AWS Amplify mulitple API calls

To implement your application with AWS Amplify where a button click initiates a remote web browser on EC2 and processes form data, you'll need to combine several AWS services with Amplify.

Here's how you can approach this:

1. Create a mobile app with AWS Amplify:

• Develop your mobile application using a framework like React Native
• Use AWS Amplify to integrate AWS services into your app
• Create a user interface with a form for collecting user details and a button to initiate the process

2. Set up a serverless backend:

• Use AWS AppSync or API Gateway with Lambda functions to create API endpoints
• Implement an API that will handle the communication between your mobile app and the EC2 instance running your web browser

3. API implementation:

• Create an API endpoint to start the remote browser session on your EC2 instance
• Create another endpoint to send the form data to the EC2 instance
• Implement an endpoint to receive validation results from the EC2 instance

4. Making the API calls from your app:

• Import the API module from AWS Amplify in your component:

import { API } from 'aws-amplify';

• Implement functions to make the necessary API calls:
• One function to initiate the remote browser when the button is clicked
• Another function to send form data for validation
• A function to handle the validation response

5. EC2 Configuration:

• Your EC2 instance needs to be configured to start a web browser session upon request
• Implement a service on the EC2 instance that can receive the form data, validate it, and send back results
• Configure security groups to allow communication between your Lambda functions and the EC2 instance

6. User Authentication:

• Use Amazon Cognito for user management and authentication to ensure secure access to your application and APIs

This approach leverages AWS Amplify for the frontend development and API integration, while using EC2 for your specific remote browser requirement. The communication between components is handled through RESTful API calls, allowing your mobile app to control the remote browser session and process form data validation.
Sources
My own mobile application via aws | AWS re:Post
Access Your APIs - AWS Mobile Hub
Key considerations when using AWS for web hosting - Web Application Hosting in the AWS Cloud

Hi Keerthi

To implement the described application on AWS using AWS Amplify, you need to use AWS Amplify for the frontend, AWS Lambda for backend logic, Amazon API Gateway for API management, Amazon DynamoDB for state management, and a remote browser setup with a suitable compute environment. Additional AWS services such as AWS IAM and Amazon CloudWatch are also required for security, monitoring, and logging.

Step 1: Set up the Amplify App Create an Amplify project and add authentication (optional but recommended). Design the UI with a button to initiate the remote browser session, a form for user input, and display areas for feedback/error messages.

amplify init amplify add auth Step 2: Configure the Backend API Add an API using AWS Amplify, choosing "REST" and creating new Lambda functions for each API endpoint. Define API endpoints such as /startSession, /validateDetails, /executeTask, and /getSessionStatus.

amplify add api Step 3: Implement Lambda Functions Implement the logic for each Lambda function:

startSession Lambda: Generates a unique session ID, stores it in DynamoDB, provisions the remote browser instance, and returns the session ID. validateDetails Lambda: Retrieves the session from DynamoDB, gets user details from the request body, sends the details to the remote browser for validation, updates the session status in DynamoDB, and returns the validation result. executeTask Lambda: Retrieves the session from DynamoDB, verifies that the details have been validated, sends a request to the remote browser to execute the task, updates the session status in DynamoDB, and returns the execution result. getSessionStatus Lambda: Retrieves the session from DynamoDB and returns the session status to the Amplify app. Step 4: Set up the Remote Browser Choose a technology (Selenium, Puppeteer, or Playwright) and a compute environment (EC2, Lambda with container image, or Fargate). Implement an API for the remote browser with endpoints like /validate and /execute.

Step 5: Configure DynamoDB Create a DynamoDB table named RemoteBrowserSessions with a primary key session_id and attributes such as status, details, validation_errors, execution_result, and remote_browser_url.

Step 6: Implement Amplify App Logic Implement the logic for the Amplify app:

Button Click Handler: Calls the /startSession API endpoint and stores the session ID. Form Submission Handler: Calls the /validateDetails API endpoint, displays validation errors, and enables the "Execute" button if validation is successful. "Execute" Button Handler: Calls the /executeTask API endpoint and displays the execution result. Status Polling (Optional): Periodically calls the /getSessionStatus API endpoint to get the latest status of the session. Step 7: Update Amplify Configuration Push the changes to Amplify to deploy the Lambda functions and API Gateway endpoints. Configure the Amplify app to use the Amplify API client to make calls to the API Gateway endpoints.

amplify push

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