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plugins/mod_offline.lua @ 12201:e5e0ab93d7f4 0.11
util.xml: Break reference to help the GC (fix #1711)
LuaExpat uses a registry reference to track handlers, which makes
it so that an upvalue like this creates a reference loop that keeps the
parser and its handlers from being garbage collected. The same issue has
affected util.xmppstream in the past.
Code for checking:
local xml_parse = require"util.xml".parse;
for i = 1, 10000 do xml_parse("<root/>") end
collectgarbage(); collectgarbage();
print(collectgarbage("count"), "KiB");
A future release of LuaExpat may fix the underlying issue there.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Thu, 20 Jan 2022 09:57:20 +0100 |
parent | 8030:bd3527198308 |
child | 10242:7e5d2a6c9390 |
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-- Prosody IM -- Copyright (C) 2008-2009 Matthew Wild -- Copyright (C) 2008-2009 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local datetime = require "util.datetime"; local jid_split = require "util.jid".split; local offline_messages = module:open_store("offline", "archive"); module:add_feature("msgoffline"); module:hook("message/offline/handle", function(event) local origin, stanza = event.origin, event.stanza; local to = stanza.attr.to; local node; if to then node = jid_split(to) else node = origin.username; end return offline_messages:append(node, nil, stanza, os.time(), ""); end, -1); module:hook("message/offline/broadcast", function(event) local origin = event.origin; local node, host = origin.username, origin.host; local data = offline_messages:find(node); if not data then return true; end for _, stanza, when in data do stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = host, stamp = datetime.datetime(when)}):up(); -- XEP-0203 origin.send(stanza); end offline_messages:delete(node); return true; end, -1);