ДЗ 5

.gitignore

@@ -35,11 +35,12 @@ latest.dump
 .gitdocs_build/
 
 # Ignore application configuration
-/config/application.yml
+config/application.yml
+config/database.yml
+config/secrets.yml
 /public/packs
 /public/packs-test
 /node_modules
-config/database.yml
 
 # Ignore storybook static site generation
 storybook-static/
@@ -48,8 +49,10 @@ yarn-error.log
 # Ignore package-lock.json because we use yarn
 package-lock.json
 
-#Jetbrains Tools
 .idea/
+.vscode
 
 #sitemap
-/public/sitemap.xml.gz
+/public/sitemap.xml.gz
+
+sitespeed-result/

.ruby-gemset

@@ -0,0 +1 @@
+thinknetica

.ruby-version

@@ -1 +1 @@
-2.6.1
+ruby-2.6.1

Gemfile

@@ -16,7 +16,8 @@ end
 gem "actionpack-action_caching", "~> 1.2"
 gem "active_record_union", "~> 1.3"
 gem "acts-as-taggable-on", "~> 5.0"
-gem "acts_as_follower", github: "thepracticaldev/acts_as_follower", branch: "master"
+# gem "acts_as_follower", github: "thepracticaldev/acts_as_follower", branch: "master"
+gem 'acts_as_follower', github: 'tcocca/acts_as_follower', branch: 'master'
 gem "addressable", "~> 2.5", ">= 2.5.2"
 gem "administrate", "~> 0.11"
 gem "ahoy_email", "~> 0.5"
@@ -117,12 +118,13 @@ group :development do
   gem "web-console", "~> 3.7"
 end
 
-group :development, :test do
+group :development, :local_production, :test do
   gem "capybara", "~> 3.13"
   gem "derailed", "~> 0.1"
   gem "erb_lint", "~> 0.0", require: false
   gem "faker", git: "https://github.com/stympy/faker.git", branch: "master"
-  gem "fix-db-schema-conflicts", github: "thepracticaldev/fix-db-schema-conflicts", branch: "master"
+  # gem "fix-db-schema-conflicts", github: "thepracticaldev/fix-db-schema-conflicts", branch: "master"
+  gem "fix-db-schema-conflicts"
   gem "memory_profiler", "~> 0.9"
   gem "parallel_tests", "~> 2.27"
   gem "pry-byebug", "~> 3.7"

Gemfile.lock

@@ -7,21 +7,13 @@ GIT
       i18n (>= 0.7)
 
 GIT
-  remote: https://github.com/thepracticaldev/acts_as_follower.git
-  revision: 288690cd99bc470eaee493fce5bfa9fe23157692
+  remote: https://github.com/tcocca/acts_as_follower.git
+  revision: c5ac7b9601c4af01eb4d9112330b27be4d694ecc
   branch: master
   specs:
     acts_as_follower (0.2.1)
       activerecord (>= 4.0)
 
-GIT
-  remote: https://github.com/thepracticaldev/fix-db-schema-conflicts.git
-  revision: 4172392392e1a8d907f7ab673cb5ddd9a4a31940
-  branch: master
-  specs:
-    fix-db-schema-conflicts (3.0.2)
-      rubocop (>= 0.38.0)
-
 GEM
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
@@ -322,6 +314,8 @@ GEM
       thor (~> 0.14)
     fission (0.5.0)
       CFPropertyList (~> 2.2)
+    fix-db-schema-conflicts (3.1.0)
+      rubocop (>= 0.38.0)
     fog (1.41.0)
       fog-aliyun (>= 0.1.0)
       fog-atmos
@@ -992,7 +986,7 @@ DEPENDENCIES
   fastly-rails (~> 0.8)
   feedjira (~> 2.2)
   figaro (~> 1.1)
-  fix-db-schema-conflicts!
+  fix-db-schema-conflicts
   fog (~> 1.41)
   front_matter_parser (~> 0.2)
   gemoji (~> 3.0.0)

