Contents

class ValidateEmail
  
  class << self

    def valid?(value, user_options={})
      options = { :mx => false, :message => nil }.merge!(user_options)
      r       = false
      begin
        m = Mail::Address.new(value)
        # We must check that value contains a domain and that value is an email address
        r = m.domain && m.address == value
        t = m.__send__(:tree)
        # We need to dig into treetop
        # A valid domain must have dot_atom_text elements size > 1
        # user@localhost is excluded
        # treetop must respond to domain
        # We exclude valid email values like <[e-mail]>
        # Hence we use m.__send__(tree).domain
        r &&= (t.domain.dot_atom_text.elements.size > 1)
        # Check if domain has DNS MX record
        if r && options[:mx]
          require 'valid_email/mx_validator'
          r &&= mx_valid?(email)
        end
      rescue Exception => e
        r = false
      end
      r
    end

    def mx_valid?(value, fallback=false)
      r = false
      begin
        m = Mail::Address.new(value)
        if m.domain
          mx = []
          Resolv::DNS.open do |dns|
            mx.concat dns.getresources(m.domain, Resolv::DNS::Resource::IN::MX)
            mx.concat dns.getresources(m.domain, Resolv::DNS::Resource::IN::A) if fallback
          end
          r = mx.size > 0
        end
      rescue Exception =>e
        r = false
      end
      r
    end

    def mx_valid_with_fallback?(value)
      mx_valid?(value, true)
    end

    def ban_disposable_email?(value)
      r = false
      begin
        m = Mail::Address.new(value)
        r = !BanDisposableEmailValidator.config.include?(m.domain) if m.domain
      rescue Exception => e
        r = false
      end
      
      r
    end

  end

end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
valid_email-0.0.6	lib/valid_email/validate_email.rb
valid_email-0.0.7	lib/valid_email/validate_email.rb