Read from a resource ID (
rid) into an array buffer (
Resolves to either the number of bytes read during the operation or EOF
null) if there was nothing more to read.
It is possible for a read to successfully return with
0 bytes. This does
not indicate EOF.
This function is one of the lowest level APIs and most users should not
work with this directly, but rather use
readAll() from https://deno.land/std/streams/conversion.ts instead.
It is not guaranteed that the full buffer will be read in a single call.
// if "/foo/bar.txt" contains the text "hello world": const file = await Deno.open("/foo/bar.txt"); const buf = new Uint8Array(100); const numberOfBytesRead = await Deno.read(file.rid, buf); // 11 bytes const text = new TextDecoder().decode(buf); // "hello world" Deno.close(file.rid);