# 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 subject.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