware::RequestTracker.get_data(env(
        "HTTP_USER_AGENT" => "AdsBot-Google (+http://www.google.com/adsbot.html)"
      ), ["200", { "Content-Type" => 'text/html' }], 0.1)

      Middleware::RequestTracker.log_request(data)

      data = Middleware::RequestTracker.get_data(env(
        "HTTP_DISCOURSE_TRACK_VIEW" => "1"
      ), ["200", {}], 0.1)

      Middleware::RequestTracker.log_request(data)

      data = Middleware::RequestTracker.get_data(env(
        "HTTP_USER_AGENT" => "Mozilla/5.0 (iPhone; CPU iPhone OS 8_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B410 Safari/600.1.4"
      ), ["200", { "Content-Type" => 'text/html' }], 0.1)

      Middleware::RequestTracker.log_request(data)

      ApplicationRequest.write_cache!

      expect(ApplicationRequest.http_total.first.count).to eq(3)
      expect(ApplicationRequest.http_2xx.first.count).to eq(3)

      expect(ApplicationRequest.page_view_anon.first.count).to eq(2)
      expect(ApplicationRequest.page_view_crawler.first.count).to eq(1)
      expect(ApplicationRequest.page_view_anon_mobile.first.count).to eq(1)
    end

  end

  context "callbacks" do
    def app(result, sql_calls: 0, redis_calls: 0)
      lambda do |env|
        sql_calls.times do
          User.where(id: -100).first
        end
        redis_calls.times do
          $redis.get("x")
        end
        result
      end
    end

    let :logger do
      ->(env, data) do
        @env = env
        @data = data
      end
    end

    before do
      Middleware::RequestTracker.register_detailed_request_logger(logger)
    end

    after do
      Middleware::RequestTracker.register_detailed_request_logger(logger)
    end

    it "can correctly log detailed data" do
      tracker = Middleware::RequestTracker.new(app([200, {}, []], sql_calls: 2, redis_calls: 2))
      tracker.call(env)

      timing = @data[:timing]
      expect(timing[:total_duration]).to be > 0

      expect(timing[:sql][:duration]).to be > 0
      expect(timing[:sql][:calls]).to eq 2

      expect(timing[:redis][:duration]).to be > 0
      expect(timing[:redis][:calls]).to eq 2
    end
  end
end