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[//]: # "This README.md file is auto-generated, all changes to this file will be lost."
[//]: # "To regenerate it, use `python -m synthtool`."
<img src="https://avatars2.githubusercontent.com/u/2810941?v=3&s=96" alt="Google Cloud Platform logo" title="Google Cloud Platform" align="right" height="96" width="96"/>
# [GCP Metadata: Node.js Client](https://github.com/googleapis/gcp-metadata)
[![release level](https://img.shields.io/badge/release%20level-stable-brightgreen.svg?style=flat)](https://cloud.google.com/terms/launch-stages)
[![npm version](https://img.shields.io/npm/v/gcp-metadata.svg)](https://www.npmjs.com/package/gcp-metadata)
Get the metadata from a Google Cloud Platform environment
A comprehensive list of changes in each version may be found in
[the CHANGELOG](https://github.com/googleapis/gcp-metadata/blob/main/CHANGELOG.md).
* [GCP Metadata Node.js Client API Reference][client-docs]
* [GCP Metadata Documentation][product-docs]
* [github.com/googleapis/gcp-metadata](https://github.com/googleapis/gcp-metadata)
Read more about the client libraries for Cloud APIs, including the older
Google APIs Client Libraries, in [Client Libraries Explained][explained].
[explained]: https://cloud.google.com/apis/docs/client-libraries-explained
**Table of contents:**
* [Quickstart](#quickstart)
* [Installing the client library](#installing-the-client-library)
* [Using the client library](#using-the-client-library)
* [Samples](#samples)
* [Versioning](#versioning)
* [Contributing](#contributing)
* [License](#license)
## Quickstart
### Installing the client library
```bash
npm install gcp-metadata
```
### Using the client library
```javascript
const gcpMetadata = require('gcp-metadata');
async function quickstart() {
// check to see if this code can access a metadata server
const isAvailable = await gcpMetadata.isAvailable();
console.log(`Is available: ${isAvailable}`);
// Instance and Project level metadata will only be available if
// running inside of a Google Cloud compute environment such as
// Cloud Functions, App Engine, Kubernetes Engine, or Compute Engine.
// To learn more about the differences between instance and project
// level metadata, see:
// https://cloud.google.com/compute/docs/storing-retrieving-metadata#project-instance-metadata
if (isAvailable) {
// grab all top level metadata from the service
const instanceMetadata = await gcpMetadata.instance();
console.log('Instance metadata:');
console.log(instanceMetadata);
// get all project level metadata
const projectMetadata = await gcpMetadata.project();
console.log('Project metadata:');
console.log(projectMetadata);
}
}
quickstart();
```
#### Check to see if the metadata server is available
```js
const isAvailable = await gcpMetadata.isAvailable();
```
#### Access all metadata
```js
const data = await gcpMetadata.instance();
console.log(data); // ... All metadata properties
```
#### Access specific properties
```js
const data = await gcpMetadata.instance('hostname');
console.log(data); // ...Instance hostname
const projectId = await gcpMetadata.project('project-id');
console.log(projectId); // ...Project ID of the running instance
```
#### Access nested properties with the relative path
```js
const data = await gcpMetadata.instance('service-accounts/default/email');
console.log(data); // ...Email address of the Compute identity service account
```
#### Access specific properties with query parameters
```js
const data = await gcpMetadata.instance({
property: 'tags',
params: { alt: 'text' }
});
console.log(data) // ...Tags as newline-delimited list
```
#### Access with custom headers
```js
await gcpMetadata.instance({
headers: { 'no-trace': '1' }
}); // ...Request is untraced
```
### Take care with large number valued properties
In some cases number valued properties returned by the Metadata Service may be
too large to be representable as JavaScript numbers. In such cases we return
those values as `BigNumber` objects (from the [bignumber.js](https://github.com/MikeMcl/bignumber.js) library). Numbers
that fit within the JavaScript number range will be returned as normal number
values.
```js
const id = await gcpMetadata.instance('id');
console.log(id) // ... BigNumber { s: 1, e: 18, c: [ 45200, 31799277581759 ] }
console.log(id.toString()) // ... 4520031799277581759
```
### Environment variables
* `GCE_METADATA_HOST`: provide an alternate host or IP to perform lookup against (useful, for example, you're connecting through a custom proxy server).
