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mod_report_forward/mod_report_forward.lua @ 5878:fcfe490de8a4
mod_spam_report_forwarder: Rename to mod_report_forward
This module is not only about spam reports.
author | Matthew Wild <mwild1@gmail.com> |
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date | Sun, 03 Mar 2024 16:03:27 +0000 |
parent | 5871:d00af6ebb326 |
child | 5879:05356f2d4425 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_report_forward/mod_report_forward.lua Sun Mar 03 16:03:27 2024 +0000 @@ -0,0 +1,139 @@ +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("report_forward_to", {}); + +local archive = module:open("archive"); + +local cache_size = module:get_option_number("report_forward_contact_cache_size", 256); +local report_to_origin = module:get_option_boolean("report_forward_to_origin", true); +local contact_lookup_timeout = module:get_option_number("report_forward_contact_lookup_timeout", 180); + +local body_template = module:get_option_string("report_forward_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 + local parsed = url.parse(field:get_child_text("value")); + if parsed.scheme == "xmpp" and parsed.path and not parsed.query then + return parsed.path; + end + 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", 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 + 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 + +module:hook("spam_reporting/abuse-report", forward_report, -1); +module:hook("spam_reporting/spam-report", forward_report, -1); +module:hook("spam_reporting/unknown-report", forward_report, -1);