void (*on_reply_success)(void *closure, void *request, struct json_object *result, const char *info);
void (*on_reply_fail)(void *closure, void *request, const char *status, const char *info);
void (*on_reply_success)(void *closure, void *request, struct json_object *result, const char *info);
void (*on_reply_fail)(void *closure, void *request, const char *status, const char *info);