For example:
```
export GCE_METADATA_HOST='169.254.169.254'
```
* `DETECT_GCP_RETRIES`: number representing number of retries that should be attempted on metadata lookup.
* `DEBUG_AUTH`: emit debugging logs
* `METADATA_SERVER_DETECTION`: configure desired metadata server availability check behavior.
* `assume-present`: don't try to ping the metadata server, but assume it's present
* `none`: don't try to ping the metadata server, but don't try to use it either
* `bios-only`: treat the result of a BIOS probe as canonical (don't fall back to pinging)
* `ping-only`: skip the BIOS probe, and go straight to pinging
## Samples
Samples are in the [`samples/`](https://github.com/googleapis/gcp-metadata/tree/main/samples) directory. Each sample's `README.md` has instructions for running its sample.
| Sample | Source Code | Try it |
| --------------------------- | --------------------------------- | ------ |
| Quickstart | [source code](https://github.com/googleapis/gcp-metadata/blob/main/samples/quickstart.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/gcp-metadata&page=editor&open_in_editor=samples/quickstart.js,samples/README.md) |
The [GCP Metadata Node.js Client API Reference][client-docs] documentation
also contains samples.
## Supported Node.js Versions
Our client libraries follow the [Node.js release schedule](https://github.com/nodejs/release#release-schedule).
Libraries are compatible with all current _active_ and _maintenance_ versions of
Node.js.
If you are using an end-of-life version of Node.js, we recommend that you update
as soon as possible to an actively supported LTS version.
Google's client libraries support legacy versions of Node.js runtimes on a
best-efforts basis with the following warnings:
* Legacy versions are not tested in continuous integration.
* Some security patches and features cannot be backported.
* Dependencies cannot be kept up-to-date.
Client libraries targeting some end-of-life versions of Node.js are available, and
can be installed through npm [dist-tags](https://docs.npmjs.com/cli/dist-tag).
The dist-tags follow the naming convention `legacy-(version)`.
For example, `npm install gcp-metadata@legacy-8` installs client libraries
for versions compatible with Node.js 8.
## Versioning
This library follows [Semantic Versioning](http://semver.org/).
This library is considered to be **stable**. The code surface will not change in backwards-incompatible ways
unless absolutely necessary (e.g. because of critical security issues) or with
an extensive deprecation period. Issues and requests against **stable** libraries
are addressed with the highest priority.
More Information: [Google Cloud Platform Launch Stages][launch_stages]
[launch_stages]: https://cloud.google.com/terms/launch-stages
## Contributing
Contributions welcome! See the [Contributing Guide](https://github.com/googleapis/gcp-metadata/blob/main/CONTRIBUTING.md).
Please note that this `README.md`, the `samples/README.md`,
and a variety of configuration files in this repository (including `.nycrc` and `tsconfig.json`)
are generated from a central template. To edit one of these files, make an edit
to its templates in
[directory](https://github.com/googleapis/synthtool).
## License
Apache Version 2.0
See [LICENSE](https://github.com/googleapis/gcp-metadata/blob/main/LICENSE)
[client-docs]: https://cloud.google.com/nodejs/docs/reference/gcp-metadata/latest
[product-docs]: https://cloud.google.com/compute/docs/storing-retrieving-metadata
[shell_img]: https://gstatic.com/cloudssh/images/open-btn.png
[projects]: https://console.cloud.google.com/project
[billing]: https://support.google.com/cloud/answer/6293499#enable-billing
[auth]: https://cloud.google.com/docs/authentication/external/set-up-adc-local

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/**
* Copyright 2022 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Known paths unique to Google Compute Engine Linux instances
*/
export declare const GCE_LINUX_BIOS_PATHS: {
BIOS_DATE: string;
BIOS_VENDOR: string;
};
/**
* Determines if the process is running on a Google Cloud Serverless environment (Cloud Run or Cloud Functions instance).
*
* Uses the:
* - {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
* - {@link https://cloud.google.com/functions/docs/env-var Cloud Functions environment variables}.
*
* @returns {boolean} `true` if the process is running on GCP serverless, `false` otherwise.
*/
export declare function isGoogleCloudServerless(): boolean;
/**
* Determines if the process is running on a Linux Google Compute Engine instance.
*
* @returns {boolean} `true` if the process is running on Linux GCE, `false` otherwise.
*/
export declare function isGoogleComputeEngineLinux(): boolean;
/**
* Determines if the process is running on a Google Compute Engine instance with a known
* MAC address.
