ASGI¶
If the ASGI web framework you're using doesn't have a dedicated integration, you can use the
logfire.instrument_asgi() method to instrument it.
Installation¶
Install logfire with the asgi extra:
pip install 'logfire[asgi]'
uv add 'logfire[asgi]'
poetry add 'logfire[asgi]'
Usage¶
Below we have a minimal example using Uvicorn. You can run it with python main.py:
main.py
import logfire
logfire.configure()
async def app(scope, receive, send):
assert scope["type"] == "http"
await send(
{
"type": "http.response.start",
"status": 200,
"headers": [(b"content-type", b"text/plain"), (b"content-length", b"13")],
}
)
await send({"type": "http.response.body", "body": b"Hello, world!"})
app = logfire.instrument_asgi(app)
if __name__ == "__main__":
import uvicorn
uvicorn.run(app)
The keyword arguments of logfire.instrument_asgi() are passed to the
OpenTelemetryMiddleware class
of the OpenTelemetry ASGI Instrumentation package.
Excluding URLs from instrumentation¶
Note
instrument_asgi does accept an excluded_urls parameter, but does not support specifying said URLs via an environment variable,
unlike other instrumentations.