React

server/node_modules/mongodb/src/cmap/handshake/client_metadata.ts

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+import * as os from 'os';
+import * as process from 'process';
+
+import { BSON, type Document, Int32, NumberUtils } from '../../bson';
+import { MongoInvalidArgumentError } from '../../error';
+import type { DriverInfo, MongoOptions } from '../../mongo_client';
+import { fileIsAccessible } from '../../utils';
+
+// eslint-disable-next-line @typescript-eslint/no-require-imports
+const NODE_DRIVER_VERSION = require('../../../package.json').version;
+
+/** @internal */
+export function isDriverInfoEqual(info1: DriverInfo, info2: DriverInfo): boolean {
+  /** for equality comparison, we consider "" as unset */
+  const nonEmptyCmp = (s1: string | undefined, s2: string | undefined): boolean => {
+    s1 ||= undefined;
+    s2 ||= undefined;
+
+    return s1 === s2;
+  };
+
+  return (
+    nonEmptyCmp(info1.name, info2.name) &&
+    nonEmptyCmp(info1.platform, info2.platform) &&
+    nonEmptyCmp(info1.version, info2.version)
+  );
+}
+
+/**
+ * @internal
+ * @see https://github.com/mongodb/specifications/blob/master/source/mongodb-handshake/handshake.md#hello-command
+ */
+export interface ClientMetadata {
+  driver: {
+    name: string;
+    version: string;
+  };
+  os: {
+    type: string;
+    name?: NodeJS.Platform;
+    architecture?: string;
+    version?: string;
+  };
+  platform: string;
+  application?: {
+    name: string;
+  };
+  /** FaaS environment information */
+  env?: {
+    name?: 'aws.lambda' | 'gcp.func' | 'azure.func' | 'vercel';
+    timeout_sec?: Int32;
+    memory_mb?: Int32;
+    region?: string;
+    container?: {
+      runtime?: string;
+      orchestrator?: string;
+    };
+  };
+}
+
+/** @internal */
+export class LimitedSizeDocument {
+  private document = new Map();
+  /** BSON overhead: Int32 + Null byte */
+  private documentSize = 5;
+  private maxSize: number;
+
+  constructor(maxSize: number) {
+    this.maxSize = maxSize;
+  }
+
+  /** Only adds key/value if the bsonByteLength is less than MAX_SIZE */
+  public ifItFitsItSits(key: string, value: Record<string, any> | string): boolean {
+    // The BSON byteLength of the new element is the same as serializing it to its own document
+    // subtracting the document size int32 and the null terminator.
+    const newElementSize = BSON.serialize(new Map().set(key, value)).byteLength - 5;
+
+    if (newElementSize + this.documentSize > this.maxSize) {
+      return false;
+    }
+
+    this.documentSize += newElementSize;
+
+    this.document.set(key, value);
+
+    return true;
+  }
+
+  toObject(): Document {
+    return BSON.deserialize(BSON.serialize(this.document), {
+      promoteLongs: false,
+      promoteBuffers: false,
+      promoteValues: false,
+      useBigInt64: false
+    });
+  }
+}
+
+type MakeClientMetadataOptions = Pick<MongoOptions, 'appName'>;
+/**
+ * From the specs:
+ * Implementors SHOULD cumulatively update fields in the following order until the document is under the size limit:
+ * 1. Omit fields from `env` except `env.name`.
+ * 2. Omit fields from `os` except `os.type`.
+ * 3. Omit the `env` document entirely.
+ * 4. Truncate `platform`. -- special we do not truncate this field
+ */
+export async function makeClientMetadata(
+  driverInfoList: DriverInfo[],
+  { appName = '' }: MakeClientMetadataOptions
+): Promise<ClientMetadata> {
+  const metadataDocument = new LimitedSizeDocument(512);
+
+  // Add app name first, it must be sent
+  if (appName.length > 0) {
+    const name =
+      Buffer.byteLength(appName, 'utf8') <= 128
+        ? appName
+        : Buffer.from(appName, 'utf8').subarray(0, 128).toString('utf8');
+    metadataDocument.ifItFitsItSits('application', { name });
+  }
+
+  const driverInfo = {
+    name: 'nodejs',
+    version: NODE_DRIVER_VERSION
+  };
+
+  // This is where we handle additional driver info added after client construction.
