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30 lines
935 B
30 lines
935 B
# 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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