Webdav sync does not work if size is the same but modtime is different

Suspected Bug
1

What is the problem you are having with rclone?

When syncing two webdavs, files with the same size but different modtime does not get sync/

What is your rclone version (output from rclone version)

v1.55.1

Which OS you are using and how many bits (eg Windows 7, 64 bit)

Linux 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux

Which cloud storage system are you using? (eg Google Drive)

Webdavs, based on golang webdav .

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone sync --dry-run -vv files:Isaac backups:remote-backups/data/Isaac

The rclone config contents with secrets removed.

[files]
type = webdav
url = https://files.***.fr
vendor = other
user = ***
pass = ***

[backups]
type = webdav
url = https://backups.***.fr
vendor = other
user = ***
pass = ***

A log from the command with the -vv flag

rclone lsl files:Isaac

gives

 16777216 2021-05-17 15:38:09.000000000 Pokemon - Version Emeraude (France).gba
   572016 2021-06-02 17:11:10.000000000 Pokemon - Version Emeraude (France).sav

and

rclone lsl backups:remote-backups/data/Isaac

gives

 16777216 2021-05-18 03:05:43.000000000 Pokemon - Version Emeraude (France).gba
   572016 2021-05-18 03:05:42.000000000 Pokemon - Version Emeraude (France).sav

but

rclone sync --dry-run -vv files:Isaac backups:remote-backups/data/Isaac

gives

2021/06/03 12:06:47 DEBUG : Using config file from "/root/.config/rclone/rclone.conf"
2021/06/03 12:06:47 DEBUG : rclone: Version "v1.55.1" starting with parameters ["rclone" "sync" "--dry-run" "-vv" "files:Isaac" "backups:remote-backups/data/Isaac"]
2021/06/03 12:06:47 DEBUG : Creating backend with remote "files:Isaac"
2021/06/03 12:06:47 DEBUG : Creating backend with remote "backups:remote-backups/data/Isaac"
2021/06/03 12:06:47 DEBUG : Pokemon - Version Emeraude (France).gba: Sizes identical
2021/06/03 12:06:47 DEBUG : Pokemon - Version Emeraude (France).gba: Unchanged skipping
2021/06/03 12:06:47 DEBUG : Pokemon - Version Emeraude (France).sav: Sizes identical
2021/06/03 12:06:47 DEBUG : Pokemon - Version Emeraude (France).sav: Unchanged skipping
2021/06/03 12:06:47 DEBUG : webdav root 'remote-backups/data/Isaac': Waiting for checks to finish
2021/06/03 12:06:47 DEBUG : webdav root 'remote-backups/data/Isaac': Waiting for transfers to finish
2021/06/03 12:06:47 DEBUG : Waiting for deletions to finish
2021/06/03 12:06:47 INFO  : There was nothing to transfer
2021/06/03 12:06:47 NOTICE: 
Transferred:             0 / 0 Bytes, -, 0 Bytes/s, ETA -
Checks:                2 / 2, 100%
Elapsed time:         0.4s
2

Besides, this post could be related :

https://forum.rclone.org/t/ftp-sync-error-when-file-size-unchanged/18172
3

From the documentation rclone.org/webdav:

Plain WebDAV does not support modified times. However when used with Owncloud or Nextcloud rclone will support modified times.

This stems from the webdav standard itself, not rclone.

4

Ok, that explains the issue. Thanks for your insight.

5

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