fixed url parsing when they contain a slash in query string

config/initializers/core_ext.rb

@@ -0,0 +1,25 @@
+# See test_url_with_slash_in_query_string_are_parsed_correctly in test/functional/todos_controller_test.rb
+# and http://blog.swivel.com/code/2009/06/rails-auto_link-and-certain-query-strings.html
+module ActionView::Helpers::TextHelper
+  remove_const :AUTO_LINK_RE
+  AUTO_LINK_RE = %r{
+              (                          # leading text
+                <\w+.*?>|                # leading HTML tag, or
+                [^=!:'"/]|               # leading punctuation, or
+                ^                        # beginning of line
+              )
+              (
+                (?:https?://)|           # protocol spec, or
+                (?:www\.)                # www.*
+              )
+              (
+                [-\w]+                   # subdomain or domain
+                (?:\.[-\w]+)*            # remaining subdomains or domain
+                (?::\d+)?                # port
+                (?:/(?:[~\w\+@%=\(\)-]|(?:[,.;:'][^\s$]))*)* # path
+                (?:\?[\w\+@%&=.;:/-]+)?     # query string
+                (?:\#[\w\-]*)?           # trailing anchor
+              )
+              ([[:punct:]]|<|$|)       # trailing text
+             }x
+end

test/functional/todos_controller_test.rb

@@ -519,5 +519,17 @@ class TodosControllerTest < ActionController::TestCase
     todo.reload()
     assert_equal "active", todo.state
   end
+  
+  def test_url_with_slash_in_query_string_are_parsed_correctly
+    # See http://blog.swivel.com/code/2009/06/rails-auto_link-and-certain-query-strings.html
+    login_as(:admin_user)
+    user = users(:admin_user)
+    todo = user.todos.first
+    url = "http://example.com/foo?bar=/baz"
+    todo.notes = "foo #{url} bar"
+    todo.save!
+    get :index
+    assert_select("a[href=#{url}]")
+  end
 
 end