打开下载的zip文件会创建cpgz文件吗？ [英] Opening downloaded zip file creates cpgz file?

问题描述

如果我为一个zip文件的url创建一个链接的 href 并单击该链接，我的zip文件会被下载并打开它获取我期望的内容。

If I make the url for a zip file the href of a link and click the link, my zip file gets downloaded and opening it gets the contents as I expect.

这是HTML：

<a href="http://mysite.com/uploads/my-archive.zip">download zip</a>

问题是我想指向我的应用程序的链接，以便我可以确定是否用户有权访问此zip文件。

The problem is I'd like the link to point to my application such that I could determine whether the user is authorized to access this zip file.

所以我希望我的HTML是这样的：

so I'd like my HTML to be this:

 <a href="/canDownload">download zip</a> 

我的PHP为 / canDownload 页面：

//business logic to determine if user can download

if($yesCanDownload){

$archive='https://mysite.com/uploads/my-archive.zip';
header("Content-Type: application/zip");
header("Content-Disposition: attachment; filename=".basename($archive));
header("Content-Length: ".filesize($archive));
ob_clean();
flush();
echo readfile("$archive");
}   

所以，我认为这个问题与 header（）代码，但我尝试了一些基于各种谷歌和其他SO建议相关的东西，但没有工作。

So, I think the problem has to do with the header() code but i've tried a bunch of things related to that based on various google and other SO suggestions and none work.

如果你回答我的问题，你可能也可以回答这个问题：带有PHP的压缩文件在提取后生成cpgz文件

If you answer my question, it is likely you can answer this question too: Zipped file with PHP results in cpgz file after extraction

推荐答案

好的，我自己回答了问题。

Ok, I answered my own question.

我最初没有说清楚的主要问题是该文件不在我的应用服务器上。它位于亚马逊AWS s3存储桶中。这就是为什么我在我的问题中使用了一个完整的URL， http：// mysite ... 而不仅仅是服务器上的文件路径。事实证明 fopen（）可以打开网址（所有s3存储桶对象，也就是文件，都有网址）这就是我所做的。

The main problem, which I originally didn't make clear, was that the file was not located on my application server. It was in a Amazon AWS s3 bucket. That is why I had used a full url in my question, http://mysite... and not just a file path on the server. As it turns out fopen() can open urls (all s3 bucket "objects", a.k.a. files, have urls) so that is what I did.

这是我的最终代码：

$zip= "http://mysite.com/uploads/my-archive.zip"; // my Amazon AWS s3 url
header("Content-Type: archive/zip"); // works with "application/zip" too
header("Content-Disposition: attachment; filename='my-archive.zip"); // what you want to call the downloaded zip file, can be different from what is in the s3 bucket   
$zip = fopen($zip,"r"); // open the zip file
echo fpassthru($zip); // deliver the zip file
exit(); //non-essential

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