Class: ApartmentAcmeClient::DnsApi::CheckDns

Inherits:
Object
  • Object
show all
Defined in:
lib/apartment_acme_client/dns_api/check_dns.rb

Overview

Check to see if a particular DNS record is present.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root_domain, dns_record) ⇒ CheckDns

Returns a new instance of CheckDns.



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# File 'lib/apartment_acme_client/dns_api/check_dns.rb', line 10

def initialize(root_domain, dns_record)
  # ensure we only have the TLD, not a subdomain
  @root_domain = root_domain.split(".").last(2).join(".")
  @dns_record = dns_record
end

Instance Attribute Details

#dns_record ⇒ Object (readonly)

Returns the value of attribute dns_record.



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# File 'lib/apartment_acme_client/dns_api/check_dns.rb', line 8

def dns_record
  @dns_record
end

#root_domain ⇒ Object (readonly)

Returns the value of attribute root_domain.



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# File 'lib/apartment_acme_client/dns_api/check_dns.rb', line 8

def root_domain
  @root_domain
end

Instance Method Details

#check_dns(value) ⇒ Object

Search DNS recodrs for any entries which are TXT and include the text ‘value’



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# File 'lib/apartment_acme_client/dns_api/check_dns.rb', line 18

def check_dns(value)
  valid = true

  nameservers.each do |nameserver|
    begin
      records = Resolv::DNS.open(nameserver: nameserver) do |dns|
        dns.getresources(
          dns_record,
          Resolv::DNS::Resource::IN::TXT
        )
      end
      records = records.map(&:strings).flatten
      valid = records.include?(value)
    rescue Resolv::ResolvError
      return false
    end
    return false unless valid
  end

  valid
end

#nameservers ⇒ Object 



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# File 'lib/apartment_acme_client/dns_api/check_dns.rb', line 40

def nameservers
  return @nameservers if defined?(@nameservers)

  @nameservers = []
  Resolv::DNS.open(nameserver: '8.8.8.8') do |dns|
    while nameservers.empty?
      @nameservers = dns.getresources(
        root_domain,
        Resolv::DNS::Resource::IN::NS
      ).map(&:name).map(&:to_s)
    end
  end

  @nameservers
end

#wait_for_present(value, timeout_seconds: 120) ⇒ Object 



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# File 'lib/apartment_acme_client/dns_api/check_dns.rb', line 56

def wait_for_present(value, timeout_seconds: 120)
  time = 1
  until check_dns(value)
    puts "Waiting for DNS to update"
    sleep 1
    time += 1
    break if time > timeout_seconds
  end
end