*
* @returns {boolean} `true` if the process is running on GCE (as determined by MAC address), `false` otherwise.
*/
export declare function isGoogleComputeEngineMACAddress(): boolean;
/**
* Determines if the process is running on a Google Compute Engine instance.
*
* @returns {boolean} `true` if the process is running on GCE, `false` otherwise.
*/
export declare function isGoogleComputeEngine(): boolean;
/**
* Determines if the process is running on Google Cloud Platform.
*
* @returns {boolean} `true` if the process is running on GCP, `false` otherwise.
*/
export declare function detectGCPResidency(): boolean;

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"use strict";
/**
* Copyright 2022 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.GCE_LINUX_BIOS_PATHS = void 0;
exports.isGoogleCloudServerless = isGoogleCloudServerless;
exports.isGoogleComputeEngineLinux = isGoogleComputeEngineLinux;
exports.isGoogleComputeEngineMACAddress = isGoogleComputeEngineMACAddress;
exports.isGoogleComputeEngine = isGoogleComputeEngine;
exports.detectGCPResidency = detectGCPResidency;
const fs_1 = require("fs");
const os_1 = require("os");
/**
* Known paths unique to Google Compute Engine Linux instances
*/
exports.GCE_LINUX_BIOS_PATHS = {
BIOS_DATE: '/sys/class/dmi/id/bios_date',
BIOS_VENDOR: '/sys/class/dmi/id/bios_vendor',
};
const GCE_MAC_ADDRESS_REGEX = /^42:01/;
/**
* Determines if the process is running on a Google Cloud Serverless environment (Cloud Run or Cloud Functions instance).
*
* Uses the:
* - {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
* - {@link https://cloud.google.com/functions/docs/env-var Cloud Functions environment variables}.
*
* @returns {boolean} `true` if the process is running on GCP serverless, `false` otherwise.
*/
function isGoogleCloudServerless() {
/**
* `CLOUD_RUN_JOB` is used for Cloud Run Jobs
* - See {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
*
* `FUNCTION_NAME` is used in older Cloud Functions environments:
* - See {@link https://cloud.google.com/functions/docs/env-var Python 3.7 and Go 1.11}.
*
* `K_SERVICE` is used in Cloud Run and newer Cloud Functions environments:
* - See {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
* - See {@link https://cloud.google.com/functions/docs/env-var Cloud Functions newer runtimes}.
*/
const isGFEnvironment = process.env.CLOUD_RUN_JOB ||
process.env.FUNCTION_NAME ||
process.env.K_SERVICE;
return !!isGFEnvironment;
}
/**
* Determines if the process is running on a Linux Google Compute Engine instance.
*
* @returns {boolean} `true` if the process is running on Linux GCE, `false` otherwise.
*/
function isGoogleComputeEngineLinux() {
if ((0, os_1.platform)() !== 'linux')
return false;
try {
// ensure this file exist
(0, fs_1.statSync)(exports.GCE_LINUX_BIOS_PATHS.BIOS_DATE);
// ensure this file exist and matches
const biosVendor = (0, fs_1.readFileSync)(exports.GCE_LINUX_BIOS_PATHS.BIOS_VENDOR, 'utf8');
return /Google/.test(biosVendor);
}
catch {
return false;
}
}
/**
* Determines if the process is running on a Google Compute Engine instance with a known
* MAC address.
*
* @returns {boolean} `true` if the process is running on GCE (as determined by MAC address), `false` otherwise.
*/
function isGoogleComputeEngineMACAddress() {
const interfaces = (0, os_1.networkInterfaces)();
for (const item of Object.values(interfaces)) {
if (!item)
continue;
for (const { mac } of item) {
if (GCE_MAC_ADDRESS_REGEX.test(mac)) {
return true;
}
}
}
return false;
}
/**
* Determines if the process is running on a Google Compute Engine instance.
*
* @returns {boolean} `true` if the process is running on GCE, `false` otherwise.
*/
function isGoogleComputeEngine() {
return isGoogleComputeEngineLinux() || isGoogleComputeEngineMACAddress();
}
/**
* Determines if the process is running on Google Cloud Platform.
*
* @returns {boolean} `true` if the process is running on GCP, `false` otherwise.
