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"
PAYLOAD_LEN_BYTES = 
8
MIN_DATA_LEN = 
ZABBIX_HEADER.length + ZABBIX_VERSION.length + PAYLOAD_LEN_BYTES
VERSION = 
"0.1.3"

Class Method Summary collapse

Class Method Details

.dump(payload) ⇒ Object 



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

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

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

.load(data) ⇒ Object 



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

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

  if data.length < MIN_DATA_LEN
    raise Error, "data length is too short (data: #{data.inspect})"
  end

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

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

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

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

  payload_len = sliced.slice!(0, PAYLOAD_LEN_BYTES)
  payload_len = payload_len.unpack("Q").first

  if payload_len != sliced.length
    raise Error, "invalid payload length: expected=#{payload_len}, actual=#{sliced.length} (data: #{data.inspect})"
  end

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