[HELP] how to use with uvicorn

[FatPuffer]

Help Request

My project uses Uvicorn to proxy FastAPI. How can I use Logly to take over Uvicorn's logs and output them to a file?

Context

My project uses Uvicorn to proxy FastAPI. How can I use Logly to take over Uvicorn's logs and output them to a file?

Code Example

Logly Version

0.1.6

Python Version

3.13

Operating System

windows

Additional Information

No response

Solution Interest

I just need help/guidance

Question Type

No response

Specific Questions

No response

Checklist

• I have searched the documentation and existing issues
• This is not a bug report (use the bug report template instead)
• This is not a feature request (use the feature request template instead)

[muhammad-fiaz]

Hey @FatPuffer 👋

here’s how you can make Logly take over Uvicorn’s logs (access + error) and output them cleanly to files.

Example

    from logly import logger
    from fastapi import FastAPI
    import logging
    
    app = FastAPI()
    logger.configure(auto_sink=False)
    # Add Logly sinks (console + file)
    logger.add("console")
    logger.add("logs/uvicorn.log", rotation="daily", retention=7)
    
    # Redirect Uvicorn loggers to Logly
    for name in ["uvicorn", "uvicorn.error", "uvicorn.access", "uvicorn.asgi"]:
        uv_logger = logging.getLogger(name)
        uv_logger.handlers.clear()      # remove default handlers
        uv_logger.propagate = True      # allow propagation to Logly
    
    # Optional: structured JSON logs
    # logger.configure(json=True)
    
    @app.get("/")
    def home():
        logger.info("Hello from FastAPI with Logly!")
        return {"message": "Hello World"}
    
    # Run with:
    # uvicorn main:app --reload
    

alternative example:

from logly import logger
from fastapi import FastAPI

app = FastAPI()
logger.configure(auto_sink=False)

# Add Logly sinks (console + file)
logger.add("console")
logger.add("logs/uvicorn.log", rotation="daily", retention=7)

# Redirect Uvicorn loggers to Logly using Logly itself
import uvicorn
uvicorn_logger = logger.bind(name="uvicorn")  # bind a logger for Uvicorn

@app.get("/")
def home():
    logger.info("Hello from FastAPI with Logly!")
    uvicorn_logger.info("Handled request at /")
    return {"message": "Hello World"}

# Optional: log every request using only Logly
@app.middleware("http")
async def log_requests(request, call_next):
    req_logger = logger.bind(method=request.method, path=request.url.path)
    req_logger.info("Request received")
    response = await call_next(request)
    req_logger.info("Response sent", status_code=response.status_code)
    return response

# Run with:
# uvicorn main:app --reload

How It Works:

• When imported, Logly automatically configures itself as the root logger.

• Clearing Uvicorn’s default handlers and enabling propagation sends all log output (access, error, asgi) through Logly.

• You can add multiple sinks (files, console, callbacks, JSON, etc.) depending on your environment.

Optional: Log Every Request

    @app.middleware("http")
    async def log_requests(request, call_next):
        req_logger = logger.bind(method=request.method, path=request.url.path)
        req_logger.info("Request received")
        response = await call_next(request)
        req_logger.info("Response sent", status_code=response.status_code)
        return response

For a full FastAPI integration example and architecture details, check the official documentation here:
👉 fastapi and context bind

If you have any other issues or need help, feel free to ask! :)