net.server_epoll: Add support for systemd socket activation
Allows creating listening sockets and accepting client connections
before Prosody starts.
This is unlike normal Prosody dynamic resource management, where ports
may added and removed at any time, and the ports defined by the config.
Weird things happen if these are closed (e.g. due to reload) so here we
prevent closing and ensure sockets are reused when opened again.
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
-- luacheck: ignore 113/CFG_PLUGINDIR
local dir_sep, path_sep = package.config:match("^(%S+)%s(%S+)");
local lua_version = _VERSION:match(" (.+)$");
local plugin_dir = {};
for path in (CFG_PLUGINDIR or "./plugins/"):gsub("[/\\]", dir_sep):gmatch("[^"..path_sep.."]+") do
path = path..dir_sep; -- add path separator to path end
path = path:gsub(dir_sep..dir_sep.."+", dir_sep); -- coalesce multiple separators
plugin_dir[#plugin_dir + 1] = path;
end
local io_open = io.open;
local envload = require "prosody.util.envload".envload;
local pluginloader_methods = {};
local pluginloader_mt = { __index = pluginloader_methods };
function pluginloader_methods:load_file(names)
local file, err, path;
local load_filter_cb = self._options.load_filter_cb;
for i=1,#plugin_dir do
for j=1,#names do
path = plugin_dir[i]..names[j];
file, err = io_open(path);
if file then
local content = file:read("*a");
file:close();
local metadata;
if load_filter_cb then
path, content, metadata = load_filter_cb(path, content);
end
if content and path then
return content, path, metadata;
end
end
end
end
return file, err;
end
function pluginloader_methods:load_resource(plugin, resource)
resource = resource or "mod_"..plugin..".lua";
local names = {
"mod_"..plugin..dir_sep..plugin..dir_sep..resource; -- mod_hello/hello/mod_hello.lua
"mod_"..plugin..dir_sep..resource; -- mod_hello/mod_hello.lua
plugin..dir_sep..resource; -- hello/mod_hello.lua
resource; -- mod_hello.lua
"share"..dir_sep.."lua"..dir_sep..lua_version..dir_sep..resource;
"share"..dir_sep.."lua"..dir_sep..lua_version..dir_sep.."mod_"..plugin..dir_sep..resource;
};
return self:load_file(names);
end
function pluginloader_methods:load_code(plugin, resource, env)
local content, err, metadata = self:load_resource(plugin, resource);
if not content then return content, err; end
local path = err;
local f, err = envload(content, "@"..path, env);
if not f then return f, err; end
return f, path, metadata;
end
function pluginloader_methods:load_code_ext(plugin, resource, extension, env)
local content, err, metadata = self:load_resource(plugin, resource.."."..extension);
if not content and extension == "lib.lua" then
content, err, metadata = self:load_resource(plugin, resource..".lua");
end
if not content then
content, err, metadata = self:load_resource(resource, resource.."."..extension);
if not content then
return content, err;
end
end
local path = err;
local f, err = envload(content, "@"..path, env);
if not f then return f, err; end
return f, path, metadata;
end
local function init(options)
return setmetatable({
_options = options or {};
}, pluginloader_mt);
end
local function bind(self, method)
return function (...)
return method(self, ...);
end;
end
local default_loader = init();
return {
load_file = bind(default_loader, default_loader.load_file);
load_resource = bind(default_loader, default_loader.load_resource);
load_code = bind(default_loader, default_loader.load_code);
load_code_ext = bind(default_loader, default_loader.load_code_ext);
init = init;
};