Compare host scheme using case-insensitive regexp

Before:

    image_tag("HTTP://google.com")
    # => "<img alt=\"Google\" src=\"/assets/HTTP://google.com\" />"
    image_tag("http://google.com")
    # => "<img alt=\"Google\" src=\"http://google.com\" />"

After:

    image_tag("HTTP://google.com")
    # => "<img alt=\"Google\" src=\"HTTP://google.com\" />"
    image_tag("http://google.com")
    # => "<img alt=\"Google\" src=\"http://google.com\" />"

Backport of #10969

actionpack/CHANGELOG.md

@@ -1,5 +1,26 @@
 ## unreleased ##
 
+*   Use a case insensitive URI Regexp for #asset_path.
+
+    This fix a problem where the same asset path using different case are generating
+    different URIs.
+
+    Before:
+
+        image_tag("HTTP://google.com")
+        # => "<img alt=\"Google\" src=\"/assets/HTTP://google.com\" />"
+        image_tag("http://google.com")
+        # => "<img alt=\"Google\" src=\"http://google.com\" />"
+
+    After:
+
+        image_tag("HTTP://google.com")
+        # => "<img alt=\"Google\" src=\"HTTP://google.com\" />"
+        image_tag("http://google.com")
+        # => "<img alt=\"Google\" src=\"http://google.com\" />"
+
+    *David Celis + Rafael Mendonça França*
+
 *   Fix explicit names on multiple file fields. If a file field tag has
     the multiple option, it is turned into an array field (appending `[]`),
     but if an explicit name is passed to `file_field` the `[]` is not

actionpack/lib/action_view/asset_paths.rb

@@ -43,7 +43,7 @@ module ActionView
     end
 
     def is_uri?(path)
-      path =~ %r{^[-a-z]+://|^(?:cid|data):|^//}
+      path =~ %r{^[-a-z]+://|^(?:cid|data):|^//}i
     end
 
   private

actionpack/test/template/asset_tag_helper_test.rb

@@ -79,13 +79,17 @@ class AssetTagHelperTest < ActionView::TestCase
   JavascriptPathToTag = {
     %(javascript_path("xmlhr")) => %(/javascripts/xmlhr.js),
     %(javascript_path("super/xmlhr")) => %(/javascripts/super/xmlhr.js),
-    %(javascript_path("/super/xmlhr.js")) => %(/super/xmlhr.js)
+    %(javascript_path("/super/xmlhr.js")) => %(/super/xmlhr.js),
+    %(javascript_path("http://www.outside.com/foo.js")) => %(http://www.outside.com/foo.js),
+    %(javascript_path("HTTP://www.outside.com/foo.js")) => %(HTTP://www.outside.com/foo.js)
   }
 
   PathToJavascriptToTag = {
     %(path_to_javascript("xmlhr")) => %(/javascripts/xmlhr.js),
     %(path_to_javascript("super/xmlhr")) => %(/javascripts/super/xmlhr.js),
-    %(path_to_javascript("/super/xmlhr.js")) => %(/super/xmlhr.js)
+    %(path_to_javascript("/super/xmlhr.js")) => %(/super/xmlhr.js),
+    %(path_to_javascript("http://www.outside.com/foo.js")) => %(http://www.outside.com/foo.js),
+    %(path_to_javascript("HTTP://www.outside.com/foo.js")) => %(HTTP://www.outside.com/foo.js)
   }
 
   JavascriptIncludeToTag = {
@@ -109,14 +113,18 @@ class AssetTagHelperTest < ActionView::TestCase
     %(stylesheet_path("bank")) => %(/stylesheets/bank.css),
     %(stylesheet_path("bank.css")) => %(/stylesheets/bank.css),
     %(stylesheet_path('subdir/subdir')) => %(/stylesheets/subdir/subdir.css),
-    %(stylesheet_path('/subdir/subdir.css')) => %(/subdir/subdir.css)
+    %(stylesheet_path('/subdir/subdir.css')) => %(/subdir/subdir.css),
+    %(stylesheet_path("http://www.outside.com/foo.css")) => %(http://www.outside.com/foo.css),
+    %(stylesheet_path("HTTP://www.outside.com/foo.css")) => %(HTTP://www.outside.com/foo.css)
   }
 
   PathToStyleToTag = {
     %(path_to_stylesheet("style")) => %(/stylesheets/style.css),
     %(path_to_stylesheet("style.css")) => %(/stylesheets/style.css),
     %(path_to_stylesheet('dir/file')) => %(/stylesheets/dir/file.css),
-    %(path_to_stylesheet('/dir/file.rcss')) => %(/dir/file.rcss)
+    %(path_to_stylesheet('/dir/file.rcss')) => %(/dir/file.rcss),
+    %(path_to_stylesheet("http://www.outside.com/foo.css")) => %(http://www.outside.com/foo.css),
+    %(path_to_stylesheet("HTTP://www.outside.com/foo.css")) => %(HTTP://www.outside.com/foo.css)
   }
 
