自动从 HTML 传输文件
我正在构建一个 Web 应用程序，指导用户完成应用程序的配置和安装。 它动态构建一组配置文件，然后将它们与应用程序的安装程序一起以存档（.ZIP 文件）的形式发送。 该网页是从 Linux shell 脚本生成的（抱歉），出于安全原因，我希望直接从脚本发送文件，而不是作为链接发送，因此用户无法直接访问它。
过程如下：用户输入一些信息并且生成文件后，我想显示一个包含说明的页面，然后自动开始下载，而不要求用户单击“下载此文件”链接：
#!/bin/bash
echo_header_and_instructions # Standard HTML
<Magic HTML tag to start transfer> # ??? What goes here???
command_to_stream_the_files # Probably 'cat'
echo_end_tags # End the page.
谢谢你的帮助！
I'm building a web application that guides my users through the configuration and installation of an application. It builds a set of configuration files dynamically, then sends them in an archive (.ZIP file) along with an installer for the application. The web page is generated from a linux shell script (sorry), and for security reasons, I'd prefer the file be sent directly from the script, rather than as a link, so the user can't access it directly.
Here's the process: Once the user has entered some information, and the files have been generated, I want to display a page with instructions, then start the download automatically, without asking the user to click a "download this file" link:
#!/bin/bash
echo_header_and_instructions # Standard HTML
<Magic HTML tag to start transfer> # ??? What goes here???
command_to_stream_the_files # Probably 'cat'
echo_end_tags # End the page.
Thanks for your help!
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我认为你真的不能这么做。
您可以通过以下标头强制下载文件，但据我所知，您不能混合 HTML 和文件下载。
标题：
内容长度不是强制性的，但使用它可以确保下载对话框可以显示还有多少文件需要下载。
您可以做的一件事是使用 javascript 重新加载页面。 因为该页面是文件下载，所以原始 HTML 页面将保留在原处：
<html> <head> <title>This is the page containing information</title> <script type="text/javascript"> window.onload = function(){ document.location = 'somefile.zip'; } </script> </head> <body> This page will stay visible while the file is being downloaded<br> </body> </html>You Can't really do that I think.
You can force the file download through the following headers but as far is I know you can't mix HTML and file download.
Headers:
The content length is not mandatory but using it will make sure that the download dialog box can show how much more file there is to download.
A thing you could do is reload the page using javascript. Because the page is a file download the original HTML page will stay in place:
<html> <head> <title>This is the page containing information</title> <script type="text/javascript"> window.onload = function(){ document.location = 'somefile.zip'; } </script> </head> <body> This page will stay visible while the file is being downloaded<br> </body> </html>我认为您可以使用 元标记 让浏览器提示用户下载文件进行刷新，但正如 Pim Jager 所说，我认为您无法通过一次传输来完成此操作。 你也许可以尝试做类似的事情：
I think you can make the browser prompt the user to download a file by using the meta tag to do a refresh, but as Pim Jager said I don't think you can do it with one transfer. You could maybe try doing something like:
一位朋友提供了魔法：使用
标签创建一个仅包含要下载的文件的“不可见”框架：A friend supplied the magic: use an
<iframe>tag to create an "invisible" frame that contains only the file to download: