mirror of
https://github.com/discourse/discourse.git
synced 2024-11-30 05:23:49 +08:00
66 lines
2.0 KiB
Ruby
66 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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require "open-uri"
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require "nokogiri"
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require "excon"
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module Jobs
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class CrawlTopicLink < ::Jobs::Base
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sidekiq_options queue: "low"
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def execute(args)
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raise Discourse::InvalidParameters.new(:topic_link_id) if args[:topic_link_id].blank?
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topic_link = TopicLink.find_by(id: args[:topic_link_id], internal: false, crawled_at: nil)
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return if topic_link.blank?
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# Look for a topic embed for the URL. If it exists, use its title and don't crawl
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topic_embed =
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TopicEmbed.where(embed_url: topic_link.url).includes(:topic).references(:topic).first
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# topic could be deleted, so skip
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if topic_embed && topic_embed.topic
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TopicLink.where(id: topic_link.id).update_all(
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["title = ?, crawled_at = CURRENT_TIMESTAMP", topic_embed.topic.title[0..255]],
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)
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return
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end
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begin
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crawled = false
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# Special case: Images
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# If the link is to an image, put the filename as the title
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if FileHelper.is_supported_image?(topic_link.url)
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uri = URI(topic_link.url)
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filename = File.basename(uri.path)
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crawled =
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(
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TopicLink.where(id: topic_link.id).update_all(
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["title = ?, crawled_at = CURRENT_TIMESTAMP", filename],
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) == 1
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)
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end
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unless crawled
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# Fetch the beginning of the document to find the title
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title = RetrieveTitle.crawl(topic_link.url)
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if title.present?
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crawled =
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(
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TopicLink.where(id: topic_link.id).update_all(
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["title = ?, crawled_at = CURRENT_TIMESTAMP", title[0..254]],
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) == 1
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)
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end
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end
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rescue Exception
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# If there was a connection error, do nothing
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ensure
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if !crawled && topic_link.present?
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TopicLink.where(id: topic_link.id).update_all("crawled_at = CURRENT_TIMESTAMP")
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end
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end
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end
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end
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end
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