Module: AnyCable::Rails::Rack

Defined in:
lib/anycable/rails/rack.rb

Overview

Rack middleware stack to modify the HTTP request object.

AnyCable Websocket server does not use Rack middleware processing mechanism (which Rails uses when Action Cable is mounted into the main app).

Some middlewares could enhance request env with useful information.

For instance, consider the Rails session middleware: it’s responsible for restoring the session data from cookies.

AnyCable adds session middleware by default to its own stack.

You can also use any Rack/Rails middleware you want. For example, to enable CustomMiddleware you can add the following code to an initializer or any other configuration file:

AnyCable::Rails::Rack.middleware.use CustomMiddleware

Class Method Summary collapse

Class Method Details

.app ⇒ Object 



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# File 'lib/anycable/rails/rack.rb', line 43

def self.app
  @rack_app || app_build_lock.synchronize do
    @rack_app ||= default_middleware_stack.yield_self do |stack|
                    middleware.merge_into(stack)
                  end.yield_self do |stack|
      stack.build { [-1, {}, []] }
    end
  end
end

.app_build_lock ⇒ Object 



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# File 'lib/anycable/rails/rack.rb', line 25

def self.app_build_lock
  @app_build_lock
end

.default_middleware_stack ⇒ Object 



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# File 'lib/anycable/rails/rack.rb', line 35

def self.default_middleware_stack
  config = ::Rails.application.config

  ActionDispatch::MiddlewareStack.new do |middleware|
    middleware.use(config.session_store, config.session_options) if config.session_store
  end
end

.middleware ⇒ Object 



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# File 'lib/anycable/rails/rack.rb', line 31

def self.middleware
  @middleware ||= ::Rails::Configuration::MiddlewareStackProxy.new
end