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b0656f3ed0
The `blocked onebox domains` setting lets site owners change what sites are allowed to be oneboxed. When a link is entered into a post, Discourse checks the domain of the link against that setting and blocks the onebox if the domain is blocked. But if there's a chain of redirects, then only the final destination website is checked against the site setting. This commit amends that behavior so that every website in the redirect chain is checked against the site setting, and if anything is blocked the original link doesn't onebox at all in the post. The `Discourse-No-Onebox` header is also checked in every response and the onebox is blocked if the header is set to "1". Additionally, Discourse will now include the `Discourse-No-Onebox` header with every response if the site requires login to access content. This is done to signal to a Discourse instance that it shouldn't attempt to onebox other Discourse instances if they're login-only. Non-Discourse websites can also use include that header if they don't wish to have Discourse onebox their content. Internal ticket: t59305.
270 lines
10 KiB
Ruby
270 lines
10 KiB
Ruby
# frozen_string_literal: true
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describe InlineOneboxer do
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it "should return nothing with empty input" do
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expect(InlineOneboxer.new([]).process).to be_blank
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end
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it "can onebox a topic" do
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topic = Fabricate(:topic)
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results = InlineOneboxer.new([topic.url], skip_cache: true).process
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expect(results).to be_present
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expect(results[0][:url]).to eq(topic.url)
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expect(results[0][:title]).to eq(topic.title)
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end
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it "doesn't onebox private messages" do
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topic = Fabricate(:private_message_topic)
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results = InlineOneboxer.new([topic.url], skip_cache: true).process
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expect(results).to be_blank
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end
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context "caching" do
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fab!(:topic) { Fabricate(:topic) }
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before do
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InlineOneboxer.invalidate(topic.url)
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end
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it "puts an entry in the cache" do
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SiteSetting.enable_inline_onebox_on_all_domains = true
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url = "https://example.com/good-url"
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stub_request(:get, url).to_return(status: 200, body: "<html><head><title>a blog</title></head></html>")
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InlineOneboxer.invalidate(url)
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expect(InlineOneboxer.cache_lookup(url)).to be_blank
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result = InlineOneboxer.lookup(url)
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expect(result[:title]).to be_present
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cached = InlineOneboxer.cache_lookup(url)
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expect(cached[:url]).to eq(url)
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expect(cached[:title]).to eq('a blog')
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end
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end
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context ".lookup" do
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let(:category) { Fabricate(:private_category, group: Group[:staff]) }
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let(:category2) { Fabricate(:private_category, group: Group[:staff]) }
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let(:admin) { Fabricate(:admin) }
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it "can lookup private topics if in same category" do
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topic = Fabricate(:topic, category: category)
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topic1 = Fabricate(:topic, category: category)
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topic2 = Fabricate(:topic, category: category2)
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# Link to `topic` from new topic (same category)
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onebox = InlineOneboxer.lookup(topic.url, user_id: admin.id, category_id: category.id, skip_cache: true)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq(topic.url)
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expect(onebox[:title]).to eq(topic.title)
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# Link to `topic` from `topic`
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onebox = InlineOneboxer.lookup(topic.url, user_id: admin.id, category_id: topic.category_id, topic_id: topic.id, skip_cache: true)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq(topic.url)
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expect(onebox[:title]).to eq(topic.title)
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# Link to `topic` from `topic1` (same category)
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onebox = InlineOneboxer.lookup(topic.url, user_id: admin.id, category_id: topic1.category_id, topic_id: topic1.id, skip_cache: true)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq(topic.url)
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expect(onebox[:title]).to eq(topic.title)
