1 files changed, 87 insertions, 0 deletions
diff --git a/spec/support/shared_examples/controllers/hotlink_interceptor_shared_examples.rb b/spec/support/shared_examples/controllers/hotlink_interceptor_shared_examples.rb
new file mode 100644
index 00000000000..93a394387a3
--- /dev/null
+++ b/spec/support/shared_examples/controllers/hotlink_interceptor_shared_examples.rb
@@ -0,0 +1,87 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples "hotlink interceptor" do
+  let(:http_request) { nil }
+  let(:headers) { nil }
+
+  describe "DDOS prevention" do
+    using RSpec::Parameterized::TableSyntax
+
+    context "hotlinked as media" do
+      where(:response_status, :accept_header) do
+        # These are default formats in modern browsers, and IE
+        :ok | "*/*"
+        :ok | "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
+        :ok | "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"
+        :ok | "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
+        :ok | "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"
+        :ok | "image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/x-shockwave-flash, application/msword, */*"
+        :ok | "text/html, application/xhtml+xml, image/jxr, */*"
+        :ok | "text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/webp, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1"
+
+        # These are image request formats
+        :not_acceptable | "image/webp,*/*"
+        :not_acceptable | "image/png,image/*;q=0.8,*/*;q=0.5"
+        :not_acceptable | "image/webp,image/apng,image/*,*/*;q=0.8"
+        :not_acceptable | "image/png,image/svg+xml,image/*;q=0.8, */*;q=0.5"
+
+        # Video request formats
+        :not_acceptable | "video/webm,video/ogg,video/*;q=0.9,application/ogg;q=0.7,audio/*;q=0.6,*/*;q=0.5"
+
+        # Audio request formats
+        :not_acceptable | "audio/webm,audio/ogg,audio/wav,audio/*;q=0.9,application/ogg;q=0.7,video/*;q=0.6,*/*;q=0.5"
+
+        # CSS request formats
+        :not_acceptable | "text/css,*/*;q=0.1"
+        :not_acceptable | "text/css"
+        :not_acceptable | "text/css,*/*;q=0.1"
+      end
+
+      with_them do
+        let(:headers) do
+          { "Accept" => accept_header }
+        end
+
+        before do
+          request.headers.merge!(headers) if request.present?
+        end
+
+        it "renders the response" do
+          http_request
+
+          expect(response).to have_gitlab_http_status(response_status)
+        end
+      end
+    end
+
+    context "hotlinked as a script" do
+      where(:response_status, :fetch_mode) do
+        # Standard navigation fetch modes
+        :ok | "navigate"
+        :ok | "nested-navigate"
+        :ok | "same-origin"
+
+        # Fetch modes when linking as JS
+        :not_acceptable | "cors"
+        :not_acceptable | "no-cors"
+        :not_acceptable | "websocket"
+      end
+
+      with_them do
+        let(:headers) do
+          { "Sec-Fetch-Mode" => fetch_mode }
+        end
+
+        before do
+          request.headers.merge!(headers) if request.present?
+        end
+
+        it "renders the response" do
+          http_request
+
+          expect(response).to have_gitlab_http_status(response_status)
+        end
+      end
+    end
+  end
+end