Commit 62d7219

"{\n \"name\": \"hi-sven\",\n \"version\": \"1.0.0\",\n \"description\": \"Say hi to Sven\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"\n },\n \"author\": \"Sven Sauleau <sven@sauleau.com>\",\n \"license\": \"MIT\"\n}\n"

"console.log(\"Hi Sven\");\n"

"# hi-sven\n"

"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\n"

// `size` is the exact file length; the 512-byte record padding after

// the content is handled by roundNextSector below.

const content = eat(size);

const { createHash } = require("crypto");

describe('preserves last byte of file content', () => {

// Build a minimal USTAR archive containing a single file. Field offsets and

// the space-then-sum checksum are per the USTAR spec (https://wiki.osdev.org/USTAR).

function buildUstarArchive(name, content) {

const HEADER_SIZE = 512;

const header = Buffer.alloc(HEADER_SIZE);

Buffer.from(name).copy(header, 0);

Buffer.from("0000644\0").copy(header, 100);

Buffer.from("0000000\0").copy(header, 108);

Buffer.from("0000000\0").copy(header, 116);

Buffer.from(content.length.toString(8).padStart(11, "0") + "\0").copy(header, 124);

Buffer.from("00000000000\0").copy(header, 136);

header[156] = 0x30;

Buffer.from("ustar\0").copy(header, 257);

Buffer.from("00").copy(header, 263);

header.fill(0x20, 148, 148 + 8);

let sum = 0;

for (let i = 0; i < HEADER_SIZE; i++) sum += header[i];

Buffer.from(sum.toString(8).padStart(6, "0") + "\0 ").copy(header, 148);

const padded = Buffer.alloc(Math.ceil(content.length / HEADER_SIZE) * HEADER_SIZE);

Buffer.from(content).copy(padded, 0);

return new Uint8Array(Buffer.concat([header, padded, Buffer.alloc(HEADER_SIZE * 2)]));

}

async function extract(tar) {

const parser = new USTarParser();

let received = null;

parser.on("file", (name, content) => { received = { name, content }; });

await parser.parse(tar);

return received;

}

it("keeps the last byte when it is a printable non-newline character", async () => {

const content = Buffer.from("hello, world}");

const got = await extract(buildUstarArchive("file.txt", content));

assert.equal(got.content.length, content.length);

assert.deepEqual([...got.content], [...content]);

});

it("keeps the last byte when it is 0x00", async () => {

const content = Buffer.from([0x01, 0x02, 0x00]);

const got = await extract(buildUstarArchive("bin", content));

assert.equal(got.content.length, content.length);

assert.deepEqual([...got.content], [...content]);

});

it("keeps the last byte when it is 0x0a", async () => {

const content = Buffer.from("line one\nline two\n");

const got = await extract(buildUstarArchive("multi.txt", content));

assert.equal(got.content.length, content.length);

assert.deepEqual([...got.content], [...content]);

});

// Regression for https://github.com/cdnjs/cdnjs/issues/14305 — real

// fa-regular-400.woff2 extracted from @fortawesome/fontawesome-free@7.3.0.

it("extracts a real font-awesome .woff2 byte-exact against upstream", async () => {

const UPSTREAM_SIZE = 19480;

const UPSTREAM_SHA256 = "f4f5cc8867d30647f0ad918c01599fa8aa9657c39eb55f0fc610120986544385";

const tar = new Uint8Array(readFileSync(join("fixtures", "fa-regular-400.tar")));

const got = await extract(tar);

assert.equal(got.name, "package/webfonts/fa-regular-400.woff2");

assert.equal(got.content.length, UPSTREAM_SIZE);

assert.equal(

createHash("sha256").update(Buffer.from(got.content)).digest("hex"),

UPSTREAM_SHA256

);

assert.deepEqual([...got.content.slice(0, 4)], [0x77, 0x4f, 0x46, 0x32]);

});