No DAV header in HTTP OPTIONS response

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Nextcloud version (eg, 20.0.5): 28.0.4
deploy via helm chart in helm/charts/nextcloud/README.md at main · nextcloud/helm · GitHub

The issue you are facing:

I’m trying use Webdav in zotero, i use the url
https://MYHOST/remote.php/dav/files/USERNAME
in zotero’s webdav configuration, but i got an error:
https://MYHOST/remote.php/dav/files/USERNAME is not a valid webdav url.

Then i inspect source code of zotero, and find the reason is that there is no DAV field in the response header in https://MYHOST/remote.php/dav/files/USERNAME.
For example, use curl:

> curl -v -X OPTIONS https://username:pass@MYHOST/remote.php/dav/files/USERNAME
....
< HTTP/2 204 
< date: Fri, 12 Apr 2024 05:37:07 GMT
< strict-transport-security: max-age=15724800; includeSubDomains
< access-control-allow-origin: *
< access-control-allow-credentials: true
< access-control-allow-methods: GET, PUT, POST, DELETE, PATCH, OPTIONS
< access-control-allow-headers: X-Forwarded-For
< access-control-max-age: 1728000

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. Install nextcloud via helm chart
  2. config webdav in zotero

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'htaccess.RewriteBase' => '/',
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'apps_paths' => 
  array (
    0 => 
    array (
      'path' => '/var/www/html/apps',
      'url' => '/apps',
      'writable' => false,
    ),
    1 => 
    array (
      'path' => '/var/www/html/custom_apps',
      'url' => '/custom_apps',
      'writable' => true,
    ),
  ),
  'mail_smtpmode' => 'smtp',
  'mail_smtphost' => '',
  'mail_smtpport' => '465',
  'mail_smtpsecure' => 'ssl',
  'mail_smtpauth' => true,
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpname' => '',
  'mail_from_address' => 'notify',
  'mail_domain' => '',
  'mail_smtppassword' => '',
  'upgrade.disable-web' => true,
  'passwordsalt' => '',
  'secret' => '',
  'trusted_domains' => 
  array (
  ),
  'datadirectory' => '/var/www/html/data',
  'dbtype' => 'pgsql',
  'version' => '28.0.4.1',
  'overwrite.cli.url' => 'http://localhost',
  'dbname' => '',
  'dbhost' => 'nextcloud-postgresql',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => '',
  'dbpassword' => '',
  'installed' => true,
  'instanceid' => '',
);