Mock sample: AWS S3 API

[waldekmastykarz]

Description

Create a mock sample for AWS S3 API.

Update: LocalStack (64k+ GitHub stars) is the de facto standard for mocking AWS services locally. It provides a fully functional local AWS cloud stack including S3. Consider using LocalStack instead.

Alternative: LocalStack

LocalStack is a cloud service emulator that runs in a single container on your laptop or in your CI environment. With LocalStack, you can run your AWS applications or Lambdas entirely on your local machine without connecting to a remote cloud provider.

Features

• Full S3 API emulation
• Supports most AWS services (Lambda, DynamoDB, SQS, SNS, and more)
• Docker-based, easy to run locally or in CI/CD
• Active community with 64k+ GitHub stars

Quick Start

# Install
brew install localstack/tap/localstack-cli

# Start
localstack start -d

# Use with AWS CLI
awslocal s3 mb s3://my-bucket
awslocal s3 cp myfile.txt s3://my-bucket

See: https://github.com/localstack/localstack

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Original request (for reference)

Why

• Ubiquitous cloud storage API
• Many devs use AWS SDKs that can be configured for local endpoints
• Enables offline development without AWS credentials
• Cost savings during development/testing

Suggested endpoints to mock

• Object operations (GET, PUT, DELETE)
• Bucket listing
• Presigned URL generation
• Multipart upload
• Error responses (NoSuchKey, AccessDenied, etc.)