view mod_statistics_statsman/mod_statistics_statsman.lua @ 5265:f845c218e52c

mod_http_oauth2: Allow revoking a token without OAuth client credentials If you have a valid token, and you're not supposed to have it, revoking it seems the most responsible thing to do with it, so it should be allowed, while if you are supposed to have it, you should also be allowed to revoke it.
author Kim Alvefur <zash@zash.se>
date Tue, 21 Mar 2023 22:02:38 +0100
parents bac3dae031ee
children
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module:set_global();

local statsman = require "core.statsmanager";
local time_now = require "util.time".now;
local filters = require "util.filters";
local serialize = require "util.serialization".serialize;

assert(statsman.get_stats, "not compatible with trunk based on openmetrics");

local statistics_interval = module:context("*"):get_option_number("statistics_interval", 60);
if module:context("*"):get_option("statistics", "internal") ~= "internal" then
	module:log("error", "Not using internal statistics, can't do anyting");
	return;
end

local sessions = {};

local name_map = {
	["start_time"] = "up_since";
	["cpu.percent:amount"] = "cpu";
	["cpu.clock:amount"] = "cpu_total";
	["memory.allocated_mmap:amount"] = "memory_allocated_mmap";
	["memory.allocated:amount"] = "memory_allocated";
	["memory.lua:amount"] = "memory_lua";
	["memory.returnable:amount"] = "memory_returnable";
	["memory.rss:amount"] = "memory_rss";
	["memory.total:amount"] = "memory_total";
	["memory.unused:amount"] = "memory_unused";
	["memory.used:amount"] = "memory_used";
	["/*/mod_c2s/connections:amount"] = "total_c2s";
	["/*/mod_s2s/connections:amount"] = "total_s2s";
};

local function push_stat(conn, name, value)
	local value_str = serialize(value);
	name = name_map[name] or name;
	return conn:write((("STAT %q (%s)\n"):format(name, value_str):gsub("\\\n", "\\n")));
end

local function push_stat_to_all(name, value)
	for conn in pairs(sessions) do
		push_stat(conn, name, value);
	end
end

local session_stats_tpl = ([[{
	message_in = %d, message_out = %d;
	presence_in = %d, presence_out = %d;
	iq_in = %d, iq_out = %d;
	bytes_in = %d, bytes_out = %d;
}]]):gsub("%s", "");


local jid_fields = {
	c2s = "full_jid";
	s2sin = "from_host";
	s2sout = "to_host";
	component = "host";
};

local function push_session_to_all(session, stats)
	local id = tostring(session):match("[a-f0-9]+$"); -- FIXME: Better id? :/
	local stanzas_in, stanzas_out = stats.stanzas_in, stats.stanzas_out;
	local s = (session_stats_tpl):format(
		stanzas_in.message, stanzas_out.message,
		stanzas_in.presence, stanzas_out.presence,
		stanzas_in.iq, stanzas_out.iq,
		stats.bytes_in, stats.bytes_out);
	local jid = session[jid_fields[session.type]] or "";
	for conn in pairs(sessions) do
		conn:write(("SESS %q %q %s\n"):format(id, jid, s));
	end
end

local active_sessions = {};

-- Network listener
local listener = {};

function listener.onconnect(conn)
	sessions[conn] = true;
	push_stat(conn, "version", prosody.version);
	push_stat(conn, "start_time", prosody.start_time);
	push_stat(conn, "statistics_interval", statistics_interval);
	push_stat(conn, "time", time_now());
	local stats = statsman.get_stats();
	for name, value in pairs(stats) do
		push_stat(conn, name, value);
	end
	conn:write("\n"); -- Signal end of first batch (for non-streaming clients)
end

function listener.onincoming(conn, data) -- luacheck: ignore 212
	-- Discarded
end

function listener.ondisconnect(conn)
	sessions[conn] = nil;
end

function listener.onreadtimeout()
	return true;
end

local add_statistics_filter; -- forward decl
if prosody and prosody.arg then -- ensures we aren't in prosodyctl
	setmetatable(active_sessions, {
		__index = function ( t, k )
			local v = {
				bytes_in = 0, bytes_out = 0;
				stanzas_in = {
					message = 0, presence = 0, iq = 0;
				};
				stanzas_out = {
					message = 0, presence = 0, iq = 0;
				};
			}
			rawset(t, k, v);
			return v;
		end
	});
	local function handle_stanza_in(stanza, session)
		local s = active_sessions[session].stanzas_in;
		local n = s[stanza.name];
		if n then
			s[stanza.name] = n + 1;
		end
		return stanza;
	end
	local function handle_stanza_out(stanza, session)
		local s = active_sessions[session].stanzas_out;
		local n = s[stanza.name];
		if n then
			s[stanza.name] = n + 1;
		end
		return stanza;
	end
	local function handle_bytes_in(bytes, session)
		local s = active_sessions[session];
		s.bytes_in = s.bytes_in + #bytes;
		return bytes;
	end
	local function handle_bytes_out(bytes, session)
		local s = active_sessions[session];
		s.bytes_out = s.bytes_out + #bytes;
		return bytes;
	end
	function add_statistics_filter(session)
		filters.add_filter(session, "stanzas/in", handle_stanza_in);
		filters.add_filter(session, "stanzas/out", handle_stanza_out);
		filters.add_filter(session, "bytes/in", handle_bytes_in);
		filters.add_filter(session, "bytes/out", handle_bytes_out);
	end
end


function module.load()
	if not(prosody and prosody.arg) then
		return;
	end
	filters.add_filter_hook(add_statistics_filter);

	module:add_timer(1, function ()
		for session, session_stats in pairs(active_sessions) do
			active_sessions[session] = nil;
			push_session_to_all(session, session_stats);
		end
		return 1;
	end);

	module:hook("stats-updated", function (event)
		local stats = event.changed_stats;
		push_stat_to_all("time", time_now());
		for name, value in pairs(stats) do
			push_stat_to_all(name, value);
		end
	end);

	module:hook("server-stopping", function ()
		push_stat_to_all("stop_time", time_now());
	end);
end
function module.unload()
	filters.remove_filter_hook(add_statistics_filter);
end

if prosody and prosody.arg then
	module:provides("net", {
		default_port = 5782;
		listener = listener;
		private = true;
	});
end