Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
所以我设置了一个模块，允许我将文件上传到 amazon-s3。问题是我无法检查上传覆盖。理想情况下，我想先进入 amazon-s3 并检查我要上传的文件是否存在，如果存在则停止上传。反正我能做到吗？