70 lines
2.4 KiB
Ruby
70 lines
2.4 KiB
Ruby
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require 'active_model'
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require 'active_support/i18n'
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require 'public_suffix'
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require 'addressable/uri'
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# Most of this code is borowed from https://github.com/perfectline/validates_url
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class URLValidator < ActiveModel::EachValidator
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RESERVED_OPTIONS = [:schemes, :no_local]
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def initialize(options)
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options.reverse_merge!(schemes: ['http', 'https'])
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options.reverse_merge!(message: :url)
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options.reverse_merge!(no_local: false)
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options.reverse_merge!(public_suffix: false)
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options.reverse_merge!(accept_array: false)
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super(options)
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end
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def validate_each(record, attribute, value)
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message = options.fetch(:message)
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schemes = [*options.fetch(:schemes)].map(&:to_s)
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if value.respond_to?(:each)
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# Error out if we're not allowing arrays
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if !options.include?(:accept_array) || !options.fetch(:accept_array)
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record.errors.add(attribute, message, **filtered_options(value))
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end
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# We have to manually handle `:allow_nil` and `:allow_blank` since it's not caught by
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# ActiveRecord's own validators. We do that by just removing all the nil's if we want to
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# allow them so it's not passed on later.
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value = value.compact if options.include?(:allow_nil) && options.fetch(:allow_nil)
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value = value.compact_blank if options.include?(:allow_blank) && options.fetch(:allow_blank)
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result = value.flat_map { validate_url(record, attribute, _1, message, schemes) }
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errors = result.compact
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return errors.any? ? errors.first : true
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end
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validate_url(record, attribute, value, message, schemes)
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end
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protected
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def filtered_options(value)
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filtered = options.except(*RESERVED_OPTIONS)
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filtered[:value] = value
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filtered
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end
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def validate_url(record, attribute, value, message, schemes)
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uri = Addressable::URI.parse(value)
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host = uri && uri.host
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scheme = uri && uri.scheme
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valid_scheme = host && scheme && schemes.include?(scheme)
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valid_no_local = !options.fetch(:no_local) || (host && host.include?('.'))
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valid_suffix = !options.fetch(:public_suffix) || (host && PublicSuffix.valid?(host, default_rule: nil))
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unless valid_scheme && valid_no_local && valid_suffix
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record.errors.add(attribute, message, **filtered_options(value))
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end
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rescue Addressable::URI::InvalidURIError
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record.errors.add(attribute, message, **filtered_options(value))
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end
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end
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