From a413606f199875f1d4640cf2482ee9608aa0a05d Mon Sep 17 00:00:00 2001
From: Gustav Munkby <grddev@gmail.com>
Date: Fri, 25 Oct 2013 11:04:58 +0200
Subject: Handle cross-host redirects with plain Net::HTTP

---
 lib/bundler/fetcher.rb                          |  7 ++++-
 spec/install/gems/dependency_api_spec.rb        | 34 +++++++++++++++++++++++++
 spec/support/artifice/endpoint_host_redirect.rb | 15 +++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 spec/support/artifice/endpoint_host_redirect.rb

diff --git a/lib/bundler/fetcher.rb b/lib/bundler/fetcher.rb
index f5ad0347e7..951cc95200 100644
--- a/lib/bundler/fetcher.rb
+++ b/lib/bundler/fetcher.rb
@@ -203,7 +203,12 @@ module Bundler
         else
           req = Net::HTTP::Get.new uri.request_uri
           req.basic_auth(uri.user, uri.password) if uri.user && uri.password
-          response = @connection.request(req)
+          if uri.host == @connection.address && uri.port == @connection.port
+            connection = @connection
+          else
+            connection = Net::HTTP.new(uri.host, uri.port)
+          end
+          response = connection.request(req)
         end
       rescue OpenSSL::SSL::SSLError
         raise CertificateFailureError.new(@public_uri)
diff --git a/spec/install/gems/dependency_api_spec.rb b/spec/install/gems/dependency_api_spec.rb
index c88fdcc2d2..093b314e5f 100644
--- a/spec/install/gems/dependency_api_spec.rb
+++ b/spec/install/gems/dependency_api_spec.rb
@@ -162,6 +162,40 @@ describe "gemcutter's dependency API" do
     should_be_installed "rack 1.0.0"
   end
 
+  it "handles host redirects" do
+    gemfile <<-G
+      source "#{source_uri}"
+      gem "rack"
+    G
+
+    bundle :install, :artifice => "endpoint_host_redirect"
+    should_be_installed "rack 1.0.0"
+  end
+
+  it "handles host redirects without Net::HTTP::Persistent" do
+    gemfile <<-G
+      source "#{source_uri}"
+      gem "rack"
+    G
+
+    FileUtils.mkdir_p lib_path
+    File.open(lib_path("disable_net_http_persistent.rb"), "w") do |h|
+      h.write <<-H
+        module Kernel
+          alias require_without_disabled_net_http require
+          def require(*args)
+            raise LoadError, 'simulated' if args.first == 'openssl' && !caller.grep(/vendored_persistent/).empty?
+            require_without_disabled_net_http(*args)
+          end
+        end
+      H
+    end
+
+    bundle :install, :artifice => "endpoint_host_redirect", :requires => [lib_path("disable_net_http_persistent.rb")]
+    expect(out).to_not match(/Too many redirects/)
+    should_be_installed "rack 1.0.0"
+  end
+
   it "timeouts when Bundler::Fetcher redirects too much" do
     gemfile <<-G
       source "#{source_uri}"
diff --git a/spec/support/artifice/endpoint_host_redirect.rb b/spec/support/artifice/endpoint_host_redirect.rb
new file mode 100644
index 0000000000..e44d63e2a6
--- /dev/null
+++ b/spec/support/artifice/endpoint_host_redirect.rb
@@ -0,0 +1,15 @@
+require File.expand_path("../endpoint", __FILE__)
+
+Artifice.deactivate
+
+class EndpointHostRedirect < Endpoint
+  get "/fetch/actual/gem/:id", :host_name => 'localgemserver.test' do
+    redirect "http://bundler.localgemserver.test#{request.path_info}"
+  end
+
+  get "/api/v1/dependencies" do
+    status 404
+  end
+end
+
+Artifice.activate_with(EndpointHostRedirect)
-- 
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