Class: LivereloadRails::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/livereload_rails/middleware.rb

Constant Summary collapse

ASYNC_RESPONSE = 
[-1, {}, []]

Instance Method Summary collapse

Constructor Details

#initialize(app, assets:, matchers: LivereloadRails.matchers) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/livereload_rails/middleware.rb', line 9

def initialize(app, assets:, matchers: LivereloadRails.matchers)
  @app = app
  @clients = Set.new
  @clients.extend(MonitorMixin)

  assets.configure do |environment|
    @watcher = Watcher.new(LivereloadRails.paths.call(environment.paths), matchers: matchers) do |file|
      client_path = "#{assets.prefix}/#{file}"
      clients = @clients.synchronize { @clients.dup }

      LivereloadRails.logger.debug "Reloading #{clients.size} clients with #{client_path}."
      clients.each { |client| client.reload(client_path) }
    end

    @watcher_thread = Thread.new do
      Thread.current.abort_on_exception = true
      @watcher.run
    end
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/livereload_rails/middleware.rb', line 30

def call(env)
  if env["PATH_INFO"] == "/livereload"
    websocket = LivereloadRails::WebSocket.from_rack(env) do |ws|
      client = LivereloadRails::Client.new(ws)

      ws.on(:open) do
        @clients.synchronize { @clients.add(client) }
        LivereloadRails.logger.debug "#{client} joined: #{@clients.size}."
      end

      ws.on(:close) do
        @clients.synchronize { @clients.delete(client) }
        LivereloadRails.logger.debug "#{client} left: #{@clients.size}."
      end
    end

    if websocket
      ASYNC_RESPONSE
    else
      @app.call(env)
    end
  else
    @app.call(env)
  end
end