--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include <string>
+
+extern std::string url_escape(const std::string& s);
+extern std::string url_unescape(const std::string& s);