1 files changed, 24 insertions, 0 deletions
diff --git a/lib/gitlab/middleware/webpack_proxy.rb b/lib/gitlab/middleware/webpack_proxy.rb
new file mode 100644
index 00000000000..3fe32adeade
--- /dev/null
+++ b/lib/gitlab/middleware/webpack_proxy.rb
@@ -0,0 +1,24 @@
+# This Rack middleware is intended to proxy the webpack assets directory to the
+# webpack-dev-server.  It is only intended for use in development.
+
+module Gitlab
+  module Middleware
+    class WebpackProxy < Rack::Proxy
+      def initialize(app = nil, opts = {})
+        @proxy_host = opts.fetch(:proxy_host, 'localhost')
+        @proxy_port = opts.fetch(:proxy_port, 3808)
+        @proxy_path = opts[:proxy_path] if opts[:proxy_path]
+        super(app, opts)
+      end
+
+      def perform_request(env)
+        unless @proxy_path && env['PATH_INFO'].start_with?("/#{@proxy_path}")
+          return @app.call(env)
+        end
+
+        env['HTTP_HOST'] = "#{@proxy_host}:#{@proxy_port}"
+        super(env)
+      end
+    end
+  end
+end