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Drivers without overwrite semantics (Aliyun Drive via WebDAV, issue #100) silently create `xxx_(1).ext` copies instead of replacing the file. Add a global setting `upload_force_overwrite` (default off). When enabled, every upload first checks whether the target exists and deletes it, then writes: - /fs/put and /fs/form delete after the body has passed the size limit, so a rejected upload never destroys the existing file. - /fs/multipart/init only cleans up when a new session is created; resumed sessions are left alone. - WebDAV PUT and S3 PutObject follow the same order. - /fs/get_direct_upload_info deletes before signing the direct upload URL, but an explicit `Overwrite: false` header still wins. Directories are never deleted (uploading a file over a folder now fails with a readable error). Delete errors that mean "already gone" are ignored; other delete failures abort the upload instead of silently producing a copy. The setting's help text states that it costs one existence check and, when the file exists, one extra delete request per upload.
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tence check and, when the file exists, one extra delete request per upload.
Summary / 摘要
Drivers without overwrite semantics (Aliyun Drive via WebDAV, issue #100) silently create
xxx_(1).extcopies instead of replacing the file.Add a global setting
upload_force_overwrite(default off). When enabled, every upload first checks whether the target exists and deletes it, then writes:Overwrite: falseheader still wins.Directories are never deleted (uploading a file over a folder now fails with a readable error). Delete errors that mean "already gone" are ignored; other delete failures abort the upload instead of silently producing a copy.
The setting's help text states that it costs one exis
/ 此 PR 包含破坏性变更。
/ 此 PR 修改了公开 API、配置、存储格式或迁移行为。
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