Amazon Location Utilities - Authentication Helper for JavaScript

These are utilities to help customers authenticate when making Amazon Location Service API calls from their JavaScript applications. This specifically helps when using API keys or Amazon Cognito as the authentication method.

Installation

Install this library from NPM for usage with modules:

npm install @aws/amazon-location-utilities-auth-helper

Importing in an HTML file for usage directly in the browser.

<script src="https://cdn.jsdelivr.net/npm/@aws/amazon-location-utilities-auth-helper@1"></script>

Usage

Import the library and call the utility functions in the top-level namespace as needed. This library is used to authenticate requests from the standalone Maps, Places, and Routes SDKs, the Location SDK, and when rendering maps with MapLibre GL JS.

You can find more details about these functions in the Documentation section.

Usage with modules

These examples showcase importing our libraries in modules, and then using a bundler to combine your module(s) into a script that can be run in the browser or other environments.

This example uses the standalone Places SDK to make a request that authenticates using API keys.

npm install @aws-sdk/geo-places-client

// Import from the AWS JavaScript SDK V3 (GeoPlacesClient)
import { GeoPlacesClient, GeocodeCommand } from "@aws-sdk/geo-places-client";
// Import the utility functions
import { withAPIKey } from "@aws/amazon-location-utilities-auth-helper";

// Create an authentication helper instance using an API key and region
const authHelper = withAPIKey("<API Key>", "<Region>");

// Configures the client to use API keys when making supported requests
const client = new GeoPlacesClient(authHelper.getClientConfig());

const input = { ... };
const command = new GeocodeCommand(input);
const response = await client.send(command);

This example uses the standalone Routes SDK to make a request that authenticates using API keys.

npm install @aws-sdk/geo-routes-client

// Import from the AWS JavaScript SDK V3 (GeoRoutesClient)
import { GeoRoutesClient, CalculateRoutesCommand } from "@aws-sdk/geo-routes-client";
// Import the utility functions
import { withAPIKey } from "@aws/amazon-location-utilities-auth-helper";

// Create an authentication helper instance using an API key and region
const authHelper = withAPIKey("<API Key>", "<Region>");

// Configures the client to use API keys when making supported requests
const client = new GeoRoutesClient(authHelper.getClientConfig());

const input = { ... };
const command = new CalculateRoutesCommand(input);
const response = await client.send(command);

This example uses the Location SDK to make a request that authenticates using API keys.

npm install @aws-sdk/client-location

// Import from the AWS JavaScript SDK V3 (LocationClient)
import { LocationClient, ListGeofencesCommand } from "@aws-sdk/client-location";
// Import the utility functions
import { withAPIKey } from "@aws/amazon-location-utilities-auth-helper";

// Create an authentication helper instance using an API key and region
const authHelper = withAPIKey("<API Key>", "<Region>");

// Configures the client to use API keys when making supported requests
const client = new LocationClient(authHelper.getClientConfig());

const input = { ... };
const command = new ListGeofencesCommand(input);
const response = await client.send(command);

This example uses the standalone Routes SDK to make a request that that authenticates using Amazon Cognito.

npm install @aws-sdk/geo-routes-client

// Import from the AWS JavaScript SDK V3 (GeoRoutesClient)
import { GeoRoutesClient, CalculateRoutesCommand } from "@aws-sdk/geo-routes-client";
// Import the utility functions
import { withIdentityPoolId } from "@aws/amazon-location-utilities-auth-helper";

// Create an authentication helper instance using credentials from Cognito
const authHelper = await withIdentityPoolId("<Identity Pool ID>");

// Configures the client to use credentials obtained via Amazon Cognito
const client = new GeoRoutesClient(authHelper.getClientConfig());

const input = { ... };
const command = new CalculateRoutesCommand(input);
const response = await client.send(command);

This example uses MapLibre GL JS to render a map that authenticates resource requests using an API key.

The authentication helper is not needed when using MapLibre to render a map using API keys, because the style descriptor URL and API key can be passed into the style endpoint directly.

// Import MapLibre GL JS
import maplibregl from "maplibre-gl";

const apiKey = "<API Key>";
const region = "<Region>"; // Region containing Amazon Location resource
const styleName = "Standard"; // Standard, Monochrome, Hybrid, or Satellite

// Render the map
const map = new maplibregl.Map({
  container: "map",
  center: [-123.115898, 49.295868],
  zoom: 10,
  style: `https://maps.geo.${region}.amazonaws.com/v2/styles/${styleName}/descriptor?key=${apiKey}`,
});

This example uses MapLibre GL JS to render a map that authenticates resource requests using Amazon Cognito.

// Import MapLibre GL JS
import maplibregl from "maplibre-gl";
// Import the utility function
import { withIdentityPoolId } from "@aws/amazon-location-utilities-auth-helper";

const identityPoolId = "<Identity Pool ID>";
const region = "<Region>"; // Region containing Amazon Location resource
const styleName = "Standard"; // Standard, Monochrome, Hybrid, or Satellite

// Create an authentication helper instance using credentials from Cognito
const authHelper = await withIdentityPoolId(identityPoolId);

// Render the map
const map = new maplibregl.Map({
  container: "map",
  center: [-123.115898, 49.295868],
  zoom: 10,
  style: `https://maps.geo.${region}.amazonaws.com/v2/styles/${styleName}/descriptor`,
  ...authHelper.getMapAuthenticationOptions(),
});

Usage with a browser

Utility functions are available under the amazonLocationAuthHelper global.

