Mercurial > prosody-modules
view mod_muc_mam_markers/mod_muc_mam_markers.lua @ 4651:8231774f5bfd
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 | a1fc677d0cc8 |
children |
line wrap: on
line source
-- mod_muc_mam_markers -- -- Copyright (C) 2019 Marcos de Vera Piquero <marcos.devera@quobis.com> -- -- This file is MIT/X11 licensed. -- -- A module to make chat markers get stored in the MUC archives -- module:depends"muc_mam" local function handle_muc_message (event) local stanza = event.stanza; local is_received = stanza:get_child("received", "urn:xmpp:chat-markers:0"); local is_displayed = stanza:get_child("displayed", "urn:xmpp:chat-markers:0"); local is_acked = stanza:get_child("acknowledged", "urn:xmpp:chat-markers:0"); if (is_received or is_displayed or is_acked) then return true; end return nil; end module:hook("muc-message-is-historic", handle_muc_message); module:log("debug", "Module loaded");