Module: ZabbixProtocol

Defined in:
lib/zabbix_protocol.rb,
lib/zabbix_protocol/version.rb

Defined Under Namespace

Classes: Error

Constant Summary collapse

ZABBIX_HEADER =

www.zabbix.org/wiki/Docs/protocols/zabbix_agent/1.4

"ZBXD"
ZABBIX_VERSION = 
"\x01"
DATA_LEN_BYTES = 
8
MIN_RESPONSE_LEN = 
ZABBIX_HEADER.length + ZABBIX_VERSION.length + DATA_LEN_BYTES
VERSION = 
"0.1.1"

Class Method Summary collapse

Class Method Details

.dump(data) ⇒ Object 



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# File 'lib/zabbix_protocol.rb', line 15

def self.dump(data)
  if data.is_a?(Hash)
    data = MultiJson.dump(data)
  else
    data = data.to_s
  end

  [
    ZABBIX_HEADER,
    ZABBIX_VERSION,
    [data.length].pack('Q'),
    data
  ].join
end

.load(res_data) ⇒ Object 



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# File 'lib/zabbix_protocol.rb', line 30

def self.load(res_data)
  unless res_data.is_a?(String)
    raise TypeError, "wrong argument type #{res_data.class} (expected String)"
  end

  if res_data.length < MIN_RESPONSE_LEN
    raise Error, "response data is too short"
  end

  data = res_data.dup
  header = data.slice!(0, ZABBIX_HEADER.length)

  if header != ZABBIX_HEADER
    raise Error, "invalid header: #{header.inspect}"
  end

  version = data.slice!(0, ZABBIX_VERSION.length)

  if version != ZABBIX_VERSION
    raise Error, "unsupported version: #{version.inspect}"
  end

  data_len = data.slice!(0, DATA_LEN_BYTES)
  data_len = data_len.unpack("Q").first

  if data_len != data.length
    raise Error, "invalid data length: expected=#{data_len}, actual=#{data.length}"
  end

  begin
    MultiJson.load(data)
  rescue MultiJson::ParseError
    data
  end
end