# frozen_string_literal: true
RSpec.describe TopicLink do
it { is_expected.to validate_presence_of :url }
def test_uri
URI.parse(Discourse.base_url)
end
fab!(:topic) { Fabricate(:topic, title: "unique topic name") }
fab!(:user) { topic.user }
fab!(:post) { Fabricate(:post) }
it "can't link to the same topic" do
ftl = TopicLink.new(url: "/t/#{topic.id}", topic_id: topic.id, link_topic_id: topic.id)
expect(ftl.valid?).to eq(false)
end
describe "external links" do
it "correctly handles links" do
non_png = "https://b.com/#{SecureRandom.hex}"
# prepare a title for one of the links
stub_request(:get, non_png).with(
headers: {
"Accept" => "*/*",
"Accept-Encoding" => "gzip",
"Host" => "b.com",
},
).to_return(
status: 200,
body: "amazing",
headers: {
},
)
# so we run crawl_topic_links
Jobs.run_immediately!
png_title = "#{SecureRandom.hex}.png"
png = "https://awesome.com/#{png_title}"
post = Fabricate(:post, raw: <<~RAW, user: user, topic: topic)
http://a.com/
#{non_png}
http://#{"a" * 200}.com/invalid
//b.com/#{"a" * 500}
#{png}
RAW
TopicLink.extract_from(post)
# we have a special rule for images title where we pull them out of the filename
expect(topic.topic_links.where(url: png).pick(:title)).to eq(png_title)
expect(topic.topic_links.where(url: non_png).pick(:title)).to eq("amazing")
expect(topic.topic_links.pluck(:url)).to contain_exactly(
png,
non_png,
"http://a.com/",
"//b.com/#{"a" * 500}"[0...TopicLink.max_url_length],
)
old_ids = topic.topic_links.pluck(:id)
TopicLink.extract_from(post)
new_ids = topic.topic_links.pluck(:id)
expect(new_ids).to contain_exactly(*old_ids)
end
end
describe "internal links" do
it "extracts onebox" do
other_topic = Fabricate(:topic, user: user)
Fabricate(:post, topic: other_topic, user: user, raw: "some content for the first post")
other_post =
Fabricate(:post, topic: other_topic, user: user, raw: "some content for the second post")
url =
"http://#{test_uri.host}/t/#{other_topic.slug}/#{other_topic.id}/#{other_post.post_number}"
invalid_url = "http://#{test_uri.host}/t/#{other_topic.slug}/9999999999999999999999999999999"
Fabricate(:post, topic: topic, user: user, raw: "initial post")
post =
Fabricate(
:post,
topic: topic,
user: user,
raw: "Link to another topic:\n\n#{url}\n\n#{invalid_url}",
)
TopicLink.extract_from(post)
link = topic.topic_links.first
# should have a link
expect(link).to be_present
# should be the canonical URL
expect(link.url).to eq(url)
end
context "with topic link" do
fab!(:other_topic) { Fabricate(:topic, user: user) }
fab!(:moderator) { Fabricate(:moderator) }
let(:post) { Fabricate(:post, topic: other_topic, user: user, raw: "some content") }
it "works" do
# ensure other_topic has a post
post
url = "http://#{test_uri.host}/t/#{other_topic.slug}/#{other_topic.id}"
Fabricate(:post, topic: topic, user: user, raw: "initial post")
linked_post =
Fabricate(:post, topic: topic, user: user, raw: "Link to another topic: #{url}")
# this is subtle, but we had a bug were second time
# TopicLink.extract_from was called a reflection was nuked
2.times do
TopicLink.extract_from(linked_post)
topic.reload
other_topic.reload
link = topic.topic_links.first
expect(link).to be_present
expect(link).to be_internal
expect(link.url).to eq(url)
expect(link.domain).to eq(test_uri.host)
expect(link.link_topic_id).to eq(other_topic.id)
expect(link).not_to be_reflection
reflection = other_topic.topic_links.first
expect(reflection).to be_present
expect(reflection).to be_reflection
expect(reflection.post_id).to be_present
expect(reflection.domain).to eq(test_uri.host)
expect(reflection.url).to eq(
"http://#{test_uri.host}/t/unique-topic-name/#{topic.id}/#{linked_post.post_number}",
)
expect(reflection.link_topic_id).to eq(topic.id)
expect(reflection.link_post_id).to eq(linked_post.id)
expect(reflection.user_id).to eq(link.user_id)
end
PostOwnerChanger.new(
post_ids: [linked_post.id],
topic_id: topic.id,
acting_user: user,
new_owner: Fabricate(:user),
).change_owner!
