How to get bytes bigger than 1024 from int httpd_req_recv(httpd_req_t *r, char *buf, size_t buf_len) (IDFGH-14202)

How to get bytes bigger than 1024 from int httpd_req_recv(httpd_req_t *r, char *buf, size_t buf_len) (IDFGH-14202) #84851