Step 3: Add adaptive streaming

app/controllers/items_controller.rb

@@ -1,5 +1,5 @@
 class ItemsController < ApplicationController
-  before_action :set_item, only: [:show, :edit, :update, :destroy]
+  before_action :set_item, only: [:show, :edit, :update, :destroy, :adaptive]
   before_action :require_login, except: [:index, :authorize]
 
   def require_login
@@ -81,6 +81,12 @@ def authorize
     end
   end
 
+  # GET /items/1/adaptive.m3u8
+  def adaptive
+    @streams = @item.streams
+    render layout: false, content_type: 'text/plain'
+  end
+
   private
     # Use callbacks to share common setup or constraints between actions.
     def set_item

app/views/items/adaptive.erb

@@ -0,0 +1,5 @@
+#EXTM3U
+<% @streams.each do |stream| %>
+#EXT-X-STREAM-INF:BANDWIDTH=<%= stream["bitrate"] %>
+<%= stream["url"] + "?token=" + session[:token]%>
+<% end %>

app/views/items/show.html.erb

@@ -22,6 +22,7 @@
     controls
     preload="auto"
   >
+    <source src="<%= adaptive_item_path(@item, format: "m3u8") %>" type="application/x-mpegURL" label="auto"/>
     <% @item.streams.each do |stream| %>
       <source src="<%= stream["url"] %>?token=<%= session[:token] %>" type="application/x-mpegURL" label="<%= stream["label"] %>"/>
     <% end %>

config/routes.rb

@@ -3,6 +3,9 @@
     collection do
       get :authorize
     end
+    member do
+      match 'adaptive', to: 'items#adaptive', via: [:get]
+    end
   end
   devise_for :users
   root to: "items#index"