Add Rails 6 streaming test routes

Similar to the Rails 7 app, test these streaming responses for Rails 6.

Remove rack-mini-profiler, because the streaming won't work with it.

ruby/rails6-mysql/app/Gemfile

@@ -36,9 +36,6 @@ end
 group :development do
   # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
   gem 'web-console', '>= 4.1.0'
-  # Display performance information such as SQL time and flame graphs for each request in your browser.
-  # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
-  gem 'rack-mini-profiler', '~> 2.0'
   gem 'listen', '~> 3.3'
 end
 

ruby/rails6-mysql/app/Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: /integration
   specs:
-    appsignal (3.4.0)
+    appsignal (3.5.5)
       rack
 
 GEM
@@ -231,7 +231,7 @@ DEPENDENCIES
   webpacker (~> 5.0)
 
 RUBY VERSION
-   ruby 3.2.1p31
+   ruby 3.2.2p53
 
 BUNDLED WITH
-   2.4.11
+   2.5.6

ruby/rails6-mysql/app/app/controllers/tests_controller.rb

@@ -6,4 +6,39 @@ def error
   def slow
     sleep 3
   end
+
+  class StreamingSlowBody
+    def each
+      sleep 1
+      yield "1"
+      sleep 1
+      yield "2"
+      sleep 1
+      yield "3"
+      sleep 1
+      yield "4"
+    end
+  end
+
+  def streaming_slow
+    headers["Content-Length"] = "4"
+    headers["Last-Modified"] = Time.now.httpdate
+    self.response_body = StreamingSlowBody.new
+  end
+
+  class StreamingErrorBody
+    def each
+      yield "1"
+      sleep 0.5
+      yield "2"
+      yield "3"
+      raise "Rails error in streaming body"
+    end
+  end
+
+  def streaming_error_in_body
+    headers["Content-Length"] = "4"
+    headers["Last-Modified"] = Time.now.httpdate
+    self.response_body = StreamingErrorBody.new
+  end
 end

ruby/rails6-mysql/app/app/views/tests/index.html.erb

@@ -0,0 +1,9 @@
+<h1>Rails 6 mysql app</h1>
+
+<ul>
+  <li><%= link_to "Slow request", slow_path %></li>
+  <li><%= link_to "Error request", error_path %></li>
+  <li><%= link_to "Slow streaming request", streaming_slow_path %></li>
+  <li><%= link_to "Streaming request with error", streaming_error_path %></li>
+  <li><%= link_to "Posts: resources with queies", posts_path %></li>
+</ul>

ruby/rails6-mysql/app/config/routes.rb

@@ -1,6 +1,10 @@
 Rails.application.routes.draw do
   get "/slow", to: "tests#slow"
   get "/error", to: "tests#error"
+  get "/streaming/slow", to: "tests#streaming_slow"
+  get "/streaming/error", to: "tests#streaming_error_in_body"
 
   resources :posts, :except => %i[edit update destroy]
+
+  root to: "tests#index"
 end