Also, note that FastAPI/Starlette uses the standard json library for parsing the data behind the scenes. If one is looking for a faster alternative, please have a look at this answer that demonstrates how to use orjson instead. Test all the options above Using Python requests library Related answer can be found here.
Using run_in_threadpool() FastAPI is fully compatible with (and based on) Starlette, and hence, with FastAPI you get all of Starlette's features, such as run_in_threadpool(). Starlette's run_in_threadpool(), which uses anyio.to_thread.run_sync() behind the scenes, "will run the sync blocking function in a separate thread to ensure that the main thread (where coroutines are run) does not get ...
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 ...
app.mount(mount_path, sub_app) How can I register startup/shutdown handlers for the sub app? All solutions I could find either require control over the lifespan generator (which I don't have) or involve deprecated methods like add_event_handler (which doesn't work when lifespan is set).
When I use FastAPI , how can I sepcify a base path for the web-service? To put it another way - are there arguments to the FastAPI object that can set the end-point and any others I define, to a different root path?
I'm making a server in python using FastAPI, and I want a function that is not related to my API, to run in the background every 5 minutes (like checking stuff from an API and printing stuff depending on the response).
It seems the issue arises because FastAPI needs to know the root path for all routes when deployed behind a reverse proxy or API Gateway that adds a prefix to the URL. Here's how I resolved it: Set the root_path in FastAPI configuration: This tells FastAPI to prepend the given root path to all routes, ensuring that the OpenAPI documentation and other paths are correctly resolved. app = FastAPI ...
Below are given two options (with complete code samples) on how to stream (live) video using FastAPI and OpenCV. Option 1 demonstrates an approach based on your question using the HTTP protocol and FastAPI/Starlette's StreamingResponse.
So I am learning FastAPI and I am trying to figure out how to return the status code correctly. I made an endpoint for uploading a file and I want to make a special response in case the file format is unsupported.
