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https://github.com/glitch-soc/mastodon.git
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10bd6f415d
Most of the time, when sharing toots, people use the toot URL rather than the toot URI, which makes sense since it is the user-facing URL. In Mastodon's case, the URL and URI are different, and Mastodon does not have an index on URL, which means searching a private toot by URL is done with a slow query that will only succeed for very recent toots. This change gets rid of the slow query, and attempts to guess the URI from URL instead, as Mastodon's are predictable.
104 lines
2.7 KiB
Ruby
104 lines
2.7 KiB
Ruby
# frozen_string_literal: true
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class ResolveURLService < BaseService
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include JsonLdHelper
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include Authorization
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def call(url, on_behalf_of: nil)
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@url = url
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@on_behalf_of = on_behalf_of
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if local_url?
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process_local_url
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elsif !fetched_resource.nil?
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process_url
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else
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process_url_from_db
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end
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end
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private
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def process_url
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if equals_or_includes_any?(type, ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES)
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ActivityPub::FetchRemoteAccountService.new.call(resource_url, prefetched_body: body)
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elsif equals_or_includes_any?(type, ActivityPub::Activity::Create::SUPPORTED_TYPES + ActivityPub::Activity::Create::CONVERTED_TYPES)
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status = FetchRemoteStatusService.new.call(resource_url, body)
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authorize_with @on_behalf_of, status, :show? unless status.nil?
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status
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end
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end
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def process_url_from_db
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return unless @on_behalf_of.present? && [401, 403, 404].include?(fetch_resource_service.response_code)
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# It may happen that the resource is a private toot, and thus not fetchable,
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# but we can return the toot if we already know about it.
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uris = [@url]
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# We don't have an index on `url`, so try guessing the `uri` from `url`
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parsed_url = Addressable::URI.parse(@url)
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parsed_url.path.match(%r{/@(?<username>#{Account::USERNAME_RE})/(?<status_id>[0-9]+)\Z}) do |matched|
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parsed_url.path = "/users/#{matched[:username]}/statuses/#{matched[:status_id]}"
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uris << parsed_url.to_s
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end
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status = Status.find_by(uri: uris)
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authorize_with @on_behalf_of, status, :show? unless status.nil?
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status
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rescue Mastodon::NotPermittedError
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nil
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end
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def fetched_resource
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@fetched_resource ||= fetch_resource_service.call(@url)
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end
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def fetch_resource_service
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@_fetch_resource_service ||= FetchResourceService.new
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end
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def resource_url
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fetched_resource.first
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end
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def body
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fetched_resource.second[:prefetched_body]
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end
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def type
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json_data['type']
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end
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def json_data
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@json_data ||= body_to_json(body)
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end
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def local_url?
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TagManager.instance.local_url?(@url)
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end
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def process_local_url
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recognized_params = Rails.application.routes.recognize_path(@url)
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return unless recognized_params[:action] == 'show'
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if recognized_params[:controller] == 'statuses'
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status = Status.find_by(id: recognized_params[:id])
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check_local_status(status)
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elsif recognized_params[:controller] == 'accounts'
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Account.find_local(recognized_params[:username])
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end
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end
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def check_local_status(status)
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return if status.nil?
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authorize_with @on_behalf_of, status, :show?
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status
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rescue Mastodon::NotPermittedError
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nil
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end
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end
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