Class: Termfront::Network::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/termfront/network/connection.rb

Defined Under Namespace

Classes: PeerInfo

Constant Summary collapse

MAX_MSG_BYTES = 
64 * 1024

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/termfront/network/connection.rb', line 25

def initialize
  @sock = nil
  @buf = +""
  @ping_ts = 0
  @rtt = 0
  @peer_info = nil
end

Instance Attribute Details

#peer_info ⇒ Object (readonly)

Returns the value of attribute peer_info.



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# File 'lib/termfront/network/connection.rb', line 23

def peer_info
  @peer_info
end

#rtt ⇒ Object (readonly)

Returns the value of attribute rtt.



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# File 'lib/termfront/network/connection.rb', line 22

def rtt
  @rtt
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/termfront/network/connection.rb', line 97

def close
  begin
    @sock&.close
  rescue StandardError
    nil
  end
  @sock = nil
  @peer_info = nil
end

#connect(host, port, ca_file: nil) ⇒ Object 



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# File 'lib/termfront/network/connection.rb', line 33

def connect(host, port, ca_file: nil)
  tcp = TCPSocket.new(host, port)
  tcp.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)

  ctx = build_ssl_context(ca_file: ca_file)
  @sock = OpenSSL::SSL::SSLSocket.new(tcp, ctx)
  @sock.hostname = host if @sock.respond_to?(:hostname=)
  @sock.sync = true
  @sock.connect
  @sock.post_connection_check(host)
  @peer_info = build_peer_info(@sock.peer_cert)
rescue StandardError
  tcp&.close
  @sock = nil
  @peer_info = nil
  raise
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/termfront/network/connection.rb', line 107

def connected?
  !@sock.nil?
end

#ping(now) ⇒ Object 



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# File 'lib/termfront/network/connection.rb', line 111

def ping(now)
  @ping_ts = now
  send_msg({ t: "ping", ts: (now * 1000).to_i })
end

#receive ⇒ Object 



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# File 'lib/termfront/network/connection.rb', line 59

def receive
  return [] unless @sock

  messages = []

  while IO.select([@sock], nil, nil, 0)
    begin
      data = @sock.read_nonblock(4096)
      @buf << data

      if @buf.bytesize > MAX_MSG_BYTES
        close
        break
      end

      while (nl = @buf.index("\n"))
        line = @buf.slice!(0, nl + 1)
        begin
          msg = JSON.parse(line, symbolize_names: true)
          if msg[:t] == "pong"
            @rtt = ((clock - @ping_ts) * 1000).to_i if @ping_ts > 0
          else
            messages << msg
          end
        rescue JSON::ParserError
          next
        end
      end
    rescue IO::WaitReadable
      break
    rescue EOFError, Errno::ECONNRESET, IOError, OpenSSL::SSL::SSLError
      break
    end
  end

  messages
end

#send_msg(hash) ⇒ Object 



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# File 'lib/termfront/network/connection.rb', line 51

def send_msg(hash)
  return unless @sock

  @sock.write(JSON.generate(hash) + "\n")
rescue Errno::EPIPE, Errno::ECONNRESET, IOError, OpenSSL::SSL::SSLError
  nil
end

#socket ⇒ Object 



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# File 'lib/termfront/network/connection.rb', line 116

def socket
  @sock
end