Allow custom asset host to be passed in asset_url

2 files changed, 17 insertions, 1 deletions

diff --git a/actionview/lib/action_view/helpers/asset_url_helper.rb b/actionview/lib/action_view/helpers/asset_url_helper.rb
index 41997a85b3..86a84c1356 100644
--- a/actionview/lib/action_view/helpers/asset_url_helper.rb
+++ b/actionview/lib/action_view/helpers/asset_url_helper.rb
@@ -191,7 +191,8 @@ module ActionView
       # (proc or otherwise).
       def compute_asset_host(source = "", options = {})
         request = self.request if respond_to?(:request)
-        host = config.asset_host if defined? config.asset_host
+        host = options[:host]
+        host ||= config.asset_host if defined? config.asset_host
         host ||= request.base_url if request && options[:protocol] == :request
 
         if host.respond_to?(:call)
diff --git a/actionview/test/template/asset_tag_helper_test.rb b/actionview/test/template/asset_tag_helper_test.rb
index 18e4277d7a..343681b5a9 100644
--- a/actionview/test/template/asset_tag_helper_test.rb
+++ b/actionview/test/template/asset_tag_helper_test.rb
@@ -596,6 +596,10 @@ class AssetTagHelperNonVhostTest < ActionView::TestCase
     assert_equal "gopher://www.example.com", compute_asset_host("foo", :protocol => :request)
   end
 
+  def test_should_return_custom_host_if_passed_in_options
+    assert_equal "http://custom.example.com", compute_asset_host("foo", :host => "http://custom.example.com")
+  end
+
   def test_should_ignore_relative_root_path_on_complete_url
     assert_dom_equal(%(http://www.example.com/images/xml.png), image_path("http://www.example.com/images/xml.png"))
   end
@@ -759,4 +763,15 @@ class AssetUrlHelperEmptyModuleTest < ActionView::TestCase
     assert @module.config.asset_host
     assert_equal "http://www.example.com/foo", @module.asset_url("foo")
   end
+
+  def test_asset_url_with_custom_asset_host
+    @module.instance_eval do
+      def config
+        Struct.new(:asset_host).new("http://www.example.com")
+      end
+    end
+
+    assert @module.config.asset_host
+    assert_equal "http://custom.example.com/foo", @module.asset_url("foo", :host => "http://custom.example.com")
+  end
 end