catstodon/app/services/fetch_remote_account_service.rb

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# frozen_string_literal: true
class FetchRemoteAccountService < BaseService
include AuthorExtractor
def call(url, prefetched_body = nil, protocol = :ostatus)
if prefetched_body.nil?
resource_url, resource_options, protocol = FetchAtomService.new.call(url)
else
resource_url = url
resource_options = { prefetched_body: prefetched_body }
end
case protocol
when :ostatus
process_atom(resource_url, **resource_options)
when :activitypub
ActivityPub::FetchRemoteAccountService.new.call(resource_url, **resource_options)
end
end
private
def process_atom(url, prefetched_body:)
xml = Nokogiri::XML(prefetched_body)
xml.encoding = 'utf-8'
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account = author_from_xml(xml.at_xpath('/xmlns:feed', xmlns: OStatus::TagManager::XMLNS), false)
UpdateRemoteProfileService.new.call(xml, account) if account.present? && trusted_domain?(url, account)
account
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rescue TypeError
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Rails.logger.debug "Unparseable URL given: #{url}"
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nil
rescue Nokogiri::XML::XPath::SyntaxError
Rails.logger.debug 'Invalid XML or missing namespace'
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nil
end
def trusted_domain?(url, account)
domain = Addressable::URI.parse(url).normalized_host
domain.casecmp(account.domain).zero? || domain.casecmp(Addressable::URI.parse(account.remote_url.presence || account.uri).normalized_host).zero?
end
end