File

plugins/mod_scansion_record.lua @ 13126:d043834f15d2

mod_http: Use RFC 7239 Forwarded header to find original client IP Prefer over X-Forwarded-* since it has an actual specification. Main practical difference is that Forwarded may carry more properties than only the IP address since it is a structured header. Since we parse it into an array, it is easier to do the logical thing and iterate backwards trough proxies until an untrusted one is encountered. Compare the handling of X-Forwarded-For. The 'secure' field now accounts for the full chain of proxies, which must be secure all the way to be considered secure.
author Kim Alvefur <zash@zash.se>
date Sat, 03 Jun 2023 17:10:04 +0200 (2023-06-03)
parent 12977:74b9e05af71e
line wrap: on
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local names = { "Romeo", "Juliet", "Mercutio", "Tybalt", "Benvolio" };
local devices = { "", "phone", "laptop", "tablet", "toaster", "fridge", "shoe" };
local users = {};

local filters = require "prosody.util.filters";
local id = require "prosody.util.id";
local dt = require "prosody.util.datetime";
local dm = require "prosody.util.datamanager";
local st = require "prosody.util.stanza";

local record_id = id.short():lower();
local record_date = os.date("%Y%b%d"):lower();
local header_file = dm.getpath(record_id, "scansion", record_date, "scs", true);
local record_file = dm.getpath(record_id, "scansion", record_date, "log", true);

local head = io.open(header_file, "w");
local scan = io.open(record_file, "w+");

local function record(string)
	scan:write(string);
	scan:flush();
end

local function record_header(string)
	head:write(string);
	head:flush();
end

local function record_object(class, name, props)
	head:write(("[%s] %s\n"):format(class, name));
	for k,v in pairs(props) do
		head:write(("\t%s: %s\n"):format(k, v));
	end
	head:write("\n");
	head:flush();
end

local function record_event(session, event)
	record(session.scansion_id.." "..event.."\n\n");
end

local function record_stanza(stanza, session, verb)
	local flattened = tostring(stanza:indent(2, "\t"));
	record(session.scansion_id.." "..verb..":\n\t"..flattened.."\n\n");
end

local function record_stanza_in(stanza, session)
	if stanza.attr.xmlns == nil then
		local copy = st.clone(stanza);
		copy.attr.from = nil;
		record_stanza(copy, session, "sends")
	end
	return stanza;
end

local function record_stanza_out(stanza, session)
	if stanza.attr.xmlns == nil then
		if not (stanza.name == "iq" and stanza:get_child("bind", "urn:ietf:params:xml:ns:xmpp-bind")) then
			local copy = st.clone(stanza);
			if copy.attr.to == session.full_jid then
				copy.attr.to = nil;
			end
			record_stanza(copy, session, "receives");
		end
	end
	return stanza;
end

module:hook("resource-bind", function (event)
	local session = event.session;
	if not users[session.username] then
		users[session.username] = {
			character = table.remove(names, 1) or id.short();
			devices = {};
			n_devices = 0;
		};
	end
	local user = users[session.username];
	local device = user.devices[session.resource];
	if not device then
		user.n_devices = user.n_devices + 1;
		device = devices[user.n_devices] or ("device"..id.short());
		user.devices[session.resource] = device;
	end
	session.scansion_character = user.character;
	session.scansion_device = device;
	session.scansion_id = user.character..(device ~= "" and "'s "..device or device);

	record_object("Client", session.scansion_id, {
		jid = session.full_jid,
		password = "password",
	});

	module:log("info", "Connected: %s", session.scansion_id);
	record_event(session, "connects");

	filters.add_filter(session, "stanzas/in", record_stanza_in);
	filters.add_filter(session, "stanzas/out", record_stanza_out);
end);

module:hook("resource-unbind", function (event)
	local session = event.session;
	if session.scansion_id then
		record_event(session, "disconnects");
	end
end)

record_header("# mod_scansion_record on host '"..module.host.."' recording started "..dt.datetime().."\n\n");

record[[
-----

]]

module:hook_global("server-stopping", function ()
	record("# recording ended on "..dt.datetime().."\n");
	module:log("info", "Scansion recording available in %s", header_file);
end);

prosody.events.add_handler("server-cleanup", function ()
	scan:seek("set", 0);
	for line in scan:lines() do
		head:write(line, "\n");
	end
	scan:close();
	os.remove(record_file);
	head:close()
end);