文件下载 数据流方法

 1 /**
 2  * get blob 下载文件方法
 3  * @param  {Number} time
 4  * @return {String}
 5  * @returns {Object} {time: Number, unit: any}
 6  */
 7 export function getDownload(value: any, defaultFileName: string, type: string) {
 8   const disposition = value.headers?.['content-disposition'];
 9   let fileName = defaultFileName;
10   if (disposition) {
11     const reg = /filename=(.*)/;
12     fileName = decodeURI(reg.exec(disposition)[1].trim());
13   }
14   const blob = new Blob([value.data], { type: type });
15   const url = window.URL.createObjectURL(blob);
16   const link = document.createElement('a');
17   link.style.display = 'none';
18   link.href = url;
19 
20   link.setAttribute('download', fileName);
21   document.body.appendChild(link);
22   link.click();
23   document.body.removeChild(link);
24   window.URL.revokeObjectURL(url);
25 }