Dify Chat Agent with JWT Authentication

This is a Python application that provides JWT authentication and integrates with the Dify API for chat functionality.

Features

• JWT-based authentication
• Integration with Dify API for chat
• FastAPI backend
• Secure password hashing
• Environment variable configuration

Setup

1. Install the required dependencies:

pip install -r requirements.txt

2. Configure the application:

   • Copy .env.example to .env:

     cp .env.example .env

   • Update the values in .env file with your settings:

     # JWT Settings
     SECRET_KEY=your-secret-key-here
     ALGORITHM=HS256
     ACCESS_TOKEN_EXPIRE_MINUTES=30
     
     # Dify API Settings
     DIFY_API_URL=http://localhost/v1
     DIFY_API_KEY=your-dify-api-key
     
     # Server Settings
     HOST=0.0.0.0
     PORT=8000
     

3. Set up Python virtual environment (recommended):

   # Create virtual environment
   python -m venv venv
   
   # Activate virtual environment
   # On Windows:
   .\venv\Scripts\activate
   # On Unix or MacOS:
   source venv/bin/activate
   
   # Install dependencies
   pip install -r requirements.txt

Usage

1. Start the server:

python main.py

2. The server will run on http://localhost:8000

Authentication

1. Get a JWT token:

curl -X POST "http://localhost:8000/token" -H "Content-Type: application/x-www-form-urlencoded" -d "username=testuser&password=testpassword"

2. Use the token for authenticated requests:

curl -X POST "http://localhost:8000/chat" -H "Authorization: Bearer YOUR_TOKEN" -H "Content-Type: application/json" -d '{"query": "Hello", "response_mode": "blocking"}'

Default Credentials

• Username: testuser
• Password: testpassword

API Endpoints

• POST /token: Get JWT token
• POST /chat: Send message to Dify API

Environment Variables

The application uses the following environment variables:

• SECRET_KEY: JWT secret key for token generation
• ALGORITHM: JWT algorithm (default: HS256)
• ACCESS_TOKEN_EXPIRE_MINUTES: Token expiration time in minutes
• DIFY_API_URL: Dify API endpoint URL
• DIFY_API_KEY: Dify API key
• HOST: Server host address
• PORT: Server port number

Environment Variable Priority

The application loads environment variables in the following order:

1. System environment variables
2. .env file
3. Default values in the code

Security Notes

• Never commit the .env file to version control
• Use strong, unique values for SECRET_KEY in production
• Implement proper user management in production
• Keep your API keys secure