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"""Middleware for logging all API requests to SQLite database."""
import logging
from fastapi import Request
from starlette.middleware.base import BaseHTTPMiddleware
logger = logging.getLogger(__name__)
class RequestLoggingMiddleware(BaseHTTPMiddleware):
"""Middleware to log all API requests to SQLite database immediately on receipt."""
def __init__(self, app, database_service):
"""Initialize the middleware.
Args:
app: FastAPI application instance
database_service: DatabaseService instance for logging requests
"""
super().__init__(app)
self.database_service = database_service
async def dispatch(self, request: Request, call_next):
"""Log the request immediately when received, then process it.
Args:
request: FastAPI request object
call_next: Next middleware/handler in the chain
Returns:
Response object
"""
# Get client IP address
client_ip = self._get_client_ip(request)
# Get user agent
user_agent = request.headers.get("user-agent")
# Log the request immediately when received (before processing)
try:
self.database_service.log_request(
method=request.method,
path=request.url.path,
client_ip=client_ip,
user_agent=user_agent,
)
except Exception as e:
# Don't fail the request if logging fails
logger.error(f"Failed to log request: {e}")
# Process the request
response = await call_next(request)
return response
def _get_client_ip(self, request: Request) -> str:
"""Extract client IP address from request.
Checks various headers for the real client IP, accounting for proxies.
Args:
request: FastAPI request object
Returns:
Client IP address as string
"""
# Check for forwarded IP headers (common in proxy/load balancer setups)
forwarded_for = request.headers.get("x-forwarded-for")
if forwarded_for:
# X-Forwarded-For can contain multiple IPs, take the first one
return forwarded_for.split(",")[0].strip()
real_ip = request.headers.get("x-real-ip")
if real_ip:
return real_ip.strip()
# Fallback to direct client IP
if request.client:
return request.client.host
return "unknown"
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