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ivschat Client - AWS SDK for JavaScript v3

@aws-sdk/client-ivschat

NPM version NPM downloads

Description

AWS SDK for JavaScript Ivschat Client for Node.js, Browser and React Native.

Introduction

The Amazon IVS Chat control-plane API enables you to create and manage Amazon IVS Chat resources. You also need to integrate with the Amazon IVS Chat Messaging API, to enable users to interact with chat rooms in real time.

The API is an AWS regional service. For a list of supported regions and Amazon IVS Chat HTTPS service endpoints, see the Amazon IVS Chat information on the Amazon IVS page in the AWS General Reference.

Notes on terminology:

  • You create service applications using the Amazon IVS Chat API. We refer to these as applications.

  • You create front-end client applications (browser and Android/iOS apps) using the Amazon IVS Chat Messaging API. We refer to these as clients.

Resources

The following resource is part of Amazon IVS Chat:

  • Room — The central Amazon IVS Chat resource through which clients connect to and exchange chat messages. See the Room endpoints for more information.

API Access Security

Your Amazon IVS Chat applications (service applications and clients) must be authenticated and authorized to access Amazon IVS Chat resources. Note the differences between these concepts:

  • Authentication is about verifying identity. Requests to the Amazon IVS Chat API must be signed to verify your identity.

  • Authorization is about granting permissions. Your IAM roles need to have permissions for Amazon IVS Chat API requests.

Users (viewers) connect to a room using secure access tokens that you create using the CreateChatToken endpoint through the AWS SDK. You call CreateChatToken for every user’s chat session, passing identity and authorization information about the user.

Signing API Requests

HTTP API requests must be signed with an AWS SigV4 signature using your AWS security credentials. The AWS Command Line Interface (CLI) and the AWS SDKs take care of signing the underlying API calls for you. However, if your application calls the Amazon IVS Chat HTTP API directly, it’s your responsibility to sign the requests.

You generate a signature using valid AWS credentials for an IAM role that has permission to perform the requested action. For example, DeleteMessage requests must be made using an IAM role that has the ivschat:DeleteMessage permission.

For more information:

Messaging Endpoints

  • DeleteMessage — Sends an event to a specific room which directs clients to delete a specific message; that is, unrender it from view and delete it from the client’s chat history. This event’s EventName is aws:DELETE_MESSAGE. This replicates the DeleteMessage WebSocket operation in the Amazon IVS Chat Messaging API.

  • DisconnectUser — Disconnects all connections using a specified user ID from a room. This replicates the DisconnectUser WebSocket operation in the Amazon IVS Chat Messaging API.

  • SendEvent — Sends an event to a room. Use this within your application’s business logic to send events to clients of a room; e.g., to notify clients to change the way the chat UI is rendered.

Chat Token Endpoint

  • CreateChatToken — Creates an encrypted token that is used to establish an individual WebSocket connection to a room. The token is valid for one minute, and a connection (session) established with the token is valid for the specified duration.

Room Endpoints

  • CreateRoom — Creates a room that allows clients to connect and pass messages.

  • DeleteRoom — Deletes the specified room.

  • GetRoom — Gets the specified room.

  • ListRooms — Gets summary information about all your rooms in the AWS region where the API request is processed.

  • UpdateRoom — Updates a room’s configuration.

Tags Endpoints

  • ListTagsForResource — Gets information about AWS tags for the specified ARN.

  • TagResource — Adds or updates tags for the AWS resource with the specified ARN.

  • UntagResource — Removes tags from the resource with the specified ARN.

All the above are HTTP operations. There is a separate messaging API for managing Chat resources; see the Amazon IVS Chat Messaging API Reference.

Installing

To install the this package, simply type add or install @aws-sdk/client-ivschat using your favorite package manager:

  • npm install @aws-sdk/client-ivschat
  • yarn add @aws-sdk/client-ivschat
  • pnpm add @aws-sdk/client-ivschat

Getting Started

Import

The AWS SDK is modulized by clients and commands. To send a request, you only need to import the IvschatClient and the commands you need, for example CreateChatTokenCommand:

// ES5 example
const { IvschatClient, CreateChatTokenCommand } = require("@aws-sdk/client-ivschat");
// ES6+ example
import { IvschatClient, CreateChatTokenCommand } from "@aws-sdk/client-ivschat";

Usage

To send a request, you:

  • Initiate client with configuration (e.g. credentials, region).
  • Initiate command with input parameters.
  • Call send operation on client with command object as input.
  • If you are using a custom http handler, you may call destroy() to close open connections.
// a client can be shared by different commands.
const client = new IvschatClient({ region: "REGION" });

const params = {
  /** input parameters */
};
const command = new CreateChatTokenCommand(params);

Async/await

We recommend using await operator to wait for the promise returned by send operation as follows:

// async/await.
try {
  const data = await client.send(command);
  // process data.
} catch (error) {
  // error handling.
} finally {
  // finally.
}

Async-await is clean, concise, intuitive, easy to debug and has better error handling as compared to using Promise chains or callbacks.

Promises

You can also use Promise chaining to execute send operation.

client.send(command).then(
  (data) => {
    // process data.
  },
  (error) => {
    // error handling.
  }
);

Promises can also be called using .catch() and .finally() as follows:

client
  .send(command)
  .then((data) => {
    // process data.
  })
  .catch((error) => {
    // error handling.
  })
  .finally(() => {
    // finally.
  });

Callbacks

We do not recommend using callbacks because of callback hell, but they are supported by the send operation.

// callbacks.
client.send(command, (err, data) => {
  // process err and data.
});

v2 compatible style

The client can also send requests using v2 compatible style. However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post on modular packages in AWS SDK for JavaScript

import * as AWS from "@aws-sdk/client-ivschat";
const client = new AWS.Ivschat({ region: "REGION" });

// async/await.
try {
  const data = await client.createChatToken(params);
  // process data.
} catch (error) {
  // error handling.
}

// Promises.
client
  .createChatToken(params)
  .then((data) => {
    // process data.
  })
  .catch((error) => {
    // error handling.
  });

// callbacks.
client.createChatToken(params, (err, data) => {
  // process err and data.
});

Troubleshooting

When the service returns an exception, the error will include the exception information, as well as response metadata (e.g. request id).

try {
  const data = await client.send(command);
  // process data.
} catch (error) {
  const { requestId, cfId, extendedRequestId } = error.$$metadata;
  console.log({ requestId, cfId, extendedRequestId });
  /**
   * The keys within exceptions are also parsed.
   * You can access them by specifying exception names:
   * if (error.name === 'SomeServiceException') {
   *     const value = error.specialKeyInException;
   * }
   */
}

Getting Help

Please use these community resources for getting help. We use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.

To test your universal JavaScript code in Node.js, browser and react-native environments, visit our code samples repo.

Contributing

This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-ivschat package is updated. To contribute to client you can check our generate clients scripts.

License

This SDK is distributed under the Apache License, Version 2.0, see LICENSE for more information.