Mercurial > prosody-modules
view mod_support_room/mod_support_room.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 | f72aa8840042 |
children |
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local mm = require "core.modulemanager"; local st = require "util.stanza"; local jid_host, jid_prep = import("util.jid", "host", "prep"); local invite_to_room = assert(jid_prep(module:get_option_string(module.name)), "The option " .. module.name .. " must be set"); local inviter = module:get_option_string(module.name .. "_inviter", module.host); local invite_reason = module:get_option_string(module.name .. "_reason"); module:hook("user-registered", function (event) local user_jid = event.username .. "@" .. event.host; local muc = mm.get_module(jid_host(invite_to_room), "muc"); if not muc then module:log("error", "There is no MUC service '%s'", jid_host(invite_to_room)); return; end local room = muc.get_room_from_jid(invite_to_room); if room then room:set_affiliation(true, user_jid, "member", invite_reason, { reserved_nickname = event.username }); -- Invite them to the room too module:send(st.message({ from = inviter, to = user_jid }) :tag("x", { xmlns = "jabber:x:conference", jid = invite_to_room, reason = invite_reason }):up()); else module:log("error", "The room %s does not exist, can't invite newly registered user", invite_to_room); end end);