FastAPI RealTime Chat Backend

Full-stack Real-Time Chat Application Backend using FastAPI, PostgreSQL, and WebSockets.

Features

• Google Authentication (No password login).
• Real-Time Chat using native WebSockets.
• Room/Group Management: Create rooms, join rooms.
• Video/Audio Calls: WebRTC Signaling over WebSockets (Mesh Network).
• PostgreSQL Database with SQLAlchemy ORM.

Setup

1. Clone the repository.
2. Create Virtual Environment:

   python -m venv venv
   .\venv\Scripts\activate

3. Install Dependencies:

   pip install -r requirements.txt

4. Configuration:
   • Update .env file with your PostgreSQL credentials and Google Client ID.

   DATABASE_URL=postgresql+psycopg2://user:password@localhost/dbname
   GOOGLE_CLIENT_ID=your-google-client-id
   SECRET_KEY=your-secret-key

5. Run the Server:

   uvicorn app.main:app --reload

   The server will start at http://127.0.0.1:8000. API Documentation: http://127.0.0.1:8000/docs.

API Endpoints

• POST /login/google: Authenticate with Google Token.
• GET /users/me: Get current user info.
• GET /api/rooms: Get my rooms.
• POST /api/rooms: Create a new room.
• GET /api/rooms/{id}/messages: Get room history.
• WS /ws?token={jwt}: WebSocket connection for Chat and WebRTC.