如何强制下载文件提示而不是在浏览器中使用 HTML 显示它？
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How to force a Download File prompt instead of displaying it in-browser with HTML?
提问by UI_Dev
<a href="sample.pdf" target="_blank">Download</a>
If I click Download button, this target blank is opening a new window.
如果我单击“下载”按钮，则此目标空白将打开一个新窗口。
But I need it to prompt a dialog for saving this file. How can I achieve this?
但我需要它来提示保存此文件的对话框。我怎样才能做到这一点？
回答by Kostas Rousis
This is something that you cannot absolutely control with HTML itself.
这是您无法通过 HTML 本身完全控制的事情。
If the user is having a browser with PDF reading capabilities (or a plugin) and the corresponding settings to open PDF files in-browser, the PDF will open like that.
如果用户使用具有 PDF 阅读功能（或插件）的浏览器以及在浏览器中打开 PDF 文件的相应设置，则 PDF 将像这样打开。
The PDF opens in a new tab simple because of your target="_blank", which has nothing to do with a download prompt.
由于您的target="_blank"，PDF 在一个新选项卡中打开很简单，这与下载提示无关。
If you are using HTML5 you can use the download attribute:
如果您使用的是 HTML5，则可以使用下载属性：
<a href="sample.pdf" download="sample.pdf">Download</a>
If you have a back-end service which you can control or you feel like fiddling with your Web Server, you can always look for setting the right Content-Disposition. See this SO question for some nice discussion on Content-Disposition.
如果您有一个可以控制的后端服务，或者您想摆弄您的 Web 服务器，您可以随时寻找设置正确的Content-Disposition. 有关Content-Disposition 的一些不错的讨论，请参阅此 SO 问题。
