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Ruby On Rails in UA/Code Review, теоретические вопросы/Регулярные выражения/Проверка валидности емайл

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2008-06-09 14:13:58	Ответить
Ruslan Voloshin Адрес: odessa Сообщений: 1293 Регистр: 2007-03-13 его блог 40 сообщ.	Проверка валидности емайл
	test_addresses = [ #The following are valid addresses according to RFC822. 'joe@example.com', 'joe.bloggs@mail.example.com', 'joe+ruby-mail@example.com', 'joe(and-mary)@example.museum', 'joe@localhost', #--- 'joe', 'joe@', '@example.com', 'joe@example@example.com', 'joe and mary@example.com' ] #--- valid = '[^ @]+' # Exclude characters always invalid in email addresses username_and_machine = /^#{valid}@#{valid}$/ test_addresses.collect { \|i\| i =~ username_and_machine } # => [0, 0, 0, 0, 0, nil, nil, nil, nil, nil] #--- username_and_machine_with_tld = /^#{valid}@#{valid}\.#{valid}$/ test_addresses.collect { \|i\| i =~ username_and_machine_with_tld } # => [0, 0, 0, 0, nil, nil, nil, nil, nil, nil] #--- def probably_valid?(email) valid = '[A-Za-z\d.+-]+' #Commonly encountered email address characters (email =~ /#{valid}@#{valid}\.#{valid}/) == 0 end #These give the correct result. probably_valid? 'joe@example.com' # => true probably_valid? 'joe+ruby-mail@example.com' # => true probably_valid? 'joe.bloggs@mail.example.com' # => true probably_valid? 'joe@examplecom' # => false probably_valid? 'joe+ruby-mail@example.com' # => true probably_valid? 'joe@localhost' # => false # This address is valid, but probably_valid thinks it's not. probably_valid? 'joe(and-mary)@example.museum' # => false # This address is valid, but certainly wrong. probably_valid? 'joe@example.cpm' # => true #--- require 'resolv' def valid_email_host?(email) hostname = email[(email =~ /@/)+1..email.length] valid = true begin Resolv::DNS.new.getresource(hostname, Resolv::DNS::Resource::IN::MX) rescue Resolv::ResolvError valid = false end return valid end #example.com is a real domain, but it won't accept mail valid_email_host?('joe@example.com') # => false #lcqkxjvoem.mil is not a real domain. valid_email_host?('joe@lcqkxjvoem.mil') # => false #oreilly.com exists and accepts mail, though there might not be a 'joe' there. valid_email_host?('joe@oreilly.com') # => true #--- ------------ Занимаюсь вебом и продвижением сайтов.
	email validation

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