Thumbnail Generator

Thumbnail generator API.

Architecture

The application architecture is composed as follows:

Deployment

The application is deployed trough AWS CloudFormation using Github Actions [pipeline file].

It is composed by two stages:

• test: execute unit tests using unittests module and create a coverage report using the coverage module.
• build-and-deploy: build and deploy the application using sam build and sam deploy.

Limitations

The application has the following limitatinos:

• Maximum input file size is 10mb, due to AWS API Gateway.
• Allowed input image types: .PNG and .JPEG.

Local testing

Create virtual environment:

python -m venv venv
source venv/bin/activate

Install dependencies:

pip install -r requirements.txt

Start the local server:

uvicorn src.app.main:app --reload --port 80 

This will start a server at http://127.0.0.0:80.

Swagger documentation is available at: http://127.0.0.0:80/docs.

Consumer example:

Use the following snippet to request a thumbnail using Python:

import io

import requests
from PIL import Image

if __name__ == "__main__":
    with open("tests/horse.png", "rb") as f:
        response = requests.post(
            "http://127.0.0.1:80/create",
            data={
                "width": 128,
                "height": 128,
                "output_format": "png",
            },
            files={"file": f.read()},
        )

        image = Image.open(io.BytesIO(response.content))
        image.show()

Postman collection

Import this postman collection to test the application out.