Class: ValidEmail2::Dns

Inherits:
Object
  • Object
show all
Defined in:
lib/valid_email2/dns.rb

Defined Under Namespace

Classes: CacheEntry

Constant Summary collapse

MAX_CACHE_SIZE = 
1_000
CACHE = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dns_timeout = 5, dns_nameserver = nil) ⇒ Dns

Returns a new instance of Dns.



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# File 'lib/valid_email2/dns.rb', line 20

def initialize(dns_timeout = 5, dns_nameserver = nil)
  @dns_timeout = dns_timeout
  @dns_nameserver = dns_nameserver
end

Class Method Details

.clear_cache ⇒ Object 



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# File 'lib/valid_email2/dns.rb', line 16

def self.clear_cache
  CACHE.clear
end

.prune_cache ⇒ Object 



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# File 'lib/valid_email2/dns.rb', line 10

def self.prune_cache
  entries_sorted_by_cached_at_asc = CACHE.sort_by { |key, data| data.cached_at }
  entries_to_remove = entries_sorted_by_cached_at_asc.first(CACHE.size - MAX_CACHE_SIZE)
  entries_to_remove.each { |key, _value| CACHE.delete(key) }
end

Instance Method Details

#a_servers(domain) ⇒ Object 



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# File 'lib/valid_email2/dns.rb', line 29

def a_servers(domain)
  fetch(domain, Resolv::DNS::Resource::IN::A)
end

#mx_servers(domain) ⇒ Object 



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# File 'lib/valid_email2/dns.rb', line 25

def mx_servers(domain)
  fetch(domain, Resolv::DNS::Resource::IN::MX)
end