Content-Disposition 下载文件名解析与 FSA 保存实践

概述通过解析 `Content-Disposition` 获取服务器建议文件名，并完成本地保存。解析与保存function parseFilename(cd) { if (!cd) return 'download'; const m = cd.match(/filename\*=UTF-8''([^;]+)|filename="?([^";]+)"?/i); return decodeURIComponent(m?.[1] || m?.[2] || 'download'); } async function saveResponse(url) { const res = await fetch(url); const name = parseFilename(res.headers.get('Content-Disposition')); const h = await window.showSaveFilePicker({ suggestedName: name }); const ws = await h.createWritable(); const ab = await res.arrayBuffer(); await ws.write(new Uint8Array(ab)); await ws.close(); }