Basic implementation done, need to UTR changes + sync spec tests still

synced new test files

added support for error response

added api docs

made MongoServerError.errorResponse required + casted resulting type errors

test(NODE-5992): fix env var restoration in tests (#4017)

refactor(NODE-5903): add newline to stdio logging (#4018)

fix(NODE-5985): throw Nodejs' certificate expired error when TLS fails to connect instead of `CERT_HAS_EXPIRED` (#4014)

test(NODE-5962): gossip cluster time in utr (#4019)

chore(NODE-5997): update saslprep to ^1.1.5 (#4023)

feat(NODE-5968): container and Kubernetes awareness in client metadata (#4005)

fix(NODE-5993): memory leak in the `Connection` class (#4022)

added TODO(NODE-XXXX)

Author: aditi-khare-mongoDB

Diff for: package-lock.json

@@ -25,7 +25,7 @@
     "email": "[email protected]"
   },
   "dependencies": {
-    "@mongodb-js/saslprep": "^1.1.0",
+    "@mongodb-js/saslprep": "^1.1.5",
     "bson": "^6.4.0",
     "mongodb-connection-string-url": "^3.0.0"
   },

Diff for: package.json

@@ -25,7 +25,6 @@ import {
   type ConnectionOptions,
   CryptoConnection
 } from './connection';
-import type { ClientMetadata } from './handshake/client_metadata';
 import {
   MAX_SUPPORTED_SERVER_VERSION,
   MAX_SUPPORTED_WIRE_VERSION,
@@ -183,7 +182,7 @@ export interface HandshakeDocument extends Document {
   ismaster?: boolean;
   hello?: boolean;
   helloOk?: boolean;
-  client: ClientMetadata;
+  client: Document;
   compression: string[];
   saslSupportedMechs?: string;
   loadBalanced?: boolean;
@@ -200,11 +199,12 @@ export async function prepareHandshakeDocument(
   const options = authContext.options;
   const compressors = options.compressors ? options.compressors : [];
   const { serverApi } = authContext.connection;
+  const clientMetadata: Document = await options.extendedMetadata;
 
   const handshakeDoc: HandshakeDocument = {
     [serverApi?.version || options.loadBalanced === true ? 'hello' : LEGACY_HELLO_COMMAND]: 1,
     helloOk: true,
-    client: options.metadata,
+    client: clientMetadata,
     compression: compressors
   };
 
@@ -319,7 +319,6 @@ export async function makeSocket(options: MakeConnectionOptions): Promise<Stream
   const useTLS = options.tls ?? false;
   const noDelay = options.noDelay ?? true;
   const connectTimeoutMS = options.connectTimeoutMS ?? 30000;
-  const rejectUnauthorized = options.rejectUnauthorized ?? true;
   const existingSocket = options.existingSocket;
 
   let socket: Stream;
@@ -375,10 +374,6 @@ export async function makeSocket(options: MakeConnectionOptions): Promise<Stream
     return socket;
   } catch (error) {
     socket.destroy();
-    if ('authorizationError' in socket && socket.authorizationError != null && rejectUnauthorized) {
-      // TODO(NODE-5192): wrap this with a MongoError subclass
-      throw socket.authorizationError;
-    }
     throw error;
   } finally {
     socket.setTimeout(0);

Diff for: src/cmap/connect.ts

@@ -1,6 +1,5 @@
 import { type Readable, Transform, type TransformCallback } from 'stream';
 import { clearTimeout, setTimeout } from 'timers';
-import { promisify } from 'util';
 
 import type { BSONSerializeOptions, Document, ObjectId } from '../bson';
 import type { AutoEncrypter } from '../client-side-encryption/auto_encrypter';
@@ -37,7 +36,7 @@ import {
   maxWireVersion,
   type MongoDBNamespace,
   now,
-  promiseWithResolvers,
+  once,
   uuidV4
 } from '../utils';
 import type { WriteConcern } from '../write_concern';
@@ -119,6 +118,8 @@ export interface ConnectionOptions
   cancellationToken?: CancellationToken;
   metadata: ClientMetadata;
   /** @internal */
+  extendedMetadata: Promise<Document>;
+  /** @internal */
   mongoLogger?: MongoLogger | undefined;
 }
 
@@ -180,18 +181,18 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
    * Once connection is established, command logging can log events (if enabled)
    */
   public established: boolean;
+  /** Indicates that the connection (including underlying TCP socket) has been closed. */
+  public closed = false;
 
   private lastUseTime: number;
   private clusterTime: Document | null = null;
+  private error: Error | null = null;
+  private dataEvents: AsyncGenerator<Buffer, void, void> | null = null;
 
   private readonly socketTimeoutMS: number;
   private readonly monitorCommands: boolean;
   private readonly socket: Stream;
-  private readonly controller: AbortController;
-  private readonly signal: AbortSignal;
   private readonly messageStream: Readable;
-  private readonly socketWrite: (buffer: Uint8Array) => Promise<void>;
-  private readonly aborted: Promise<never>;
 
