AWS API Gateway Use-case based Questions ❓

Choosing the Right Integration for AWS API Gateway

Lambda Proxy Integration

• Scenario: You are developing a serverless REST API where each endpoint performs specific business logic, like user authentication, data processing, or interacting with databases.
• Example: An e-commerce platform where different Lambda functions handle product listings, user orders, and payment processing.

Lambda Non-Proxy Integration

• Scenario: You need to preprocess incoming API requests to extract or transform certain data before passing it to the Lambda function.
• Example: An IoT application where sensor data needs to be preprocessed and formatted before invoking a Lambda function for analysis.

HTTP Proxy Integration

• Scenario: You have an existing web service hosted on an EC2 instance or any other HTTP backend that you want to expose via API Gateway.
• Example: Exposing an internal inventory management system through a secure, public API.

HTTP Custom Integration

• Scenario: Similar to HTTP proxy integration but with the need to customize and transform the incoming requests and outgoing responses.
• Example: Integrating with a legacy backend system where request and response formats need to be adapted.

AWS Service Integration

• Scenario: You need direct interactions with AWS services without the overhead of managing intermediate Lambda functions.
• Example: A photo-sharing application where users can upload images directly to S3 through an API Gateway endpoint.

Mock Integration

• Scenario: You are developing and testing the frontend of your application and need API endpoints that return mock data.
• Example: Creating a prototype of a mobile app that interacts with an API that returns static responses for testing.

Choosing the Right Integration

When deciding which integration type to use, consider the following:

• Lambda Proxy Integration is great for serverless backends with minimal configuration.
• Lambda Non-Proxy Integration provides flexibility in request/response transformation.
• HTTP Proxy Integration is ideal for quick exposure of existing HTTP services.
• HTTP Custom Integration is needed for custom request/response transformations.
• AWS Service Integration is useful for direct AWS service interactions.
• Mock Integration is best for prototyping and testing without a backend.