Building a Serverless Application Using Step Functions, API Gateway, Lambda, and S3 in AWS

Within the Simple Email Service (SES) console create a new identity and validate a personal email account for use with the service.

Note If you can, use a gmail account.

Download the zip file containing the lab files from.

GitHub Repo.

Using the contents of the email_reminder.py file, create a lambda function called email. Using Python version 3.x during configuration.

Configure the function to use the LambdaRuntimeRole as the execution role.

On line 3 of the code insert your verified email address into the placeholder text.

Create a Step Function state machine called MyStateMachine(random characters)

Use the code provided in step-function-template.json from the lab bundle to create the Step Function.

Link the Lambda email function and the Step Function together by inserting the Lambda email function arn into the Step Function code placeholder on line 23.

Change the execution role to use the provided RoleForStepFunction

Using the contents of the api_handler.py file, create a lambda function called api_handler. Using Python version 3.x during configuration.

Configure the function to use the LambdaRuntimeRole as the execution role.

On line 6 of the lambda_function.py code insert the State Machine arn into the placeholder text.

In the API Gateway Console create a Rest API

Use the following settings.

• API name: reminders
• Leave Description blank.
• Endpoint Type: Regional

Create Resource called reminders Ensure CORS is enabled Create a method for the reminders resource with the type POST

Use the following settings.

• Integration type: Lambda Function
• Enable Lambda Proxy integration by clicking the toggle.
• Lambda Region: us-east-1
• Lambda Function: Start typing, and then select, api_handler.

When deploying the API create a new stage called prod

Update line 5 of formlogic.js from the static website folder in the lab bundle with the Rest API invoke url endpoint you created in the previous objective.

Ensure the endpoint includes /reminders at the end.

Create a new S3 bucket using these settings.

• Bucket Type General Purpose
• Bucket Name Globally Unique Name
• ACL's enabled
• Allow Public Access

Upload the contents from the static website folder to the S3 bucket changing the permissions to Grant public-read access

Enable Static website hosting, setting the following values.

• Index document index.html
• Error document error.html

Open the static website and fill in the form to test.