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.

---
summary: Answers disco#info queries on the behalf of the recipient
rockspec:
  dependencies:
    - mod_cache_c2s_caps
---

Description
===========

This module intercepts disco#info queries and checks if we already know the
capabilities of this session, in which case we don’t transmit the iq and answer
it ourselves.