+  for (const { name: n = '', version: v = '' } of driverInfoList) {
+    if (n.length > 0) {
+      driverInfo.name = `${driverInfo.name}|${n}`;
+    }
+    if (v.length > 0) {
+      driverInfo.version = `${driverInfo.version}|${v}`;
+    }
+  }
+
+  if (!metadataDocument.ifItFitsItSits('driver', driverInfo)) {
+    throw new MongoInvalidArgumentError(
+      'Unable to include driverInfo name and version, metadata cannot exceed 512 bytes'
+    );
+  }
+
+  let runtimeInfo = getRuntimeInfo();
+  // This is where we handle additional driver info added after client construction.
+  for (const { platform = '' } of driverInfoList) {
+    if (platform.length > 0) {
+      runtimeInfo = `${runtimeInfo}|${platform}`;
+    }
+  }
+
+  if (!metadataDocument.ifItFitsItSits('platform', runtimeInfo)) {
+    throw new MongoInvalidArgumentError(
+      'Unable to include driverInfo platform, metadata cannot exceed 512 bytes'
+    );
+  }
+
+  // Note: order matters, os.type is last so it will be removed last if we're at maxSize
+  const osInfo = new Map()
+    .set('name', os.platform())
+    .set('architecture', os.arch())
+    .set('version', os.release())
+    .set('type', os.type());
+
+  if (!metadataDocument.ifItFitsItSits('os', osInfo)) {
+    for (const key of osInfo.keys()) {
+      osInfo.delete(key);
+      if (osInfo.size === 0) break;
+      if (metadataDocument.ifItFitsItSits('os', osInfo)) break;
+    }
+  }
+
+  const faasEnv = getFAASEnv();
+  if (faasEnv != null) {
+    if (!metadataDocument.ifItFitsItSits('env', faasEnv)) {
+      for (const key of faasEnv.keys()) {
+        faasEnv.delete(key);
+        if (faasEnv.size === 0) break;
+        if (metadataDocument.ifItFitsItSits('env', faasEnv)) break;
+      }
+    }
+  }
+  return await addContainerMetadata(metadataDocument.toObject() as ClientMetadata);
+}
+
+let dockerPromise: Promise<boolean>;
+type ContainerMetadata = NonNullable<NonNullable<ClientMetadata['env']>['container']>;
+/** @internal */
+async function getContainerMetadata(): Promise<ContainerMetadata> {
+  dockerPromise ??= fileIsAccessible('/.dockerenv');
+  const isDocker = await dockerPromise;
+
+  const { KUBERNETES_SERVICE_HOST = '' } = process.env;
+  const isKubernetes = KUBERNETES_SERVICE_HOST.length > 0 ? true : false;
+
+  const containerMetadata: ContainerMetadata = {};
+
+  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.
+ */
+async function addContainerMetadata(originalMetadata: ClientMetadata): Promise<ClientMetadata> {
+  const containerMetadata = await getContainerMetadata();
+  if (Object.keys(containerMetadata).length === 0) return originalMetadata;
+
+  const extendedMetadata = new LimitedSizeDocument(512);
+
+  const extendedEnvMetadata: NonNullable<ClientMetadata['env']> = {
+    ...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 extendedMetadata.toObject() as ClientMetadata;
+}
+
+/**
+ * Collects FaaS metadata.
+ * - `name` MUST be the last key in the Map returned.
