FIX: Do not download emojis in pull_hotlinked_images

app/jobs/regular/pull_hotlinked_images.rb

@@ -156,7 +156,10 @@ module Jobs
 
       # If file is on the forum or CDN domain
       if Discourse.store.has_been_uploaded?(src) || src =~ /\A\/[^\/]/i
-        # Return true if we can't find the upload in the db
+        return false if src =~ /\/images\/emoji\//
+
+        # Someone could hotlink a file from a different site on the same CDN,
+        # so check whether we have it in this database
         return !Upload.get_from_url(src)
       end
 

spec/jobs/pull_hotlinked_images_spec.rb

@@ -191,6 +191,11 @@ describe Jobs::PullHotlinkedImages do
         expect(subject.should_download_image?(src)).to eq(true)
       end
 
+      it "returns false for emoji" do
+        src = Emoji.url_for("testemoji.png")
+        expect(subject.should_download_image?(src)).to eq(false)
+      end
+
       it 'returns false for valid remote URLs' do
         expect(subject.should_download_image?("http://meta.discourse.org")).to eq(false)
       end