b7bd6c8fdd
Require users who signup using proxies to verify their email addresses before they can perform any edits. For verification purposes, the email must be a nondisposable address from a whitelist of trusted email providers.
121 lines
3.6 KiB
Ruby
121 lines
3.6 KiB
Ruby
require 'resolv'
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module EmailValidator
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module_function
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IGNORE_DOTS = %w[gmail.com]
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IGNORE_PLUS_ADDRESSING = %w[gmail.com hotmail.com outlook.com live.com]
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IGNORE_MINUS_ADDRESSING = %w[yahoo.com]
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CANONICAL_DOMAINS = {
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"googlemail.com" => "gmail.com",
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"hotmail.co.uk" => "outlook.com",
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"hotmail.co.jp" => "outlook.com",
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"hotmail.co.th" => "outlook.com",
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"hotmail.com" => "outlook.com",
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"hotmail.ca" => "outlook.com",
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"hotmail.de" => "outlook.com",
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"hotmail.es" => "outlook.com",
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"hotmail.fr" => "outlook.com",
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"hotmail.it" => "outlook.com",
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"live.com.au" => "outlook.com",
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"live.com.ar" => "outlook.com",
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"live.com.mx" => "outlook.com",
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"live.co.uk" => "outlook.com",
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"live.com" => "outlook.com",
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"live.ca" => "outlook.com",
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"live.cl" => "outlook.com",
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"live.cn" => "outlook.com",
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"live.de" => "outlook.com",
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"live.fr" => "outlook.com",
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"live.it" => "outlook.com",
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"live.jp" => "outlook.com",
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"live.nl" => "outlook.com",
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"live.se" => "outlook.com",
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"msn.com" => "outlook.com",
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"yahoo.com.au" => "yahoo.com",
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"yahoo.com.ar" => "yahoo.com",
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"yahoo.com.br" => "yahoo.com",
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"yahoo.com.cn" => "yahoo.com",
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"yahoo.com.hk" => "yahoo.com",
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"yahoo.com.mx" => "yahoo.com",
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"yahoo.com.ph" => "yahoo.com",
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"yahoo.com.sg" => "yahoo.com",
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"yahoo.com.tw" => "yahoo.com",
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"yahoo.com.vn" => "yahoo.com",
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"yahoo.co.id" => "yahoo.com",
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"yahoo.co.kr" => "yahoo.com",
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"yahoo.co.jp" => "yahoo.com",
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"yahoo.co.uk" => "yahoo.com",
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"yahoo.ca" => "yahoo.com",
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"yahoo.cn" => "yahoo.com",
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"yahoo.de" => "yahoo.com",
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"yahoo.es" => "yahoo.com",
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"yahoo.fr" => "yahoo.com",
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"yahoo.it" => "yahoo.com",
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"ymail.com" => "yahoo.com",
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"126.com" => "163.com",
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"aim.com" => "aol.com",
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"gmx.com" => "gmx.net",
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"gmx.at" => "gmx.net",
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"gmx.ch" => "gmx.net",
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"gmx.de" => "gmx.net",
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"gmx.fr" => "gmx.net",
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"gmx.us" => "gmx.net",
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}
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def normalize(address)
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return nil unless address.count("@") == 1
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name, domain = address.downcase.split("@")
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domain = CANONICAL_DOMAINS.fetch(domain, domain)
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name = name.delete(".") if domain.in?(IGNORE_DOTS)
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name = name.gsub(/\+.*\z/, "") if domain.in?(IGNORE_PLUS_ADDRESSING)
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name = name.gsub(/-.*\z/, "") if domain.in?(IGNORE_MINUS_ADDRESSING)
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"#{name}@#{domain}"
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end
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def nondisposable?(address)
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domain = Mail::Address.new(address).domain
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domain.in?(Danbooru.config.email_domain_verification_list)
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end
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def undeliverable?(to_address, from_address: Danbooru.config.contact_email, timeout: 3)
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mail_server = mx_domain(to_address, timeout: timeout)
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mail_server.nil? || rcpt_to_failed?(to_address, from_address, mail_server, timeout: timeout)
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rescue
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false
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end
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def rcpt_to_failed?(to_address, from_address, mail_server, timeout: nil)
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return false unless smtp_enabled?
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from_domain = Mail::Address.new(from_address).domain
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smtp = Net::SMTP.new(mail_server)
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smtp.read_timeout = timeout
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smtp.open_timeout = timeout
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smtp.start(from_domain) do |conn|
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conn.mailfrom(from_address)
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# Net::SMTPFatalError is raised if RCPT TO returns a 5xx error.
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response = conn.rcptto(to_address) rescue $!
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return response.is_a?(Net::SMTPFatalError)
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end
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end
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def mx_domain(to_address, timeout: nil)
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domain = Mail::Address.new(to_address).domain
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dns = Resolv::DNS.new
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dns.timeouts = timeout
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response = dns.getresource(domain, Resolv::DNS::Resource::IN::MX)
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response.exchange.to_s
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rescue Resolv::ResolvError
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nil
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end
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end
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