push-notification plugin and imap-metadata permissions

[Teemu Huovila]

On 22.04.2016 15:17, Giovanni S. Fois wrote:
> Ultra short version:
> 
> Why cant I set the following mailbox metadata key?
> /private/vendor/vendor.dovecot/pvt/server/vendor/vendor.dovecot/http-notify
Why do you want to set it there? Have you tried setting it on some mailbox path?

> 
> Let me explain the context:
> 
> I'm using the Dovecot version 2.23.1, but the same happens for the 2.2.22
> 
> The push-notification plugin is supposed to send out a notification whenever
> a mailbox get a new email message.
> 
> In order to tell if a mailbox is enabled to send out the notification, the plugin
> looks out for the following mailbox metadata key:
> /private/vendor/vendor.dovecot/pvt/server/vendor/vendor.dovecot/http-notify
> 
> If the key is set then everything is OK and the notification is sent, otherwise the
> action is skipped.
> 
> If I try to setup the metadata key by hand (telnet as the user over the imap port):
> setmetadata INBOX (/private/vendor/vendor.dovecot/pvt/server/vendor/vendor.dovecot/http-notify "user=myuser at mydomain.com")
> 
> I get the error message: "Internal mailbox attributes cannot be accessed"
> 
> Digging in the Dovecot 2.2.22 sources i found that:
> 
> This string is from lib-imap-storage/imap-metadata.c - line 36 - Dovecot 2.2.22
> The message is triggered by the following condition - same file - line 125  - Dovecot 2.2.22
> 
> if (strncmp(*key_r, MAILBOX_ATTRIBUTE_PREFIX_DOVECOT_PVT,
>                     strlen(MAILBOX_ATTRIBUTE_PREFIX_DOVECOT_PVT)) == 0) {
> 
> So the path pvt/server appears to be forbidden.
> 
> But, in the file lib-storage/mailbox-attribute.h we can read the following comment:
> 
> /* User can get/set all non-pvt/ attributes and also pvt/server/
>    (but not pvt/server/pvt/) attributes. */
> 
> And, after said comment there is the definition of the macro MAILBOX_ATTRIBUTE_KEY_IS_USER_ACCESSIBLE(key)
> which has the same basic function of the condition in imap-metadata.c , but in this case
> the same imap key is seen as accessible.
> 
> Now my questions:
> 
> Can we use a negated version of MAILBOX_ATTRIBUTE_KEY_IS_USER_ACCESSIBLE(key) in imap-metadata?
> How can the push-notification plugin work out-of-the-box without changes and recompilation?
> 
> Thank you for your valuable time and forgive me if I'm posing a dumb question.
Please see instructions at http://oxpedia.org/wiki/index.php?title=AppSuite:OX_Mail#Setup_of_the_Dovecot_Push
In case the problem is not resolved, do attach your doveconf -n output to the next mail.

br,
Teemu

> 
> Best wishes,
> Giovanni S. Fois