res = http_response_init("RTSP/1.0", 401, "Unauthorized");
http_response_add_header(res, "WWW-Authenticate", authstr);
free(authstr);
res = http_response_init("RTSP/1.0", 401, "Unauthorized");
http_response_add_header(res, "WWW-Authenticate", authstr);
free(authstr);