58 lines
1.8 KiB
TypeScript
58 lines
1.8 KiB
TypeScript
import {pow1024} from "./utils";
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/**
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* 通过Fetch API下载文件/图片（支持跨域/Blob处理）
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* @param {string} url 文件地址
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* @param {string} filename 保存的文件名
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*/
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export async function downloadWithFetch(url:string, filename:string = "") {
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try {
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const response = await fetch(url);
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if (!response.ok) throw new Error('The network is responding abnormally');
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const blob = await response.blob();
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const blobUrl = URL.createObjectURL(blob);
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if(!filename){
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filename = url.substring(url.lastIndexOf("/") + 1);
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}
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const link = document.createElement('a');
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link.href = blobUrl;
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link.download = filename;
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document.body.appendChild(link);
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link.click();
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// 清理内存
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setTimeout(() => {
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URL.revokeObjectURL(blobUrl);
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document.body.removeChild(link);
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}, 100);
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} catch (error) {
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console.error('下载失败:', error);
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}
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}
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/**
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* 文件大小 字节转换单位
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* @param {number} size
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* @returns {string|*}
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*/
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export const filterSize = (size:number): string | any => {
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if (!size) return '0B';
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if (size < pow1024(1)) return size + ' B';
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if (size < pow1024(2)) return (size / pow1024(1)).toFixed(2) + ' KB';
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if (size < pow1024(3)) return (size / pow1024(2)).toFixed(2) + ' MB';
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if (size < pow1024(4)) return (size / pow1024(3)).toFixed(2) + ' GB';
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return (size / pow1024(4)).toFixed(2) + ' TB'
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}
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export const getServiceStaticFile = (url:string):string => {
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if(!url) return "";
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if(url.startsWith("blob:") || url.startsWith("data:") || url.startsWith("http:") || url.startsWith("https:") || url.startsWith('/file/static')) return url;
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return `/file/static` + (url[0] === '/' ? '' : '/') + url;
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}
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