Dav files namespace should use the user in request for deciding the layout

[ishank011]

reva/internal/http/services/owncloud/ocdav/dav.go

Lines 59 to 66 in 5831dc0

	h.FilesHandler = new(WebDavHandler)
	if err := h.FilesHandler.init(c.FilesNamespace); err != nil {
	return err
	}
	h.FilesHomeHandler = new(WebDavHandler)
	if err := h.FilesHomeHandler.init(c.WebdavNamespace); err != nil {
	return err
	}

For the incoming /dav/files/userID requests, we have different namespaces depending on whether the request is for the logged-in user's namespace or not. Since in the storage drivers, we specify the layout depending only on the logged in user, this works in the first condition. However, when a user wants to access another user's namespace when the storage provider depends on the logged in user's namespace, it fails.

For example, consider the following case. The owncloud fs uses a layout
{{substr 0 1 .Id.OpaqueId}}/{{.Id.OpaqueId}} The user einstein sends a request /dav/files/marie, which should be allowed. However, based on the current way we apply the layout, there's no way in which this can be translated to /m/marie/

reva/internal/http/services/owncloud/ocdav/ocdav.go

Lines 195 to 197 in 5831dc0

	func applyLayout(ctx context.Context, ns string) string {
	return templates.WithUser(ctxuser.ContextMustGetUser(ctx), ns)
	}

It can only use the details of the user in context. This needs to be changed to handle such requests. @butonic @PVince81