Project 3: Real-Time Data Processing and API Security Framework

This project implements a secure, real-time transaction processing system using FastAPI, OAuth2, and JWT.

How to Test This Project

1. Install Dependencies

Ensure you have the required packages installed:

pip install -r requirements.txt

2. Run the Server

Start the FastAPI server using uvicorn:

python -m uvicorn app.main:app --reload

The API will be available at http://127.0.0.1:8000.

3. Test with Swagger UI (Easiest)

1. Open your browser and go to http://127.0.0.1:8000/docs.
2. Click the Authorize button and enter:
   • Username: admin
   • Password: admin123
3. Now all protected routes are accessible!
4. Try the POST /transactions endpoint with a sample JSON:

   {
     "user_id": "user_001",
     "amount": 150.50,
     "currency": "USD",
     "description": "Payment for services"
   }

4. Test with curl (Command Line)

Step 1: Get Token

curl -X 'POST' \
  'http://127.0.0.1:8000/token' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d 'username=admin&password=admin123'

Step 2: Submit Transaction (Using the token from Step 1)

curl -X 'POST' \
  'http://127.0.0.1:8000/transactions' \
  -H 'accept: application/json' \
  -H 'Authorization: Bearer YOUR_TOKEN_HERE' \
  -H 'Content-Type: application/json' \
  -d '{
  "user_id": "user_001",
  "amount": 100,
  "currency": "USD"
}'