   /** @event */
   static readonly COMMAND_STARTED = COMMAND_STARTED;
@@ -211,6 +212,7 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
   constructor(stream: Stream, options: ConnectionOptions) {
     super();
 
+    this.socket = stream;
     this.id = options.id;
     this.address = streamIdentifier(stream, options);
     this.socketTimeoutMS = options.socketTimeoutMS ?? 0;
@@ -223,39 +225,12 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
     this.generation = options.generation;
     this.lastUseTime = now();
 
-    this.socket = stream;
-
-    // TODO: Remove signal from connection layer
-    this.controller = new AbortController();
-    const { signal } = this.controller;
-    this.signal = signal;
-    const { promise: aborted, reject } = promiseWithResolvers<never>();
-    aborted.then(undefined, () => null); // Prevent unhandled rejection
-    this.signal.addEventListener(
-      'abort',
-      function onAbort() {
-        reject(signal.reason);
-      },
-      { once: true }
-    );
-    this.aborted = aborted;
-
     this.messageStream = this.socket
       .on('error', this.onError.bind(this))
       .pipe(new SizedMessageTransform({ connection: this }))
       .on('error', this.onError.bind(this));
     this.socket.on('close', this.onClose.bind(this));
     this.socket.on('timeout', this.onTimeout.bind(this));
-
-    const socketWrite = promisify(this.socket.write.bind(this.socket));
-    this.socketWrite = async buffer => {
-      return Promise.race([socketWrite(buffer), this.aborted]);
-    };
-  }
-
-  /** Indicates that the connection (including underlying TCP socket) has been closed. */
-  public get closed(): boolean {
-    return this.signal.aborted;
   }
 
   public get hello() {
@@ -306,7 +281,7 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
     this.lastUseTime = now();
   }
 
-  public onError(error?: Error) {
+  public onError(error: Error) {
     this.cleanup(error);
   }
 
@@ -349,13 +324,15 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
    *
    * This method does nothing if the connection is already closed.
    */
-  private cleanup(error?: Error): void {
+  private cleanup(error: Error): void {
     if (this.closed) {
       return;
     }
 
     this.socket.destroy();
-    this.controller.abort(error);
+    this.error = error;
+    this.dataEvents?.throw(error).then(undefined, () => null); // squash unhandled rejection
+    this.closed = true;
     this.emit(Connection.CLOSE);
   }
 
@@ -596,7 +573,7 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
   }
 
   private throwIfAborted() {
-    this.signal.throwIfAborted();
+    if (this.error) throw this.error;
   }
 
   /**
@@ -619,7 +596,8 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
 
     const buffer = Buffer.concat(await finalCommand.toBin());
 
-    return this.socketWrite(buffer);
+    if (this.socket.write(buffer)) return;
+    return once(this.socket, 'drain');
   }
 
   /**
@@ -632,13 +610,19 @@ export class Connection extends TypedEventEmitter<ConnectionEvents> {
    * Note that `for-await` loops call `return` automatically when the loop is exited.
    */
   private async *readMany(): AsyncGenerator<OpMsgResponse | OpQueryResponse> {
-    for await (const message of onData(this.messageStream, { signal: this.signal })) {
-      const response = await decompressResponse(message);
-      yield response;
+    try {
+      this.dataEvents = onData(this.messageStream);
+      for await (const message of this.dataEvents) {
+        const response = await decompressResponse(message);
+        yield response;
 
-      if (!response.moreToCome) {
-        return;
+        if (!response.moreToCome) {
+          return;
+        }
       }
+    } finally {
+      this.dataEvents = null;
+      this.throwIfAborted();
     }
   }
 }

Diff for: src/cmap/connection.ts

@@ -233,8 +233,7 @@ export class ConnectionPool extends TypedEventEmitter<ConnectionPoolEvents> {
       maxIdleTimeMS: options.maxIdleTimeMS ?? 0,
       waitQueueTimeoutMS: options.waitQueueTimeoutMS ?? 0,
       minPoolSizeCheckFrequencyMS: options.minPoolSizeCheckFrequencyMS ?? 100,
-      autoEncrypter: options.autoEncrypter,
-      metadata: options.metadata
+      autoEncrypter: options.autoEncrypter
     });
 
     if (this.options.minPoolSize > this.options.maxPoolSize) {

Diff for: src/cmap/connection_pool.ts

@@ -1,7 +1,8 @@
+import { promises as fs } from 'fs';
 import * as os from 'os';
 import * as process from 'process';
 
