Logger middleware for Falcon

logger_middleware.py

import falcon
import logging
import time
import json
from uuid import uuid4

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)
handler = logging.FileHandler(filename='app.log', encoding='utf-8')
formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s', datefmt='%d-%b-%y %H:%M:%S')
handler.setFormatter(formatter)
logger.addHandler(handler)

class ResponseLoggerMiddleware(object):
    def process_response(self, req, resp, resource, req_succeeded):
        log = {
            "reqId": str(uuid4()),
            "time": time.time(),
            "host": req.host,
            "method": req.method,
            "uri": req.relative_uri,
            "reqHeaders": req.headers,
            "reqBody": req.media,
            "respBody": json.loads(resp.body) if resp.body else None,
            "status": resp.status[:3],
        }

        if req_succeeded:
            logger.info(json.dumps(log, ensure_ascii=False))
        else:
            logger.error(json.dumps(log, ensure_ascii=False))

# Add this middleware to your Falcon app's middlewares
app = falcon.API(middleware=[
   ResponseLoggerMiddleware(),
])