*/
function detectGCPResidency() {
return isGoogleCloudServerless() || isGoogleComputeEngine();
}
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export declare const BASE_PATH = "/computeMetadata/v1";
export declare const HOST_ADDRESS = "http://169.254.169.254";
export declare const SECONDARY_HOST_ADDRESS = "http://metadata.google.internal.";
export declare const HEADER_NAME = "Metadata-Flavor";
export declare const HEADER_VALUE = "Google";
export declare const HEADERS: Readonly<{
"Metadata-Flavor": "Google";
}>;
/**
* Metadata server detection override options.
*
* Available via `process.env.METADATA_SERVER_DETECTION`.
*/
export declare const METADATA_SERVER_DETECTION: Readonly<{
'assume-present': "don't try to ping the metadata server, but assume it's present";
none: "don't try to ping the metadata server, but don't try to use it either";
'bios-only': "treat the result of a BIOS probe as canonical (don't fall back to pinging)";
'ping-only': "skip the BIOS probe, and go straight to pinging";
}>;
type HeadersInit = ConstructorParameters<typeof Headers>[0];
export interface Options {
params?: {
[index: string]: string;
};
property?: string;
headers?: HeadersInit;
}
export interface MetadataAccessor {
/**
*
* @example
*
* // equivalent to `project('project-id')`;
* const metadataKey = 'project/project-id';
*/
metadataKey: string;
params?: Options['params'];
headers?: Options['headers'];
noResponseRetries?: number;
fastFail?: boolean;
}
export type BulkResults<T extends readonly MetadataAccessor[]> = {
[key in T[number]['metadataKey']]: ReturnType<JSON['parse']>;
};
/**
* Obtain metadata for the current GCE instance.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const serviceAccount: {} = await instance('service-accounts/');
* const serviceAccountEmail: string = await instance('service-accounts/default/email');
* ```
*/
export declare function instance<T = any>(options?: string | Options): Promise<T>;
/**
* Obtain metadata for the current GCP project.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const projectId: string = await project('project-id');
* const numericProjectId: number = await project('numeric-project-id');
* ```
*/
export declare function project<T = any>(options?: string | Options): Promise<T>;
/**
* Obtain metadata for the current universe.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const universeDomain: string = await universe('universe-domain');
* ```
*/
export declare function universe<T>(options?: string | Options): Promise<T>;
/**
* Retrieve metadata items in parallel.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const data = await bulk([
* {
* metadataKey: 'instance',
* },
* {
* metadataKey: 'project/project-id',
* },
* ] as const);
*
* // data.instance;
* // data['project/project-id'];
* ```
*
* @param properties The metadata properties to retrieve
* @returns The metadata in `metadatakey:value` format
*/
export declare function bulk<T extends readonly Readonly<MetadataAccessor>[], R extends BulkResults<T> = BulkResults<T>>(properties: T): Promise<R>;
/**
* Determine if the metadata server is currently available.
*/
export declare function isAvailable(): Promise<boolean>;
/**
* reset the memoized isAvailable() lookup.
*/
export declare function resetIsAvailableCache(): void;
/**
* A cache for the detected GCP Residency.
*/
export declare let gcpResidencyCache: boolean | null;
/**
* Detects GCP Residency.
* Caches results to reduce costs for subsequent calls.
*
* @see setGCPResidency for setting
*/
export declare function getGCPResidency(): boolean;
/**
* Sets the detected GCP Residency.
* Useful for forcing metadata server detection behavior.
*
* Set `null` to autodetect the environment (default behavior).
* @see getGCPResidency for getting
*/
export declare function setGCPResidency(value?: boolean | null): void;
/**
* Obtain the timeout for requests to the metadata server.
*
* In certain environments and conditions requests can take longer than
* the default timeout to complete. This function will determine the
* appropriate timeout based on the environment.
*
* @returns {number} a request timeout duration in milliseconds.
