typedef enum {
    URI_none,
    URI_URL,
    URI_URN,
    URI_Rel
} URIType;
 typedef struct {
    URIType tp;
    Strip scheme;
    Strip user;
    Strip passw;
    Strip host;
    Strip port;
    Strip path;
    Strip anchor;
    Strip search;
     int  is_dir;
} URI;