import { downloadByData } from '@jnpf/utils';
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/** 从 Content-Disposition 解析文件名 */
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export function fileNameFromDisposition(disposition?: string | null, fallback = 'export.xls') {
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if (!disposition) return fallback;
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const utf8 = /filename\*\s*=\s*UTF-8''([^;]+)/i.exec(disposition);
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if (utf8?.[1]) {
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try {
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return decodeURIComponent(utf8[1].trim().replace(/"/g, ''));
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} catch {
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return utf8[1].trim().replace(/"/g, '');
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}
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}
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const plain = /filename\s*=\s*("?)([^";]+)\1/i.exec(disposition);
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if (plain?.[2]) {
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try {
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return decodeURIComponent(plain[2].trim());
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} catch {
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return plain[2].trim();
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}
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}
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return fallback;
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}
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/** 保存后端导出的 Excel 流（axios 原生响应） */
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export async function saveExportBlob(res: any, fallbackName: string) {
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const headers = res?.headers || {};
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const disposition = headers['content-disposition'] || headers['Content-Disposition'];
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const blob: Blob =
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res?.data instanceof Blob
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? res.data
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: new Blob([res?.data], { type: 'application/vnd.ms-excel;charset=utf-8' });
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// 业务错误时常返回 JSON blob
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if (blob.type && blob.type.includes('application/json')) {
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const text = await blob.text();
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let msg = '导出失败';
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try {
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const json = JSON.parse(text);
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msg = json.msg || json.message || msg;
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} catch {
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// ignore
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}
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throw new Error(msg);
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}
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const fileName = fileNameFromDisposition(disposition, fallbackName);
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downloadByData(blob, fileName, 'application/vnd.ms-excel;charset=utf-8');
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}
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