*/
export declare function requestTimeout(): number;
export * from './gcp-residency';

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"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __exportStar = (this && this.__exportStar) || function(m, exports) {
for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.gcpResidencyCache = exports.METADATA_SERVER_DETECTION = exports.HEADERS = exports.HEADER_VALUE = exports.HEADER_NAME = exports.SECONDARY_HOST_ADDRESS = exports.HOST_ADDRESS = exports.BASE_PATH = void 0;
exports.instance = instance;
exports.project = project;
exports.universe = universe;
exports.bulk = bulk;
exports.isAvailable = isAvailable;
exports.resetIsAvailableCache = resetIsAvailableCache;
exports.getGCPResidency = getGCPResidency;
exports.setGCPResidency = setGCPResidency;
exports.requestTimeout = requestTimeout;
/**
* Copyright 2018 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const gaxios_1 = require("gaxios");
const jsonBigint = require("json-bigint");
const gcp_residency_1 = require("./gcp-residency");
const logger = __importStar(require("google-logging-utils"));
exports.BASE_PATH = '/computeMetadata/v1';
exports.HOST_ADDRESS = 'http://169.254.169.254';
exports.SECONDARY_HOST_ADDRESS = 'http://metadata.google.internal.';
exports.HEADER_NAME = 'Metadata-Flavor';
exports.HEADER_VALUE = 'Google';
exports.HEADERS = Object.freeze({ [exports.HEADER_NAME]: exports.HEADER_VALUE });
const log = logger.log('gcp-metadata');
/**
* Metadata server detection override options.
*
* Available via `process.env.METADATA_SERVER_DETECTION`.
*/
exports.METADATA_SERVER_DETECTION = Object.freeze({
'assume-present': "don't try to ping the metadata server, but assume it's present",
none: "don't try to ping the metadata server, but don't try to use it either",
'bios-only': "treat the result of a BIOS probe as canonical (don't fall back to pinging)",
'ping-only': 'skip the BIOS probe, and go straight to pinging',
});
/**
* Returns the base URL while taking into account the GCE_METADATA_HOST
* environment variable if it exists.
*
* @returns The base URL, e.g., http://169.254.169.254/computeMetadata/v1.
*/
function getBaseUrl(baseUrl) {
if (!baseUrl) {
baseUrl =
process.env.GCE_METADATA_IP ||
process.env.GCE_METADATA_HOST ||
exports.HOST_ADDRESS;
}
// If no scheme is provided default to HTTP:
if (!/^https?:\/\//.test(baseUrl)) {
baseUrl = `http://${baseUrl}`;
}
return new URL(exports.BASE_PATH, baseUrl).href;
}
// Accepts an options object passed from the user to the API. In previous
// versions of the API, it referred to a `Request` or an `Axios` request
// options object. Now it refers to an object with very limited property
// names. This is here to help ensure users don't pass invalid options when
// they upgrade from 0.4 to 0.5 to 0.8.
function validate(options) {
Object.keys(options).forEach(key => {
switch (key) {
case 'params':
case 'property':
case 'headers':
break;
case 'qs':
throw new Error("'qs' is not a valid configuration option. Please use 'params' instead.");
default:
throw new Error(`'${key}' is not a valid configuration option.`);
}
});
}
async function metadataAccessor(type, options = {}, noResponseRetries = 3, fastFail = false) {
const headers = new Headers(exports.HEADERS);
let metadataKey = '';
let params = {};
if (typeof type === 'object') {
const metadataAccessor = type;
new Headers(metadataAccessor.headers).forEach((value, key) => headers.set(key, value));
metadataKey = metadataAccessor.metadataKey;
params = metadataAccessor.params || params;
noResponseRetries = metadataAccessor.noResponseRetries || noResponseRetries;
fastFail = metadataAccessor.fastFail || fastFail;
}
else {
metadataKey = type;
}
if (typeof options === 'string') {
metadataKey += `/${options}`;
}
else {
validate(options);
if (options.property) {
metadataKey += `/${options.property}`;
}
new Headers(options.headers).forEach((value, key) => headers.set(key, value));
params = options.params || params;
}
const requestMethod = fastFail ? fastFailMetadataRequest : gaxios_1.request;
const req = {
url: `${getBaseUrl()}/${metadataKey}`,
headers,
retryConfig: { noResponseRetries },
params,
responseType: 'text',
timeout: requestTimeout(),
};
log.info('instance request %j', req);
const res = await requestMethod(req);
log.info('instance metadata is %s', res.data);
const metadataFlavor = res.headers.get(exports.HEADER_NAME);
if (metadataFlavor !== exports.HEADER_VALUE) {
throw new RangeError(`Invalid response from metadata service: incorrect ${exports.HEADER_NAME} header. Expected '${exports.HEADER_VALUE}', got ${metadataFlavor ? `'${metadataFlavor}'` : 'no header'}`);
}
if (typeof res.data === 'string') {
try {
return jsonBigint.parse(res.data);
}
catch {
/* ignore */
}
}
return res.data;
}
async function fastFailMetadataRequest(options) {
const secondaryOptions = {
...options,
url: options.url
?.toString()
.replace(getBaseUrl(), getBaseUrl(exports.SECONDARY_HOST_ADDRESS)),
};
// We race a connection between DNS/IP to metadata server. There are a couple
// reasons for this:
//
// 1. the DNS is slow in some GCP environments; by checking both, we might
// detect the runtime environment significantly faster.
