next/dist/esm/server/lib/server-ipc/index.js

The React Framework

import { getNodeOptionsWithoutInspect } from "../utils";
import { errorToJSON } from "../../render";
import crypto from "crypto";
import isError from "../../../lib/is-error";
import { genRenderExecArgv } from "../worker-utils";
import { deserializeErr } from "./request-utils";
// we can't use process.send as jest-worker relies on
// it already and can cause unexpected message errors
// so we create an IPC server for communicating
export async function createIpcServer(server) {
    // Generate a random key in memory to validate messages from other processes.
    // This is just a simple guard against other processes attempting to send
    // traffic to the IPC server.
    const ipcValidationKey = crypto.randomBytes(32).toString("hex");
    const ipcServer = require("http").createServer(async (req, res)=>{
        try {
            const url = new URL(req.url || "/", "http://n");
            const key = url.searchParams.get("key");
            if (key !== ipcValidationKey) {
                return res.end();
            }
            const method = url.searchParams.get("method");
            const args = JSON.parse(url.searchParams.get("args") || "[]");
            if (!method || !Array.isArray(args)) {
                return res.end();
            }
            if (typeof server[method] === "function") {
                var _args_;
                if (method === "logErrorWithOriginalStack" && ((_args_ = args[0]) == null ? void 0 : _args_.stack)) {
                    args[0] = deserializeErr(args[0]);
                }
                let result = await server[method](...args);
                if (result && typeof result === "object" && result.stack) {
                    result = errorToJSON(result);
                }
                res.end(JSON.stringify(result || ""));
            }
        } catch (err) {
            if (isError(err) && err.code !== "ENOENT") {
                console.error(err);
            }
            res.end(JSON.stringify({
                err: {
                    name: err.name,
                    message: err.message,
                    stack: err.stack
                }
            }));
        }
    });
    const ipcPort = await new Promise((resolveIpc)=>{
        ipcServer.listen(0, "0.0.0.0", ()=>{
            const addr = ipcServer.address();
            if (addr && typeof addr === "object") {
                resolveIpc(addr.port);
            }
        });
    });
    return {
        ipcPort,
        ipcServer,
        ipcValidationKey
    };
}
export const createWorker = async (ipcPort, ipcValidationKey, isNodeDebugging, type, nextConfig)=>{
    const { initialEnv  } = require("@next/env");
    const useServerActions = !!nextConfig.experimental.serverActions;
    const { Worker  } = require("next/dist/compiled/jest-worker");
    const worker = new Worker(require.resolve("../render-server"), {
        numWorkers: 1,
        // TODO: do we want to allow more than 8 OOM restarts?
        maxRetries: 8,
        forkOptions: {
            env: {
                FORCE_COLOR: "1",
                ...initialEnv,
                // we don't pass down NODE_OPTIONS as it can
                // allow more memory usage than expected
                NODE_OPTIONS: getNodeOptionsWithoutInspect().replace(/--max-old-space-size=[\d]{1,}/, "").trim(),
                __NEXT_PRIVATE_RENDER_WORKER: type,
                __NEXT_PRIVATE_RENDER_WORKER_CONFIG: JSON.stringify(nextConfig),
                __NEXT_PRIVATE_ROUTER_IPC_PORT: ipcPort + "",
                __NEXT_PRIVATE_ROUTER_IPC_KEY: ipcValidationKey,
                __NEXT_PRIVATE_STANDALONE_CONFIG: process.env.__NEXT_PRIVATE_STANDALONE_CONFIG,
                NODE_ENV: process.env.NODE_ENV,
                ...type === "app" ? {
                    __NEXT_PRIVATE_PREBUNDLED_REACT: useServerActions ? "experimental" : "next"
                } : {},
                ...process.env.NEXT_CPU_PROF ? {
                    __NEXT_PRIVATE_CPU_PROFILE: `CPU.${type}-renderer`
                } : {}
            },
            execArgv: await genRenderExecArgv(isNodeDebugging, type)
        },
        exposedMethods: [
            "initialize",
            "deleteCache",
            "deleteAppClientCache",
            "clearModuleContext",
            "propagateServerField"
        ]
    });
    worker.getStderr().pipe(process.stderr);
    worker.getStdout().pipe(process.stdout);
    return worker;
};

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