Is there any way that I can generate Pre-Signed URL's without any expiry date ? I'm developing a Email app where my attachments will be saved in S3. Also please let me know what is the best way to download attachments via JavaScript SDK. Is there any way that I can generate Pre-Signed
阅读背景：
AWS S3预先签名的URL没有到期日期
来源：互联网
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