Design a serverless URL Shortener service using AWS.
Link to Github repository: https://github.com/anmol111pal/URL-Shortener-using-AWS/
Requirements
Provide an endpoint where the user can request for a shortened version of a URL. Also provide an endpoint that redirects the short URL to the original URL.
Glossary
API Gateway: acts as a single entry point for API calls, routing client requests to the appropriate backend services while also handling tasks like authentication, authorization, and rate limiting.
Lambda: is a serverless, event-driven compute service that allows you to run code without provisioning or managing servers, focusing on code execution and scaling based on events, rather than infrastructure.
Dynamo DB: is a fully managed, serverless NoSQL database service provided by AWS that supports key-value and document data models, designed for high-performance and scalable applications.
Proposed Design Approach
Implementation Plan
Implement a REST API on API Gateway, that exposes two endpoints.
POST /shorten-url — send a URL via request body and shorten the URL.
GET / — redirects the user to the original URL.
Both the endpoints will map to a Lambda function each to process the request.
We will have the following Lambda functions:
ShortenURLFunction— a funtion that receives the original (long) URL and generates a short ID that maps to the provided URL. This function adds this into the Dynamo DB table, and initializes the click count to 0.RedirectURLFunction— a function that receives the short URL, queries the Dynamo DB table. This function increments the click count, and redirects the user to the original URL.
Dynamo DB Schema
{
shortUrl — string
url — string
timestamp — DateTime
clicks — integer
}
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