Class: EmailValidation

Inherits:
Object
  • Object
show all
Defined in:
lib/validates_email/email_validation.rb

Constant Summary collapse

EMAIL_REGEX = 
/^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i

Class Method Summary collapse

Class Method Details

.valid_address_format?(address) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/validates_email/email_validation.rb', line 21

def self.valid_address_format?(address)
  address =~ EMAIL_REGEX
end

.valid_email?(address, level = 2, pass_on_unable_to_verify = true, from = "") ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/validates_email/email_validation.rb', line 7

def self.valid_email?(address, level = 2, pass_on_unable_to_verify = true, from = "")
  vaf = valid_address_format?(address)
  vms, mail_server = valid_mail_server?(address) if vaf and level > 1
  #--
  #tmp_a = valid_mail_server?(address) if vaf and level > 1
  #vms = tmp_a[0] if vaf and level > 1
  #mail_server = tmp_a[1] if vaf and level > 1
  #--
  vea = valid_email_account?(address, mail_server, pass_on_unable_to_verify, from) if vms and level > 2
  
  return true if (vaf and level == 1) or (vms and level == 2) or (vea and level == 3)
  false
end

.valid_email_account?(address, mail_server, pass_on_unable_to_verify = true, from = "") ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/validates_email/email_validation.rb', line 40

def self.valid_email_account?(address, mail_server, pass_on_unable_to_verify = true, from = "")
  continue = false
  unable_to_verify = false
  debug = false
  tmp_a = mail_server.split(".")
  short_server_name = tmp_a.slice!(0, tmp_a.length - 1).join(".")

  server = Net::Telnet::new("Host" => mail_server, "Port" => 25, "Prompt" => /250|550|221/)
  print "Connected\n" if debug and server

  continue = server.cmd("helo " + short_server_name).to_s if server
  print "helo " + short_server_name + " " + continue.to_s + "\n" if debug

  continue = server.cmd("mail from:<" + from + ">").to_s.include?("250") if continue
  print "mail from:<" + from + "> " + continue.to_s + "\n" if debug


  tmp_s = server.cmd("rcpt to:<" + address + ">").to_s if continue
  print "rcpt to:<" + address + ">\n" + tmp_s if debug

  continue = tmp_s.include?("250") ? true : false
  print continue.to_s + "\n" if debug
  unable_to_verify = !tmp_s.include?("unknown") and !tmp_s.include?("250") ? true : false
  print unable_to_verify.to_s + "\n" if debug

  server.cmd("quit")
  print "disconnected\n" if debug

  continue or (unable_to_verify and pass_on_unable_to_verify)
end

.valid_mail_server?(address) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/validates_email/email_validation.rb', line 25

def self.valid_mail_server?(address)
  tmp_a = Array.new
  domain = address.split('@')[1]
  Resolv::DNS.open do |dns|
    #--
    #ress = dns.getresources "www.ruby-lang.org", Resolv::DNS::Resource::IN::A
    #p ress.map { |r| r.address }
    ress = dns.getresources domain, Resolv::DNS::Resource::IN::MX
    #p ress.map { |r| [r.exchange.to_s, r.preference] }
    #++
    tmp_a = ress.map { |r| [r.exchange.to_s, r.preference] }
  end
  return tmp_a.length > 0, (tmp_a[0].class.name == Array ? tmp_a[0][0] : nil)
end