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
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Understanding how Python websocket keepalive mechanism works
Not able to understand how the ping pong is handled for python websockets package. The following is a simple fastapi websocket server and a python client. I expect keepalive timeout error but that does not happen.
FastAPI server:
from fastapi import…
Baenka
- 243
- 3
- 15
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0 answers
Pydantic JSON validation
Currently i am working on a sample project using pydantic and starlette.
This is code from main file:
async def submit(request):
response = await request.json()
resume = Resume(**response)
JsonResponse({"Hello":"World"})
Code from Validation…
0
votes
0 answers
Webpage stops reciving FastAPI websocket events
So I'm transfering from node into FastAPI (Because it's more convinient for me)
And I have a webpage (full code here), which was working in node, but when transferred to FastAPI only starting websocket messages get through, the one in loop get lost…
Moder New
- 457
- 1
- 5
- 18
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Starlette's Middleware causes HTTP communication to stall
I try to make custom middleware to validate upload file in http requests.
sample code:
class MyMiddleware(BaseHTTPMiddleware):
...
async def dispatch(self, request: Request, call_next: RequestResponseEndpoint) -> Response:
…
ttt
- 1
0
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0 answers
FastAPI how to print the HTTP request status code
I am new to FastAPI framework, I want to print out the response status code from a PUT request.
@app.put('/user/{id}', status_code=status.HTTP_200_OK)
async def processing(id: str, request: Request, response: Response):
data = await…
uk_butterfly
- 93
- 1
- 2
- 8
0
votes
1 answer
FastAPI/Starlette, Web UI: Save File Dialog, Open File Dialog
I've been studying this example project. Very concise and to the point, and a pleasant surprise, too: a Save File Dialog (a standard desktop File Dialog, opened from Chrome).
The responsible code:
src/html.py:
@app.post('/download')
def…
Alexey Orlov
- 2,412
- 3
- 27
- 46
0
votes
1 answer
Create parent child object simultaneously when both has no validation/uniqueness issue using encode/databases wrapper
I have a following model where a parent can have many children. User can just create the parent
or create a parent along with the child at the same time.
class Parent(Base):
name = Column(String)
slug = Column(String)
values =…
milan
- 2,409
- 2
- 34
- 71
0
votes
1 answer
utf-8 decode error when trying to feed an image into a model
I have successfully created a webpage that takes an image file and passes it to the API I built. The only problem is that once I feed that image to preprocessing.image.load_img from tensorflow, I get this error:
UnicodeDecodeError: 'utf-8' codec…
Luleo_Primoc
- 75
- 1
- 12
0
votes
1 answer
serve pre-compressed files with Starlette, when uncompressed is requested, but 'accept-encoding' includes 'gzip'
Assuming as request.url
GET /fomantic-ui/default/semantic.min.css
for certain file extension, e.g. .css, I need to serve a pre-compressed .gz version.
From node-express I know an approach, that when applied to Starlette would be to simply…
Wu Wei
- 1,827
- 1
- 15
- 27
0
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0 answers
FastAPI persist DB connection
I use FastAPI in a microservice environment on a public cloud. Most of the request needs a pymongo and redis connection. The preferred model of FastAPI is to inject db connections via dependencies. However the DB is rolling its credentials once a…
Lau
- 1,353
- 7
- 26
0
votes
1 answer
Hypercorn - AsyncioWSGIMiddleware
I couldn't find a way to limit request body size (POST with json body) on Gunicorn/Uvicorn/Hypercorn (using Starlette), and I didn't find anything that suggests it's possible. Is it, by any chance?
Tal
- 91
- 1
- 5
0
votes
1 answer
FastAPI - Set the url or path for the Request object
I have a function that looks like this:
@app.middleware("http")
async def process_api_event(request: Request, call_next):
url = request.url
path = request.url.path
# request.__setattr__('url', 'sample_url')
# request.url.__…
lovprogramming
- 593
- 11
- 24
0
votes
1 answer
Pytorch is really slow and uses a lot of GPU memory when used in Starlette with WEB_CONCURRENCY > 1
I am trying to build an API that uses a Pytorch model. However, as soon as I increase WEB_CONCURRENCY to something above 1, it creates substantially more threads than expected and slows down by a lot, even when sending a single request.
Example…
Matas Minelga
- 70
- 9
0
votes
1 answer
Browser refresh not sending the last-event-id received as part of server sent response
I'm trying to build real time notification system for users using
Server sent events in python.
The issue I'm facing is when I refresh the browser, which means the
browser then will try to hit the EventSource url again, and as per
docs it…
Cyclotron3x3
- 2,188
- 23
- 40
0
votes
1 answer
How to interface hypercorn and starlette web framwork
I was able to get it up and running with gunicorn and uvloop, but having a hard time getting this working with hypercorn. Another issue is specifying the number of workers for ASGI frameworks.
Dan N
- 7
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- 7