Chain Logging

Description

Distinct every request with an ID on your logger and make your log looks like chained

How to use?

Very easy to initialize for both FastAPI and Flask.

FastAPI

from fastapi import FastAPI, Request
from chain_logging.fastapi import ChainLoggerMiddleware, get_chained_logger

app = FastAPI()

app.add_middleware(ChainLoggerMiddleware, before_request=True, after_request=True)

@app.get("/home")
async def home(request: Request):
    logger = await get_chained_logger(request)
    logger.info("this is a trial 1")
    logger.error("this is a trial 2")
    logger.warning("this is a trial 3")
    logger.critical("this is a trial 3")
    return {"status": "welcome home!"}

Output

[2022-11-09 03:11:31,835][ID:1667963491835419699][fastapi.py:225][INFO] - Received GET /home
[2022-11-09 03:11:31,836][ID:1667963491835419699][__init__.py:14][INFO] - this is a trial 1
[2022-11-09 03:11:31,836][ID:1667963491835419699][__init__.py:15][ERROR] - this is a trial 2
[2022-11-09 03:11:31,836][ID:1667963491835419699][__init__.py:16][WARNING] - this is a trial 3
[2022-11-09 03:11:31,836][ID:1667963491835419699][__init__.py:17][CRITICAL] - this is a trial 3
[2022-11-09 03:11:31,836][ID:1667963491835419699][fastapi.py:236][INFO] - Request done in 1.17ms
[2022-11-09 03:12:19,152][ID:1667963539151928302][fastapi.py:225][INFO] - Received GET /home
[2022-11-09 03:12:19,152][ID:1667963539151928302][__init__.py:14][INFO] - this is a trial 1
[2022-11-09 03:12:19,152][ID:1667963539151928302][__init__.py:15][ERROR] - this is a trial 2
[2022-11-09 03:12:19,152][ID:1667963539151928302][__init__.py:16][WARNING] - this is a trial 3
[2022-11-09 03:12:19,152][ID:1667963539151928302][__init__.py:17][CRITICAL] - this is a trial 3
[2022-11-09 03:12:19,153][ID:1667963539151928302][fastapi.py:236][INFO] - Request done in 1.37ms
[2022-11-09 03:12:21,892][ID:1667963541892393491][fastapi.py:225][INFO] - Received GET /home
[2022-11-09 03:12:21,893][ID:1667963541892393491][__init__.py:14][INFO] - this is a trial 1
[2022-11-09 03:12:21,893][ID:1667963541892393491][__init__.py:15][ERROR] - this is a trial 2
[2022-11-09 03:12:21,893][ID:1667963541892393491][__init__.py:16][WARNING] - this is a trial 3
[2022-11-09 03:12:21,893][ID:1667963541892393491][__init__.py:17][CRITICAL] - this is a trial 3
[2022-11-09 03:12:21,894][ID:1667963541892393491][fastapi.py:236][INFO] - Request done in 1.62ms

Flask

from flask import Flask
from chain_logging.flask import setup_chained_logger, logger

app = Flask(__name__)

setup_chained_logger(app, before_request=True, after_request=True)

@app.get("/home")
def home():
    logger.info("this is a trial 1")
    logger.error("this is a trial 2")
    logger.warning("this is a trial 3")
    logger.critical("this is a trial 3")
    return {"status": "welcome home!"}

Output

[2022-11-09 10:23:29,769][ID:1667964209768871143][main.py:252][INFO] - Received GET /home
[2022-11-09 10:23:29,769][ID:1667964209768871143][main.py:328][INFO] - this is a trial 1
[2022-11-09 10:23:29,770][ID:1667964209768871143][main.py:329][ERROR] - this is a trial 2
[2022-11-09 10:23:29,770][ID:1667964209768871143][main.py:330][WARNING] - this is a trial 3
[2022-11-09 10:23:29,770][ID:1667964209768871143][main.py:331][CRITICAL] - this is a trial 3
[2022-11-09 10:23:29,771][ID:1667964209768871143][main.py:259][INFO] - Request done in 2.53ms
[2022-11-09 10:23:30,407][ID:1667964210407508175][main.py:252][INFO] - Received GET /home
[2022-11-09 10:23:30,408][ID:1667964210407508175][main.py:328][INFO] - this is a trial 1
[2022-11-09 10:23:30,408][ID:1667964210407508175][main.py:329][ERROR] - this is a trial 2
[2022-11-09 10:23:30,408][ID:1667964210407508175][main.py:330][WARNING] - this is a trial 3
[2022-11-09 10:23:30,409][ID:1667964210407508175][main.py:331][CRITICAL] - this is a trial 3
[2022-11-09 10:23:30,410][ID:1667964210407508175][main.py:259][INFO] - Request done in 2.41ms
[2022-11-09 10:23:30,831][ID:1667964210831595163][main.py:252][INFO] - Received GET /home
[2022-11-09 10:23:30,832][ID:1667964210831595163][main.py:328][INFO] - this is a trial 1
[2022-11-09 10:23:30,832][ID:1667964210831595163][main.py:329][ERROR] - this is a trial 2
[2022-11-09 10:23:30,832][ID:1667964210831595163][main.py:330][WARNING] - this is a trial 3
[2022-11-09 10:23:30,833][ID:1667964210831595163][main.py:331][CRITICAL] - this is a trial 3
[2022-11-09 10:23:30,833][ID:1667964210831595163][main.py:259][INFO] - Request done in 2.07ms

Change Logging format

Create your new ChainLogger using ChainFilter

FastAPI

from fastapi import FastAPI, Request
from chain_logging.fastapi import ChainLoggerMiddleware, get_chained_logger, ChainLogger, ChainFilter

app = FastAPI()

my_filter = ChainFilter(log_format="%(asctime)s - %(exec_id)s - %(levelname)s - %(message)s")
logger = ChainLogger(name="ChainLogger", filter_object=my_filter)
app.add_middleware(ChainLoggerMiddleware, logger=logger, before_request=True, after_request=True)

Flask

from flask import Flask
from chain_logging.flask import setup_chained_logger, logger, ChainLogger, ChainFiler

app = Flask(__name__)

my_filter = ChainFilter(log_format="%(asctime)s - %(exec_id)s - %(levelname)s - %(message)s")
logger = ChainLogger(name="ChainLogger", filter_object=my_filter)
setup_chained_logger(app, logger=logger, before_request=True, after_request=True)