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

1 files changed, 21 insertions, 0 deletions

diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index 9d50342867..585cad24db 100644
--- a/actionpack/CHANGELOG.md
+++ b/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