FastAPI Chat Application

This is a real-time chat application built with FastAPI, SQLAlchemy, and WebSockets. It supports user authentication, private messaging, group chats, and message encryption.

Features

• User authentication (signup and login)
• Real-time private messaging
• Group chats
• Message encryption
• Persistent message storage with SQLAlchemy

Requirements

• Python 3.10
• Docker (for deployment)
• AWS CLI (for deployment)

Setup

Clone the repository

git clone https://github.com/yousafbinfarrukh/fastapi-chat-server.git
cd fastapi-chat-server

Create a virtual environment

python -m venv venv
source venv/bin/activate  # On Windows use `venv\Scripts\activate`

Install dependencies

pip install -r requirements.txt

Environment Variables

Generate encryption key and secret key using generate_encryption_key.py and generate_secret_key.py:

Create a .env file in the root directory and add the following environment variables:

SECRET_KEY=your_jwt_secret_key
ENCRYPTION_KEY=your_generated_encryption_key

Initialize the Database

Run the following command to create the database tables:

python -m app.main

Running the Application

Run with Uvicorn

uvicorn app.main:app --reload

Run with Docker

Build Docker Image

docker build -t chat-api .

Run Docker Container

docker run -it -p 8000:8000 chat-api

API Endpoints

Authentication

• POST /signup: Register a new user
• POST /login: Login a user

WebSocket

• /ws: WebSocket endpoint for real-time chat

Groups

• POST /create_group: Create a new group
• POST /join_group: Join a group
• POST /leave_group: Leave a group

License

This project is licensed under the MIT License.