TopicLink.extract_from(linked_post)
expect(topic.topic_links.first.url).to eq(url)
linked_post.revise(post.user, raw: "no more linkies https://eviltrout.com")
expect(other_topic.reload.topic_links.where(link_post_id: linked_post.id)).to be_blank
end
it "works without id" do
post
url = "http://#{test_uri.host}/t/#{other_topic.slug}"
Fabricate(:post, topic: topic, user: user, raw: "initial post")
linked_post =
Fabricate(:post, topic: topic, user: user, raw: "Link to another topic: #{url}")
TopicLink.extract_from(linked_post)
link = topic.topic_links.first
reflection = other_topic.topic_links.first
expect(reflection).to be_present
expect(reflection).to be_reflection
expect(reflection.post_id).to be_present
expect(reflection.domain).to eq(test_uri.host)
expect(reflection.url).to eq(
"http://#{test_uri.host}/t/unique-topic-name/#{topic.id}/#{linked_post.post_number}",
)
expect(reflection.link_topic_id).to eq(topic.id)
expect(reflection.link_post_id).to eq(linked_post.id)
expect(reflection.user_id).to eq(link.user_id)
end
it "doesn't work for a deleted post" do
post
url = "http://#{test_uri.host}/t/#{other_topic.slug}/#{other_topic.id}"
Fabricate(:post, topic: topic, user: user, raw: "initial post")
linked_post =
Fabricate(:post, topic: topic, user: user, raw: "Link to another topic: #{url}")
TopicLink.extract_from(linked_post)
expect(other_topic.reload.topic_links.where(link_post_id: linked_post.id).count).to eq(1)
PostDestroyer.new(moderator, linked_post).destroy
TopicLink.extract_from(linked_post)
expect(other_topic.reload.topic_links.where(link_post_id: linked_post.id)).to be_blank
end
it "truncates long links" do
SiteSetting.slug_generation_method = "encoded"
long_title = "Καλημερα σε ολους και ολες" * 9 # 234 chars, but the encoded slug will be 1224 chars in length
other_topic = Fabricate(:topic, user: user, title: long_title)
expect(other_topic.slug.length).to be > TopicLink.max_url_length
Fabricate(:post, topic: other_topic, user: user, raw: "initial post")
other_topic_url = "http://#{test_uri.host}/t/#{other_topic.slug}/#{other_topic.id}"
post_with_link =
Fabricate(
:post,
topic: topic,
user: user,
raw: "Link to another topic: #{other_topic_url}",
)
TopicLink.extract_from(post_with_link)
topic.reload
link = topic.topic_links.first
expect(link.url.length).to eq(TopicLink.max_url_length)
end
it "does not truncate reflection links" do
SiteSetting.slug_generation_method = "encoded"
long_title = "Καλημερα σε ολους και ολες" * 9 # 234 chars, but the encoded slug will be 1224 chars in length
topic = Fabricate(:topic, user: user, title: long_title)
expect(topic.slug.length).to be > TopicLink.max_url_length
topic_url = "http://#{test_uri.host}/t/#{topic.slug}/#{topic.id}"
other_topic = Fabricate(:topic, user: user)
Fabricate(:post, topic: other_topic, user: user, raw: "initial post")
other_topic_url = "http://#{test_uri.host}/t/#{other_topic.slug}/#{other_topic.id}"
post_with_link =
Fabricate(
:post,
topic: topic,
user: user,
raw: "Link to another topic: #{other_topic_url}",
)
expect { TopicLink.extract_from(post_with_link) }.to_not raise_error
other_topic.reload
reflection_link = other_topic.topic_links.first
expect(reflection_link.url.length).to be > (TopicLink.max_url_length)
expect(reflection_link.url).to eq(topic_url)
end
end
context "with link to a user on discourse" do
let(:post) do
Fabricate(
:post,
topic: topic,
user: user,
raw: "user",
)
end
before { TopicLink.extract_from(post) }
it "does not extract a link" do
expect(topic.topic_links).to be_blank
end
end
context "with link to a discourse resource like a FAQ" do
let(:post) do
Fabricate(:post, topic: topic, user: user, raw: "faq link here")
end
before { TopicLink.extract_from(post) }
it "does not extract a link" do
expect(topic.topic_links).to be_present
end
end
context "with mention links" do
let(:post) { Fabricate(:post, topic: topic, user: user, raw: "Hey #{user.username_lower}") }
before { TopicLink.extract_from(post) }
it "does not extract a link" do
expect(topic.topic_links).to be_blank