-import { BSON, Int32 } from '../../bson';
+import { BSON, type Document, Int32 } from '../../bson';
 import { MongoInvalidArgumentError } from '../../error';
 import type { MongoOptions } from '../../mongo_client';
 
@@ -71,13 +72,13 @@ export class LimitedSizeDocument {
     return true;
   }
 
-  toObject(): ClientMetadata {
+  toObject(): Document {
     return BSON.deserialize(BSON.serialize(this.document), {
       promoteLongs: false,
       promoteBuffers: false,
       promoteValues: false,
       useBigInt64: false
-    }) as ClientMetadata;
+    });
   }
 }
 
@@ -152,8 +153,57 @@ export function makeClientMetadata(options: MakeClientMetadataOptions): ClientMe
       }
     }
   }
+  return metadataDocument.toObject() as ClientMetadata;
+}
+
+let dockerPromise: Promise<boolean>;
+/** @internal */
+async function getContainerMetadata() {
+  const containerMetadata: Record<string, any> = {};
+  dockerPromise ??= fs.access('/.dockerenv').then(
+    () => true,
+    () => false
+  );
+  const isDocker = await dockerPromise;
+
+  const { KUBERNETES_SERVICE_HOST = '' } = process.env;
+  const isKubernetes = KUBERNETES_SERVICE_HOST.length > 0 ? true : false;
+
+  if (isDocker) containerMetadata.runtime = 'docker';
+  if (isKubernetes) containerMetadata.orchestrator = 'kubernetes';
+
+  return containerMetadata;
+}
+
+/**
+ * @internal
+ * Re-add each metadata value.
+ * Attempt to add new env container metadata, but keep old data if it does not fit.
+ */
+export async function addContainerMetadata(originalMetadata: ClientMetadata) {
+  const containerMetadata = await getContainerMetadata();
+  if (Object.keys(containerMetadata).length === 0) return originalMetadata;
+
+  const extendedMetadata = new LimitedSizeDocument(512);
+
+  const extendedEnvMetadata = { ...originalMetadata?.env, container: containerMetadata };
+
+  for (const [key, val] of Object.entries(originalMetadata)) {
+    if (key !== 'env') {
+      extendedMetadata.ifItFitsItSits(key, val);
+    } else {
+      if (!extendedMetadata.ifItFitsItSits('env', extendedEnvMetadata)) {
+        // add in old data if newer / extended metadata does not fit
+        extendedMetadata.ifItFitsItSits('env', val);
+      }
+    }
+  }
+
+  if (!('env' in originalMetadata)) {
+    extendedMetadata.ifItFitsItSits('env', extendedEnvMetadata);
+  }
 
-  return metadataDocument.toObject();
+  return extendedMetadata.toObject();
 }
 
 /**

Diff for: src/cmap/handshake/client_metadata.ts

@@ -16,11 +16,9 @@ type PendingPromises = Omit<
  * https://nodejs.org/api/events.html#eventsonemitter-eventname-options
  *
  * Returns an AsyncIterator that iterates each 'data' event emitted from emitter.
- * It will reject upon an error event or if the provided signal is aborted.
+ * It will reject upon an error event.
  */
-export function onData(emitter: EventEmitter, options: { signal: AbortSignal }) {
-  const signal = options.signal;
-
+export function onData(emitter: EventEmitter) {
   // Setup pending events and pending promise lists
   /**
    * When the caller has not yet called .next(), we store the
@@ -89,19 +87,8 @@ export function onData(emitter: EventEmitter, options: { signal: AbortSignal })
   emitter.on('data', eventHandler);
   emitter.on('error', errorHandler);
 
-  if (signal.aborted) {
-    // If the signal is aborted, set up the first .next() call to be a rejection
-    queueMicrotask(abortListener);
-  } else {
-    signal.addEventListener('abort', abortListener, { once: true });
-  }
-
   return iterator;
 
-  function abortListener() {
-    errorHandler(signal.reason);
-  }
-
   function eventHandler(value: Buffer) {
     const promise = unconsumedPromises.shift();
     if (promise != null) promise.resolve({ value, done: false });
@@ -119,7 +106,6 @@ export function onData(emitter: EventEmitter, options: { signal: AbortSignal })
     // Adding event handlers
     emitter.off('data', eventHandler);
     emitter.off('error', errorHandler);
-    signal.removeEventListener('abort', abortListener);
     finished = true;
     const doneResult = { value: undefined, done: finished } as const;