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Example code of bennet0496/nextcloud_attachments

Informations about the package nextcloud_attachments

Nextcloud Attachments for Roundcube

Upload large attachments to Nextcloud and automatically create share link. Files that exceed $config['max_message_size']/1.33 will automatically be uploaded to the configured nextcloud server and linked in the email body. If the user has 2FA configured in Nextcloud, the plugin will ask to log in to create an app password.

This plugin is meant for environment where users have the same login for email and Nextcloud, e.g. company Installations

Screenshots

Config

The plugin itself has a handful core settings. The server, the username strategy and the sub folder.

However, it also depends on the general config

Files larger than that will/must be uploaded to Nextcloud, so you should set it to the desired value. With the following two additional options you can control the behavior of the plugin. Should it behave like Google Mail and automatically without any further user input, or should it behave like Outlook.com with a soft-limit suggesting the user to upload and forcing them when the hard limit $config['max_message_size'] is reached

Remember, you will need to modify post_max_size and upload_max_filesize in your php.ini to allow large uploads in general

__When enabling the plugin make sure to place it before any other attachment plugins like filesystem_attachments__ E.g.

Nextcloud Brute-Force protection

By default this plugin, tests whether it can use the mail credentials for the Nextcloud login. If lots of users can't login with their mail credentials to Nextcloud, e.g., due to high adoption of 2FA or a high percentage of user that are denied form using Nextcloud (via LDAP groups or smth), this will inevatably lead to Nextcloud locking out the Roundcube server because it considers these logins, as login brutforce attempts.

You can disable the behavior of trying the mail password since version 1.3

However you might also want to consider, adding you Roundcube server to the Brutforce allow-list of the Nextcloud server. To do that you have to enable the bruteforce settings app and then as an administrator, unter Setting and Security, add your Server's IP to the allow list.

Excluding users

You can also exclude users from being able to interact with the plugin, which can be useful if they either won't be able to use the cloud anyway, have a small quota or can't share link or what ever might be the reason, that they should be unable to share file links.

There are 4 strategies to exclude users. The first and most straight forward one is the direct exclude list

If either their, IMAP (login) username, email or mapped username matches an entry in the list, they won't be able to use the plugin (version <1.3 only matched the login usernames).

The other 3 strategies (only available in version >=1.3) involve using address books, which essentially allow retrieving the status from LDAP. Which is useful because that has probably the information who can log in where anyway. Option one is to exclude any user listed with their uid or email in a given address book, allowing you to create a (hidden) address book that filters the users that should not be able to use the plugin

You can create a hidden address book by setting its hidden value in the global config.

Option 2 is to exclude users with a specific mapped value in an address book. Allowing you that if you have a public address book anyway to map a value instead of creating a new address book. This is particularly using with directory server supporting the memberOf overlay to directly indicate group memberships in the user entry, however currently this may or may not work with multivalued attributes.

Add a mapped value with the fieldset as shown above.

And Option 3 is to exclude users that are in a specific group, when group mapping is set up for the address book.

You can set up group mapping in the global LDAP config.

Planned Features

Credits

All versions of nextcloud_attachments with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
ext-simplexml Version *
ext-json Version *
ext-intl Version *
ext-openssl Version *
roundcube/plugin-installer Version ^0.3
guzzlehttp/guzzle Version ^7.8
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