v6.0.0: вся обработка на бэкенде — zip.js удалён, фронт только XHR+скачивание
Deploy drhider / validate (push) Waiting to run

This commit is contained in:
2026-07-13 07:53:08 +04:00
parent cbf619aaba
commit e590d8ab9a
3 changed files with 8 additions and 123 deletions
-94
View File
@@ -1,94 +0,0 @@
/**
* Нативный ZIP — упаковка и распаковка без внешних библиотек.
*
* Использование:
* const files = await unzip(zipBlob); // {name: Blob, ...}
* const zip = await buildZip([{name, data}]); // Blob
*/
/**
* Распаковать ZIP blob → {filename: Blob}.
* Поддерживает только STORE (без сжатия) — как отдаёт drhider.
*/
async function unzip(zb) {
const buf = await zb.arrayBuffer();
const dv = new DataView(buf);
const files = {};
let pos = 0;
while (pos < buf.byteLength - 4) {
const sig = dv.getUint32(pos, true);
if (sig === 0x04034b50) {
// Local file header
const start = pos;
pos += 26;
const nameLen = dv.getUint16(pos, true);
pos += 2;
const extraLen = dv.getUint16(pos, true);
pos += 2;
const name = new TextDecoder().decode(
new Uint8Array(buf, pos, nameLen)
);
pos += nameLen + extraLen;
const compSize = dv.getUint32(start + 18, true);
files[name] = new Blob([new Uint8Array(buf, pos, compSize)]);
pos += compSize;
} else {
break; // Central directory или EOCD — конец файлов
}
}
return files;
}
/**
* Создать ZIP blob из entries [{name, data}].
* Метод: STORE (без сжатия), UTF-8 имена.
*/
async function buildZip(entries) {
const parts = [];
const centralDir = [];
let offset = 0;
for (const e of entries) {
const data = new Uint8Array(await e.data.arrayBuffer());
const nameBytes = new TextEncoder().encode(e.name);
// Local file header (30 bytes + filename)
const lh = new Uint8Array(30 + nameBytes.length);
const lv = new DataView(lh.buffer);
lv.setUint32(0, 0x04034b50, true); // signature
lv.setUint16(6, 0x800, true); // flags: UTF-8
lv.setUint32(18, data.length, true); // compressed size
lv.setUint32(22, data.length, true); // uncompressed size
lv.setUint16(26, nameBytes.length, true);
lh.set(nameBytes, 30);
parts.push(lh, data);
// Central directory entry (46 bytes + filename)
const ce = new Uint8Array(46 + nameBytes.length);
const cv = new DataView(ce.buffer);
cv.setUint32(0, 0x02014b50, true);
cv.setUint16(8, 0x800, true);
cv.setUint32(20, data.length, true);
cv.setUint32(24, data.length, true);
cv.setUint16(28, nameBytes.length, true);
cv.setUint32(42, offset, true);
ce.set(nameBytes, 46);
centralDir.push(ce);
offset += 30 + nameBytes.length + data.length;
}
// End of central directory (22 bytes)
const cdSize = centralDir.reduce((s, c) => s + c.length, 0);
const eocd = new Uint8Array(22);
const ev = new DataView(eocd.buffer);
ev.setUint32(0, 0x06054b50, true);
ev.setUint16(8, entries.length, true);
ev.setUint16(10, entries.length, true);
ev.setUint32(12, cdSize, true);
ev.setUint32(16, offset, true);
return new Blob([...parts, ...centralDir, eocd], { type: 'application/zip' });
}