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/*
This file is part of TALER
(C) 2016 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Imports
*/
import { Logger } from "@gnu-taler/taler-util";
import os from "os";
import url from "url";
import { nativeCryptoR } from "../cryptoImplementation.js";
import { CryptoWorkerFactory } from "./crypto-dispatcher.js";
import { CryptoWorker } from "./cryptoWorkerInterface.js";
import { processRequestWithImpl } from "./worker-common.js";
const logger = new Logger("nodeThreadWorker.ts");
const f = import.meta.url
? url.fileURLToPath(import.meta.url)
: "__not_available__";
const workerCode = `
// Try loading the glue library for embedded
try {
require("akono");
} catch (e) {
try {
require("iono");
} catch (e2) {
// Probably we're not on embedded ...
}
}
const worker_threads = require('worker_threads');
const parentPort = worker_threads.parentPort;
let tw;
try {
tw = require("${f}");
} catch (e) {
console.warn("could not load from ${f}");
}
if (!tw) {
try {
tw = require("@gnu-taler/taler-wallet-embedded");
} catch (e) {
console.warn("could not load taler-wallet-embedded either");
throw e;
}
}
if (typeof tw.handleWorkerMessage !== "function") {
throw Error("module loaded for crypto worker lacks handleWorkerMessage");
}
if (typeof tw.handleWorkerError !== "function") {
throw Error("module loaded for crypto worker lacks handleWorkerError");
}
parentPort.on("message", tw.handleWorkerMessage);
parentPort.on("error", tw.handleWorkerError);
`;
/**
* This function is executed in the worker thread to handle
* a message.
*/
export function handleWorkerMessage(msg: any): void {
const handleRequest = async (): Promise<void> => {
const responseMsg = await processRequestWithImpl(msg, nativeCryptoR);
try {
// eslint-disable-next-line @typescript-eslint/no-var-requires
const _r = "require";
const worker_threads: typeof import("worker_threads") =
module[_r]("worker_threads");
// const worker_threads = require("worker_threads");
const p = worker_threads.parentPort;
if (p) {
p.postMessage(responseMsg);
} else {
logger.error("parent port not available (not running in thread?");
}
} catch (e: any) {
logger.error(`error in node worker: ${e.stack ?? e.toString()}`);
return;
}
};
handleRequest();
}
export function handleWorkerError(e: Error): void {
logger.error(`got error from worker: ${e.stack ?? e.toString()}`);
}
export class NodeThreadCryptoWorkerFactory implements CryptoWorkerFactory {
startWorker(): CryptoWorker {
if (typeof require === "undefined") {
throw Error("cannot make worker, require(...) not defined");
}
return new NodeThreadCryptoWorker();
}
getConcurrency(): number {
return Math.max(1, os.cpus().length - 1);
}
}
/**
* Worker implementation that uses node subprocesses.
*/
class NodeThreadCryptoWorker implements CryptoWorker {
/**
* Function to be called when we receive a message from the worker thread.
*/
onmessage: undefined | ((m: any) => void);
/**
* Function to be called when we receive an error from the worker thread.
*/
onerror: undefined | ((m: any) => void);
private nodeWorker: import("worker_threads").Worker;
constructor() {
// eslint-disable-next-line @typescript-eslint/no-var-requires
const _r = "require";
const worker_threads = module[_r]("worker_threads");
logger.trace("starting node crypto worker");
this.nodeWorker = new worker_threads.Worker(workerCode, { eval: true });
this.nodeWorker.on("error", (err: Error) => {
logger.error("error in node worker:", err);
if (this.onerror) {
this.onerror(err);
}
});
this.nodeWorker.on("exit", (err) => {
logger.trace(`worker exited with code ${err}`);
});
this.nodeWorker.on("message", (v: any) => {
if (this.onmessage) {
this.onmessage(v);
}
});
//this.nodeWorker.unref();
}
/**
* Add an event listener for either an "error" or "message" event.
*/
addEventListener(event: "message" | "error", fn: (x: any) => void): void {
switch (event) {
case "message":
this.onmessage = fn;
break;
case "error":
this.onerror = fn;
break;
}
}
/**
* Send a message to the worker thread.
*/
postMessage(msg: any): void {
this.nodeWorker.postMessage(msg);
}
/**
* Forcibly terminate the worker thread.
*/
terminate(): void {
this.nodeWorker.terminate();
}
}
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