mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8 The `body:sub()` call risks splitting the string in the middle of a multi-byte UTF-8 sequence. This should have been caught by util.stanza validation, but that would have caused some havoc, at the very least causing the notification to not be sent. There have been no reports of this happening. Likely because this module isn't widely deployed among users with languages that use many longer UTF-8 sequences. The util.encodings.utf8.valid() function is O(n) where only the last sequence really needs to be checked, but it's in C and expected to be fast.

---
labels: 'Stage-Alpha'
summary: Limit which file transfer users can use
...

Introduction
------------

This module attempts to restrict use of non-whitelisted XEP-0065
proxies.

Configuration
-------------

Without any options, the module will restrict users to local [proxy65
components](https://prosody.im/doc/modules/mod_proxy65).

    -- additional proxies to allow
    allowed_streamhosts = { "proxy.eu.jabber.org" }

The module will add all local proxies to that list. To prevent it from
doing that, set

    allow_local_streamhosts = false