https://github.com/iwatakeshi/aws-lambda-appsync

Utilities to simplify GraphQL operations in a lambda function for Appsync
https://github.com/iwatakeshi/aws-lambda-appsync

Last synced: 6 days ago
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Utilities to simplify GraphQL operations in a lambda function for Appsync

• Host: GitHub
• URL: https://github.com/iwatakeshi/aws-lambda-appsync
• Owner: iwatakeshi
• License: apache-2.0
• Created: 2020-02-19T23:50:43.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2023-01-06T02:33:58.000Z (about 2 years ago)
• Last Synced: 2024-12-22T00:36:08.656Z (16 days ago)
• Language: TypeScript
• Size: 551 KB
• Stars: 7
• Watchers: 2
• Forks: 0
• Open Issues: 7
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# aws-lambda-appsync

Utilities to simplify GraphQL operations in a Lambda function for Appsync

Currently, there are two ways provided that will allow you to use AppSync in a Lambda function.

The implementations are based on two blog posts:

* [Using Cognito User Pool](https://blog.floom.app/post/aws-appsync-with-lambda)

* [Using IAM](https://docs.aws.amazon.com/appsync/latest/devguide/building-a-client-app-node.html)

**Note**:

There will be tests that need to be done. However, this library simply wraps existing libraries to reduce the boilerplate required to perform GraphQL operations. Thus, please use this library with caution if you plan to use in production (until I can get the tests done).

## Usage

```bash

# Yarn

yarn add @iwatakeshi/aws-lambda-appsync

# NPM

npm install --save @iwatakeshi/aws-lambda-appsync

```

```ts

import { createIAMAppSyncClient, createCognitoUserPoolAppSyncClient } from '@iwatakeshi/aws-lambda-appsync'

// Create a client using IAM

const client = createIAMAppSyncClient({

  url: '...',

  region: process.env.REGION,

  credentials: {

    accessKeyId: process.env.ACCESS_KEY_ID,

    secretAccessKey: process.env.SECRET_ACCESS_KEY

  }

})

// Create a client using Cognito User Pool

const client = createCognitoUserPoolAppSyncClient({

  url: '...',

  region: process.env.REGION,

  clientId: process.env.CLIENT_ID,

  userPoolId: process.env.USER_POOL_ID,

  authParameters: {

    username: process.env.ADMIN_USERNAME,

    password: process.env.ADMIN_PASSWORD

  },

  auth: {

    // Optional, but can be overridden,

    jwtToken: (provider, options) => {

      let credentials, expired = new Date('01-01-1970')

      return async () => {

        // Check if we already have credentials or if credentials are expired

        if (!credentials || expired < new Date()) {

          // Get new credentials (import 'getCredentials' from @iwatakeshi/aws-lambda-appsync/lib/utils/cognito)

          credentials = await getCredentials(provider, options)

         // ...

        }

        return credentials?.AuthenticationResult?.IdToken

      }

    }

  }

})

```