108 lines
2.7 KiB
JavaScript
108 lines
2.7 KiB
JavaScript
/**
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* Copyright 2013-2018 Zaid Abdulla
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*
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* This file is part of GenieACS.
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*
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* GenieACS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* GenieACS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with GenieACS. If not, see <http://www.gnu.org/licenses/>.
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*/
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"use strict";
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const childProcess = require("child_process");
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const crypto = require("crypto");
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const config = require("./config");
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const TIMEOUT = config.get("EXT_TIMEOUT");
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const processes = {};
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const jobs = {};
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function messageHandler(message) {
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const func = jobs[message[0]];
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if (func) {
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delete jobs[message[0]];
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func(null, message[1], message[2]);
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}
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}
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function run(args, callback) {
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const scriptName = args[0];
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if (!processes[scriptName]) {
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const p = childProcess.fork("lib/extension-wrapper", [scriptName]);
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processes[scriptName] = p;
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p.on("error", () => {
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if (processes[scriptName] === p) {
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kill(processes[scriptName]);
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delete processes[scriptName];
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}
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});
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p.on("disconnect", () => {
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if (processes[scriptName] === p) {
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kill(processes[scriptName]);
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delete processes[scriptName];
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}
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});
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p.on("message", messageHandler);
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}
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const id = crypto.randomBytes(8).toString("hex");
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jobs[id] = callback;
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setTimeout(() => {
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if (id in jobs) {
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delete jobs[id];
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callback(null, { code: "timeout", message: "Extension timed out" });
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}
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}, TIMEOUT);
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return processes[scriptName].send([id, args.slice(1)]);
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}
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function kill(process, callback) {
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if (process.signalCode !== null || process.exitCode !== null) return;
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const timeToKill = Date.now() + 5000;
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process.kill();
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const t = setInterval(() => {
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if (process.signalCode !== null || process.exitCode !== null) {
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clearInterval(t);
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if (callback) callback();
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} else if (Date.now() > timeToKill) {
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process.kill("SIGKILL");
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clearInterval(t);
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if (callback) callback();
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}
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}, 100);
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}
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function killAll(callback) {
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let counter = 1;
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for (const n in processes) {
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++counter;
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kill(processes[n], () => {
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if (--counter == 0 && callback) callback();
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});
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delete processes[n];
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}
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if (--counter == 0 && callback) callback();
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}
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exports.run = run;
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exports.killAll = killAll;
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