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# AddressableUrlValidator
#
# Custom validator for URLs. This is a stricter version of UrlValidator - it also checks
# for using the right protocol, but it actually parses the URL checking for any syntax errors.
# The regex is also different from `URI` as we use `Addressable::URI` here.
#
# By default, only URLs for http, https, ssh, and git protocols will be considered valid.
# Provide a `:protocols` option to configure accepted protocols.
#
# Example:
#
# class User < ActiveRecord::Base
# validates :personal_url, addressable_url: true
#
# validates :ftp_url, addressable_url: { protocols: %w(ftp) }
#
# validates :git_url, addressable_url: { protocols: %w(http https ssh git) }
# end
#
class AddressableUrlValidator < ActiveModel::EachValidator
DEFAULT_OPTIONS = { protocols: %w(http https ssh git) }.freeze
def validate_each(record, attribute, value)
unless valid_url?(value)
record.errors.add(attribute, "must be a valid URL")
end
end
private
def valid_url?(value)
return false unless value
valid_protocol?(value) && valid_uri?(value)
end
def valid_uri?(value)
Gitlab::UrlSanitizer.valid?(value)
end
def valid_protocol?(value)
options = DEFAULT_OPTIONS.merge(self.options)
value =~ /\A#{URI.regexp(options[:protocols])}\z/
end
end
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