下载文件。

downloadExportFile(blob, tagFileName) {
let downloadElement = document.createElement(‘a’);
let href = blob;
if (typeof blob == ‘string’) {
downloadElement.target = ‘_blank’;
} else {
href = window.URL.createObjectURL(blob); //创建下载的链接
}
downloadElement.href = href;
downloadElement.download = tagFileName; //下载后文件名
document.body.appendChild(downloadElement);
downloadElement.click(); //点击下载
document.body.removeChild(downloadElement); //下载完成移除元素
if (typeof blob != ‘string’) {
window.URL.revokeObjectURL(href); //释放掉blob对象
}
}
fileLinkToStreamDownload(url, fileName, type) {
let xhr = new XMLHttpRequest();
xhr.open(‘get’, url, true);
xhr.setRequestHeader(‘Content-Type’, application/${type});
xhr.responseType = ‘blob’;
let _this = this;
xhr.onload = function() {
if (this.status == 200) {
//接受二进制文件流
var blob = this.response;
let ua = navigator.userAgent;
if (ua.indexOf(‘Trident’) != -1 && ua.indexOf(‘Windows’) != -1) {
// IE内核 并且 windows系统 情况下 才执行;
navigator.msSaveBlob(blob, fileName);
} else if (ua.indexOf(‘Firefox’) > -1) {
//火狐兼容下载
_this.downloadExportFile(blob, fileName);
} else {
//谷歌兼容下载
_this.downloadExportFile(blob, fileName);
}
}
};
xhr.send();
}