42 lines
1.2 KiB
TypeScript
Executable File
42 lines
1.2 KiB
TypeScript
Executable File
/**
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* 处理文件下载功能
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* @param url - 要下载的文件URL，可能为undefined
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* @throws {Error} 当URL无效或下载过程中发生错误时抛出异常
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*/
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export const handleDownload = (url: string | undefined): void => {
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if (!url) {
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throw new Error("Invalid URL provided for download");
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}
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const link = document.createElement("a");
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try {
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link.href = url;
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link.download = extractFileNameFromUrl(url);
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link.style.display = "none"; // 避免影响页面布局
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document.body.appendChild(link);
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link.click();
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} finally {
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// 确保无论成功与否都清理DOM元素
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if (link) {
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document.body.removeChild(link);
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}
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}
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};
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/**
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* 从URL中提取文件名，若无法提取则返回随机文件名
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* @param url - 文件URL
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* @returns 提取的文件名或随机文件名
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*/
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const extractFileNameFromUrl = (url: string): string => {
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const fileName = url.split("/").pop();
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return fileName ? fileName : generateRandomFileName();
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};
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/**
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* 生成随机文件名
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* @returns 随机文件名
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*/
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const generateRandomFileName = (): string => {
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const randomString = Math.random().toString(36).substring(2, 15);
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return `file_${randomString}`;
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}; |