From action cable documentation I read this example for setting current_user:
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = find_verified_user
end
private
def find_verified_user
if verified_user = User.find_by(id: cookies.signed[:user_id])
verified_user
else
reject_unauthorized_connection
end
end
end
end
I don't have user_id cookie set because authentication is made for a cas server, and it store session in Active Record.
How tell to Connection class the current user?
You need to force the session to load. Check this link here (worked for me): How force that session is loaded?
Related
So I am trying to implement dervise-jwt in a Rails 5.2 application. My login is working properly, and the tokens are being created. That being said, I want to access that same current_user from my ActionCable. Following some online tutorials, my app/channels/application_cable/connection.rb looks like this:
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = find_verified_user
end
private
def find_verified_user
if user == env['warden'].user
user
else
reject_unauthorized_connection
end
end
end
end
When I debug the code, env['warden'].user is nil. What do I have to do to get the current_user accessible via warden?
I develop a Ruby on Rails 5.1 application using ActionCable. User authentification via Devise works fine for several channels. Now, I want to add a second type of channels which does not require any user authentification. More precisely, I would like to enable anonymous website visitors to chat with support staff.
My current implementation of ApplicationCable::Connection for authenticated users looks like this:
# app/channels/application_cable/connection.rb
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = find_verified_user
end
protected
def find_verified_user
user = User.find_by(id: cookies.signed['user.id'])
return user if user
fail 'User needs to be authenticated.'
end
end
end
Anonymous users will be identified by some random UUID (SecureRandom.urlsafe_base64).
Question:
How do I best add this new type of channels? Could I add a boolean flag require_authentification somewhere, override it in my inherited channel class for anonymous communication, and switch the identification method in Connection depending on this attribute? Or would I rather have to implement a completely new module, say AnonymousApplicationCable?
Hi I came into the same problem, after looking at your solution in rails github comment, I assume it is better to create the token and keep the logic in the connect method.
So what I do was just utillize the the warden checking and if it is nil just create the anonymous token and otherwise. For this to work, I need to declare 2 identifier :uuid and :current_user
class Connection < ActionCable::Connection::Base
identified_by :current_user, :uuid
def connect
if !env['warden'].user
self.uuid = SecureRandom.urlsafe_base64
else
self.current_user = find_verified_user
end
end
protected
def find_verified_user # this checks whether a user is authenticated with devise
if verified_user = env['warden'].user
verified_user
else
reject_unauthorized_connection
end
end
end
I'm trying to make current_user available in my channel actions.. This is the first time I'm diving into ActionCable and the tutorial I'm following is using Devise and I am not..
In channels/application_cable/connection.rb. They have
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = find_verified_user
logger.add_tags 'ActionCable', current_user.email
end
protected
def find_verified_user # this checks whether a user is authenticated with devise
if verified_user = env['warden'].user
verified_user
else
reject_unauthorized_connection
end
end
end
end
I'm having trouble with the protected method. I'm not sure how to verify the user from this file using bcrypt.. Also the directory this file is under seems to be likened to helpers for ActionCable, am I correct in thinking this?
I made a basic chat with ActionCable authenticated with devise.
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = find_verified_user
logger.add_tags 'ActionCable', current_user.email
end
protected
def find_verified_user # this checks whether a user is authenticated with devise
if verified_user = env['warden'].user
verified_user
else
reject_unauthorized_connection
end
end
end
end
But when the user has an open chat and it rejects the connection (because the users have logged out), I need to show a login screen.
The problem is that on the frontend I can't get the reason for the disconnection.
How can I send reject with params, like "unauthorized"?
def find_verified_user # this checks whether a user is authenticated with devise
if verified_user = env['warden'].user
verified_user
else
message = "The user is not found. Connection rejected."
logger.add_tags 'ActionCable', message # to console
self.transmit error: message # this is what you wanted
reject_unauthorized_connection
end
end
See also: How to terminate subscription to an actioncable channel from server?
I'm working on a new Rails 5 (RC1) app. I used AuthLogic for user authentication, and it works great as always, until I got to ActionCable.
#app/channels/application_cable/connection.rb
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = UserSession.find
end
end
end
I get the error: You must activate the Authlogic::Session::Base.controller with a controller object before creating objects
I tried:
Authlogic::Session::Base.controller = Authlogic::ControllerAdapters::RailsAdapter.new(self)
But that does not work because the Connection class is not a Controller.
I look at the AuthLogic code, but I can't figure out how to bypass its dependence on a controller object. I just need to load the user's session. Any thoughts?
I figured it out on my own. I feel it is sort of hacky, basically in my ApplicationController I set a secure cookie with the AuthLogic persistence_token, then I can read this token and manually load the user in ActionCable.
class ApplicationController < ActionController::Base
before_action :set_verify_cookie
def set_verify_cookie
#action cable needs a way outside of controller logic to lookup a user
return unless current_user
cookies.signed[:vvc] = current_user.persistence_token
end
end
#app/channels/connection.rb
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = find_verified_user
logger.add_tags 'ActionCable', self.current_user.username unless self.current_user.nil?
end
protected
def find_verified_user_or_guest
User.find_by(:persistence_token => cookies.signed[:vvc])
end
end
One potential gotch, the cookie needs to be cleared on logout or ActionCable will still find the user on subsequent page loads.
#app/controllers/user_sessions_controller.rb
class UserSessionsController < ApplicationController
def destroy
cookies.signed[:vvc] = nil
current_user_session.destroy
flash[:success] = "Logout successful!"
redirect_to root_url
end
end
Assuming you're using Authlogic default, the persistence token is stored in the cookie under the key 'user_credentials'.
So you can lookup your user like this:
# app/channels/application_cable/connection.rb
module ApplicationCable
class Connection < ActionCable::Connection::Base
def connect
verify_user
end
private
def verify_user
reject_unauthorized_connection unless verified_user?
end
def verified_user?
cookie_key && User.find_by_persistence_token(token)
end
def token
cookie && cookie.include?('::') && cookie.split("::")[0]
end
def cookie
cookies['user_credentials']
end
end
end