--- a
+++ b/src/mediaserver/cdplugins/streamproxy.h
@@ -0,0 +1,49 @@
+/* Copyright (C) 2017-2018 J.F.Dockes
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef _STREAMPROXY_H_INCLUDED_
+#define _STREAMPROXY_H_INCLUDED_
+
+#include <memory>
+#include <functional>
+#include <string>
+#include <unordered_map>
+
+/// HTTP proxy for UPnP audio transfers
+///
+/// Uses microhttpd for the server part and libcurl for talking to the
+/// real server.
+///
+class StreamProxy {
+public:
+    enum UrlTransReturn {Error, Proxy, Redirect};
+    typedef std::function<UrlTransReturn
+                          (std::string& url,
+                           const std::unordered_map<std::string, std::string>&)>
+    UrlTransFunc;
+
+    StreamProxy(int listenport, UrlTransFunc urltrans);
+    ~StreamProxy();
+
+    void abortAll();
+
+    class Internal;
+private:
+    std::unique_ptr<Internal> m;
+};
+
+#endif /* _STREAMPROXY_H_INCLUDED_ */