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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
132 lines
3.7 KiB
Ruby
132 lines
3.7 KiB
Ruby
# frozen_string_literal: true
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require_dependency 'discourse'
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require 'ipaddr'
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require 'url_helper'
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class TopicLinkClick < ActiveRecord::Base
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belongs_to :topic_link, counter_cache: :clicks
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belongs_to :user
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validates_presence_of :topic_link_id
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WHITELISTED_REDIRECT_HOSTNAMES = Set.new(%W{www.youtube.com youtu.be})
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# Create a click from a URL and post_id
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def self.create_from(args = {})
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url = args[:url][0...TopicLink.max_url_length]
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return nil if url.blank?
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uri = UrlHelper.relaxed_parse(url)
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urls = Set.new
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urls << url
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if url =~ /^http/
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urls << url.sub(/^https/, 'http')
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urls << url.sub(/^http:/, 'https:')
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urls << UrlHelper.schemaless(url)
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end
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urls << UrlHelper.absolute_without_cdn(url)
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urls << uri.path if uri.try(:host) == Discourse.current_hostname
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query = url.index('?')
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unless query.nil?
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endpos = url.index('#') || url.size
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urls << url[0..query - 1] + url[endpos..-1]
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end
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# link can have query params, and analytics can add more to the end:
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i = url.length
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while i = url.rindex('&', i - 1)
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urls << url[0...i]
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end
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# add a cdn link
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if uri
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if Discourse.asset_host.present?
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cdn_uri = begin
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URI.parse(Discourse.asset_host)
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rescue URI::Error
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end
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if cdn_uri && cdn_uri.hostname == uri.hostname && uri.path.starts_with?(cdn_uri.path)
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is_cdn_link = true
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urls << uri.path[cdn_uri.path.length..-1]
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end
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end
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if SiteSetting.Upload.s3_cdn_url.present?
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cdn_uri = begin
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URI.parse(SiteSetting.Upload.s3_cdn_url)
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rescue URI::Error
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end
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if cdn_uri && cdn_uri.hostname == uri.hostname && uri.path.starts_with?(cdn_uri.path)
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is_cdn_link = true
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path = uri.path[cdn_uri.path.length..-1]
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urls << path
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urls << "#{Discourse.store.absolute_base_url}#{path}"
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end
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end
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end
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link = TopicLink.select([:id, :user_id])
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# test for all possible URLs
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link = link.where(Array.new(urls.count, "url = ?").join(" OR "), *urls)
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# Find the forum topic link
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link = link.where(post_id: args[:post_id]) if args[:post_id].present?
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# If we don't have a post, just find the first occurance of the link
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link = link.where(topic_id: args[:topic_id]) if args[:topic_id].present?
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link = link.first
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# If no link is found...
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unless link.present?
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# ... return the url for relative links or when using the same host
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return url if url =~ /^\/[^\/]/ || uri.try(:host) == Discourse.current_hostname
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# If we have it somewhere else on the site, just allow the redirect.
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# This is likely due to a onebox of another topic.
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link = TopicLink.find_by(url: url)
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return link.url if link.present?
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return nil unless uri
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# Only redirect to whitelisted hostnames
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return url if WHITELISTED_REDIRECT_HOSTNAMES.include?(uri.hostname) || is_cdn_link
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return nil
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end
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return url if args[:user_id] && link.user_id == args[:user_id]
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# Rate limit the click counts to once in 24 hours
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rate_key = "link-clicks:#{link.id}:#{args[:user_id] || args[:ip]}"
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if $redis.setnx(rate_key, "1")
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$redis.expire(rate_key, 1.day.to_i)
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args[:ip] = nil if args[:user_id]
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create!(topic_link_id: link.id, user_id: args[:user_id], ip_address: args[:ip])
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end
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url
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end
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end
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# == Schema Information
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#
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# Table name: topic_link_clicks
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#
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# id :integer not null, primary key
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# topic_link_id :integer not null
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# user_id :integer
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# created_at :datetime not null
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# updated_at :datetime not null
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# ip_address :inet
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#
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# Indexes
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#
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# by_link (topic_link_id)
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#
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