Module: Ohai::Mixin::HttpHelper

Defined in:
lib/ohai/mixin/http_helper.rb

Instance Method Summary collapse

Instance Method Details

#can_socket_connect?(addr, port, timeout = 2) ⇒ Boolean

see if we can socket connect to an address/port

Parameters:

  • addr (String) —

    the address to connect to

  • port (Integer) —

    the port to connect to

  • timeout (Integer) (defaults to: 2) —

    the seconds before timing out

Returns:

  • (Boolean) —

    can we connect?



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# File 'lib/ohai/mixin/http_helper.rb', line 30

def can_socket_connect?(addr, port, timeout = 2)
  t = Socket.new(Socket::Constants::AF_INET, Socket::Constants::SOCK_STREAM, 0)
  begin
    saddr = Socket.pack_sockaddr_in(port, addr)
  rescue SocketError => e # generally means dns resolution error
    logger.trace("Mixin HttpHelper: can_socket_connect? failed setting up socket connection: #{e}")
    return false
  end

  connected = false

  begin
    t.connect_nonblock(saddr)
  rescue Errno::EINPROGRESS
    _r, w, _e = IO.select(nil, [t], nil, timeout)
    if !w.nil?
      connected = true
    else
      begin
        t.connect_nonblock(saddr)
      rescue Errno::EISCONN
        t.close
        connected = true
      rescue SystemCallError
      end
    end
  rescue SystemCallError
  end
  logger.trace("Mixin HttpHelper: can_socket_connect? == #{connected}")
  connected
end