如何强制下载HTML / JavaScript？ [英] How do I force download with HTML/JavaScript?

问题描述

我有一个链接，如果用户点击它，我需要两件事情发生：

I have a link and, if a user clicks it, I need 2 things to happen:

• 发送适当的HTTP响应给用户（特别是 Content-Type：video / mp4 ）


• ，视频文件将自动开始下载。

我已经看到了一些PHP的类型，但是只有HTML / JavaScript才有可能吗？

I have seen something of the sort with PHP, but is it possible only with HTML/JavaScript?

推荐答案

自动将取决于浏览器及其选项。但是您可以通过发生什么（然后再与用户进行双重检查） rfc2183.txtrel =nofollow noreferrer> Content-Disposition 在响应中的标题。例如，在大多数浏览器上，将它设置为 attachment; filename = blah.mp4 ，即使浏览器通常会使用户下载它（使用该文件名）试图在自己的界面中显示/播放内容。有关详细信息，请参阅链接。 （下载可能是mp4文件的默认设置，但这取决于用户;当提供HTML文件的下载链接时，我觉得有用）。

Automatically will depend a lot on the browser and its options. But you can tell the browser what you want to have happen (which it will then double-check with the user) via the Content-Disposition header in the response. For instance, setting it to attachment;filename=blah.mp4 will, on most browsers, invite the user to download it (using that filename) even if normally the browser would have tried to display/play the content in its own interface. See the link for details. (Downloading is probably the default for mp4 files, but that's up to the user; I find this helpful when offering download links for HTML files.)

您可以设置标题如果您不使用服务器端脚本（如您所说的那样），通过Web服务器中的配置。例如，使用Apache，您将使用与这些视频文件的URL匹配的规则，并使用 标题指令。

You can set the header via configuration in your web server if you're not using server-side scripting (as you've said you're not). For instance, with Apache you'd use a rule matching the URL for these video files and use the Header directive.

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