Every time you use webdav to sync photos, an error will be reported，

[hieastz]

Caddy server is windows 10. The phone uses photosync+webdav to synchronize photos, and an error will be reported every time a photo is synchronized.

Error message： Cannot create a file when that file already exists

Tip: The error log will be output, but it does not affect the use

Caddyfile：

{
	order webdav before file_server
}

:7001 {
	webdav {
		root D:/_data
		prefix /
	}
}

error.log：

{"level":"error","ts":1627832105.3054144,"logger":"http.handlers.webdav","msg":"internal handler error","error":"mkdir D:\\_data\\手机相册\\Screenshots\\2020: Cannot create a file when that file already exists.

[noerw]

I have a very similar issue (that feels like a race in the caching layer of the file tree?)

I run caddy on Linux 5.4.0-80-generic #90-Ubuntu, and didn't use an app to access the share, but the windows explorer webdav client.

This only occured for a single filename (a file that previously existed in the share, but was deleted), when trying to copy a file with that specific name to the dir, or when renaming another file to that name. Interestingly, this occured for all files with that name in various subdirs:

/webdav/foo/tickets.yaml
/webdav/bar/tickets.yaml

Windows client reports something along the line of:

• when copying: Error 0x80070021: Can't access file, because another process has locked a part of the file.
• when renaming: The source file or the storage device can't be read

The error disappeared only after restarting caddy.

[mholt]

I've updated the dependencies for the first time in a few years; might be worth checking again!