Aug 16, 2023 · For some reason FastAPI doesn't respond to any requests while a request is handled. I would expect FastAPI to be able to handle multiple requests at the same time. I would like to allow multiple ca...

from fastapi import FastAPI, Request from contextlib import asynccontextmanager @asynccontextmanager async def lifespan(app: FastAPI): ''' Run at startup Initialize the Client and add it to request.state ''' n_client = NotificationClient() yield {'n_client': n_client} ''' Run on shutdown Close the connection Clear variables and release the ...

May 22, 2024 · In the FastAPI web framework, why is httpx so much worse than aiohttp when facing high concurrent requests? They both reuse the same client instance. test code import uvicorn from fastapi import Fa...

Feb 22, 2024 · I have the following decorator that works perfectly, but fastapi says @app.on_event ("startup") is deprecated, and I'm unable to get @repeat_every () to work with lifespan. from fastapi_utils.

Aug 29, 2023 · I was struggling to figure out how to get uvicorn logs to just use the same config that I have set up for all my other logging stuff. After learning uvicorn sets propagate = False, I was able to fix it by including logging.getLogger("uvicorn").propagate = True (or equivalent) as part of my global config. Now the uvicorn logs finally use the same formatting and handlers as …

Mar 15, 2023 · As explained here, if the function for streaming the response body is a normal def generator and not an async def one, FastAPI will use iterate_in_threadpool() to run the iterator/generator in a separate thread that is then await ed—see StreamingResponse 's …

Nov 17, 2019 · I have the following problem: given a backend running fastapi, that has a streaming endpoint, which is used to update the frontend, I want to send these updates every time the function that updates...

Both the FastAPI backend and the Next.js frontend are running on localost. On the same computer, the frontend makes API calls using fetch without any issues. However, on a different computer on the...

Mar 20, 2025 · The FastAPI Advanced Dependencies guide has a couple examples, specifically oriented around classes. But in your example, so long as verify_token("red") returns a callable with the right syntax and type annotations, FastAPI can use it as a dependency. The easy way is to have the function return another function:

Aug 2, 2024 · I want to stream an LLM (ollama) response using fastapi and react. I can successfully get an answer from the LLM without streaming, but when I try to stream it, I get an error in react.