Procfile.locprod

@@ -0,0 +1,4 @@
+web: bin/rails s -p 3000
+webpacker: ./bin/webpack-dev-server
+job: bin/rake jobs:work
+# prometheus_exporter: bundle exec prometheus_exporter

app/controllers/stories_controller.rb

@@ -7,6 +7,18 @@ def index
     return handle_user_or_organization_or_podcast_index if params[:username]
     return handle_tag_index if params[:tag]
 
+    push_headers = [
+      "<#{view_context.asset_path('bell.svg')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('menu.svg')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('connect.svg')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('stack.svg')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('lightning.svg')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('devplain.svg')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('sloan.png')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('twitter-logo.svg')}>; rel=preload; as=image",
+      "<#{view_context.asset_path('github-logo.svg')}>; rel=preload; as=image",
+    ]
+    response.headers["Link"] = push_headers.join(", ")
     handle_base_index
   end
 

app/views/layouts/_top_bar.html.erb

@@ -3,7 +3,7 @@
 <div class="top-bar" id="top-bar">
   <nav>
     <a href="#articles-list" class="skip-content-link">Skip to content</a>
-    <a href="/" class="logo-link" id="logo-link" aria-label="DEV Home"><%= inline_svg("devplain.svg", class: "logo", size: "20% * 20%") %></a>
+    <a href="/" class="logo-link" id="logo-link" aria-label="DEV Home"><%= image_tag("devplain.svg", class: "logo", size: "20% * 20%") %></a>
     <div id="nav-search-form-root">
       <div class="nav-search-form">
         <form acceptCharset="UTF-8" method="get">
@@ -13,19 +13,19 @@
     </div>
     <a href="/new" id="write-link" class="cta nav-link write">WRITE A POST</a>
     <a href="/connect" id="connect-link" class="nav-link connect-icon" aria-label="Connect">
-      <%= inline_svg("connect.svg", size: "100% * 100%") %>
+      <%= image_tag("connect.svg", size: "100% * 100%") %>
       <div class="connect-number" id="connect-number"></div>
     </a>
     <a href="/notifications" id="notifications-link" class="nav-link notifications-icon" aria-label="Notifications">
-      <%= inline_svg("bell.svg", size: "100% * 100%") %>
+      <%= image_tag("bell.svg", size: "100% * 100%") %>
       <div class="notifications-number" id="notifications-number"></div>
     </a>
     <div class="navbar-menu-wrapper" id="navbar-menu-wrapper">
       <button class="navigation-butt" id="navigation-butt" aria-label="Navigation">
         <% if user_signed_in? %>
           <div class="nav-profile-image-wrapper"><img alt="" class="nav-profile-image" id="nav-profile-image" /></div>
         <% else %>
-          <%= inline_svg("menu.svg", class: "bars", size: "20% * 20%") %>
+          <%= image_tag("menu.svg", class: "bars", size: "20% * 20%") %>
         <% end %>
       </button>
       <div class="menubg" id="menubg"></div>

bin/setup

@@ -33,6 +33,7 @@ chdir APP_ROOT do
   # This solution was found here https://github.com/rails/rails/issues/26731#issuecomment-302446525
   # This line is to remove manual need to run a separate manual migration upon calling rspec
   system! "RAILS_ENV=test bin/rails db:environment:set"
+  system! "RAILS_ENV=local_production bin/rails db:environment:set"
 
   puts "\n== Removing old logs and tempfiles =="
   system! "bin/rails log:clear tmp:clear"

bin/startup_local_production

@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+require "pathname"
+require "fileutils"
+include FileUtils
+
+# path to your application root.
+APP_ROOT = Pathname.new File.expand_path("..", __dir__)
+ENV["RAILS_ENV"] = 'local_production'
+
+def system!(*args)
+  system(*args) || abort("\n== Command #{args} failed ==")
+end
+
+chdir APP_ROOT do
+  puts "== STARTING UP =="
+  system! "bundle exec rake assets:precompile"
+  system! "foreman start -f Procfile.locprod"
+end

case-study.md

@@ -0,0 +1,16 @@
+## Подготовка
+
+- [x] Настройка окружения `local_production`
+- [x] Настройка сертификата для локального HTTPS с использованием `mkcert`
+- [x] Настройка NGinx как reverse-proxy
+- [x] Настройка HTTP/2 и server-push
+
+## Измерение эффекта сделанных изменений
+
+### Анализ версии без server-push
+
+![alt text](browsertime_wo_push.png 'Browser time without push')
+
+### Анализ с server-push
+
+![alt text](browsertime_w_push.png 'Browser time with push')