end
end
context "with email address" do
it "does not extract a link" do
post =
Fabricate(
:post,
topic: topic,
user: user,
raw: "Valid email: foo@bar.com\n\nInvalid email: rfc822;name@domain.com",
)
TopicLink.extract_from(post)
expect(topic.topic_links).to be_blank
end
end
context "with mail link" do
let(:post) do
Fabricate(:post, topic: topic, user: user, raw: "[email]bar@example.com[/email]")
end
it "does not extract a link" do
TopicLink.extract_from(post)
expect(topic.topic_links).to be_blank
end
end
context "with quote links" do
it "sets quote correctly" do
linked_post = Fabricate(:post, topic: topic, user: user, raw: "my test post")
quoting_post =
Fabricate(
:post,
raw:
"[quote=\"#{user.username}, post: #{linked_post.post_number}, topic: #{topic.id}\"]\nquote\n[/quote]",
)
TopicLink.extract_from(quoting_post)
link = quoting_post.topic.topic_links.first
expect(link.link_post_id).to eq(linked_post.id)
expect(link.quote).to eq(true)
end
end
context "with link to a local attachments" do
let(:post) do
Fabricate(
:post,
topic: topic,
user: user,
raw:
'ruby.rb',
)
end
it "extracts the link" do
TopicLink.extract_from(post)
link = topic.topic_links.first
# extracted the link
expect(link).to be_present
# is set to internal
expect(link).to be_internal
# has the correct url
expect(link.url).to eq("/uploads/default/208/87bb3d8428eb4783.rb?foo=bar")
# should not be the reflection
expect(link).not_to be_reflection
# should have file extension
expect(link.extension).to eq("rb")
end
end
context "with link to an attachments uploaded on S3" do
let(:post) do
Fabricate(
:post,
topic: topic,
user: user,
raw:
'ruby.rb',
)
end
it "extracts the link" do
TopicLink.extract_from(post)
link = topic.topic_links.first
# extracted the link
expect(link).to be_present
# is not internal
expect(link).not_to be_internal
# has the correct url
expect(link.url).to eq(
"//s3.amazonaws.com/bucket/2104a0211c9ce41ed67989a1ed62e9a394c1fbd1446.rb",
)
# should not be the reflection
expect(link).not_to be_reflection
# should have file extension
expect(link.extension).to eq("rb")
end
end
end
describe "internal link from pm" do
it "works" do
pm = Fabricate(:topic, user: user, category_id: nil, archetype: "private_message")
Fabricate(:post, topic: pm, user: user, raw: "some content")
url = "http://#{test_uri.host}/t/topic-slug/#{topic.id}"
Fabricate(:post, topic: pm, user: user, raw: "initial post")
linked_post = Fabricate(:post, topic: pm, user: user, raw: "Link to another topic: #{url}")
TopicLink.extract_from(linked_post)
expect(topic.topic_links.first).to eq(nil)
expect(pm.topic_links.first).not_to eq(nil)
end
end
describe "internal link from unlisted topic" do
it "works" do
unlisted_topic = Fabricate(:topic, user: user, visible: false)
url = "http://#{test_uri.host}/t/topic-slug/#{topic.id}"
Fabricate(:post, topic: unlisted_topic, user: user, raw: "initial post")
linked_post =
Fabricate(:post, topic: unlisted_topic, user: user, raw: "Link to another topic: #{url}")
TopicLink.extract_from(linked_post)
expect(topic.topic_links.first).to eq(nil)
expect(unlisted_topic.topic_links.first).not_to eq(nil)
end
end
describe "internal link with non-standard port" do
it "includes the non standard port if present" do
other_topic = Fabricate(:topic, user: user)
SiteSetting.port = 5678
alternate_uri = URI.parse(Discourse.base_url)
url = "http://#{alternate_uri.host}:5678/t/topic-slug/#{other_topic.id}"
post = Fabricate(:post, topic: topic, user: user, raw: "Link to another topic: #{url}")
TopicLink.extract_from(post)
reflection = other_topic.topic_links.first
expect(reflection.url).to eq(
"http://#{alternate_uri.host}:5678/t/unique-topic-name/#{topic.id}",
)
end
end
describe "query methods" do
it "returns blank without posts" do
expect(TopicLink.counts_for(Guardian.new, nil, nil)).to be_blank
end
context "with data" do
let(:post) do
topic = Fabricate(:topic)
Fabricate(:post_with_external_links, user: topic.user, topic: topic)
end
let(:counts_for) { TopicLink.counts_for(Guardian.new, post.topic, [post]) }
