Rails 5 ActionCable on Heroku uninitialized constant NameError - ruby-on-rails

Question

I'm aware of the fact that Heroku only allows 2 ports, i.e. 80 and 443 for connection, which is why you need to run a separate server for WebSockets. I came across this guide which claims to allow you to run both processes on the same server. I also changed the line:
if Faye::WebSocket.websocket?(env) to:
::WebSocket::Driver.websocket?(env) as per a comment by a user, since I'm not using Faye.
However, I get the error uninitialized constant ChatActionCable (NameError). I tried the guide on this page, yet no gain.
My application.rb file looks like this:
require_relative 'boot'
require 'rails/all'
module Third
class Application < Rails::Application
config.autoload_paths += %W(#{config.root}/lib)
end
end
TIA.
Update: The problem with the guide was the name of the middleware file. I changed it to chat_action_cable.rb and at least the middleware starts to run. Now the problem lies with ::WebSocket::Driver.websocket?(env) line as Uninitialized constant, NameError.

Answer 1

I believe the examples online are incomplete.
Your middleware should inherit from ActionCable::Connection::WebSocket
class ChatActionCable < ActionCable::Connection::WebSocket
def initialize(app, options={})
#app = app
end
def call(env)
if ::WebSocket::Driver.websocket?(env)
ActionCable.server.call(env)
else
#app.call(env)
end
end
end
For people looking how to setup ActionCable with Heroku, here is a step by step guide :
Create the middleware file :
/app/middleware/chat_action_cable.rb
class ChatActionCable < ActionCable::Connection::WebSocket
def initialize(app, options={})
#app = app
end
def call(env)
if ::WebSocket::Driver.websocket?(env)
ActionCable.server.call(env)
else
#app.call(env)
end
end
end
Set it up in config :
/config/environments/production.rb
config.middleware.use ChatActionCable
config.web_socket_server_url = "wss://your-heroku-app.herokuapp.com/"
Set redis plugin on heroku (it should already be included) :
heroku plugins:install heroku-redis (in case)
Create a new redis heroku instance :
heroku addons:create heroku-redis:hobby-dev -a young-home-19338
(replace young-home-19338 with your instance name)
It will set a REDIS_URL env, you can grab it with :
heroku config | grep REDIS
Now, set the config for actionCable :
/config/cable.yml
development: &development
:url: redis://localhost:6379
:host: localhost
:port: 6379
:timeout: 1
:inline: true
test: *development
production: &production
:url: redis://redistogo:192csd9c30ca49585ce9d85daf0fer90#tarpon.redistogo.com:49382
:host: tarpon.redistogo.com
:port: 49382
:password: 349f93483fv9erfv849dfvdfbds9
:inline: true
:timeout: 1
The host is between # and :
The port is after :
The password :
heroku run rails c
uri = URI.parse(<your redis URL>)
uri.password
That should be all.
I used these two articles as reference :
http://www.thegreatcodeadventure.com/deploying-action-cable-to-heroku/
https://blog.heroku.com/real_time_rails_implementing_websockets_in_rails_5_with_action_cable