WebDav: create directory with an already existing directory name -> Fatal error

[mmattel]

Steps to reproduce

1. Mount the instance with WebDav (in my case Ubuntu, Filemanager: PCManFM)
2. Create a directory on local / external mount, (external with SMB) via WebDav
3. Try to create another directory with the same name (conflict) via WebDav

Expected behaviour

Message from the filemanager: "Target file already exists"
No further error messages in the owncloud log

Actual behaviour

Two Fatal error messages are logged

Server configuration

Operating system: Ubuntu 14.04
Web server: nginx 1.9.4
Database: mysql 5.5.44
PHP version: 5.5.9

ownCloud version: 8.2 pre Alpha git
Updated from an older ownCloud or fresh install: fresh

List of activated apps:

  - files: 1.1.9
  - files_external: 0.2.3
  - files_sharing: 0.6.2
  - files_trashbin: 0.6.3
  - files_versions: 1.0.6
  - provisioning_api: 0.2

The content of config/config.php:

       "logtimezone": "Europe\/Vienna",
       "installed": true,
       "memcache.local": "\\OC\\Memcache\\APCu",
       "theme": "",
       "maintenance": false,
       "loglevel": 2,

Are you using external storage, if yes which one: local/smb/
Are you using encryption: no
Are you using an external user-backend, if yes which one: no

Client configuration

Browser: FireFox
Operating system: Ubuntu (same machine)

Logs

ownCloud log (data/owncloud.log)

There are always two error messages coming as pair

Fatal   remote      2015-09-16T13:07:42+02:00

Fatal   webdav  Exception: {"Message":"HTTP\/1.1 405 The resource you tried to create already exists","Code":0,"Trace":"
#0 \/xxx\/3rdparty\/sabre\/dav\/lib\/DAV\/CorePlugin.php(583): Sabre\\DAV\\Server->createCollection('fgh', Array, Array)\
n#1 [internal function]: Sabre\\DAV\\CorePlugin->httpMkcol(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\
n#2 \/xxx\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\
n#3 \/xxx\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(469): Sabre\\Event\\EventEmitter->emit('method:MKCOL', Array)\
n#4 \/xxx\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php(254): Sabre\\DAV\\Server->invokeMethod(Object(Sabre\\HTTP\\Request), Object(Sabre\\HTTP\\Response))\
n#5 \/xxx\/apps\/files\/appinfo\/remote.php(83): Sabre\\DAV\\Server->exec()\
n#6 \/xxx\/remote.php(132): require_once('\/xxx\/...')\
n#7 {main}","File":"\/xxx\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","Line":1154}     2015-09-16T13:07:42+02:00

Additional Info

• I did this test on my dev machine where I am currently working on core PR exclude directories from beeing processed #16534 (exclude directories from beeing processed).
• But I am also running a production evironment whith the actual officially release (ownCloud 8.1.1 (stable)). When I access via devmachine/WebDav my prodmachine/owncloud instance, I get the same error, means that this is also present in stable and not related to my dev instance.
• Usually you do not get this error when you do this test with a Windows WebDav client, because it seems that Windows WebDav clients (Windows native, CyberDuck ect) check the directory name to be created against a cached list first so the request does not get passed to the WebDav server and therefore not triggering the error.

[mmattel]

I just have downloaded another Windows WebDav client named CarotDav.
This client does not check if the folder to be created already exists against a local cache entry but sends the request directly to the server. The Fatal Error message also comes up with Windows. This means, that it is proven not to be a issue of Windows/Linux clients.

[PVince81]

Works for me on 8.2RC1, getting "405 The resource you tried to create already exists"

If I remember correctly, this was fixed already.