it "creates a valid topic lookup" do
TopicLink.extract_from(post)
lookup = TopicLink.duplicate_lookup(post.topic)
expect(lookup).to be_present
expect(lookup["google.com"]).to be_present
ch = lookup["www.codinghorror.com/blog"]
expect(ch).to be_present
expect(ch[:domain]).to eq("www.codinghorror.com")
expect(ch[:username]).to eq(post.username)
expect(ch[:posted_at]).to be_present
expect(ch[:post_number]).to be_present
end
it "has the correct results" do
TopicLink.extract_from(post)
topic_link_first = post.topic.topic_links.first
TopicLinkClick.create!(topic_link: topic_link_first, ip_address: "192.168.1.1")
TopicLinkClick.create!(topic_link: topic_link_first, ip_address: "192.168.1.2")
topic_link_second = post.topic.topic_links.second
TopicLinkClick.create!(topic_link: topic_link_second, ip_address: "192.168.1.1")
expect(counts_for[post.id]).to be_present
expect(counts_for[post.id].first[:clicks]).to eq(2)
expect(counts_for[post.id].second[:clicks]).to eq(1)
array = TopicLink.topic_map(Guardian.new, post.topic_id)
expect(array.length).to eq(2)
expect(array[0].clicks).to eq(2)
expect(array[1].clicks).to eq(1)
end
it "secures internal links correctly" do
category = Fabricate(:category)
secret_topic = Fabricate(:topic, category: category)
url = "http://#{test_uri.host}/t/topic-slug/#{secret_topic.id}"
post = Fabricate(:post, raw: "hello test topic #{url}")
TopicLink.extract_from(post)
TopicLinkClick.create!(topic_link: post.topic.topic_links.first, ip_address: "192.168.1.1")
expect(TopicLink.topic_map(Guardian.new, post.topic_id).count).to eq(1)
expect(TopicLink.counts_for(Guardian.new, post.topic, [post]).length).to eq(1)
category.set_permissions(staff: :full)
category.save
admin = Fabricate(:admin)
expect(TopicLink.topic_map(Guardian.new, post.topic_id).count).to eq(0)
expect(TopicLink.topic_map(Guardian.new(admin), post.topic_id).count).to eq(1)
expect(TopicLink.counts_for(Guardian.new, post.topic, [post]).length).to eq(0)
expect(TopicLink.counts_for(Guardian.new(admin), post.topic, [post]).length).to eq(1)
end
it "does not include links from whisper" do
url = "https://blog.codinghorror.com/hacker-hack-thyself/"
post = Fabricate(:post, raw: "whisper post... #{url}", post_type: Post.types[:whisper])
TopicLink.extract_from(post)
expect(TopicLink.topic_map(Guardian.new, post.topic_id).count).to eq(0)
end
it "secures internal links correctly" do
other_topic = Fabricate(:topic)
other_user = Fabricate(:user)
url = "http://#{test_uri.host}/t/topic-slug/#{other_topic.id}"
post = Fabricate(:post, raw: "hello test topic #{url}")
TopicLink.extract_from(post)
TopicLinkClick.create!(topic_link: post.topic.topic_links.first, ip_address: "192.168.1.1")
expect(TopicLink.counts_for(Guardian.new(other_user), post.topic, [post]).length).to eq(1)
TopicUser.change(
other_user.id,
other_topic.id,
notification_level: TopicUser.notification_levels[:muted],
)
expect(TopicLink.counts_for(Guardian.new(other_user), post.topic, [post]).length).to eq(0)
end
end
describe ".duplicate_lookup" do
fab!(:user) { Fabricate(:user, username: "junkrat") }
let(:post_with_internal_link) do
Fabricate(:post, user: user, raw: "Check out this topic #{post.topic.url}/122131")
end
it "should return the right response" do
TopicLink.extract_from(post_with_internal_link)
result = TopicLink.duplicate_lookup(post_with_internal_link.topic)
expect(result.count).to eq(1)
lookup = result["test.localhost/t/#{post.topic.slug}/#{post.topic.id}/122131"]
expect(lookup[:domain]).to eq("test.localhost")
expect(lookup[:username]).to eq("junkrat")
expect(lookup[:posted_at].to_s).to eq(post_with_internal_link.created_at.to_s)
expect(lookup[:post_number]).to eq(1)
result = TopicLink.duplicate_lookup(post.topic)
expect(result).to eq({})
end
end
it "works with invalid link target" do
post =
Fabricate(
:post,
raw: 'http:geturl',
user: user,
topic: topic,
cook_method: Post.cook_methods[:raw_html],
)
expect { TopicLink.extract_from(post) }.to_not raise_error
end
end
end