Class: Narou::PushServer

Inherits:
Object
  • Object
show all
Includes:
Eventable, Singleton
Defined in:
lib/web/pushserver.rb

Constant Summary collapse

HISTORY_SAVED_COUNT =

保存する履歴の数

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Constants included from Eventable

Eventable::EVENTS_CONTAINER

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Eventable

#add_event_listener, included, #one, #remove_event_listener, #trigger_event

Constructor Details

#initialize ⇒ PushServer

Returns a new instance of PushServer.



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# File 'lib/web/pushserver.rb', line 25

def initialize
  @accepted_domains = ["*"]
  @port = 31000
  @connections = []
  clear_history
end

Instance Attribute Details

#accepted_domains ⇒ Object

Returns the value of attribute accepted_domains.



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# File 'lib/web/pushserver.rb', line 19

def accepted_domains
  @accepted_domains
end

#connections ⇒ Object (readonly)

Returns the value of attribute connections.



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# File 'lib/web/pushserver.rb', line 19

def connections
  @connections
end

#host ⇒ Object

Returns the value of attribute host.



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# File 'lib/web/pushserver.rb', line 18

def host
  @host
end

#port ⇒ Object

Returns the value of attribute port.



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# File 'lib/web/pushserver.rb', line 18

def port
  @port
end

Instance Method Details

#clear_history ⇒ Object 



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# File 'lib/web/pushserver.rb', line 81

def clear_history
  @history = [nil] * HISTORY_SAVED_COUNT
  # Sinatra で get "/" { clear_history } とかやった場合に [nil,nil...] な配列データが
  # 渡されないようにするため（配列は Sinatra にとって特別なデータ）
  true
end

#quit ⇒ Object

PushServer を停止させる



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# File 'lib/web/pushserver.rb', line 77

def quit
  @server.quit
end

#run ⇒ Object 



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# File 'lib/web/pushserver.rb', line 32

def run
  @server = WebSocketServer.new({
    accepted_domains: @accepted_domains,
    port: @port,
    host: @host
  })
  Thread.new do
    @server.run do |ws|
      begin
        ws.handshake
        que = Queue.new
        @connections.push(que)

        @history.compact.each do |message|
          ws.send(JSON.generate(echo: message))
        end

        thread = Thread.new do
          while true
            data = que.pop
            ws.send(data)
          end
        end

        while data = ws.receive
          begin
            JSON.parse(data).each do |name, value|
              trigger(name, value, ws)
            end
          rescue JSON::ParserError => e
            ws.send(JSON.generate(echo: e.message))
          end
        end
      rescue Errno::ECONNRESET => e
      ensure
        @connections.delete(que)
        thread.terminate if thread
      end
    end
  end
end

#send_all(data) ⇒ Object

接続している全てのクライアントに対してメッセージを送信



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# File 'lib/web/pushserver.rb', line 91

def send_all(data)
  if data.kind_of?(Symbol)
    # send_all(:"events.name") としてイベント名だけで送りたい場合の対応
    data = { data => true }
  end
  json = JSON.generate(data)
  @connections.each do |queue_of_connection|
    queue_of_connection.push(json)
  end
  # echo 以外のイベントは履歴に保存しない
  message = data[:echo]
  if message
    stack_to_history(message)
  end
rescue JSON::GeneratorError => e
  STDERR.puts $@.shift + ": #{e.message} (#{e.class})"
end

#stack_to_history(message) ⇒ Object 



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# File 'lib/web/pushserver.rb', line 109

def stack_to_history(message)
  if message == "." && @history[-1] =~ /\A\.+\z/
    # 進行中を表す .... の出力でヒストリーが消費されるのを防ぐため、
    # 連続した . は一つにまとめる
    @history[-1] << "."
  else
    @history.push(message)
    @history.shift
  end
end