31 lines
935 B
Ruby
31 lines
935 B
Ruby
# frozen_string_literal: true
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class DomainValidator < ActiveModel::EachValidator
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MAX_DOMAIN_LENGTH = 256
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MIN_LABEL_LENGTH = 1
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MAX_LABEL_LENGTH = 63
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ALLOWED_CHARACTERS_RE = /^[a-z0-9\-]+$/i
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def validate_each(record, attribute, value)
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return if value.blank?
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(options[:multiline] ? value.split : [value]).each do |domain|
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_, domain = domain.split('@') if options[:acct]
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next if domain.blank?
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record.errors.add(attribute, options[:multiline] ? :invalid_domain_on_line : :invalid, value: domain) unless compliant?(domain)
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end
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end
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private
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def compliant?(value)
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uri = Addressable::URI.new
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uri.host = value
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uri.normalized_host.size < MAX_DOMAIN_LENGTH && uri.normalized_host.split('.').all? { |label| label.size.between?(MIN_LABEL_LENGTH, MAX_LABEL_LENGTH) && label =~ ALLOWED_CHARACTERS_RE }
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rescue Addressable::URI::InvalidURIError, IDN::Idna::IdnaError
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false
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end
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end
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