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47 lines
1.3 KiB
47 lines
1.3 KiB
# 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 => 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::HTML(@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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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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