File

tools/cfgdump.lua @ 11665:148075532021

net.server_epoll: Prevent stack overflow of opportunistic writes net.http.files serving a big enough file on a fast enough connection with opportunistic_writes enabled could trigger a stack overflow through repeatedly serving more data that immediately gets sent, draining the buffer and triggering more data to be sent. This also blocked the server on a single task until completion or an error. This change prevents nested opportunistic writes, which should prevent the stack overflow, at the cost of reduced download speed, but this is unlikely to be noticeable outside of Gbit networks. Speed at the cost of blocking other processing is not worth it, especially with the risk of stack overflow.
author Kim Alvefur <zash@zash.se>
date Sun, 11 Jul 2021 09:39:21 +0200
parent 11570:c3896c714a83
child 13142:879a6a33c21b
line wrap: on
line source

#!/usr/bin/env lua

-- cfgdump.lua prosody.cfg.lua [[host] option]

local s_format, print = string.format, print;
local printf = function(fmt, ...) return print(s_format(fmt, ...)); end
local it = require "util.iterators";
local function sort_anything(a, b)
	local typeof_a, typeof_b = type(a), type(b);
	if typeof_a ~= typeof_b then return typeof_a < typeof_b end
	return a < b -- should work for everything in a config file
end
local serialization = require "util.serialization";
local serialize = serialization.new and serialization.new({
	unquoted = true, table_iterator = function(t) return it.sorted_pairs(t, sort_anything); end,
}) or serialization.serialize;
local configmanager = require"core.configmanager";
local startup = require "util.startup";

startup.set_function_metatable();
local config_filename, onlyhost, onlyoption = ...;

local ok, _, err = configmanager.load(config_filename or "./prosody.cfg.lua", "lua");
assert(ok, err);

if onlyhost then
	if not onlyoption then
		onlyhost, onlyoption = "*", onlyhost;
	end
	if onlyhost ~= "*" then
		local component_module = configmanager.get(onlyhost, "component_module");

		if component_module == "component" then
			printf("Component %q", onlyhost);
		elseif component_module then
			printf("Component %q %q", onlyhost, component_module);
		else
			printf("VirtualHost %q", onlyhost);
		end
	end
	printf("%s = %s", onlyoption or "?", serialize(configmanager.get(onlyhost, onlyoption)));
	return;
end

local config = configmanager.getconfig();


for host, hostcfg in it.sorted_pairs(config) do
	local fixed = {};
	for option, value in it.sorted_pairs(hostcfg) do
		fixed[option] = value;
		if option:match("ports?$") or option:match("interfaces?$") then
			if option:match("s$") then
				if type(value) ~= "table" then
					fixed[option] = { value };
				end
			else
				if type(value) == "table" and #value > 1 then
					fixed[option] = nil;
					fixed[option.."s"] = value;
				end
			end
		end
	end
	config[host] = fixed;
end

local globals = config["*"]; config["*"] = nil;

local function printsection(section)
	local out, n = {}, 1;
	for k,v in it.sorted_pairs(section) do
		out[n], n = s_format("%s = %s", k, serialize(v)), n + 1;
	end
	table.sort(out);
	print(table.concat(out, "\n"));
end

print("-------------- Prosody Exported Configuration File -------------");
print();
print("------------------------ Global section ------------------------");
print();
printsection(globals);
print();

local has_components = nil;

print("------------------------ Virtual hosts -------------------------");

for host, hostcfg in it.sorted_pairs(config) do
	setmetatable(hostcfg, nil);
	hostcfg.defined = nil;

	if hostcfg.component_module == nil then
		print();
		printf("VirtualHost %q", host);
		printsection(hostcfg);
	else
		has_components = true
	end
end

print();

if has_components then
print("------------------------- Components ---------------------------");

	for host, hostcfg in it.sorted_pairs(config) do
		local component_module = hostcfg.component_module;
		hostcfg.component_module = nil;

		if component_module then
			print();
			if component_module == "component" then
				printf("Component %q", host);
			else
				printf("Component %q %q", host, component_module);
				hostcfg.component_module = nil;
				hostcfg.load_global_modules = nil;
			end
			printsection(hostcfg);
		end
	end
end

print()
print("------------------------- End of File --------------------------");