Some of these example use the Amazon Location Client. The Amazon Location Client is based on the AWS SDK for JavaScript V3 and allows for making calls to Amazon Location through a script referenced in an HTML file.

This example uses the Amazon Location Client to make a request that that authenticates using API keys.

<!-- Importing the Amazon Location Client (which includes the auth-helper) -->
<script src="https://cdn.jsdelivr.net/npm/@aws/amazon-location-client@1"></script>

// Create an authentication helper instance using an API key and region
const authHelper = amazonLocationClient.withAPIKey("<API Key>", "<Region>");

// Configures the client to use API keys when making supported requests
const client = new amazonLocationClient.GeoRoutesClient(authHelper.getClientConfig());
const input = { ... };
const command = new amazonLocationClient.routes.CalculateRoutesCommand(input);
const response = await client.send(command);

This example uses the Amazon Location Client to make a request that that authenticates using Amazon Cognito.

<!-- Import the Amazon Location Client (which includes the auth-helper) -->
<script src="https://cdn.jsdelivr.net/npm/@aws/amazon-location-client@1"></script>

// Create an authentication helper instance using credentials from Cognito
const authHelper = await amazonLocationClient.withIdentityPoolId("<Identity Pool ID>");

// Configures the client to use credentials obtained via Amazon Cognito
const client = new amazonLocationClient.GeoRoutesClient(authHelper.getClientConfig());
const input = { ... };
const command = new amazonLocationClient.routes.CalculateRoutesCommand(input);
const response = await client.send(command);

This example uses MapLibre GL JS to render a map that authenticates resource requests using an API key.

The authentication helper is not needed when using MapLibre to render a map using API keys, because the style descriptor URL and API key can be passed into the style endpoint directly.

<!-- MapLibre GL JS -->
<script src="https://cdn.jsdelivr.net/npm/maplibre-gl@4"></script>

const apiKey = "<API Key>";
const region = "<Region>"; // Region containing Amazon Location resource
const styleName = "Standard"; // Standard, Monochrome, Hybrid, or Satellite

// Render the map
const map = new maplibregl.Map({
  container: "map",
  center: [-123.115898, 49.295868],
  zoom: 10,
  style: `https://maps.geo.${region}.amazonaws.com/v2/styles/${styleName}/descriptor?key=${apiKey}`,
});

This example uses MapLibre GL JS to render a map that authenticates resource requests using Amazon Cognito.

<!-- MapLibre GL JS -->
<script src="https://cdn.jsdelivr.net/npm/maplibre-gl@4"></script>
<!-- Importing the authentication SDK -->
<script src="https://cdn.jsdelivr.net/npm/@aws/amazon-location-utilities-auth-helper@1"></script>

const identityPoolId = "<Identity Pool ID>";
const region = "<Region>"; // Region containing Amazon Location resource
const styleName = "Standard"; // Standard, Monochrome, Hybrid, or Satellite

// Create an authentication helper instance using credentials from Cognito
const authHelper = await amazonLocationAuthHelper.withIdentityPoolId(identityPoolId);

// Render the map
const map = new maplibregl.Map({
  container: "map",
  center: [-123.115898, 49.295868],
  zoom: 10,
  style: `https://maps.geo.${region}.amazonaws.com/v2/styles/${styleName}/descriptor`,
  ...authHelper.getMapAuthenticationOptions(),
});

Alternatively, should you prefer to use authenticated identities you can modify the withIdentityPoolId signature to provide custom parameters:

const userPoolId = "<User pool Id>";
...

// Create an authentication helper instance using credentials from Cognito
const authHelper = await amazonLocationAuthHelper.withIdentityPoolId(identityPoolId, {
  logins: {
    [`cognito-idp.${region}.amazonaws.com/${userPoolId}`]: "cognito-id-token"
  }
});

...

You can retrieve the cognito-id-token from the user session using Amplify

Documentation

Detailed documentation can be generated under docs/index.html by running:

npm run typedoc

withAPIKey

Creates an auth helper instance using API key (and region, optionally).

const authHelper = withAPIKey(apiKey, region);

withIdentityPoolId

Creates an auth helper instance using credentials from Cognito.

const authHelper = await withIdentityPoolId(identityPoolId);

Getting Help

The best way to interact with our team is through GitHub. You can open an issue and choose from one of our templates for bug reports, feature requests or guidance. If you have a support plan with AWS Support, you can also create a new support case.

Please make sure to check out the following resources before opening an issue:

• Our Changelog for recent changes.

Contributing

We welcome community contributions and pull requests. See CONTRIBUTING.md for information on how to set up a development environment and submit code.

License

Amazon Location Utilities - Authentication Helper for JavaScript is distributed under the Apache License, Version 2.0, see LICENSE.txt and NOTICE.txt for more information.