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core/moduleapi.lua @ 9759:1af5106a2c34
util.http: Pre-generate urlencoding mappings (optimization)
Function calls are more expensive than table lookups
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 06 Jan 2019 10:39:33 +0100 |
parent | 9750:65432dc80d90 |
child | 9866:09cc8c856e5e |
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-- Prosody IM -- Copyright (C) 2008-2012 Matthew Wild -- Copyright (C) 2008-2012 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local array = require "util.array"; local set = require "util.set"; local it = require "util.iterators"; local logger = require "util.logger"; local pluginloader = require "util.pluginloader"; local timer = require "util.timer"; local resolve_relative_path = require"util.paths".resolve_relative_path; local st = require "util.stanza"; local cache = require "util.cache"; local errutil = require "util.error"; local promise = require "util.promise"; local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat; local error, setmetatable, type = error, setmetatable, type; local ipairs, pairs, select = ipairs, pairs, select; local tonumber, tostring = tonumber, tostring; local require = require; local pack = table.pack or require "util.table".pack; -- table.pack is only in 5.2 local unpack = table.unpack or unpack; --luacheck: ignore 113 -- renamed in 5.2 local prosody = prosody; local hosts = prosody.hosts; -- FIXME: This assert() is to try and catch an obscure bug (2013-04-05) local core_post_stanza = assert(prosody.core_post_stanza, "prosody.core_post_stanza is nil, please report this as a bug"); -- Registry of shared module data local shared_data = setmetatable({}, { __mode = "v" }); local NULL = {}; local api = {}; -- Returns the name of the current module function api:get_name() return self.name; end -- Returns the host that the current module is serving function api:get_host() return self.host; end function api:get_host_type() return (self.host == "*" and "global") or hosts[self.host].type or "local"; end function api:set_global() self.host = "*"; -- Update the logger local _log = logger.init("mod_"..self.name); self.log = function (self, ...) return _log(...); end; --luacheck: ignore self self._log = _log; self.global = true; end function api:add_feature(xmlns) self:add_item("feature", xmlns); end function api:add_identity(category, identity_type, name) self:add_item("identity", {category = category, type = identity_type, name = name}); end function api:add_extension(data) self:add_item("extension", data); end function api:fire_event(...) return (hosts[self.host] or prosody).events.fire_event(...); end function api:hook_object_event(object, event, handler, priority) self.event_handlers:set(object, event, handler, true); return object.add_handler(event, handler, priority); end function api:unhook_object_event(object, event, handler) self.event_handlers:set(object, event, handler, nil); return object.remove_handler(event, handler); end function api:hook(event, handler, priority) return self:hook_object_event((hosts[self.host] or prosody).events, event, handler, priority); end function api:hook_global(event, handler, priority) return self:hook_object_event(prosody.events, event, handler, priority); end function api:hook_tag(xmlns, name, handler, priority) if not handler and type(name) == "function" then -- If only 2 options then they specified no xmlns xmlns, name, handler, priority = nil, xmlns, name, handler; elseif not (handler and name) then self:log("warn", "Error: Insufficient parameters to module:hook_stanza()"); return; end return self:hook("stanza/"..(xmlns and (xmlns..":") or "")..name, function (data) return handler(data.origin, data.stanza, data); end, priority); end api.hook_stanza = api.hook_tag; -- COMPAT w/pre-0.9 function api:unhook(event, handler) return self:unhook_object_event((hosts[self.host] or prosody).events, event, handler); end function api:wrap_object_event(events_object, event, handler) return self:hook_object_event(assert(events_object.wrappers, "no wrappers"), event, handler); end function api:wrap_event(event, handler) return self:wrap_object_event((hosts[self.host] or prosody).events, event, handler); end function api:wrap_global(event, handler) return self:hook_object_event(prosody.events, event, handler); end function api:require(lib) local f, n = pluginloader.load_code_ext(self.name, lib, "lib.lua", self.environment); if not f then error("Failed to load plugin library '"..lib.."', error: "..n); end -- FIXME better error message return f(); end function api:depends(name) local modulemanager = require"core.modulemanager"; if self:get_option_inherited_set("modules_disabled", {}):contains(name) then error("Dependency on disabled module mod_"..name); end if not self.dependencies then self.dependencies = {}; self:hook("module-reloaded", function (event) if self.dependencies[event.module] and not self.reloading then