http://www.gnupdf.org/flyspray/index.php?do=details&task_id=126
libcurl has an easy implementation which would encode the path strings curl_easy_escape curl_easy_unescape There are other implementations in "wget" project which can be ported to gnu pdf. glib project has "g_uri_escape_string" but it seemed to me more like RFC3986 implementation, which doesn't involve escaping "<scheme>:<scheme-resource>" . Let me know if this dependency to libcurl is acceptable to gnupdf project ? . Regards -- Harshavardhana