// 2. we can't just check the IP, which is tarpitted and slow to respond
// on a user's local machine.
//
// Returns first resolved promise or if all promises get rejected we return an AggregateError.
//
// Note, however, if a failure happens prior to a success, a rejection should
// occur, this is for folks running locally.
//
const r1 = (0, gaxios_1.request)(options);
const r2 = (0, gaxios_1.request)(secondaryOptions);
return Promise.any([r1, r2]);
}
/**
* Obtain metadata for the current GCE instance.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const serviceAccount: {} = await instance('service-accounts/');
* const serviceAccountEmail: string = await instance('service-accounts/default/email');
* ```
*/
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function instance(options) {
return metadataAccessor('instance', options);
}
/**
* Obtain metadata for the current GCP project.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const projectId: string = await project('project-id');
* const numericProjectId: number = await project('numeric-project-id');
* ```
*/
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function project(options) {
return metadataAccessor('project', options);
}
/**
* Obtain metadata for the current universe.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const universeDomain: string = await universe('universe-domain');
* ```
*/
function universe(options) {
return metadataAccessor('universe', options);
}
/**
* Retrieve metadata items in parallel.
*
* @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
*
* @example
* ```
* const data = await bulk([
* {
* metadataKey: 'instance',
* },
* {
* metadataKey: 'project/project-id',
* },
* ] as const);
*
* // data.instance;
* // data['project/project-id'];
* ```
*
* @param properties The metadata properties to retrieve
* @returns The metadata in `metadatakey:value` format
*/
async function bulk(properties) {
const r = {};
await Promise.all(properties.map(item => {
return (async () => {
const res = await metadataAccessor(item);
const key = item.metadataKey;
r[key] = res;
})();
}));
return r;
}
/*
* How many times should we retry detecting GCP environment.
*/
function detectGCPAvailableRetries() {
return process.env.DETECT_GCP_RETRIES
? Number(process.env.DETECT_GCP_RETRIES)
: 0;
}
let cachedIsAvailableResponse;
/**
* Determine if the metadata server is currently available.
*/
async function isAvailable() {
if (process.env.METADATA_SERVER_DETECTION) {
const value = process.env.METADATA_SERVER_DETECTION.trim().toLocaleLowerCase();
if (!(value in exports.METADATA_SERVER_DETECTION)) {
throw new RangeError(`Unknown \`METADATA_SERVER_DETECTION\` env variable. Got \`${value}\`, but it should be \`${Object.keys(exports.METADATA_SERVER_DETECTION).join('`, `')}\`, or unset`);
}
switch (value) {
case 'assume-present':
return true;
case 'none':
return false;
case 'bios-only':
return getGCPResidency();
case 'ping-only':
// continue, we want to ping the server
}
}
try {
// If a user is instantiating several GCP libraries at the same time,
// this may result in multiple calls to isAvailable(), to detect the
// runtime environment. We use the same promise for each of these calls
// to reduce the network load.
if (cachedIsAvailableResponse === undefined) {
cachedIsAvailableResponse = metadataAccessor('instance', undefined, detectGCPAvailableRetries(),
// If the default HOST_ADDRESS has been overridden, we should not
// make an effort to try SECONDARY_HOST_ADDRESS (as we are likely in
// a non-GCP environment):
!(process.env.GCE_METADATA_IP || process.env.GCE_METADATA_HOST));
}
await cachedIsAvailableResponse;
return true;
}
catch (e) {
const err = e;
if (process.env.DEBUG_AUTH) {
console.info(err);
}
if (err.type === 'request-timeout') {
// If running in a GCP environment, metadata endpoint should return
// within ms.
return false;
}
if (err.response && err.response.status === 404) {
return false;
}
else {
if (!(err.response && err.response.status === 404) &&
// A warning is emitted if we see an unexpected err.code, or err.code
// is not populated:
(!err.code ||
![
'EHOSTDOWN',
'EHOSTUNREACH',
'ENETUNREACH',
'ENOENT',
'ENOTFOUND',
'ECONNREFUSED',
].includes(err.code.toString()))) {
let code = 'UNKNOWN';
if (err.code)
code = err.code.toString();
process.emitWarning(`received unexpected error = ${err.message} code = ${code}`, 'MetadataLookupWarning');
}
// Failure to resolve the metadata service means that it is not available.
return false;
}
}
}
/**
* reset the memoized isAvailable() lookup.
