class ActionDispatch::Journey::Router::Utils

def self.normalize_path(path)

normalize_path("/%ab") # => "/%AB"
normalize_path("") # => "/"
normalize_path("foo") # => "/foo"
normalize_path("/foo/") # => "/foo"
normalize_path("/foo") # => "/foo"

Also converts downcase URL encoded string to uppercase.
Strips off trailing slash and ensures there is a leading slash.

Normalizes URI path.
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def self.normalize_path(path)
  path ||= ""
  encoding = path.encoding
  path = +"/#{path}"
  path.squeeze!("/")
  unless path == "/"
    path.delete_suffix!("/")
    path.gsub!(/(%[a-f0-9]{2})/) { $1.upcase }
  end
  path.force_encoding(encoding)
end