Deno：处理tar存档导致校验和错误（标准库）

Question

我想借助tar.ts中的Standard Library处理tar存档。

可以通过以下代码将存档成功写入test.tar：

import { Tar, Untar } from "https://deno.land/std/archive/tar.ts";

// create tar archive
const tar = new Tar();
const content = new TextEncoder().encode("hello tar world!");
await tar.append("output.txt", {
  reader: new Deno.Buffer(content),
  contentSize: content.byteLength,
});
await Deno.writeFile("./test.tar", tar.out);

但是，读取tar会触发错误：

error: Uncaught Error: checksum error  
      throw new Error("checksum error");  
        --------^
    at Untar.extract (https://deno.land/std/archive/tar.ts:432:13)  
    at async file:///C:/Users/bela/Desktop/script/test.ts:23:16  

代码：

// read from tar archive
const untar = new Untar(await Deno.open("./test.tar"));
const buf = new Deno.Buffer();
const result = await untar.extract(buf); // <-- this line triggers error
const untarText = new TextDecoder("utf-8").decode(buf.bytes());

我错过了哪里？

Answer 1

const untar = new Untar(await Deno.open("./test.tar", { read: true }));
const buf = new Deno.Buffer();
const result = await untar.extract(buf); // <-- this line triggers error
const untarText = new TextDecoder("utf-8").decode(buf.bytes());
console.log(untarText);

[tar.out当前为零填充Uint8Array，似乎是标准代码中的错误