view mod_fallback_vcard/mod_fallback_vcard.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 ceb594a14a18
children
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local datamanager = require "util.datamanager";
local usermanager = require "core.usermanager";
local st = require "util.stanza";
local host = module.host;
local jid_split = require "util.jid".split;

local orgname = module:get_option_string("default_vcard_orgname");
local orgmail = module:get_option_boolean("default_vcard_orgmail");

module:hook("iq/bare/vcard-temp:vCard", function(event)
	local session, stanza = event.origin, event.stanza;
	local to = stanza.attr.to;
	local username = jid_split(to);
	if not username then return end

	local vcard = datamanager.load(username, host, "vcard");
	local data = datamanager.load(username, host, "account_details");
	local exists = usermanager.user_exists(username, host);
	module:log("debug", "has %s: %s", "vcard", tostring(vcard));
	module:log("debug", "has %s: %s", "data", tostring(data));
	module:log("debug", "has %s: %s", "exists", tostring(exists));
	data = data or {};

	if not(vcard) and data and exists then
		-- MAYBE
		-- first .. " " .. last
		-- first, last = name:match("^(%w+) (%w+)$")
		local vcard = st.reply(stanza):tag("vCard", { xmlns = "vcard-temp" })
			:tag("VERSION"):text("3.0"):up()
			:tag("N")
				:tag("FAMILY"):text(data.last or ""):up()
				:tag("GIVEN"):text(data.first or ""):up()
			:up()
			:tag("FN"):text(data.name or ""):up()
			:tag("NICKNAME"):text(data.nick or username):up()
			:tag("JABBERID"):text(username.."@"..host):up();
		if orgmail then
			vcard:tag("EMAIL"):tag("USERID"):text(username.."@"..host):up():up();
		elseif data.email then
			vcard:tag("EMAIL"):tag("USERID"):text(data.email):up():up();
		end
		if orgname then
			vcard:tag("ORG"):tag("ORGNAME"):text(orgname):up():up();
		end
		session.send(vcard);
		return true;
	end
end, 1);