// errors: -1, or negative HTTP status code
USING(url_ready_func, void (entity handle, entity pass, float status));
+ERASEABLE
void url_single_fopen(string url, float mode, url_ready_func rdy, entity pass);
+ERASEABLE
void url_fclose(entity e);
+ERASEABLE
string url_fgets(entity e);
+ERASEABLE
void url_fputs(entity e, string s);
// returns true if handled
+ERASEABLE
float url_URI_Get_Callback(int id, float status, string data);
#define MIN_URL_ID URI_GET_URLLIB
#define NUM_URL_ID (URI_GET_URLLIB_END - URI_GET_URLLIB + 1)
+ERASEABLE
void url_multi_fopen(string url, float mode, url_ready_func rdy, entity pass);