Class: Dps::DNS

Inherits:
Object
  • Object
show all
Defined in:
lib/dps/dns.rb

Defined Under Namespace

Classes: Endpoint, InvalidRecord, NoRecords, TooManyRecords

Class Method Summary collapse

Class Method Details

.decode_txt_record(value) ⇒ Object 



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# File 'lib/dps/dns.rb', line 12

def decode_txt_record(value)
  parts = value.gsub('"', '').split
  
  # Reverse since Ruby #pop starts from end of list.
  parts.reverse!
  action = parts.pop
  parts.reverse!

  case action
  when "dps:endpoint"  
    Endpoint.new(parts)
  else
    InvalidRecord.new("Unexpected action '#{action}'")
  end
end

.get_endpoint(domain) ⇒ Object 



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# File 'lib/dps/dns.rb', line 28

def get_endpoint(domain)
  records = get_records(domain).select { |r| r.is_a?(Endpoint) }
  
  if records.length > 1
    TooManyRecords.new("Too many valid endpoint TXT records returned.")
  elsif records.length == 0
    NoRecords.new("No valid endpoint TXT records found.")
  else
    records[0]
  end
end

.get_records(domain) ⇒ Object 



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# File 'lib/dps/dns.rb', line 7

def get_records(domain)
  get_txt_records(domain).
  collect { |value| decode_txt_record(value) }.select(&:valid?)
end