writing files to webdav share / mountpoint of public links creates empty files (locking enabled)

[raidroGS]

writing files to webdav share / mountpoint of public links leads to empty files if locking is enabled for client

If locking is disabled in Windows registry (HKLM\SYSTEM\CurrentControlSet\Services\WebClient\Parameters) resp. davfs2 config on linux, writing works as expected!

⚙️ How-to Reproduce

Steps to reproduce the behavior:

1. Create a public, password not enabled
2. Mount a subdirectory under the public link, f.e. landscape, with davfs2 on linux or create a network share on win10/11
3. Open a file and write content into this file, save it
4. Open file again (after file is synced to server), file is empty

relevant log information from cells

2024-03-22T07:54:35.855+0100	DEBUG	pydio.web.statics	AccessListFromUser - AccessList already in cache
2024-03-22T07:54:35.855+0100	DEBUG	pydio.web.statics	After Auth	{"time": "2.011975ms"}
2024-03-22T07:54:35.855+0100	DEBUG	pydio.web.statics	WS Roots In Cache	{"time": "3.47µs"}
2024-03-22T07:54:35.855+0100	DEBUG	pydio.web.statics	processing dav request on public link	{"inputPath": "landscape/a/test.txt", "davPrefix": "/public/8b22d9c16ce8/dav", "routerPrefix": "test", "davPath": "landscape/a/test.txt"}
2024-03-22T07:54:35.855+0100	DEBUG	pydio.gateway.dav	-- DAV ENTER	{"Method": "PUT", "path": "/public/8b22d9c16ce8/dav/landscape/a/test.txt"}
2024-03-22T07:54:35.855+0100	ERROR	pydio.web.statics	|- DAV END	{"method": "PUT", "path": "/public/8b22d9c16ce8/dav/landscape/a/test.txt", "error": "webdav: locked"}
github.com/pydio/cells/v4/common/log.(*logger).Error
	github.com/pydio/cells/v4/common/log/logger.go:127
github.com/pydio/cells/v4/gateway/dav.newHandler.func1
	github.com/pydio/cells/v4/gateway/dav/handler.go:112
golang.org/x/net/webdav.(*Handler).ServeHTTP
	golang.org/x/net@v0.20.0/webdav/webdav.go:81
github.com/pydio/cells/v4/gateway/dav.newHandler.logRequest.func2
	github.com/pydio/cells/v4/gateway/dav/handler.go:57
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2136
github.com/pydio/cells/v4/gateway/dav.newHandler.HttpWrapperMeta.func4
	github.com/pydio/cells/v4/common/service/context/http-to-meta.go:126
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2136
github.com/pydio/cells/v4/frontend/front-srv/web/index.(*PublicHandler).ServeDAV
	github.com/pydio/cells/v4/frontend/front-srv/web/index/public.go:295
github.com/pydio/cells/v4/frontend/front-srv/web/index.(*PublicHandler).ServeHTTP
	github.com/pydio/cells/v4/frontend/front-srv/web/index/public.go:193
github.com/pydio/cells/v4/frontend/front-srv/web.init.0.func1.2.HttpWrapperMeta.func5
	github.com/pydio/cells/v4/common/service/context/http-to-meta.go:126
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2136
net/http.(*timeoutHandler).ServeHTTP.func1
	net/http/server.go:3397
2024-03-22T07:54:35.855+0100	DEBUG	pydio.grpc.docstore	GetDocument	{"store": "share", "docId": "8b22d9c16ce8"}
2024-03-22T07:54:35.856+0100	DEBUG	pydio.web.statics	Authenticate DAV on public link: 8b22d9c16ce8, Path: landscape/a/test.txt
2024-03-22T07:54:35.856+0100	DEBUG	pydio.web.statics	AccessListFromUser - AccessList already in cache
2024-03-22T07:54:35.856+0100	DEBUG	pydio.web.statics	After Auth	{"time": "77.018µs"}
2024-03-22T07:54:35.856+0100	DEBUG	pydio.web.statics	WS Roots In Cache	{"time": "2.633µs"}
2024-03-22T07:54:35.856+0100	DEBUG	pydio.web.statics	processing dav request on public link	{"inputPath": "landscape/a/test.txt", "davPrefix": "/public/8b22d9c16ce8/dav", "routerPrefix": "test", "davPath": "landscape/a/test.txt"}
2024-03-22T07:54:35.856+0100	DEBUG	pydio.gateway.dav	-- DAV ENTER	{"Method": "UNLOCK", "path": "/public/8b22d9c16ce8/dav/landscape/a/test.txt"}
2024-03-22T07:54:35.856+0100	ERROR	pydio.web.statics	|- DAV END	{"method": "UNLOCK", "path": "/public/8b22d9c16ce8/dav/landscape/a/test.txt", "error": "webdav: no such lock"}
github.com/pydio/cells/v4/common/log.(*logger).Error
	github.com/pydio/cells/v4/common/log/logger.go:127
github.com/pydio/cells/v4/gateway/dav.newHandler.func1
	github.com/pydio/cells/v4/gateway/dav/handler.go:112
golang.org/x/net/webdav.(*Handler).ServeHTTP
	golang.org/x/net@v0.20.0/webdav/webdav.go:81
github.com/pydio/cells/v4/gateway/dav.newHandler.logRequest.func2
	github.com/pydio/cells/v4/gateway/dav/handler.go:57
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2136
github.com/pydio/cells/v4/gateway/dav.newHandler.HttpWrapperMeta.func4
	github.com/pydio/cells/v4/common/service/context/http-to-meta.go:126
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2136
github.com/pydio/cells/v4/frontend/front-srv/web/index.(*PublicHandler).ServeDAV
	github.com/pydio/cells/v4/frontend/front-srv/web/index/public.go:295
github.com/pydio/cells/v4/frontend/front-srv/web/index.(*PublicHandler).ServeHTTP
	github.com/pydio/cells/v4/frontend/front-srv/web/index/public.go:193
github.com/pydio/cells/v4/frontend/front-srv/web.init.0.func1.2.HttpWrapperMeta.func5
	github.com/pydio/cells/v4/common/service/context/http-to-meta.go:126
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2136
net/http.(*timeoutHandler).ServeHTTP.func1
	net/http/server.go:3397

🩺 Environment / Setup

Server Versions:

• Cells Version 4.3.x, 4.4dev
• MariaDB 10.5
• Server OS: Debian 11/12

Client used for testing:

• Win10 / 11 network share (webdav)
• Linux (davfs2 mounted filesystem)