在接入雨云对象存储时，文件只能下载，不能上传。

Environment information

• ZFile version: 4.4.0 Pro
• Storage source involved: S3 Universal Protocol
• Deployment method: Linux-Batna
• Operating system/device: Windows
• Browser/version number: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36 Edg/153.0.0.0

Reproducibility steps

In the background, use S3 storage to access Rain Cloud object storage, the key is completely configured according to the official website instructions, and the test can also be passed. However, when uploading to the ZFile front-end, an error 403 is reported, and the access log of this file can be seen in the Rain Cloud backend, and there is also traffic display when uploading, but for some reason, after the upload is completed, it returns 403, and the error is shown in the additional information. However, there is no problem with downloading the content of the object storage using ZFile, and there is no problem with uploading and downloading using SFTP locally, and there is no problem with uploading and downloading using Winscp using S3 access locally. I tried to switch to SFTP access to Rain Cloud using ZFile, but I could not upload, and an error 503 was reported. My ZFile version is the donation version 5.0.3, and I cannot select this version in the front.