带有 302 重定向的内容处理 [英] Content-Disposition with 302 redirect
问题描述
昨晚这还有效，但我一定是不小心更改了一些东西，因为现在不行了.
This was working last night, but I must have accidentally changed something, because it isn't now.
从这些标题中应该清楚我想要做什么:
What I am trying to do should be clear from these headers:
Content-Disposition: attachment;filename=english_customizable.xml
Location: http://tortoisewrath.com/files/2.xml
但是，当发送此标头时，Content-Disposition 部分在重定向后不起作用.
However, when this header is sent, the Content-Disposition part doesn't work after the redirect.
...为什么?
推荐答案
你试图做的是不明智的检查这个问题；标题位置 + 内容配置
What you're trying to do is inadvisable check this question; Header Location + Content Disposition
内容配置 + 位置标题
但是你可以做到，为了让它工作，你必须在发送之前缓冲你的整个响应.你可以用输出缓冲来做到这一点
But you can do it, to make it work you will have to buffer your whole response before sending it. You can do this with output buffering
否则浏览器可能会在下载文件之前解释 Location 标头.无论哪种方式都很粗略，所以你不应该想要这样做.
Else the browser may interpret the Location header before the file is downloaded. It's sketchy either way, so you shouldn't want to do this.
请注意使用Content-Disposition:attachment;强制另存为"将确保客户端不会去/导航任何地方，因此下面的方法无论如何，它自己的应该没问题.
Please note that forcing 'save as' using Content-Disposition: attachment; will make sure the client doesn't go/navigate anywhere, so the method below on its own should be fine in any case.
在 php 中流式传输文件
引用一个头脑正确的人:
// To use header() with 'content-type', why don't you use mime_content_type() function rather than checking the type on the basis of extension?
// Example code:
<?php
$file="test.docx";
header("Pragma: public");
header('Content-disposition: attachment; filename='.$file);
header("Content-type: ".mime_content_type($file));
header('Content-Encoding: identity');
ob_clean();
flush();
readfile($file);
?>
// Use $file to map to whichever type of file.
// Note: the mime types should already be defined in apache settings
来源:http://www.php.net/manual/en/function.header.php#107581
请注意，原始答案使用了 Content-Transfer-Encoding，它实际上并不存在于 HTTP 中.该来源下方的评论对此进行了解释:http://www.php.net/manual/en/function.header.php#107044
Note that the original answer used Content-Transfer-Encoding which doesn't actually exist in HTTP. The comment below that source explains it: http://www.php.net/manual/en/function.header.php#107044
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