1 files changed, 52 insertions, 0 deletions
diff --git a/spec/lib/gitlab/logging/cloudflare_helper_spec.rb b/spec/lib/gitlab/logging/cloudflare_helper_spec.rb
new file mode 100644
index 00000000000..2b73fb7bc1c
--- /dev/null
+++ b/spec/lib/gitlab/logging/cloudflare_helper_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Logging::CloudflareHelper do
+  let(:helper) do
+    Class.new do
+      include Gitlab::Logging::CloudflareHelper
+    end.new
+  end
+
+  describe '#store_cloudflare_headers!' do
+    let(:payload) { {} }
+    let(:env) { {} }
+    let(:request) { ActionDispatch::Request.new(env) }
+
+    before do
+      request.headers.merge!(headers)
+    end
+
+    context 'with normal headers' do
+      let(:headers) { { 'Cf-Ray' => '592f0aa22b3dea38-IAD', 'Cf-Request-Id' => SecureRandom.hex } }
+
+      it 'adds Cf-Ray-Id and Cf-Request-Id' do
+        helper.store_cloudflare_headers!(payload, request)
+
+        expect(payload[:cf_ray]).to eq(headers['Cf-Ray'])
+        expect(payload[:cf_request_id]).to eq(headers['Cf-Request-Id'])
+      end
+    end
+
+    context 'with header values with long strings' do
+      let(:headers) { { 'Cf-Ray' => SecureRandom.hex(33), 'Cf-Request-Id' => SecureRandom.hex(33) } }
+
+      it 'filters invalid header values' do
+        helper.store_cloudflare_headers!(payload, request)
+
+        expect(payload.keys).not_to include(:cf_ray, :cf_request_id)
+      end
+    end
+
+    context 'with header values with non-alphanumeric characters' do
+      let(:headers) { { 'Cf-Ray' => "Bad\u0000ray", 'Cf-Request-Id' => "Bad\u0000req" } }
+
+      it 'filters invalid header values' do
+        helper.store_cloudflare_headers!(payload, request)
+
+        expect(payload.keys).not_to include(:cf_ray, :cf_request_id)
+      end
+    end
+  end
+end