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"""
Flask OpenAI Chat Application
Modern Flask app with proper structure and error handling
"""
import os
import logging
from flask import Flask
from flask_cors import CORS
from dotenv import load_dotenv
def create_app():
"""Application factory pattern"""
# Load environment variables
load_dotenv()
app = Flask(__name__)
# Configuration
app.config['SECRET_KEY'] = os.getenv('SECRET_KEY', 'dev-secret-key-change-in-production')
app.config['OPENAI_API_KEY'] = os.getenv('OPENAI_API_KEY')
# Validate required environment variables
if not app.config['OPENAI_API_KEY']:
raise ValueError("❌ OPENAI_API_KEY is not set. Please add it to your .env file.")
# Enable CORS for all routes
CORS(app, origins=["*"]) # In production, specify allowed origins
# Setup logging
setup_logging(app)
# Register blueprints
from app.routes.chat import chat_bp
from app.routes.health import health_bp
app.register_blueprint(chat_bp)
app.register_blueprint(health_bp)
# Error handlers
register_error_handlers(app)
return app
def setup_logging(app):
"""Configure application logging"""
if not app.debug:
# Production logging
if not os.path.exists('logs'):
os.mkdir('logs')
file_handler = logging.handlers.RotatingFileHandler(
'logs/app.log', maxBytes=10240, backupCount=10
)
file_handler.setFormatter(logging.Formatter(
'%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'
))
file_handler.setLevel(logging.INFO)
app.logger.addHandler(file_handler)
app.logger.setLevel(logging.INFO)
app.logger.info('Flask OpenAI Chat startup')
def register_error_handlers(app):
"""Register global error handlers"""
@app.errorhandler(400)
def bad_request(error):
return {'error': 'Bad request', 'message': str(error)}, 400
@app.errorhandler(404)
def not_found(error):
return {'error': 'Not found', 'message': 'The requested resource was not found'}, 404
@app.errorhandler(500)
def internal_error(error):
app.logger.error(f'Server Error: {error}')
return {'error': 'Internal server error', 'message': 'Something went wrong'}, 500 |