import { BufReader } from "https://dotland.deno.dev/x/dejs@0.10.1/vendor/https/deno.land/std/io/bufio.ts";
reads data into p. It returns the number of bytes read into p. The bytes are taken from at most one Read on the underlying Reader, hence n may be less than len(p). To read exactly len(p) bytes, use io.ReadFull(b, p).