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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.
author Kim Alvefur <zash@zash.se>
date Sun, 22 Aug 2021 13:22:59 +0200
parents 4d73a1a6ba68
children 34fb3d239ac1
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---
labels:
- 'Stage-Stable'
summary: Broadcast a message to online users
...

Introduction
============

This module largely duplicates the functionality of the standard
mod\_announce that is included with Prosody. It was developed for
compatibility with some clients (e.g. iChat) that do not support ad-hoc
commands or sending to JIDs with the format
'example.com/announce/online'.

It may also be useful in other specific cases.

Configuration
=============

    Component "broadcast@example.com" "broadcast"

By default, only server admins are allowed to post to this address. You
can override this, by specifying the 'broadcast\_senders' option:

    Component "broadcast@example.com" "broadcast"
        broadcast_senders = { "user1@example.com", "user2@example.com" }

Compatibility
=============

  ------ -------
  0.9    Works
  0.10   Works
  ------ -------