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"""
Request middleware for logging, metrics, and request tracking
"""
import time
from fastapi import Request
from ..core.logging import get_logger
from ..core.metrics import REQUEST_COUNT, REQUEST_DURATION, ERROR_COUNT
from ..utils.helpers import generate_request_id
logger = get_logger()
async def request_middleware(request: Request, call_next):
"""Middleware for request tracking, metrics, and logging"""
start_time = time.time()
request_id = generate_request_id()
# Add request ID to request state
request.state.request_id = request_id
# Log request
logger.info(
"request_started",
request_id=request_id,
method=request.method,
url=str(request.url),
client_ip=request.client.host if request.client else "unknown",
user_agent=request.headers.get("user-agent", "unknown")
)
try:
response = await call_next(request)
# Calculate duration
duration = time.time() - start_time
# Update metrics
REQUEST_COUNT.labels(
method=request.method,
endpoint=request.url.path,
status=response.status_code
).inc()
REQUEST_DURATION.labels(
method=request.method,
endpoint=request.url.path
).observe(duration)
# Log response
logger.info(
"request_completed",
request_id=request_id,
status_code=response.status_code,
duration=duration
)
# Add request ID and timing to response headers
response.headers["X-Request-ID"] = request_id
response.headers["X-Response-Time"] = f"{duration:.3f}s"
response.headers["X-Response-Time-Ms"] = f"{duration * 1000:.1f}"
return response
except Exception as e:
duration = time.time() - start_time
# Update error metrics
ERROR_COUNT.labels(error_type=type(e).__name__).inc()
# Log error
logger.error(
"request_failed",
request_id=request_id,
error=str(e),
error_type=type(e).__name__,
duration=duration
)
raise
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