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# Link to `topic` from `topic2` (different category)
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onebox = InlineOneboxer.lookup(topic.url, user_id: admin.id, category_id: topic2.category_id, topic_id: topic2.id, skip_cache: true)
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expect(onebox).to be_blank
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end
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it "can lookup one link at a time" do
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topic = Fabricate(:topic)
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onebox = InlineOneboxer.lookup(topic.url, skip_cache: true)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq(topic.url)
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expect(onebox[:title]).to eq(topic.title)
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end
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it "returns nothing for unknown links" do
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expect(InlineOneboxer.lookup(nil)).to be_nil
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expect(InlineOneboxer.lookup("/test")).to be_nil
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end
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it "will return the fancy title" do
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topic = Fabricate(:topic, title: "Hello :pizza: with an emoji")
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onebox = InlineOneboxer.lookup(topic.url, skip_cache: true)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq(topic.url)
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expect(onebox[:title]).to eq("Hello 🍕 with an emoji")
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end
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it "will append the post number post author's username to the title" do
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topic = Fabricate(:topic, title: "Inline oneboxer")
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Fabricate(:post, topic: topic) # OP
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Fabricate(:post, topic: topic)
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lookup = -> (number) do
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InlineOneboxer.lookup(
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"#{topic.url}/#{number}",
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skip_cache: true
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)[:title]
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end
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posts = topic.reload.posts.order("post_number ASC")
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expect(lookup.call(0)).to eq("Inline oneboxer")
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expect(lookup.call(1)).to eq("Inline oneboxer")
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expect(lookup.call(2)).to eq("Inline oneboxer - #2 by #{posts[1].user.username}")
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Fabricate(:post, topic: topic, post_type: Post.types[:whisper])
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posts = topic.reload.posts.order("post_number ASC")
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# because the last post in the topic is a whisper, the onebox title
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# will be the first regular post directly before our whisper
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expect(lookup.call(3)).to eq("Inline oneboxer - #2 by #{posts[1].user.username}")
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expect(lookup.call(99)).to eq("Inline oneboxer - #2 by #{posts[1].user.username}")
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Fabricate(:post, topic: topic)
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posts = topic.reload.posts.order("post_number ASC")
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# username not appended to whisper posts
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expect(lookup.call(3)).to eq("Inline oneboxer - #3")
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expect(lookup.call(4)).to eq("Inline oneboxer - #4 by #{posts[3].user.username}")
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expect(lookup.call(99)).to eq("Inline oneboxer - #4 by #{posts[3].user.username}")
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end
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it "will not crawl domains that aren't allowlisted" do
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SiteSetting.enable_inline_onebox_on_all_domains = false
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onebox = InlineOneboxer.lookup("https://eviltrout.com", skip_cache: true)
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expect(onebox).to be_blank
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end
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it "will crawl anything if allowed to" do
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SiteSetting.enable_inline_onebox_on_all_domains = true
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stub_request(:get, "https://eviltrout.com/some-path").
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to_return(status: 200, body: "<html><head><title>a blog</title></head></html>")
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onebox = InlineOneboxer.lookup(
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"https://eviltrout.com/some-path",
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skip_cache: true
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)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq("https://eviltrout.com/some-path")
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expect(onebox[:title]).to eq("a blog")
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end
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it "will not return a onebox if it does not meet minimal length" do
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SiteSetting.enable_inline_onebox_on_all_domains = true
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stub_request(:get, "https://eviltrout.com/some-path").
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to_return(status: 200, body: "<html><head><title>a</title></head></html>")
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onebox = InlineOneboxer.lookup(
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"https://eviltrout.com/some-path",
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skip_cache: true
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)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq("https://eviltrout.com/some-path")
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expect(onebox[:title]).to eq(nil)
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end
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it "will lookup allowlisted domains" do
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SiteSetting.allowed_inline_onebox_domains = "eviltrout.com"
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RetrieveTitle.stubs(:crawl).returns("Evil Trout's Blog")
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onebox = InlineOneboxer.lookup(
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"https://eviltrout.com/some-path",
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skip_cache: true
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)
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expect(onebox).to be_present
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expect(onebox[:url]).to eq("https://eviltrout.com/some-path")
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expect(onebox[:title]).to eq("Evil Trout's Blog")
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end
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describe "lookups for blocked domains in the hostname" do
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shared_examples "blocks the domain" do |setting, domain_to_test|
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it "does not retrieve title" do
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stub_request(:get, domain_to_test)
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.to_return(
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status: 200,
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body: "<html><head><title>hello world</title></head></html>",
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)
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SiteSetting.blocked_onebox_domains = setting
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onebox = InlineOneboxer.lookup(domain_to_test, skip_cache: true)
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expect(onebox).to be_blank
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end
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end
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shared_examples "does not fulfil blocked domain" do |setting, domain_to_test|
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it "retrieves title" do
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stub_request(:get, domain_to_test)
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.to_return(
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status: 200,
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body: "<html><head><title>hello world</title></head></html>",
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)
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SiteSetting.blocked_onebox_domains = setting
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onebox = InlineOneboxer.lookup(domain_to_test, skip_cache: true)
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expect(onebox[:title]).to be_present
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end
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end
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include_examples "blocks the domain", "api.cat.org|kitten.cloud", "https://api.cat.org"
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include_examples "blocks the domain", "api.cat.org|kitten.cloud", "http://kitten.cloud"
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include_examples "blocks the domain", "kitten.cloud", "http://cat.kitten.cloud"
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include_examples "blocks the domain", "api.cat.org", "https://api.cat.org/subdirectory/moar"
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include_examples "blocks the domain", "kitten.cloud", "https://cat.kitten.cloud/subd"
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include_examples "does not fulfil blocked domain", "kitten.cloud", "https://cat.2kitten.cloud"
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include_examples "does not fulfil blocked domain", "kitten.cloud", "https://cat.kitten.cloud9"
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include_examples "does not fulfil blocked domain", "api.cat.org", "https://api-cat.org"
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it "doesn't retrieve title if a blocked domain is encountered anywhere in the redirect chain" do
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SiteSetting.blocked_onebox_domains = "redirect.com"
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stub_request(:get, "https://mainwebsite.com/blah")
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.to_return(status: 301, body: "", headers: { "location" => "https://redirect.com/blah" })
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stub_request(:get, "https://redirect.com/blah")
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.to_return(status: 301, body: "", headers: { "location" => "https://finalwebsite.com/blah" })
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stub_request(:get, "https://finalwebsite.com/blah")
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.to_return(status: 200, body: "<html><head><title>hello world</title></head></html>")
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onebox = InlineOneboxer.lookup("https://mainwebsite.com/blah", skip_cache: true)
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expect(onebox[:title]).to be_blank
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end
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it "doesn't retrieve title if the Discourse-No-Onebox header == 1" do
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stub_request(:get, "https://mainwebsite.com/blah")
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.to_return(
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status: 200,
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body: "<html><head><title>hello world</title></head></html>",
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headers: { "Discourse-No-Onebox" => "1" }
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)
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onebox = InlineOneboxer.lookup("https://mainwebsite.com/blah", skip_cache: true)
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expect(onebox[:title]).to be_blank
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stub_request(:get, "https://mainwebsite.com/blah/2")
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.to_return(
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status: 301,
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body: "",
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headers: { "location" => "https://mainwebsite.com/blah/2/redirect" }
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)
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stub_request(:get, "https://mainwebsite.com/blah/2/redirect")
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.to_return(
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status: 301,
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body: "",
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headers: { "Discourse-No-Onebox" => "1", "location" => "https://somethingdoesnotmatter.com" }
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)
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onebox = InlineOneboxer.lookup("https://mainwebsite.com/blah/2", skip_cache: true)
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expect(onebox[:title]).to be_blank
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onebox = InlineOneboxer.lookup("https://mainwebsite.com/blah/2/redirect", skip_cache: true)
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expect(onebox[:title]).to be_blank
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end
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end
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end
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end
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