DEV: Load SVG sprites during system spec runs (#19497)

Co-authored-by: David Taylor <david@taylorhq.com>

lib/discourse.rb

@@ -498,16 +498,20 @@ module Discourse
     SiteSetting.force_https? ? "https" : "http"
   end
 
-  def self.base_url_no_prefix
+  def self.current_hostname_with_port
     default_port = SiteSetting.force_https? ? 443 : 80
-    url = +"#{base_protocol}://#{current_hostname}"
-    url << ":#{SiteSetting.port}" if SiteSetting.port.to_i > 0 && SiteSetting.port.to_i != default_port
+    result = +"#{current_hostname}"
+    result << ":#{SiteSetting.port}" if SiteSetting.port.to_i > 0 && SiteSetting.port.to_i != default_port
 
     if Rails.env.development? && SiteSetting.port.blank?
-      url << ":#{ENV["UNICORN_PORT"] || 3000}"
+      result << ":#{ENV["UNICORN_PORT"] || 3000}"
     end
 
-    url
+    result
+  end
+
+  def self.base_url_no_prefix
+    "#{base_protocol}://#{current_hostname_with_port}"
   end
 
   def self.base_url

lib/middleware/enforce_hostname.rb

@@ -18,7 +18,7 @@ module Middleware
       requested_hostname = env[Rack::HTTP_HOST]
 
       env[Discourse::REQUESTED_HOSTNAME] = requested_hostname
-      env[Rack::HTTP_HOST] = allowed_hostnames.find { |h| h == requested_hostname } || Discourse.current_hostname
+      env[Rack::HTTP_HOST] = allowed_hostnames.find { |h| h == requested_hostname } || Discourse.current_hostname_with_port
 
       @app.call(env)
     end

spec/support/system_helpers.rb

@@ -22,7 +22,8 @@ module SystemHelpers
   def setup_system_test
     SiteSetting.login_required = false
     SiteSetting.content_security_policy = false
-    SiteSetting.force_hostname = "#{Capybara.server_host}:#{Capybara.server_port}"
+    SiteSetting.force_hostname = Capybara.server_host
+    SiteSetting.port = Capybara.server_port
     SiteSetting.external_system_avatars_enabled = false
   end