46 lines
1.3 KiB
TypeScript
46 lines
1.3 KiB
TypeScript
import { ElMessage } from 'element-plus'
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import { fetchAttachmentDownloadUrl } from '@/api/business'
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export type AttachmentDownloadItem = {
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fileUrl?: string
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fileName?: string
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}
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function triggerAnchorDownload(href: string, fileName: string) {
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const a = document.createElement('a')
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a.href = href
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a.download = fileName
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a.rel = 'noopener'
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document.body.appendChild(a)
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a.click()
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document.body.removeChild(a)
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}
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/** 附件下载：优先走后端预签名 URL，保证跨域场景下保留原始文件名与后缀。 */
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export async function downloadAttachmentFile(
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file: AttachmentDownloadItem,
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options?: { fullFileUrl?: (url: string) => string }
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) {
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const fileUrl = String(file.fileUrl || '').trim()
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if (!fileUrl) return
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const fileName = String(file.fileName || '').trim() || fileUrl.split('/').pop() || 'download'
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try {
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const res = await fetchAttachmentDownloadUrl({ fileUrl, fileName })
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if (res?.downloadUrl) {
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triggerAnchorDownload(res.downloadUrl, fileName)
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return
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}
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} catch {
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// 预签名失败时回退直连
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}
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const resolveUrl = options?.fullFileUrl || ((url: string) => url)
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const href = resolveUrl(fileUrl)
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if (!href) {
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ElMessage.error('无法下载附件')
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return
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}
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triggerAnchorDownload(href, fileName)
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}
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