Mercurial > prosody-modules
view mod_csi_grace_period/mod_csi_grace_period.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 | e1e337dc05b6 |
children |
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-- Copyright (c) 2019 Kim Alvefur -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- -- Yes, this module touches stores data in user sessions -- luacheck: ignore 122 local grace_period = module:get_option_number("grace_period", 30); local user_sessions = prosody.hosts[module.host].sessions; module:hook("csi-is-stanza-important", function (event) if event.stanza.name ~= "message" then return end local session = event.session; if not session then return; end local user_session = user_sessions[session.username]; if not user_session then return; end if user_session.grace_time_start then if user_session.last_active == session.resource then return; end if (os.time() - user_session.grace_time_start) < grace_period then session.log("debug", "Within grace period, probably seen"); event.reason = "grace period"; return false; end end end, 1); local function on_activity(event) local stanza, origin = event.stanza, event.origin; local user_session = user_sessions[origin.username]; if not user_session then return; end if stanza:get_child("body") or stanza:get_child("active", "http://jabber.org/protocol/chatstates") then user_session.last_active = origin.resource; user_session.grace_time_start = os.time(); end end module:hook("pre-message/full", on_activity); module:hook("pre-message/bare", on_activity); module:hook("pre-message/host", on_activity);