AWS End to End Web Application

This project demonstrates the integration of five AWS services—Amplify, Lambda, IAM, API Gateway, and DynamoDB—to create and deploy a web application that calculates the power of a given base and exponent. The result of the calculation is stored in a DynamoDB table. https://dev.d2vzk0vjl847d4.amplifyapp.com/

AWS End to End Web Application

Architecture

Amplify : Used to deploy and host the web application.

Lambda: Contains the function that performs the power calculation (base^exponent).

IAM: Manages permissions, ensuring secure access to the DynamoDB table for storing results.

API Gateway: Creates and manages the POST API that triggers the Lambda function.

DynamoDB: Stores the results of the power calculations.

IAM Execution Policy

{
"Version": "2012-10-17",
"Statement": [
    {
        "Sid": "VisualEditor0",
        "Effect": "Allow",
        "Action": [
            "dynamodb:PutItem",
            "dynamodb:DeleteItem",
            "dynamodb:GetItem",
            "dynamodb:Scan",
            "dynamodb:Query",
            "dynamodb:UpdateItem"
        ],
        "Resource": "YOUR-TABLE-ARN"
    }
    ]
}

Lambda function used:

import json
import math
import boto3
from time import gmtime, strftime
dynamodb = boto3.resource('dynamodb')
table = dynamodb.Table('powerofmathdb')
now = strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime())

def lambda_handler(event, context):
    mathResult = math.pow(int(event['base']), int(event['exponent']))
    response = table.put_item(
        Item={
            'ID': str(mathResult),
            'LatestGreetingTime':now
            })
    return {
    'statusCode': 200,
    'body': json.dumps('Your result is ' + str(mathResult))
    }

Link for the Web App

Click here!

Screeshots: