# frozen_string_literal: true
RSpec.describe RetrieveTitle do
describe ".extract_title" do
it "will extract the value from the title tag" do
title = RetrieveTitle.extract_title("My Cool Title")
expect(title).to eq("My Cool Title")
end
it "will strip whitespace" do
title = RetrieveTitle.extract_title(" Another Title\n\n ")
expect(title).to eq("Another Title")
end
it "will pick og:title if title is missing" do
title = RetrieveTitle.extract_title(<<~HTML)
HTML
expect(title).to eq("Good Title")
end
it "will prefer the title over the opengraph tag" do
title = RetrieveTitle.extract_title(<<~HTML)
Good Title
HTML
expect(title).to eq("Good Title")
end
it "will parse a YouTube url from javascript" do
title = RetrieveTitle.extract_title(<<~HTML)
YouTube
HTML
expect(title).to eq("Video Title")
end
it "will not exception out for invalid html" do
attributes = (1..1000).map { |x| " attr#{x}='1' " }.join
title = RetrieveTitle.extract_title <<~HTML
test
HTML
expect(title).to eq(nil)
end
end
describe ".crawl" do
it "can properly extract a title from a url" do
stub_request(:get, "https://brelksdjflaskfj.com/amazing").to_return(
status: 200,
body: "very amazing",
)
# we still resolve the IP address for every host
IPSocket.stubs(:getaddress).returns("100.2.3.4")
expect(RetrieveTitle.crawl("https://brelksdjflaskfj.com/amazing")).to eq("very amazing")
end
it "detects and uses encoding from Content-Type header" do
stub_request(:get, "https://brelksdjflaskfj.com/amazing").to_return(
status: 200,
body: "fancy apostrophes ’’’".dup.force_encoding("ASCII-8BIT"),
headers: {
"Content-Type" => 'text/html; charset="utf-8"',
},
)
IPSocket.stubs(:getaddress).returns("100.2.3.4")
expect(RetrieveTitle.crawl("https://brelksdjflaskfj.com/amazing")).to eq(
"fancy apostrophes ’’’",
)
stub_request(:get, "https://brelksdjflaskfj.com/amazing").to_return(
status: 200,
body:
"japanese こんにちは website".encode("EUC-JP").force_encoding(
"ASCII-8BIT",
),
headers: {
"Content-Type" => "text/html;charset=euc-jp",
},
)
IPSocket.stubs(:getaddress).returns("100.2.3.4")
expect(RetrieveTitle.crawl("https://brelksdjflaskfj.com/amazing")).to eq(
"japanese こんにちは website",
)
end
it "can follow redirect" do
stub_request(:get, "http://foobar.com/amazing").to_return(
status: 301,
body: "",
headers: {
"location" => "https://wikipedia.com/amazing",
},
)
stub_request(:get, "https://wikipedia.com/amazing").to_return(
status: 200,
body: "very amazing",
headers: {
},
)
IPSocket.stubs(:getaddress).returns("100.2.3.4")
expect(RetrieveTitle.crawl("http://foobar.com/amazing")).to eq("very amazing")
end
it "returns empty title if redirect uri is in blacklist" do
SiteSetting.blocked_onebox_domains = "wikipedia.com"
stub_request(:get, "http://foobar.com/amazing").to_return(
status: 301,
body: "",
headers: {
"location" => "https://wikipedia.com/amazing",
},
)
stub_request(:get, "https://wikipedia.com/amazing").to_return(
status: 200,
body: "very amazing",
headers: {
},
)
expect(RetrieveTitle.crawl("http://foobar.com/amazing")).to eq(nil)
end
it "doesn't return title if a blocked domain is encountered anywhere in the redirect chain" do
SiteSetting.blocked_onebox_domains = "wikipedia.com"
stub_request(:get, "http://foobar.com/amazing").to_return(
status: 301,
body: "",
headers: {
"location" => "https://wikipedia.com/amazing",
},
)
stub_request(:get, "https://wikipedia.com/amazing").to_return(
status: 301,
body: "",
headers: {
"location" => "https://cat.com/meow",
},
)
stub_request(:get, "https://cat.com/meow").to_return(
status: 200,
body: "very amazing",
headers: {
},
)
expect(RetrieveTitle.crawl("http://foobar.com/amazing")).to be_blank
end
it "doesn't return title if the Discourse-No-Onebox header == 1" do
stub_request(:get, "https://cat.com/meow/no-onebox").to_return(
status: 200,
body: "discourse stay away",
headers: {
"Discourse-No-Onebox" => "1",
},
)
expect(RetrieveTitle.crawl("https://cat.com/meow/no-onebox")).to be_blank
end
it "doesn't return a title if response is unsuccessful" do
stub_request(:get, "https://example.com").to_return(status: 404, body: "")
expect(RetrieveTitle.crawl("https://example.com")).to eq(nil)
end
it "it raises errors other than Net::ReadTimeout, e.g. NoMethodError" do
stub_request(:get, "https://example.com").to_raise(NoMethodError)
expect { RetrieveTitle.crawl("https://example.com") }.to raise_error(NoMethodError)
end
it "it ignores Net::ReadTimeout errors" do
stub_request(:get, "https://example.com").to_raise(Net::ReadTimeout)
expect(RetrieveTitle.crawl("https://example.com")).to eq(nil)
end
it "ignores SSRF lookup errors" do
described_class.stubs(:fetch_title).raises(FinalDestination::SSRFDetector::LookupFailedError)
expect(RetrieveTitle.crawl("https://example.com")).to eq(nil)
end
end
describe ".fetch_title" do
it "does not parse broken title tag" do
# webmock does not do chunks
stub_request(:get, "https://en.wikipedia.org/wiki/Internet").to_return(
status: 200,
body: "Internet - Wikipedia</ti",
headers: {
},
)
title = RetrieveTitle.fetch_title("https://en.wikipedia.org/wiki/Internet")
expect(title).to eq(nil)
end
it "can parse correct title tag" do
# webmock does not do chunks
stub_request(:get, "https://en.wikipedia.org/wiki/Internet").to_return(
status: 200,
body: "<html><head><title>Internet - Wikipedia",
headers: {
},
)
title = RetrieveTitle.fetch_title("https://en.wikipedia.org/wiki/Internet")
expect(title).to eq("Internet - Wikipedia")
end
end
end