Class: Relay

Inherits:
EventMachine::Connection
  • Object
show all
Defined in:
lib/relay.rb

Instance Method Summary collapse

Constructor Details

#initialize(side, logproc) ⇒ Relay 



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# File 'lib/relay.rb', line 2

def initialize(side, logproc)
  super
  pause
  @ws = nil
  @sig = nil
  @completion = nil
  @closed = false
  @unbind_sent = false
  @unbind_recv = false
  @remote_ip = nil
  @connection_inactivity_timeout = 0.0
  @log = lambda { |msg, **ctx| logproc[msg, side: side, ip: @remote_ip, sig: @sig, **ctx] }
end

Instance Method Details

#bind(ws, remote_ip) ⇒ Object 



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# File 'lib/relay.rb', line 16

def bind(ws, remote_ip)
  @ws = ws
  @sig = "#{ws.signature}.#{signature}"
  @completion = EventMachine::Completion.new
  @closed = false
  @unbind_sent = false
  @unbind_recv = false
  @remote_ip = remote_ip
  @connection_inactivity_timeout = comm_inactivity_timeout
  @log.call "[+] bind."
  @ws.onbinary do |data|
    if @closed
      @log.call "[~] data discard, bound closed.", connerror: error?, bytes: data.bytesize
    else
      send_data(data)
    end
  end
  @ws.onmessage do |msg|
    if msg == "unbind"
      @unbind_recv = true
      if @unbind_sent
        @completion.succeed
      else
        close_connection
      end
    else
      @log.call "[!] unexpected text on websocket.", msg: msg
    end
  end
  @ws.onclose do
    close_connection
    @completion.fail
    close_info = @ws.instance_variable_get(:@handler).instance_variable_get(:@close_info) || {}
    code = close_info[:code]
    reason = close_info[:reason]
    if reason
      reason = reason.empty? ? nil : reason.inspect
    end
    @log.call "[-] websocket is closed.", code: code, reason: reason
  end
  resume
  @completion
end

#receive_data(data) ⇒ Object 



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# File 'lib/relay.rb', line 60

def receive_data(data)
  @ws.send_binary(data)
end

#unbind(errno) ⇒ Object 



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# File 'lib/relay.rb', line 64

def unbind(errno)
  if errno
    if errno == Errno::ETIMEDOUT && @connection_inactivity_timeout > 0
      reason = "inactivity"
    elsif errno.respond_to?(:exception)
      reason = errno.exception.message
      reason[0] = reason[0].downcase
    else
      # win: errno can be set to :unknown on windows
      reason = errno.to_s
    end
    reason = reason.inspect
  end
  @log.call "[-] unbind.", reason: reason
  @closed = true
  if @ws&.state == :connected
    @ws.send_text("unbind")
    @unbind_sent = true
    @completion&.succeed if @unbind_recv
  end
end