config/environments/local_production.rb

@@ -0,0 +1,54 @@
+# rubocop:disable Metrics/BlockLength
+#
+def yarn_integrity_enabled?
+  ENV.fetch("YARN_INTEGRITY_ENABLED", "true") == "true"
+end
+
+Rails.application.configure do
+  config.webpacker.check_yarn_integrity = false
+  config.cache_classes = true
+  config.eager_load = true
+  config.consider_all_requests_local = false
+  config.action_controller.perform_caching = true
+  config.cache_store = :memory_store
+  config.public_file_server.enabled = true
+  config.public_file_server.headers = {
+    "Cache-Control" => "public, max-age=172800"
+  }
+  config.assets.js_compressor = Uglifier.new(harmony: true)
+  config.action_mailer.raise_delivery_errors = false
+  config.active_support.deprecation = :log
+  config.active_record.migration_error = :page_load
+  config.assets.compile = true
+  config.assets.debug = false
+  config.assets.digest = true
+  config.assets.quiet = true
+  config.assets.raise_runtime_errors = true
+  config.log_formatter = ::Logger::Formatter.new
+  if ENV["RAILS_LOG_TO_STDOUT"].present?
+    logger           = ActiveSupport::Logger.new(STDOUT)
+    logger.formatter = config.log_formatter
+    config.logger = ActiveSupport::TaggedLogging.new(logger)
+  end
+  config.action_mailer.perform_caching = false
+  config.app_domain = "localhost:3000"
+  config.action_mailer.default_url_options = { host: "localhost:3000" }
+  config.action_mailer.delivery_method = :smtp
+  config.action_mailer.perform_deliveries = true
+  config.action_mailer.default_url_options = { host: config.app_domain }
+  config.action_mailer.smtp_settings = {
+    address: "smtp.gmail.com",
+    port: "587",
+    enable_starttls_auto: true,
+    user_name: '<%= ENV["DEVELOPMENT_EMAIL_USERNAME"] %>',
+    password: '<%= ENV["DEVELOPMENT_EMAIL_PASSWORD"] %>',
+    authentication: :plain,
+    domain: "localhost:3000"
+  }
+  config.action_mailer.preview_path = "#{Rails.root}/spec/mailers/previews"
+  config.log_level = :debug
+  config.log_tags = [:request_id]
+  config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+end
+
+# rubocop:enable Metrics/BlockLength

config/initializers/airbrake.rb

@@ -41,7 +41,7 @@
   # environments.
   # NOTE: This option *does not* work if you don't set the 'environment' option.
   # https://github.com/airbrake/airbrake-ruby#ignore_environments
-  c.ignore_environments = %w[test development]
+  c.ignore_environments = %w[test development local_production]
 
   # A list of parameters that should be filtered out of what is sent to
   # Airbrake. By default, all "password" attributes will have their contents

config/initializers/carrierwave.rb

@@ -3,7 +3,7 @@
 require "carrierwave/storage/fog"
 
 CarrierWave.configure do |config|
-  if Rails.env.development? || Rails.env.test?
+  if Rails.env.development? || Rails.env.test? || Rails.env.local_production?
     config.storage = :file
   else
     # config.fog_provider = 'fog-aws'

config/initializers/timeout.rb

@@ -1,4 +1,4 @@
-if Rails.env.development? && ENV["RACK_TIMEOUT_WAIT_TIMEOUT"].nil?
+if (Rails.env.development? || Rails.env.local_production?) && ENV["RACK_TIMEOUT_WAIT_TIMEOUT"].nil?
   ENV["RACK_TIMEOUT_WAIT_TIMEOUT"] = "100000"
   ENV["RACK_TIMEOUT_SERVICE_TIMEOUT"] = "100000"
 end

config/secrets.yml

@@ -22,3 +22,5 @@ test:
 production:
   secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
 
+local_production:
+  secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>