File System Access 批量重命名与去重策略实践

概述通过目录选择器与摘要计算，可以进行重复文件识别与重命名处理。遍历与重命名async function hash(file) { const buf = await crypto.subtle.digest('SHA-256', await file.arrayBuffer()); return Array.from(new Uint8Array(buf)).map(x=>x.toString(16).padStart(2,'0')).join(''); }

async function renameInDir() {

const dir = await window.showDirectoryPicker();

const map = new Map();

for await (const [name, h] of dir.entries()) {

if (h.kind !== 'file') continue;

const f = await h.getFile();

const hex = await hash(f);

if (map.has(hex)) {

const newName = `${hex}-${name}`;

const nh = await dir.getFileHandle(newName, { create: true });

const w = await nh.createWritable();

await w.write(await f.arrayBuffer());

await w.close();

await dir.removeEntry(name);

} else { map.set(hex, name); }

}

}