Add asynchronous page content request

cgi-bin/malp.rb

@@ -79,6 +79,19 @@ if cgi.request_method == "POST" && !authenticated
   end
 end
 
+if cgi.params.key?("content")
+  if authenticated
+    cgi.out("type" => "text/html", "charset" => "UTF-8") do
+      "<p>Content placeholder</p>"
+    end
+  else
+    cgi.out("Status" => "403 Forbidden", "type" => "text/plain", "charset" => "UTF-8") do
+      "Forbidden"
+    end
+  end
+  exit
+end
+
 template = ERB.new(File.read(File.join(ASSETS_DIR, "page.erb")))
 
 out_params = { "type" => "text/html", "charset" => "UTF-8" }