REST API with S3 Integration

Storage service

Amazon S3 provides a great combination of availability, latency, and price. Most applications hosted on AWS use S3 in one form or another. It's not a database in the traditional sense but an object store or a file store. As a result, we can save a large amount of data at a low cost.

We can build an API with S3 integration to enhance this functionality and make it available outside AWS boundaries.

Example

To understand this integration, let’s create a simple API to access files in an S3 bucket. We can build a key-value store API out of S3 and API Gateway. It can be helpful when we want to store huge values that may not fit in a database.

S3 API is based on the path parameters and the HTTP methods. So, a PUT request puts an object, and a GET request gets an object. The path defines the specific bucket and the key of the object in that bucket. The API integration should generate this path in the target API URL and invoke it with the required HTTP method.

Here’s an API that can access all files in all our S3 buckets. It can save data to a new file and read data from an existing one.