ShuaixinHuangandmorluto
fc24b08851
* feat(artifacts): read Zstandard-compressed ZIP members * fix(artifacts): classify ZIP dictionary failures --------- Co-authored-by: morluto <76467478+morluto@users.noreply.github.com>
45 lines
1.7 KiB
TypeScript
45 lines
1.7 KiB
TypeScript
import { crc32, zstdCompressSync } from "node:zlib";
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/** One non-Zip64 member, independently framed from the PKWARE APPNOTE records. */
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export const zstandardZipFixture = (
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content: Buffer,
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options: {
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readonly method?: number;
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readonly crc?: number;
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readonly declaredSize?: number;
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readonly compressed?: Buffer;
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} = {},
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): Buffer => {
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const name = Buffer.from("member.txt");
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const compressed = options.compressed ?? zstdCompressSync(content);
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const method = options.method ?? 93;
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const checksum = options.crc ?? crc32(content);
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const declaredSize = options.declaredSize ?? content.length;
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const local = Buffer.alloc(30);
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local.writeUInt32LE(0x04034b50, 0);
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local.writeUInt16LE(63, 4);
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local.writeUInt16LE(method, 8);
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local.writeUInt16LE(0x5021, 12); // 2020-01-01, DOS date.
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local.writeUInt32LE(checksum, 14);
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local.writeUInt32LE(compressed.length, 18);
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local.writeUInt32LE(declaredSize, 22);
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local.writeUInt16LE(name.length, 26);
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const central = Buffer.alloc(46);
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central.writeUInt32LE(0x02014b50, 0);
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central.writeUInt16LE(63, 4);
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central.writeUInt16LE(63, 6);
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central.writeUInt16LE(method, 10);
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central.writeUInt16LE(0x5021, 14);
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central.writeUInt32LE(checksum, 16);
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central.writeUInt32LE(compressed.length, 20);
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central.writeUInt32LE(declaredSize, 24);
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central.writeUInt16LE(name.length, 28);
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const end = Buffer.alloc(22);
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end.writeUInt32LE(0x06054b50, 0);
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end.writeUInt16LE(1, 8);
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end.writeUInt16LE(1, 10);
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end.writeUInt32LE(central.length + name.length, 12);
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end.writeUInt32LE(local.length + name.length + compressed.length, 16);
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return Buffer.concat([local, name, compressed, central, name, end]);
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};
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