--- a/mod_spam_report_forwarder/mod_spam_report_forwarder.lua Fri Feb 23 22:50:57 2024 +0000
+++ b/mod_spam_report_forwarder/mod_spam_report_forwarder.lua Sun Feb 25 15:28:45 2024 +0000
@@ -1,18 +1,133 @@
+local dt = require "util.datetime";
+local jid = require "util.jid";
local st = require "util.stanza";
+local url = require "socket.url";
+
+local new_id = require "util.id".short;
+local render = require"util.interpolation".new("%b{}", function (s) return s; end);
local destinations = module:get_option_set("spam_report_destinations", {});
+local archive = module:open("archive");
+
+local cache_size = module:get_option_number("spam_report_forwarder_contact_cache_size", 256);
+local report_to_origin = module:get_option_boolean("spam_report_forwarder_to_origin", true);
+local contact_lookup_timeout = module:get_option_number("spam_report_forwarder_contact_lookup_timeout", 180);
+
+local body_template = module:get_option_string("spam_report_forwarder_body_template", [[
+SPAM/ABUSE REPORT
+-----------------
+
+Reported JID: {reported_jid}
+
+A user on our service has reported a message originating from the above JID on
+your server.
+
+{reported_message_time&The reported message was sent at: {reported_message_time}}
+
+--
+This message contains also machine-readable payloads, including XEP-0377, in case
+you want to automate handling of these reports. You can receive these reports
+to a different address by setting 'spam-report-addresses' in your server
+contact info configuration. For more information, see https://xmppbl.org/reports/
+]]):gsub("^%s+", ""):gsub("(%S)\n(%S)", "%1 %2");
+
+local report_addresses = require "util.cache".new(cache_size);
+
+local function get_address(form, ...)
+ for i = 1, select("#", ...) do
+ local field_var = select(i, ...);
+ local field = form:get_child_with_attr("field", "jabber:x:data", "var", field_var);
+ if field then
+ return url.parse(field:get_child_text("value")).path;
+ end
+ end
+end
+
+local function get_origin_report_address(reported_jid)
+ local host = jid.host(reported_jid);
+ local address = report_addresses:get(host);
+ if address then return address; end
+
+ local contact_query = st.iq({ to = host, from = module.host, id = new_id() })
+ :query("http://jabber.org/protocol/disco#info");
+
+ return module:send_iq(contact_query, prosody.hosts[module.host], contact_lookup_timeout)
+ :next(function (response)
+ if response.attr.type ~= "result" then return; end
+
+ for form in response.tags[1]:childtags("x", "jabber:x:data") do
+ local form_type = form:get_child_with_attr("field", nil, "var", "FORM_TYPE");
+ if form_type == "http://jabber.org/network/serverinfo" then
+ address = get_address(form, "spam-report-addresses", "abuse-addresses");
+ break;
+ end
+ end
+ return address;
+ end);
+end
+
+local function send_report(to, message)
+ local m = st.clone(message);
+ m.attr.to = to;
+ module:send(m);
+end
+
function forward_report(event)
+ local reporter_username = event.origin.username;
+ local reporter_jid = jid.join(reporter_username, module.host);
+ local reported_jid = event.jid;
+
local report = st.clone(event.report);
- report:text_tag("jid", event.jid, { xmlns = "urn:xmpp:jid:0" });
+ report:text_tag("jid", reported_jid, { xmlns = "urn:xmpp:jid:0" });
+
+ local reported_message_id = report:get_child_with_attr(
+ "stanza-id",
+ "urn:xmpp:sid:0",
+ "by",
+ reported_jid,
+ jid.prep
+ );
+
+ local reported_message, reported_message_time, reported_message_with;
+ if reported_message_id then
+ reported_message, reported_message_time, reported_message_with = archive:get(reporter_username, reported_message_id);
+ if jid.bare(reported_message_with) ~= event.jid then
+ reported_message = nil;
+ end
+ end
+
+ local body_text = render(body_template, {
+ reporter_jid = reporter_jid;
+ reported_jid = event.jid;
+ reported_message_time = dt.datetime(reported_message_time);
+ });
local message = st.message({ from = module.host })
+ :text_tag("body", body_text)
:add_child(report);
+ if reported_message then
+ reported_message.attr.xmlns = "jabber:client";
+ local fwd = st.stanza("forwarded", { xmlns = "urn:xmpp:forward:0" })
+ :tag("delay", { xmlns = "urn:xmpp:delay", stamp = dt.datetime(reported_message_time) }):up()
+ :add_child(reported_message);
+ message:add_child(fwd);
+ end
+
for destination in destinations do
- local m = st.clone(message);
- m.attr.to = destination;
- module:send(m);
+ send_report(destination, message);
+ end
+
+ if report_to_origin then
+ module:log("debug", "Sending report to origin server...");
+ get_origin_report_address(event.jid):next(function (origin_report_address)
+ if not origin_report_address then
+ module:log("warn", "Couldn't report to origin: no contact address found for %s", jid.host(event.jid));
+ return;
+ end
+ send_report(origin_report_address, message);
+ end);
end
end