Integrating AWS Lambda with API Gateway: A Comprehensive Guide
Mauro Nunes
Full stack | Front-end | Back-end | Javascript | Node.js | React | Git | HTML | CSS | SQL | PostgreSQL
In some previous articles, I have talked about Creating an AWS Lambda Function: My Journey and Tips and also about DynamoDB: My Journey and Insights. If you read the last one, you definitely saw a mention of the API Gateway. Today, I want to dive deeper into this powerful service.
What is Amazon API Gateway?
According to Amazon:
"Amazon API Gateway is an AWS service for creating, publishing, maintaining, monitoring, and securing REST, HTTP, and WebSocket APIs at any scale."
The above diagram illustrates how API Gateway works as a front door for applications. For more details about what API Gateway is and how it operates, check out the official documentation here.
Why Use API Gateway?
It's truly amazing how quickly you can connect an AWS Lambda function with API Gateway and make it accessible. However, there are important considerations you need to keep in mind, especially when deciding the type of API you need.
Choosing Between REST API and HTTP API
There are two main types of APIs offered by API Gateway:
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If you're unsure which option suits your needs, check out this comparison: REST API vs HTTP API.
Setting Up API Gateway
Once you’ve determined the type of API you need, it’s time to set up API Gateway. You can follow the step-by-step guide provided in the official AWS documentation here.
Integrating AWS Lambda with API Gateway
Before integrating my AWS Lambda function with API Gateway, I explored the two available integration types to determine which was best for my use case:
Final Thoughts
Now that you have the basics, integrating your AWS Lambda function with API Gateway should be straightforward. For a comprehensive step-by-step guide, refer to this resource.
Whether you're building serverless applications, handling API requests, or connecting IoT devices, API Gateway serves as a reliable and scalable solution. Let me know your thoughts and experiences in the comments below!