aws-sam-api-gateway-with-cognito-authorizer

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aws-sam-api-gateway-with-cognito-authorizer

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An AWS SAM template which creates an API Gateway API with Cognito authorizer and a Lambda function

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# aws-sam-api-gateway-with-cognito-authorizer

An AWS SAM template which creates an API Gateway API with Cognito authorizer and a Lambda function

## Requirements

* AWS CLI already configured with at least PowerUser permission
* [AWS SAM CLI installed](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html)

## Setup process

Here is the how you can test the template on your side:

1. Download the sam-app.zip file and unzip it

2. Open the template.yaml and update the Lambda function ARN and UserPoolArn. Save the template.yaml file

Note: I hard-coded the function name and function ARN in the template. Under the AWS::Serverless::Function resource, I define the Lambda name as HelloWorldFunction

FunctionName: HelloWorldFunction

Under the AWS::Serverless::Api resource, The uri of the backend Lambda function is the following. The function name in the function ARN matches the FunctionName I defined for the Lambda function.

uri: "arn:aws:apigateway:us-east-2:lambda:path/2015-03-31/functions/arn:aws:lambda:us-east-2:<your-aws-account>:function:HelloWorldFunction:test/invocations"

3. Open the terminal and go to the unzipped folder

```bash
cd sam-app
```

4. Build the application

```bash
sam build --use-container
```

5. Package the application
```bash
sam package \
--output-template-file packaged.yaml \
--s3-bucket <your-s3-bucket-name>
```

6. Deploy the application

```bash
sam deploy \
--template-file packaged.yaml \
--stack-name sam-app \
--capabilities CAPABILITY_IAM \
--region us-east-1
```

--region should be the same as the region of your S3 bucket

7. Open your CloudFormation console and you should be able to see a stack named sam-app

8. Once the Status of the stack becomes CREATE_COMPLETE, you can open the stack and see the API and Lambda function under the Outputs Section

aws-sam-api-gateway-with-cognito-authorizer

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