71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
import { Message } from "element-ui";
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const file = {
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/** 下载文件
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* @param data {blob} 文件流
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* @param filename {String} 文件名称
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*/
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downloadFileByBlob: (data, filename) => {
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if (!data) {
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return false;
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}
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if (!!window.ActiveXObject || "ActiveXObject" in window) {
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window.navigator.msSaveOrOpenBlob(new Blob([data]), filename);
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} else {
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const url = window.URL.createObjectURL(new Blob([data]));
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const link = document.createElement("a");
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link.style.display = "none";
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link.href = url;
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link.setAttribute("download", filename);
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document.body.appendChild(link);
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link.click();
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document.body.removeChild(link);
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}
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},
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/** 下载文件
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* @param url {String} 文件下载地址
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* @param filename {String} 文件名称
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*/
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downloadFileByUrl: (url, filename) => {
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if (!!window.ActiveXObject || "ActiveXObject" in window) {
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window.navigator.msSaveOrOpenBlob(url, filename);
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} else {
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const link = document.createElement("a");
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link.style.display = "none";
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link.href = url;
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link.setAttribute("download", filename);
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document.body.appendChild(link);
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link.click();
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document.body.removeChild(link);
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}
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},
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dealBase64ToBlob(base64Url) {
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// 截取base64的数据内容（去掉前面的描述信息，类似这样的一段：data:image/png;base64,）并解码为2进制数据
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let bstr = atob(base64Url.split(",")[1]);
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// 获取解码后的二进制数据的长度，用于后面创建二进制数据容器
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let olength = bstr.length;
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// 创建一个Uint8Array类型的数组以存放二进制数据
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var u8arr = new Uint8Array(olength);
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// 将二进制数据存入Uint8Array类型的数组中
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while (olength--) {
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u8arr[olength] = bstr.charCodeAt(olength);
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}
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// 创建blob对象
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let blob = new Blob([u8arr]);
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return blob;
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},
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// 获取文件扩展名
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getFileExtension: (fileName) => {
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const fileNameSplited = fileName.split(".");
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return fileNameSplited[fileNameSplited.length - 1].toLowerCase();
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},
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getFileName: (fileName) => {
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return filename.substring(0, filename.lastIndexOf("."));
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},
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};
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export default file;
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