*/
function resetIsAvailableCache() {
cachedIsAvailableResponse = undefined;
}
/**
* A cache for the detected GCP Residency.
*/
exports.gcpResidencyCache = null;
/**
* Detects GCP Residency.
* Caches results to reduce costs for subsequent calls.
*
* @see setGCPResidency for setting
*/
function getGCPResidency() {
if (exports.gcpResidencyCache === null) {
setGCPResidency();
}
return exports.gcpResidencyCache;
}
/**
* Sets the detected GCP Residency.
* Useful for forcing metadata server detection behavior.
*
* Set `null` to autodetect the environment (default behavior).
* @see getGCPResidency for getting
*/
function setGCPResidency(value = null) {
exports.gcpResidencyCache = value !== null ? value : (0, gcp_residency_1.detectGCPResidency)();
}
/**
* Obtain the timeout for requests to the metadata server.
*
* In certain environments and conditions requests can take longer than
* the default timeout to complete. This function will determine the
* appropriate timeout based on the environment.
*
* @returns {number} a request timeout duration in milliseconds.
*/
function requestTimeout() {
return getGCPResidency() ? 0 : 3000;
}
__exportStar(require("./gcp-residency"), exports);
//# sourceMappingURL=index.js.map

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77
node_modules/gcp-metadata/package.json generated vendored Normal file
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{
"name": "gcp-metadata",
"version": "8.1.2",
"description": "Get the metadata from a Google Cloud Platform environment",
"repository": {
"type": "git",
"directory": "packages/gcp-metadata",
"url": "https://github.com/googleapis/google-cloud-node-core.git"
},
"main": "./build/src/index.js",
"types": "./build/src/index.d.ts",
"type": "commonjs",
"files": [
"build/src"
],
"scripts": {
"compile": "cross-env NODE_OPTIONS=--max-old-space-size=8192 tsc -p .",
"fix": "gts fix",
"pretest": "npm run compile",
"prepare": "npm run compile",
"samples-test": "npm link && cd samples/ && npm link ../ && npm test && cd ../",
"presystem-test": "npm run compile",
"system-test": "mocha build/system-test --timeout 600000",
"test": "c8 mocha --timeout=5000 build/test",
"docs": "jsdoc -c .jsdoc.js",
"lint": "gts check",
"docs-test": "linkinator docs",
"predocs-test": "npm run docs",
"prelint": "cd samples; npm link ../; npm install",
"clean": "gts clean",
"precompile": "gts clean"
},
"keywords": [
"google cloud platform",
"google cloud",
"google",
"app engine",
"compute engine",
"metadata server",
"metadata"
],
"author": "Google LLC",
"license": "Apache-2.0",
"dependencies": {
"gaxios": "^7.0.0",
"google-logging-utils": "^1.0.0",
"json-bigint": "^1.0.0"
},
"devDependencies": {
"@google-cloud/functions": "^4.0.0",
"@types/json-bigint": "^1.0.4",
"@types/mocha": "^10.0.9",
"@types/ncp": "^2.0.8",
"@types/node": "^22.9.0",
"@types/sinon": "^17.0.3",
"@types/tmp": "^0.2.6",
"c8": "^10.1.2",
"cross-env": "^7.0.3",
"gcbuild": "^1.3.39",
"gcx": "^2.0.27",
"gts": "^6.0.2",
"jsdoc": "^4.0.4",
"jsdoc-fresh": "^5.0.0",
"jsdoc-region-tag": "^4.0.0",
"linkinator": "^6.1.2",
"mocha": "^11.1.0",
"ncp": "^2.0.0",
"nock": "^14.0.1",
"sinon": "^21.0.0",
"tmp": "^0.2.3",
"typescript": "^5.6.3"
},
"engines": {
"node": ">=18"
},
"homepage": "https://github.com/googleapis/google-cloud-node-core/tree/main/packages/gcp-metadata"
}