+ */
+export function getFAASEnv(): Map<string, string | Int32> | null {
+  const {
+    AWS_EXECUTION_ENV = '',
+    AWS_LAMBDA_RUNTIME_API = '',
+    FUNCTIONS_WORKER_RUNTIME = '',
+    K_SERVICE = '',
+    FUNCTION_NAME = '',
+    VERCEL = '',
+    AWS_LAMBDA_FUNCTION_MEMORY_SIZE = '',
+    AWS_REGION = '',
+    FUNCTION_MEMORY_MB = '',
+    FUNCTION_REGION = '',
+    FUNCTION_TIMEOUT_SEC = '',
+    VERCEL_REGION = ''
+  } = process.env;
+
+  const isAWSFaaS =
+    AWS_EXECUTION_ENV.startsWith('AWS_Lambda_') || AWS_LAMBDA_RUNTIME_API.length > 0;
+  const isAzureFaaS = FUNCTIONS_WORKER_RUNTIME.length > 0;
+  const isGCPFaaS = K_SERVICE.length > 0 || FUNCTION_NAME.length > 0;
+  const isVercelFaaS = VERCEL.length > 0;
+
+  // Note: order matters, name must always be the last key
+  const faasEnv = new Map();
+
+  // When isVercelFaaS is true so is isAWSFaaS; Vercel inherits the AWS env
+  if (isVercelFaaS && !(isAzureFaaS || isGCPFaaS)) {
+    if (VERCEL_REGION.length > 0) {
+      faasEnv.set('region', VERCEL_REGION);
+    }
+
+    faasEnv.set('name', 'vercel');
+    return faasEnv;
+  }
+
+  if (isAWSFaaS && !(isAzureFaaS || isGCPFaaS || isVercelFaaS)) {
+    if (AWS_REGION.length > 0) {
+      faasEnv.set('region', AWS_REGION);
+    }
+
+    if (
+      AWS_LAMBDA_FUNCTION_MEMORY_SIZE.length > 0 &&
+      Number.isInteger(+AWS_LAMBDA_FUNCTION_MEMORY_SIZE)
+    ) {
+      faasEnv.set('memory_mb', new Int32(AWS_LAMBDA_FUNCTION_MEMORY_SIZE));
+    }
+
+    faasEnv.set('name', 'aws.lambda');
+    return faasEnv;
+  }
+
+  if (isAzureFaaS && !(isGCPFaaS || isAWSFaaS || isVercelFaaS)) {
+    faasEnv.set('name', 'azure.func');
+    return faasEnv;
+  }
+
+  if (isGCPFaaS && !(isAzureFaaS || isAWSFaaS || isVercelFaaS)) {
+    if (FUNCTION_REGION.length > 0) {
+      faasEnv.set('region', FUNCTION_REGION);
+    }
+
+    if (FUNCTION_MEMORY_MB.length > 0 && Number.isInteger(+FUNCTION_MEMORY_MB)) {
+      faasEnv.set('memory_mb', new Int32(FUNCTION_MEMORY_MB));
+    }
+
+    if (FUNCTION_TIMEOUT_SEC.length > 0 && Number.isInteger(+FUNCTION_TIMEOUT_SEC)) {
+      faasEnv.set('timeout_sec', new Int32(FUNCTION_TIMEOUT_SEC));
+    }
+
+    faasEnv.set('name', 'gcp.func');
+    return faasEnv;
+  }
+
+  return null;
+}
+
+/**
+ * @internal
+ * This type represents the global Deno object and the minimal type contract we expect it to satisfy.
+ */
+declare const Deno: { version?: { deno?: string } } | undefined;
+
+/**
+ * @internal
+ * This type represents the global Bun object and the minimal type contract we expect it to satisfy.
+ */
+declare const Bun: { (): void; version?: string } | undefined;
+
+/**
+ * @internal
+ * Get current JavaScript runtime platform
+ *
+ * NOTE: The version information fetching is intentionally written defensively
+ * to avoid having a released driver version that becomes incompatible
+ * with a future change to these global objects.
+ */
+function getRuntimeInfo(): string {
+  const endianness = NumberUtils.isBigEndian ? 'BE' : 'LE';
+  if ('Deno' in globalThis) {
+    const version = typeof Deno?.version?.deno === 'string' ? Deno?.version?.deno : '0.0.0-unknown';
+
+    return `Deno v${version}, ${endianness}`;
+  }
+
+  if ('Bun' in globalThis) {
+    const version = typeof Bun?.version === 'string' ? Bun?.version : '0.0.0-unknown';
+
+    return `Bun v${version}, ${endianness}`;
+  }
+
+  return `Node.js ${process.version}, ${endianness}`;
+}