FIX: Topic#featured_link_root_domain extracts URL before parsing.

app/controllers/posts_controller.rb

@@ -133,7 +133,6 @@ class PostsController < ApplicationController
   end
 
   def create
-
     @manager_params = create_params
     @manager_params[:first_post_checks] = !is_api?
 

app/models/topic.rb

@@ -1267,7 +1267,14 @@ SQL
   end
 
   def featured_link_root_domain
-    MiniSuffix.domain(URI.parse(self.featured_link).hostname)
+    url = URI.extract(self.featured_link).first
+
+    begin
+      MiniSuffix.domain(URI.parse(url).hostname)
+    rescue URI::InvalidURIError => e
+      Rails.logger.warn("#{e.message}: #{e.backtrace.join("\n")}")
+      nil
+    end
   end
 
   private

spec/models/topic_spec.rb

@@ -2099,12 +2099,14 @@ describe Topic do
   describe '#featured_link_root_domain' do
     let(:topic) { Fabricate.build(:topic) }
 
-    it 'should extract the root domain correctly' do
     [
       "https://meta.discourse.org",
       "https://meta.discourse.org/",
-        "https://meta.discourse.org/?filter=test"
+      "https://meta.discourse.org/?filter=test",
+      "https://meta.discourse.org/ there might be text",
+      "http://meta.discourse.org/\u0441",
     ].each do |featured_link|
+      it "should extract the root domain from #{featured_link} correctly" do
         topic.featured_link = featured_link
         expect(topic.featured_link_root_domain).to eq("discourse.org")
       end