我的网站上有些文件只有登录后才能“下载”。因此,当单击anchor
元素时,它需要附加authorization
标头,然后API返回blob
。为了添加授权标头,我使用了将href
元素上的anchor
替换为click
事件的解决方案。这是代码:
HTML
<a class="{{ anchorClasses }}" (click)="!downloadDocument(path)" href="">
<i *ngIf="iconClasses && iconClasses.length > 0" class="{{ iconClasses }}" aria-hidden="true"></i><span [innerHTML]="linkText"></span>
</a>
打字稿代码
downloadDocument(url: string) {
this.appDataService.spinnerService.show();
return this.anchorDocumentService.downloadDocument(url)
.subscribe((result: any) => {
this.downloadFileFromBlob(result, url);
return false;
}, (error: any) => {
console.error(error);
this.appDataService.spinnerService.hide();
this.appDataService.routeToErrorPage(error);
return false;
});
}
正如您将在订阅的函数成功回调中看到的那样,我立即调用“ downloadFileFromBlob”函数,即:
private downloadFileFromBlob(blob: any, url?: string) {
console.log('DownloadLinkComponent | downloadFileFromBlob...');
try {
const anchorDownloadUrl = window.URL.createObjectURL(blob);
const anchorDownload = document.createElement('a');
document.body.appendChild(anchorDownload);
anchorDownload.href = anchorDownloadUrl;
anchorDownload.setAttribute('style', 'display: none;');
anchorDownload.setAttribute('target', '_blank');
if (url && url.length > 0) {
anchorDownload.setAttribute('download', this.isDocumentService.getFilenameFromPath(url));
}
console.log('DownloadLinkComponent | downloadFileFromBlob | clicking the hidden download link...');
anchorDownload.click();
// anchorDownload.dispatchEvent(new MouseEvent('click', { bubbles: true, cancelable: true, view: window }));
window.URL.revokeObjectURL(anchorDownloadUrl);
} catch (error) {
this.appDataService.routeToErrorPage(error);
} finally {
this.appDataService.spinnerService.hide();
}
}
因此,在chrome
中,这很好用。但是在IE中,它在此行上引发了错误:
anchorDownload.click();
在IE中,显示的错误页面显示:
无法显示网页
Most likely cause: •Some content or files on this webpage require a program that you don't have installed.
在这里,我获得了添加身份验证标头的代码:How to set a header for a HTTP GET request, and trigger file download?
因此,在chrome
中,当点击事件触发时,它将blob下载到我的本地文件系统中,并且该文件的url
(也称为文件路径)被设置为{{1} }用于[隐藏]锚点事件。所以...为什么IE无法下载此文件?
答案 0 :(得分:0)
我不确定是否应该将其关闭,还是不确定答案的链接...所以这是我找到的答案的链接:
blob download not working in IE
此修补程序仅需两行代码:
if (navigator.appVersion.toString().indexOf('.NET') > 0)
window.navigator.msSaveBlob(blob, filename);
else
const anchorDownloadUrl = window.URL.createObjectURL(blob);
const anchorDownload = document.createElement('a');
// ... the rest of the code in the 'downloadFileFromBlog' function
因此,只需快速检查一下我们是否在IE中运行,如果是的话,只需调用保存功能即可。