WebDAV Upload from macOS doesn't work

[dh1tw]

Describe the bug

Hi, I mounted my personal space in MacOS Finder as a WebDAV share. I can see all files in my personal space. Uploading files via WebDAV creates the files with a size of 0 bytes. After a moment, with Error -36. Uploading the files through the web browser works flawlessly.

Steps to reproduce

1. Mount Personal Space as WebDAV on macOS
2. Drag & Drop a file into the mounted space
3. Wait until error appears (~1min)

Expected behavior

Files should be uploaded correctly via WebDAV.

Actual behavior

MacOS Finder errors with the following error (sorry my system is in German):

Der Finder konnte diesen Vorgang nicht abschließen, da einige Daten in „mypicture.png“ nicht gelesen oder geschrieben werden konnten.
(Fehler: -36)

Setup

Docker Compose
Container Image: OpenCloud-rolling:3.4.0

Additional context

MacOS 15.6.1

[micbar]

I could reproduce the problem.

Seems like a MacOS issue. Mac doesn't seem to send the content length.

@butonic @aduffeck I think there is not much we can do.

{"level":"error","service":"ocdav","name":"eu.opencloud.web.ocdav","traceid":"84f57a52715cc1960fe573694311a31c","request-id":"5f7dbc3c2951/ANM47M0yxW-088240","spaceid":"be19e592-c239-4a0e-b41d-ec1009b2f702$fe26774e-e62b-103f-91be-0575585b6b72","path":"/pexels-dreamypixel-547119 Kopie.jpg","error":"strconv.ParseInt: parsing \"\": invalid syntax","time":"2025-09-22T07:05:04Z","line":"github.com/opencloud-eu/reva/v2@v2.34.1-0.20250704134423-74abc5f04717/internal/http/services/owncloud/ocdav/put.go:147","message":"error getting the content length"}
{"level":"info","service":"proxy","proto":"HTTP/1.1","request-id":"5f7dbc3c2951/ANM47M0yxW-088239","traceid":"84f57a52715cc1960fe573694311a31c","remote-addr":"89.246.102.70","method":"PUT","status":400,"path":"/remote.php/dav/spaces/be19e592-c239-4a0e-b41d-ec1009b2f702$fe26774e-e62b-103f-91be-0575585b6b72/pexels-dreamypixel-547119 Kopie.jpg","duration":285.658045,"bytes":0,"time":"2025-09-22T07:05:04Z","line":"github.com/opencloud-eu/opencloud/services/proxy/pkg/middleware/accesslog.go:34","message":"access-log"}

[micbar]

@dh1tw I admit that is frustrating. I did a quick research, mac does't fulfil the RFC standard here. The RFC states that the content length header is mandatory on WebDAV PUT requests.

[rhafer]

@micbar Can you check the Transfer-Encoding Header that the MacOS machine it settting in the PUT request? Does it contain chunked by chance? In that case the Content-Length can be absent. (However, it seems reva doesn't currently support the chunked transfer-encoding)

[micbar]

@rhafer There has already been some code in reva. Very interesting. 🤣

I like the speaking function names:

    if sufferMacOSFinder(r) {
		err := handleMacOSFinder(w, r)
		if err != nil {
			log.Debug().Err(err).Msg("error handling Mac OS corner-case")
			w.WriteHeader(http.StatusInternalServerError)
			return false
		}
	}
	return true