forked from fedi/mastodon
50 lines
1.4 KiB
Ruby
50 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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class VerifyLinkService < BaseService
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def call(field)
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@link_back = ActivityPub::TagManager.instance.url_for(field.account)
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@url = field.value_for_verification
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perform_request!
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return unless link_back_present?
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field.mark_verified!
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rescue OpenSSL::SSL::SSLError, HTTP::Error, Addressable::URI::InvalidURIError, Mastodon::HostValidationError, Mastodon::LengthValidationError, IPAddr::AddressFamilyError => e
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Rails.logger.debug "Error fetching link #{@url}: #{e}"
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nil
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end
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private
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def perform_request!
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@body = Request.new(:get, @url).add_headers('Accept' => 'text/html').perform do |res|
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res.code != 200 ? nil : res.body_with_limit
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end
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end
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def link_back_present?
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return false if @body.blank?
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links = Nokogiri::HTML5(@body).xpath('//a[contains(concat(" ", normalize-space(@rel), " "), " me ")]|//link[contains(concat(" ", normalize-space(@rel), " "), " me ")]')
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if links.any? { |link| link['href']&.downcase == @link_back.downcase }
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true
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elsif links.empty?
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false
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else
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link_redirects_back?(links.first['href'])
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end
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end
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def link_redirects_back?(test_url)
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return false if test_url.blank?
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redirect_to_url = Request.new(:head, test_url, follow: false).perform do |res|
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res.headers['Location']
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end
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redirect_to_url == @link_back
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end
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end
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