如何使用Amazon S3创建一次性下载链接？
I want to create a one time download link to an amazon s3 hosted file. This link expires once the file has been downloaded.
我想创建一个亚马逊s3托管文件的一次性下载链接。文件下载后，此链接将过期。
I want this file to still be hosted but a visitor can only download the file once.
我希望仍然可以托管此文件，但访问者只能下载一次该文件。
The scenario I need this for is: I have a file download website where users pay for a file. I want the user to only be able to download the file once from the website (and Amazon s3), I also do not want the user to be able to share a direct download link with other people.
我需要这个场景是：我有一个文件下载网站，用户在那里支付文件费用。我希望用户只能从网站（和亚马逊s3）下载文件一次，我也不希望用户能够与其他人共享直接下载链接。
If this isn't possible I wonder if it is more efficient to limit it by an IP address or Cookie if possible?
如果这是不可能的，我想知道如果可能的话，用IP地址或Cookie来限制它是否更有效？
3 个解决方案
#1
13
There is no way to tell S3 to allow a link to be used only once. But you can create a link that can only be used until a specified time. What I do is redirect the requester to an S3 link that expires in a few minutes, so he or she doesn't have time to share it. You can make that expiration time very short, even a few seconds, so long as their browser has time to receive the redirect response and follow it.
无法告诉S3允许链接仅使用一次。但是您可以创建一个只能在指定时间之前使用的链接。我所做的是将请求者重定向到几分钟内到期的S3链接，因此他或她没有时间分享它。只要浏览器有时间接收重定向响应并遵循它，您就可以将到期时间设置得非常短，甚至几秒钟。
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