to-do/todo/backend/node_modules/mongodb/lib/client-side-encryption/mongocryptd_manager.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MongocryptdManager = void 0;
const error_1 = require("../error");
/**
 * @internal
 * An internal class that handles spawning a mongocryptd.
 */
class MongocryptdManager {
    constructor(extraOptions = {}) {
        this.spawnPath = '';
        this.spawnArgs = [];
        this.uri =
            typeof extraOptions.mongocryptdURI === 'string' && extraOptions.mongocryptdURI.length > 0
                ? extraOptions.mongocryptdURI
                : MongocryptdManager.DEFAULT_MONGOCRYPTD_URI;
        this.bypassSpawn = !!extraOptions.mongocryptdBypassSpawn;
        if (Object.hasOwn(extraOptions, 'mongocryptdSpawnPath') && extraOptions.mongocryptdSpawnPath) {
            this.spawnPath = extraOptions.mongocryptdSpawnPath;
        }
        if (Object.hasOwn(extraOptions, 'mongocryptdSpawnArgs') &&
            Array.isArray(extraOptions.mongocryptdSpawnArgs)) {
            this.spawnArgs = this.spawnArgs.concat(extraOptions.mongocryptdSpawnArgs);
        }
        if (this.spawnArgs
            .filter(arg => typeof arg === 'string')
            .every(arg => arg.indexOf('--idleShutdownTimeoutSecs') < 0)) {
            this.spawnArgs.push('--idleShutdownTimeoutSecs', '60');
        }
    }
    /**
     * Will check to see if a mongocryptd is up. If it is not up, it will attempt
     * to spawn a mongocryptd in a detached process, and then wait for it to be up.
     */
    async spawn() {
        const cmdName = this.spawnPath || 'mongocryptd';
        // eslint-disable-next-line @typescript-eslint/no-require-imports
        const { spawn } = require('child_process');
        // Spawned with stdio: ignore and detached: true
        // to ensure child can outlive parent.
        this._child = spawn(cmdName, this.spawnArgs, {
            stdio: 'ignore',
            detached: true
        });
        this._child.on('error', () => {
            // From the FLE spec:
            // "The stdout and stderr of the spawned process MUST not be exposed in the driver
            // (e.g. redirect to /dev/null). Users can pass the argument --logpath to
            // extraOptions.mongocryptdSpawnArgs if they need to inspect mongocryptd logs.
            // If spawning is necessary, the driver MUST spawn mongocryptd whenever server
            // selection on the MongoClient to mongocryptd fails. If the MongoClient fails to
            // connect after spawning, the server selection error is propagated to the user."
            // The AutoEncrypter and MongoCryptdManager should work together to spawn
            // mongocryptd whenever necessary.  Additionally, the `mongocryptd` intentionally
            // shuts down after 60s and gets respawned when necessary.  We rely on server
            // selection timeouts when connecting to the `mongocryptd` to inform users that something
            // has been configured incorrectly.  For those reasons, we suppress stderr from
            // the `mongocryptd` process and immediately unref the process.
        });
        // unref child to remove handle from event loop
        this._child.unref();
    }
    /**
     * @returns the result of `fn` or rejects with an error.
     */
    async withRespawn(fn) {
        try {
            const result = await fn();
            return result;
        }
        catch (err) {
            // If we are not bypassing spawning, then we should retry once on a MongoTimeoutError (server selection error)
            const shouldSpawn = err instanceof error_1.MongoNetworkTimeoutError && !this.bypassSpawn;
            if (!shouldSpawn) {
                throw err;
            }
        }
        await this.spawn();
        const result = await fn();
        return result;
    }
}
exports.MongocryptdManager = MongocryptdManager;
MongocryptdManager.DEFAULT_MONGOCRYPTD_URI = 'mongodb://localhost:27020';
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