From c4a83b5454a3516b630b38cd8e8472f2166fc986 Mon Sep 17 00:00:00 2001
From: Brian Weaver <cmdrclueless@gmail.com>
Date: Thu, 16 Apr 2015 16:20:57 -0400
Subject: [PATCH] Fix broken IPv6 addresses handling

---
 actionpack/lib/action_dispatch/http/url.rb    |  2 +-
 .../dispatch/routing/ipv6_redirect_test.rb    | 45 +++++++++++++++++++
 2 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 actionpack/test/dispatch/routing/ipv6_redirect_test.rb

diff --git a/actionpack/lib/action_dispatch/http/url.rb b/actionpack/lib/action_dispatch/http/url.rb
index f5b709ccd6..350ef147e0 100644
--- a/actionpack/lib/action_dispatch/http/url.rb
+++ b/actionpack/lib/action_dispatch/http/url.rb
@@ -5,7 +5,7 @@ module ActionDispatch
   module Http
     module URL
       IP_HOST_REGEXP  = /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/
-      HOST_REGEXP     = /(^[^:]+:\/\/)?([^:]+)(?::(\d+$))?/
+      HOST_REGEXP     = /(^[^:]+:\/\/)?(\[[^\]]+\]|[^:]+)(?::(\d+$))?/
       PROTOCOL_REGEXP = /^([^:]+)(:)?(\/\/)?$/
 
       mattr_accessor :tld_length
diff --git a/actionpack/test/dispatch/routing/ipv6_redirect_test.rb b/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
new file mode 100644
index 0000000000..f1b2e8cfc7
--- /dev/null
+++ b/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
@@ -0,0 +1,45 @@
+require 'abstract_unit'
+
+class IPv6IntegrationTest < ActionDispatch::IntegrationTest
+  Routes = ActionDispatch::Routing::RouteSet.new
+  include Routes.url_helpers
+
+  class ::BadRouteRequestController < ActionController::Base
+    include Routes.url_helpers
+    def index
+      render :text => foo_path
+    end
+
+    def foo
+      redirect_to :action => :index
+    end
+  end
+
+  Routes.draw do
+    get "/",    :to => 'bad_route_request#index', :as => :index
+    get "/foo", :to => "bad_route_request#foo", :as => :foo
+  end
+
+  def _routes
+    Routes
+  end
+
+  APP = build_app Routes
+  def app
+    APP
+  end
+
+  test "bad IPv6 redirection" do
+    #   def test_simple_redirect
+    request_env = {
+      'REMOTE_ADDR' => 'fd07:2fa:6cff:2112:225:90ff:fec7:22aa',
+      'HTTP_HOST'   => '[fd07:2fa:6cff:2112:225:90ff:fec7:22aa]:3000',
+      'SERVER_NAME' => '[fd07:2fa:6cff:2112:225:90ff:fec7:22aa]',
+      'SERVER_PORT' => 3000 }
+
+    get '/foo', env: request_env
+    assert_response :redirect
+    assert_equal 'http://[fd07:2fa:6cff:2112:225:90ff:fec7:22aa]:3000/', redirect_to_url
+  end
+
+end