   StyleLinkToTag = {
@@ -139,14 +147,18 @@ class AssetTagHelperTest < ActionView::TestCase
     %(image_path("xml"))          => %(/images/xml),
     %(image_path("xml.png"))      => %(/images/xml.png),
     %(image_path("dir/xml.png"))  => %(/images/dir/xml.png),
-    %(image_path("/dir/xml.png")) => %(/dir/xml.png)
+    %(image_path("/dir/xml.png")) => %(/dir/xml.png),
+    %(image_path("http://www.outside.com/foo.png")) => %(http://www.outside.com/foo.png),
+    %(image_path("HTTP://www.outside.com/foo.png")) => %(HTTP://www.outside.com/foo.png)
   }
 
   PathToImageToTag = {
     %(path_to_image("xml"))          => %(/images/xml),
     %(path_to_image("xml.png"))      => %(/images/xml.png),
     %(path_to_image("dir/xml.png"))  => %(/images/dir/xml.png),
-    %(path_to_image("/dir/xml.png")) => %(/dir/xml.png)
+    %(path_to_image("/dir/xml.png")) => %(/dir/xml.png),
+    %(path_to_image("http://www.outside.com/foo.png")) => %(http://www.outside.com/foo.png),
+    %(path_to_image("HTTP://www.outside.com/foo.png")) => %(HTTP://www.outside.com/foo.png)
   }
 
   ImageLinkToTag = {
@@ -181,14 +193,18 @@ class AssetTagHelperTest < ActionView::TestCase
     %(video_path("xml"))          => %(/videos/xml),
     %(video_path("xml.ogg"))      => %(/videos/xml.ogg),
     %(video_path("dir/xml.ogg"))  => %(/videos/dir/xml.ogg),
-    %(video_path("/dir/xml.ogg")) => %(/dir/xml.ogg)
+    %(video_path("/dir/xml.ogg")) => %(/dir/xml.ogg),
+    %(video_path("http://www.outside.com/foo.ogg")) => %(http://www.outside.com/foo.ogg),
+    %(video_path("HTTP://www.outside.com/foo.ogg")) => %(HTTP://www.outside.com/foo.ogg)
   }
 
   PathToVideoToTag = {
     %(path_to_video("xml"))          => %(/videos/xml),
     %(path_to_video("xml.ogg"))      => %(/videos/xml.ogg),
     %(path_to_video("dir/xml.ogg"))  => %(/videos/dir/xml.ogg),
-    %(path_to_video("/dir/xml.ogg")) => %(/dir/xml.ogg)
+    %(path_to_video("/dir/xml.ogg")) => %(/dir/xml.ogg),
+    %(path_to_video("http://www.outside.com/foo.ogg")) => %(http://www.outside.com/foo.ogg),
+    %(path_to_video("HTTP://www.outside.com/foo.ogg")) => %(HTTP://www.outside.com/foo.ogg)
   }
 
   VideoLinkToTag = {
@@ -211,14 +227,18 @@ class AssetTagHelperTest < ActionView::TestCase
     %(audio_path("xml"))          => %(/audios/xml),
     %(audio_path("xml.wav"))      => %(/audios/xml.wav),
     %(audio_path("dir/xml.wav"))  => %(/audios/dir/xml.wav),
-    %(audio_path("/dir/xml.wav")) => %(/dir/xml.wav)
+    %(audio_path("/dir/xml.wav")) => %(/dir/xml.wav),
+    %(audio_path("http://www.outside.com/foo.wav")) => %(http://www.outside.com/foo.wav),
+    %(audio_path("HTTP://www.outside.com/foo.wav")) => %(HTTP://www.outside.com/foo.wav)
   }
 
   PathToAudioToTag = {
     %(path_to_audio("xml"))          => %(/audios/xml),
     %(path_to_audio("xml.wav"))      => %(/audios/xml.wav),
     %(path_to_audio("dir/xml.wav"))  => %(/audios/dir/xml.wav),
-    %(path_to_audio("/dir/xml.wav")) => %(/dir/xml.wav)
+    %(path_to_audio("/dir/xml.wav")) => %(/dir/xml.wav),
+    %(path_to_audio("http://www.outside.com/foo.wav")) => %(http://www.outside.com/foo.wav),
+    %(path_to_audio("HTTP://www.outside.com/foo.wav")) => %(HTTP://www.outside.com/foo.wav)
   }
 
   AudioLinkToTag = {