self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module); modulemanager.reload(self.host, self.name); return; end end); self:hook("module-unloaded", function (event) if self.dependencies[event.module] then self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module); modulemanager.unload(self.host, self.name); end end); end local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name); if mod and mod.module.host == "*" and self.host ~= "*" and modulemanager.module_has_method(mod, "add_host") then mod = nil; -- Target is a shared module, so we still want to load it on our host end if not mod then local err; mod, err = modulemanager.load(self.host, name); if not mod then return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) )); end end self.dependencies[name] = true; return mod; end local function get_shared_table_from_path(module, tables, path) if path:sub(1,1) ~= "/" then -- Prepend default components local default_path_components = { module.host, module.name }; local n_components = select(2, path:gsub("/", "%1")); path = (n_components<#default_path_components and "/" or "") ..t_concat(default_path_components, "/", 1, #default_path_components-n_components).."/"..path; end local shared = tables[path]; if not shared then shared = {}; if path:match("%-cache$") then setmetatable(shared, { __mode = "kv" }); end tables[path] = shared; end return shared; end -- Returns a shared table at the specified virtual path -- Intentionally does not allow the table to be _set_, it -- is auto-created if it does not exist. function api:shared(path) if not self.shared_data then self.shared_data = {}; end local shared = get_shared_table_from_path(self, shared_data, path); self.shared_data[path] = shared; return shared; end function api:get_option(name, default_value) local config = require "core.configmanager"; local value = config.get(self.host, name); if value == nil then value = default_value; end return value; end function api:get_option_scalar(name, default_value) local value = self:get_option(name, default_value); if type(value) == "table" then if #value > 1 then self:log("error", "Config option '%s' does not take a list, using just the first item", name); end value = value[1]; end return value; end function api:get_option_string(name, default_value) local value = self:get_option_scalar(name, default_value); if value == nil then return nil; end return tostring(value); end function api:get_option_number(name, ...) local value = self:get_option_scalar(name, ...); local ret = tonumber(value); if value ~= nil and ret == nil then self:log("error", "Config option '%s' not understood, expecting a number", name); end return ret; end function api:get_option_boolean(name, ...) local value = self:get_option_scalar(name, ...); if value == nil then return nil; end local ret = value == true or value == "true" or value == 1 or nil; if ret == nil then ret = (value == false or value == "false" or value == 0); if ret then ret = false; else ret = nil; end end if ret == nil then self:log("error", "Config option '%s' not understood, expecting true/false", name); end return ret; end function api:get_option_array(name, ...) local value = self:get_option(name, ...); if value == nil then return nil; end if type(value) ~= "table" then return array{ value }; -- Assume any non-list is a single-item list end return array():append(value); -- Clone end function api:get_option_set(name, ...) local value = self:get_option_array(name, ...); if value == nil then return nil; end return set.new(value); end function api:get_option_inherited_set(name, ...) local value = self:get_option_set(name, ...); local global_value = self:context("*"):get_option_set(name, ...); if not value then return global_value; elseif not global_value then return value; end value:include(global_value); return value; end function api:get_option_path(name, default, parent) if parent == nil then parent = self:get_directory(); elseif prosody.paths[parent] then parent = prosody.paths[parent]; end local value = self:get_option_string(name, default); if value == nil then return nil; end return resolve_relative_path(parent, value); end function api:context(host) return setmetatable({host=host or "*"}, {__index=self,__newindex=self}); end function api:add_item(key, value) self.items = self.items or {}; self.items[key] = self.items[key] or {}; t_insert(self.items[key], value); self:fire_event("item-added/"..key, {source = self, item = value}); end function api:remove_item(key, value) local t = self.items and self.items[key] or NULL; for i = #t,1,-1 do if t[i] == value then t_remove(self.items[key], i); self:fire_event("item-removed/"..key, {source = self, item = value}); return value; end end end function api:get_host_items(key) local modulemanager = require"core.modulemanager"; local result = modulemanager.get_items(key, self.host) or {}; return result; end function api:handle_items(item_type, added_cb, removed_cb, existing) self:hook("item-added/"..item_type, added_cb); self:hook("item-removed/"..item_type, removed_cb); if existing ~= false then for _, item in ipairs(self:get_host_items(item_type)) do added_cb({ item = item }); end end end function api:provides(name, item) -- if not item then item = setmetatable({}, { __index = function(t,k) return rawget(self.environment, k); end }); end if not item then item = {} for k,v in pairs(self.environment) do if k ~= "module" then item[k] = v; end end end if not item.name then local item_name = self.name; -- Strip a provider prefix to find the item name -- (e.g. "auth_foo" -> "foo" for an auth provider) if item_name:find(name.."