Class: MinecraftServerStatus::Query

Inherits:
Object
  • Object
show all
Defined in:
lib/minecraft_server_status/query.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, port = 25565) ⇒ Query

Returns a new instance of Query.

Raises:

  • (ArgumentError) 


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# File 'lib/minecraft_server_status/query.rb', line 8

def initialize(host, port=25565)
  raise ArgumentError.new('host is required') if host.nil?
  @host = host
  @port = port
end

Instance Attribute Details

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/minecraft_server_status/query.rb', line 6

def host
  @host
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/minecraft_server_status/query.rb', line 6

def port
  @port
end

Instance Method Details

#execute(options = {}) ⇒ Object 



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# File 'lib/minecraft_server_status/query.rb', line 14

def execute(options={})
  timeout_sec = options.fetch(:timeout_sec, 1)
  retry_limit = options.fetch(:retry_limit, 1)
  retry_count = 0
  errors = []

  while retry_count < retry_limit
    begin
      response = ""
      Timeout.timeout(timeout_sec) do
        begin
          # Connect
          socket = TCPSocket.open(host, port)

          # Send request
          socket.write(pack_data("\x00\x00" + pack_data(host.encode("UTF-8")) + pack_port(port) + "\x01"))
          socket.write(pack_data("\x00"))

          # Read response
          unpack_varint(socket)
          unpack_varint(socket)
          l = unpack_varint(socket)
          while response.length < l
            response += socket.recv(1024)
          end
        ensure
          # Close
          socket.close if socket
        end
      end
      response.force_encoding("UTF-8")
      json_response = JSON.parse(response.gsub(/\xC2\xA7./, ''))
      return Result.new(json_response, true, errors)
    rescue Exception => e
      errors << e
      retry_count += 1
    end
  end
  return Result.new(nil, false, errors)
end