Mercurial > prosody-modules
view mod_ogp/mod_ogp.lua @ 5298:12f7d8b901e0
mod_audit: Support for adding location (GeoIP) to audit events
This can be more privacy-friendly than logging full IP addresses, and also
more informative to a user - IP addresses don't mean much to the average
person, however if they see activity from outside their expected country, they
can immediately identify suspicious activity.
As with IPs, this field is configurable for deployments that would like to
disable it. Location is also not logged when the geoip library is not
available.
author | Matthew Wild <mwild1@gmail.com> |
---|---|
date | Sat, 01 Apr 2023 13:11:53 +0100 |
parents | 09f0911c735d |
children |
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local mod_muc = module:depends("muc") local http = require "net.http" local st = require "util.stanza" local url_pattern = [[https?://%S+]] local domain_pattern = '^%w+://([^/]+)' local xmlns_fasten = "urn:xmpp:fasten:0" local xmlns_xhtml = "http://www.w3.org/1999/xhtml" local allowlist = module:get_option_set("ogp_domain_allowlist", module:get_option_set("ogp_domain_whitelist", {})) local denylist = module:get_option_set("ogp_domain_denylist", {}) local function is_allowed(domain) if allowlist:empty() then return true end if allowlist:contains(domain) then return true end return false end local function is_denied(domain) if denylist:empty() then return false end if denylist:contains(domain) then return true end return false end local function fetch_ogp_data(room, url, origin_id) if not url then return; end local domain = url:match(domain_pattern); if is_denied(domain) or not is_allowed(domain) then return; end http.request( url, nil, function(response_body, response_code, _) if response_code ~= 200 then module:log("debug", "Call to %s returned code %s and body %s", url, response_code, response_body) return end local to = room.jid local from = room and room.jid or module.host local fastening = st.message({to = to, from = from, type = 'groupchat'}):tag("apply-to", {xmlns = xmlns_fasten, id = origin_id}) local found_metadata = false local message_body = "" local meta_pattern = [[<meta (.-)/?>]] for match in response_body:gmatch(meta_pattern) do local property = match:match([[property=%s*["']?(og:.-)["']?%s]]) if not property then property = match:match([[property=["']?(og:.-)["']$]]) end local content = match:match([[content=%s*["'](.-)["']%s]]) if not content then content = match:match([[content=["']?(.-)["']$]]) end if not content then content = match:match([[content=(.-) property]]) end if not content then content = match:match([[content=(.-)$]]) end if property and content then module:log("debug", property .. "\t" .. content) fastening:tag( "meta", { xmlns = xmlns_xhtml, property = property, content = content } ):up() found_metadata = true message_body = message_body .. property .. "\t" .. content .. "\n" end end if found_metadata then mod_muc.get_room_from_jid(room.jid):broadcast_message(fastening) end module:log("debug", tostring(fastening)) end ) end local function ogp_handler(event) local room, stanza = event.room, st.clone(event.stanza) local body = stanza:get_child_text("body") if not body then return; end local origin_id = stanza:find("{urn:xmpp:sid:0}origin-id@id") if not origin_id then return; end for url in body:gmatch(url_pattern) do fetch_ogp_data(room, url, origin_id); end end module:hook("muc-occupant-groupchat", ogp_handler) module:hook("muc-message-is-historic", function (event) local fastening = event.stanza:get_child('apply-to', xmlns_fasten) if fastening and fastening:get_child('meta', xmlns_xhtml) then return true end end);