QR Code Recognition API Proxy

A FastAPI-based proxy service for Caoliao QR code recognition API.

Features

• Proxy service for Caoliao QR code recognition
• Supports image file upload and QR code content decoding
• Automatic API request handling and response transformation

API Specification

POST /decode_qrcode/

Parameters:

• file: Image file in multipart/form-data format

Success Response:

{
    "content": "decoded QR code content"
}

Error Responses:

• 400: Upload/Decode failure
• 502: Third-party API returned invalid data

Example Request

curl -X POST -F "file=@qrcode.jpg" http://localhost:8000/decode_qrcode/

Error Handling

• 400 Bad Request: Upload or decode failure
• 502 Bad Gateway: Third-party API returned invalid data

How to Run

1. Install dependencies:

pip install fastapi uvicorn aiohttp python-multipart

2. Run the service:

python app.py

The service will be available at http://localhost:8000

Testing

Test Environment Setup

pip install pytest requests pillow qrcode[pil]

Running Tests

1. First start the service:

python app.py

2. In a new terminal, run API tests:

python -m unittest test.test

Expected Results

• Valid QR code: Returns 200 status with content field
• Invalid file: Returns 400 status with error field

Author

bobo

Version

v1.1