Questions about Starlette (a lightweight python ASGI framework/toolkit).
Starlette is a lightweight ASGI framework/toolkit, which is ideal for building high performance asyncio services.
Questions tagged [starlette]
259 questions
7
votes
1 answer
FastAPI UploadFile is slow compared to Flask
I have created an endpoint, as shown below:
@app.post("/report/upload")
def create_upload_files(files: UploadFile = File(...)):
try:
with open(files.filename,'wb+') as wf:
wf.write(file.file.read())
…
user3656746
- 71
- 1
- 2
6
votes
1 answer
How to create a FastAPI endpoint that can accept either Form or JSON body?
I would like to create an endpoint in FastAPI that might receive (multipart) Form data or JSON body. Is there a way I can make such an endpoint accept either, or detect which type of data is receiving?
STY
- 73
- 1
- 6
6
votes
1 answer
How do I convert a torch tensor to an image to be returned by FastAPI?
I have a torch tensor which I need to convert to a byte object so that I can pass it to starlette's StreamingResponse which will return a reconstructed image from the byte object. I am trying to convert the tensor and return it like so:
def…
Just Another Programmer
- 63
- 1
- 5
6
votes
2 answers
How to get the cookies from an HTTP request using FastAPI?
Is it possible to get the cookies when someone hits the API? I need to read the cookies for each request.
@app.get("/")
async def root(text: str, sessionKey: str = Header(None)):
print(sessionKey)
return {"message": text+" returned"}
if…
Praveen K M
- 257
- 6
- 16
6
votes
2 answers
Getting Query Parameters as Dictionary in FastAPI
I spent last month learning Flask, and am now moving on to Pyramid and FastAPI. One of the requirements for my application is to get all the query parameters in a dictionary (there are multiple combinations, and I can assume all keys are unique and…
John Heyer
- 711
- 1
- 6
- 18
6
votes
2 answers
Starlette's url_for doesn't create links with https scheme behind Nginx (via uvicorn)
I've tried everything:
@Starlette:
routes = [
Mount("/static/", StaticFiles(directory=parent+fs+"decoration"+fs+"static"), name="static"),
Route(....),
…
Lopofsky
- 518
- 6
- 15
5
votes
1 answer
How to add background tasks when request fails and HTTPException is raised in FastAPI?
I was trying to generate logs when an exception occurs in my FastAPI endpoint using a Background task as:
from fastapi import BackgroundTasks, FastAPI
app = FastAPI()
def write_notification(message=""):
with open("log.txt", mode="w") as…
Amogh Mishra
- 1,088
- 1
- 16
- 25
5
votes
1 answer
How to modify the scope field of a Request object in Starlette/FastAPI for unit testing
Let's say I have a FastAPI route with a basic get request that looks something like:
@router.get("/reports")
async def get_reports(request: Request) -> Dict:
return
and I want to test it using:
def test_method_can_access_request_fields():
…
John Kealy
- 1,503
- 1
- 13
- 32
5
votes
1 answer
How to save and reuse tokens with authlib
I'm very beginner with authlib and trying to understand its concepts.
I try to understand, how can I save and reuse fetched tokens with authlib.
I created small FastAPI project:
from fastapi import FastAPI
from starlette.config import Config
from…
catscoolzhyk
- 675
- 10
- 29
5
votes
1 answer
Overriding FastAPI's HTTPException response body
I'm currently writing a few end points for an API in fastAPI.
I'm defining classes that extend fastapi's HTTPException.
The problem is that HTTPException returns a response body with an attribute called detail which will either be a string or a json…
neo-devnull
- 51
- 1
- 3
5
votes
1 answer
How does FastAPI's application mounting works?
For certain reasons, we have chosen the FastAPI, in order to use it as back-end tier of our multi-module production. One of its attractive features is sub application, that helps us to separate different modules with intention of making it more…
Ahad Rafat Talebi
- 121
- 3
- 11
5
votes
1 answer
Authentication verification in Python based GraphQL Server using FastAPI
I am having trouble implementing authentication verification in an GraphQL Server built with FastAPI. Before, we were using REST but now we are switching to GraphQL and I am wondering how I can implement this. Before, we had different routers and…
jmandt
- 386
- 5
- 13
5
votes
1 answer
Alembic autogenerate empty migration file
I'm trying to connect the alembic library to the databases and sqlalchemy libraries. As a guide, I use this example link
My projects file:
db.py
from databases import Database
from sqlalchemy import MetaData, create_engine
DATABASE_URL =…
Jekson
- 2,892
- 8
- 44
- 79
5
votes
3 answers
How to programmatically instantiate Starlette's Request with a body?
I have a project with some APIs using FastAPI in which I need to call one of the API functions inside the project. The API function using FastAPI and Starlette looks like this
@router.put("/tab/{tab_name}", tags=["Tab CRUD"])
async def…
Ghasem
- 14,455
- 21
- 138
- 171
5
votes
1 answer
What happens to existing awaits when WebSocket.close is called
If I open a Starlette/FastAPI WebSocket, what happens to any coroutines currently waiting to receive data from the client if I close the WebSocket from outside the coroutine? Does the call to receive raise an exception or does the coroutine sit in…
drhagen
- 8,331
- 8
- 53
- 82