add Content-Type header of raw image file

Add Content-Type header to fix a bug which IE can't show image in
markdown when the image is from raw.

	modified:   CHANGELOG
	modified:   app/controllers/projects/raw_controller.rb
	modified:   spec/controllers/projects/raw_controller_spec.rb

1 files changed, 14 insertions, 0 deletions

diff --git a/spec/controllers/projects/raw_controller_spec.rb b/spec/controllers/projects/raw_controller_spec.rb
index 1f921d5f05d..c114f342021 100644
--- a/spec/controllers/projects/raw_controller_spec.rb
+++ b/spec/controllers/projects/raw_controller_spec.rb
@@ -19,5 +19,19 @@ describe Projects::RawController do
             to eq("inline")
       end
     end
+
+    context 'image header' do
+      let(:id) { 'master/files/images/6049019_460s.jpg' }
+
+      it 'set image content type header' do
+        get(:show,
+            namespace_id: public_project.namespace.to_param,
+            project_id: public_project.to_param,
+            id: id)
+
+        expect(response.status).to eq(200)
+        expect(response.header['Content-Type']).to eq('image/jpeg')
+      end
+    end
   end
 end