_", 1, true) == 1 then item_name = item_name:sub(#name+2); end item.name = item_name; end item._provided_by = self.name; self:add_item(name.."-provider", item); end function api:send(stanza, origin) return core_post_stanza(origin or hosts[self.host], stanza); end function api:send_iq(stanza, origin, timeout) local iq_cache = self._iq_cache; if not iq_cache then iq_cache = cache.new(256, function (_, iq) iq.reject(errutil.new({ type = "wait", condition = "resource-constraint", text = "evicted from iq tracking cache" })); self:unhook(iq.result_event, iq.result_handler); self:unhook(iq.error_event, iq.error_handler); end); self._iq_cache = iq_cache; end return promise.new(function (resolve, reject) local event_type; if stanza.attr.from == self.host then event_type = "host"; else -- assume bare since we can't hook full jids event_type = "bare"; end local result_event = "iq-result/"..event_type.."/"..stanza.attr.id; local error_event = "iq-error/"..event_type.."/"..stanza.attr.id; local cache_key = event_type.."/"..stanza.attr.id; local function result_handler(event) if event.stanza.attr.from == stanza.attr.to then resolve(event); return true; end end local function error_handler(event) if event.stanza.attr.from == stanza.attr.to then reject(errutil.from_stanza(event.stanza), event); return true; end end if iq_cache:get(cache_key) then reject(errutil.new({ type = "modify", condition = "conflict", text = "iq stanza id attribute already used", })); return; end self:hook(result_event, result_handler); self:hook(error_event, error_handler); local timeout_handle = self:add_timer(timeout or 120, function () reject(errutil.new({ type = "wait", condition = "remote-server-timeout", text = "IQ stanza timed out", })); self:unhook(result_event, result_handler); self:unhook(error_event, error_handler); iq_cache:set(cache_key, nil); end); local ok = iq_cache:set(cache_key, { reject = reject, resolve = resolve, timeout_handle = timeout_handle, result_event = result_event, error_event = error_event, result_handler = result_handler, error_handler = error_handler; }); if not ok then reject(errutil.new({ type = "wait", condition = "internal-server-error", text = "Could not store IQ tracking data" })); return; end self:send(stanza, origin); end); end function api:broadcast(jids, stanza, iter) for jid in (iter or it.values)(jids) do local new_stanza = st.clone(stanza); new_stanza.attr.to = jid; self:send(new_stanza); end end local timer_methods = { } local timer_mt = { __index = timer_methods; } function timer_methods:stop( ) timer.stop(self.id); end timer_methods.disarm = timer_methods.stop function timer_methods:reschedule(delay) timer.reschedule(self.id, delay) end local function timer_callback(now, id, t) --luacheck: ignore 212/id if t.module_env.loaded == false then return; end return t.callback(now, unpack(t, 1, t.n)); end function api:add_timer(delay, callback, ...) local t = pack(...) t.module_env = self; t.callback = callback; t.id = timer.add_task(delay, timer_callback, t); return setmetatable(t, timer_mt); end local path_sep = package.config:sub(1,1); function api:get_directory() return self.path and (self.path:gsub("%"..path_sep.."[^"..path_sep.."]*$", "")) or nil; end function api:load_resource(path, mode) path = resolve_relative_path(self:get_directory(), path); return io.open(path, mode); end function api:open_store(name, store_type) return require"core.storagemanager".open(self.host, name or self.name, store_type); end function api:measure(name, stat_type) local measure = require "core.statsmanager".measure; return measure(stat_type, "/"..self.host.."/mod_"..self.name.."/"..name); end function api:measure_object_event(events_object, event_name, stat_name) local m = self:measure(stat_name or event_name, "times"); local function handler(handlers, _event_name, _event_data) local finished = m(); local ret = handlers(_event_name, _event_data); finished(); return ret; end return self:hook_object_event(events_object, event_name, handler); end function api:measure_event(event_name, stat_name) return self:measure_object_event((hosts[self.host] or prosody).events.wrappers, event_name, stat_name); end function api:measure_global_event(event_name, stat_name) return self:measure_object_event(prosody.events.wrappers, event_name, stat_name); end return api;