view mod_spam_reporting/mod_spam_reporting.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 fe24bda72838
children 4eb684ab440c
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-- XEP-0377: Spam Reporting for Prosody
-- Copyright (C) -2016 Kim Alvefur
--
-- This file is MIT/X11 licensed.

local jid_prep = require "util.jid".prep;

module:depends("blocklist");

module:add_feature("urn:xmpp:reporting:0");
module:add_feature("urn:xmpp:reporting:reason:spam:0");
module:add_feature("urn:xmpp:reporting:reason:abuse:0");
module:add_feature("urn:xmpp:reporting:1");

module:hook("iq-set/self/urn:xmpp:blocking:block", function (event)
	for item in event.stanza.tags[1]:childtags("item") do
		local report = item:get_child("report", "urn:xmpp:reporting:0");
		local jid = jid_prep(item.attr.jid);
		if report and jid then
			local type = report:get_child("spam") and "spam" or
				report:get_child("abuse") and "abuse" or
				"unknown";
			local reason = report:get_child_text("text") or "no reason given";
			module:log("warn", "Received report of %s from JID '%s', %s", type, jid, reason);
			module:fire_event(module.name.."/"..type.."-report", {
				origin = event.origin, stanza = event.stanza, jid = jid,
				item = item, report = report, reason = reason, });
		else
			report = item:get_child("report", "urn:xmpp:reporting:1");
			if report and jid then
				local type
				if report.attr.reason == "urn:xmpp:reporting:abuse" then
					type = "abuse";
				end
				if report.attr.reason == "urn:xmpp:reporting:spam" then
					type = "spam";
				end
				local reason = report:get_child_text("text") or "no reason given";
				module:log("warn", "Received report of %s from JID '%s', %s", type, jid, reason);
				module:fire_event(module.name.."/"..type.."-report", {
					origin = event.origin, stanza = event.stanza, jid = jid,
					item = item, report = report, reason = reason, });
			end
		end
	end
end, 1);